assert "next != NULL && next->start <= entry->end" failed in uvm_fault.c (2)
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syzbot
Dec 13, 2021, 11:46:19 PM12/13/21
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: a7a431551857 Fix asprintf() error check. Portable code sho..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=141cbe69b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=e34b09ddf403eb1dfcff
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e34b09...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1604
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*257100 87837 32767 0x10 0x4000000 1K syz-executor.1
274213 87837 32767 0x10 0x4000000 0 syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
uvm_fault_unwire(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000212522a0,ffff8000246daf28,ffff8000246daf80) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff8000246daff0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246daff0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc46b2eb60d0, count: 7
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1604
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
uvm_fault_unwire(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000212522a0,ffff8000246daf28,ffff8000246daf80) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff8000246daff0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246daff0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc46b2eb60d0, count: -8
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000246dacc0
rbx 0xffff800020d39bff
rdx 0x8b
rcx 0x2
rax 0x9f
r8 0xffffffff8108bbb4 kprintf+0x144
r9 0x1
r10 0x910565fb3c2fa42d
r11 0x4b1711e76fd99569
r12 0xffff800020d39a00
r13 0
r14 0
r15 0x1
rip 0xffffffff81c45bc8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000246dacb0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=257100 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=32, usrpri=73, nice=20
forw=0xffffffffffffffff, list=0xffff800021253a40,0xffff800021253510
process=0xffff800021212150 user=0xffff8000246d6000, vmspace=0xfffffd807f0085c0
estcpu=36, cpticks=2, pctcpu=0.0
user=0, sys=2, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
87837 280012 97758 32767 2 0x10 syz-executor.1
*87837 257100 97758 32767 7 0x4000010 syz-executor.1
87837 449497 97758 32767 2 0x4000010 syz-executor.1
87837 274213 97758 32767 7 0x4000010 syz-executor.1
97758 194251 79775 32767 3 0x90 nanoslp syz-executor.1
79775 301633 69817 0 3 0x82 wait syz-executor.1
52725 498120 0 0 3 0x14200 bored sosplice
49990 328549 32754 32767 2 0x10 syz-executor.0
32754 497288 69817 0 3 0x82 wait syz-executor.0
69817 470028 50967 0 3 0x82 kqread syz-fuzzer
69817 226242 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 263340 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 166198 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 175122 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 486490 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 142415 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 372754 50967 0 3 0x4000082 thrsleep syz-fuzzer
50967 280225 11014 0 3 0x10008a sigsusp ksh
11014 225276 49976 0 3 0x9a kqread sshd
22787 80354 1 0 3 0x100083 ttyin getty
49976 142996 1 0 3 0x88 kqread sshd
33466 62508 63332 73 3 0x100090 kqread syslogd
63332 182230 1 0 3 0x100082 netio syslogd
87693 385220 1 0 3 0x100080 kqread resolvd
99215 233306 48953 77 3 0x100092 kqread dhcpleased
61101 256645 48953 77 3 0x100092 kqread dhcpleased
48953 203851 1 0 3 0x80 kqread dhcpleased
49113 11225 0 0 3 0x14200 bored smr
47231 297426 0 0 2 0x14200 zerothread
77938 255890 0 0 3 0x14200 aiodoned aiodoned
81767 491974 0 0 3 0x14200 syncer update
58019 284017 0 0 3 0x14200 cleaner cleaner
85908 245853 0 0 3 0x14200 reaper reaper
76826 468270 0 0 3 0x14200 pgdaemon pagedaemon
39372 352113 0 0 3 0x14200 bored viomb
79842 398565 0 0 3 0x40014200 acpi0 acpi0
37214 340737 0 0 3 0x40014200 idle1
74327 79985 0 0 3 0x14200 bored softnet
96299 31720 0 0 3 0x14200 bored systqmp
45807 433482 0 0 3 0x14200 bored systq
24011 475915 0 0 3 0x40014200 bored softclock
54145 430220 0 0 3 0x40014200 idle0
1 193623 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829f9690)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_fault_unwire_locked+0x5d sys/uvm/uvm_fault.c:1590
#4 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
#5 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
Process 87837 (syz-executor.1) thread 0xffff8000212522a0 (257100)
shared rwlock vmmaplk r = 0 (0xfffffd807f0085d8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 uvm_fault_unwire+0x31 sys/uvm/uvm_fault.c:1558
#2 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
#3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#4 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8296a3e0)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227
#2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433
#4 rw_enter+0x35b sys/kern/kern_rwlock.c:286
#5 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5422
#6 uvmfault_lookup+0xb9 sys/uvm/uvm_fault.c:1695
#7 uvm_fault_check+0x607 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline]
#7 uvm_fault_check+0x607 sys/uvm/uvm_fault.c:712
#8 uvm_fault+0x102 sys/uvm/uvm_fault.c:601
#9 uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1538
#10 sys_sysctl+0x2d8 sys/kern/kern_sysctl.c:241
#11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#12 Xsyscall+0x128
exclusive rwlock sysctllk r = 0 (0xffffffff827670f0)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310
#2 sys_sysctl+0x1b3 sys/kern/kern_sysctl.c:234
#3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#4 Xsyscall+0x128
exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829f9690)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_fault_unwire_locked+0x5d sys/uvm/uvm_fault.c:1590
#4 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
#5 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
Process 87837 (syz-executor.1) thread 0xffff8000212537a0 (274213)
exclusive rwlock futex r = 0 (0xffffffff827ef040)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 sys_futex+0x5c sys/kern/sys_futex.c:108
#2 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#2 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#3 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10148 6358K 6379K 78643K 11243 0
pcb 13 10K 12K 78643K 15 0
rtable 114 3K 4K 78643K 2682 0
ifaddr 39 10K 10K 78643K 46 0
sysctl 1 1K 1K 78643K 1 0
counters 44 34K 34K 78643K 46 0
ioctlops 0 0K 2K 78643K 100 0
iov 0 0K 24K 78643K 557 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1208 76K 76K 78643K 2174 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 61 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 1409 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 7 21K 33K 78643K 4288 0
sigio 0 0K 0K 78643K 277 0
proc 56 74K 99K 78643K 629 0
subproc 26 1K 1K 78643K 39 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 341 0
in_multi 33 2K 2K 78643K 120 0
ether_multi 1 0K 0K 78643K 30 0
mrt 2 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 247 1102K 1102K 78643K 247 0
exec 0 0K 2K 78643K 721 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 227 32K 44K 78643K 58629 0
UVM aobj 131 4K 4K 78643K 137 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 126 0
NDP 5 0K 0K 78643K 12 0
temp 76 4195K 4307K 78643K 12202 0
kqueue 12 18K 26K 78643K 268 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 3289 0 3286 24 21 3 4 0 8 2
rtentry 112 66 0 18 2 0 2 2 0 8 0
unpcb 128 3007 0 2994 28 25 3 5 0 8 2
syncache 296 25 0 25 9 9 0 1 0 8 0
tcpqe 32 10 0 10 4 4 0 1 0 8 0
tcpcb 736 1937 0 1928 80 69 11 15 0 8 9
arp 120 9 0 3 1 0 1 1 0 8 0
ipq 40 16 0 16 4 4 0 1 0 8 0
ipqe 40 368 0 368 4 4 0 1 0 8 0
inpcb 304 4286 0 4277 63 57 6 11 0 8 4
rttmr 72 4 0 3 1 0 1 1 0 8 0
ip6q 72 6 0 6 3 3 0 1 0 8 0
ip6af 40 14 0 14 3 3 0 1 0 8 0
nd6 48 17 0 8 1 0 1 1 0 8 0
kcovpl 48 3 0 1 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 316 0 65 17 0 17 17 0 8 1
art_table 32 317 0 65 3 0 3 3 0 8 0
art_node 16 65 0 21 1 0 1 1 0 8 0
sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 1404 0 1394 1 0 1 1 0 8 0
shmpl 112 134 0 6 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 7359 0 5950 92 3 89 89 0 8 0
ffsino 272 7359 0 5950 96 1 95 95 0 8 0
nchpl 144 13377 0 11776 61 1 60 61 0 8 0
uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0
vnodes 224 5926 0 0 349 0 349 349 0 8 0
namei 1024 44392 0 44392 1 0 1 1 0 8 1
percpumem 16 35 0 1 1 0 1 1 0 8 0
scxspl 216 39718 0 39718 24 21 3 8 0 8 3
plimitpl 152 846 0 836 1 0 1 1 0 8 0
sigapl 424 4507 0 4474 4 0 4 4 0 8 0
futexpl 64 31162 0 31161 1 0 1 1 0 8 0
knotepl 112 100 0 0 2 0 2 2 0 8 0
kqueuepl 216 1495 0 1481 32 27 5 5 0 8 4
pipepl 336 1081 0 1071 44 42 2 11 0 8 1
fdescpl 496 4492 0 4474 3 0 3 3 0 8 0
filepl 152 33660 0 33559 72 64 8 14 0 8 4
lockfpl 104 588 0 586 2 1 1 2 0 8 0
lockfspl 48 175 0 173 1 0 1 1 0 8 0
sessionpl 144 18 0 8 1 0 1 1 0 8 0
pgrppl 48 28 0 18 1 0 1 1 0 8 0
ucredpl 96 6100 0 6088 1 0 1 1 0 8 0
zombiepl 144 4474 0 4473 1 0 1 1 0 8 0
processpl 1064 4507 0 4473 3 0 3 3 0 8 0
procpl 672 13908 0 13864 10 5 5 5 0 8 1
srpgc 96 3 0 3 2 2 0 1 0 8 0
sosppl 168 66 0 66 10 10 0 1 0 8 0
sockpl 480 10702 0 10677 179 167 12 28 0 8 8
mcl64k 65536 18 0 0 3 0 3 3 0 8 0
mcl16k 16384 9 0 0 2 0 2 2 0 8 0
mcl12k 12288 25 0 0 2 0 2 2 0 8 0
mcl9k 9216 16 0 0 2 0 2 2 0 8 0
mcl8k 8192 22 0 0 3 1 2 3 0 8 0
mcl4k 4096 25 0 0 4 1 3 3 0 8 0
mcl2k2 2112 9 0 0 1 0 1 1 0 8 0
mcl2k 2048 204 0 0 21 3 18 21 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 7295 0 0 452 0 452 452 0 8 0
bufpl 280 11557 0 5235 452 0 452 452 0 8 0
anonpl 24 1313775 0 1301988 175 95 80 100 0 186 3
amapchunkpl 152 143181 0 142626 64 40 24 33 0 158 1
amappl16 200 12071 0 11723 71 51 20 31 0 8 1
amappl15 192 71 0 65 1 0 1 1 0 8 0
amappl14 184 2085 0 2081 1 0 1 1 0 8 0
amappl13 176 36 0 34 1 0 1 1 0 8 0
amappl12 168 17 0 12 1 0 1 1 0 8 0
amappl11 160 137 0 121 1 0 1 1 0 8 0
amappl10 152 11 0 10 1 0 1 1 0 8 0
amappl9 144 2343 0 2340 1 0 1 1 0 8 0
amappl8 136 410 0 362 2 0 2 2 0 8 0
amappl7 128 57 0 47 1 0 1 1 0 8 0
amappl6 120 2155 0 2145 1 0 1 1 0 8 0
amappl5 112 4505 0 4488 1 0 1 1 0 8 0
amappl4 104 741 0 708 1 0 1 1 0 8 0
amappl3 96 485 0 469 1 0 1 1 0 8 0
amappl2 88 4873 0 4830 9 7 2 2 0 8 1
amappl1 80 84129 0 83686 12 2 10 12 0 8 0
amappl 88 58174 0 58015 4 0 4 4 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 136 0 6 3 0 3 3 0 8 0
uaddrrnd 24 4492 0 4474 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 4492 0 4474 1 0 1 1 0 8 0
vmmpekpl 168 36451 0 36423 2 0 2 2 0 8 0
vmmpepl 168 419531 0 417890 141 52 89 89 0 357 16
vmsppl 368 4491 0 4474 2 0 2 2 0 8 0
rwobjpl 56 105097 0 104008 27 11 16 19 0 8 0
pdppl 4096 8992 0 8948 64 18 46 50 0 8 2
pvpl 32 2158491 0 2143282 285 146 139 164 0 265 5
pmappl 224 4491 0 4474 2 0 2 2 0 8 1
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 888 0 140 22 0 22 22 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff82772ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
sleep_setup(ffff8000246917d0,ffff8000212537a0,120,ffffffff824489e8,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:370
rwsleep(ffff8000212537a0,ffffffff827ef030,120,ffffffff824489e8,0) at rwsleep+0xc1 sys/kern/kern_synch.c:311
futex_wait(c468c050d70,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260
sys_futex(ffff8000212537a0,ffff800024691960,ffff8000246919c0) at sys_futex+0xf8 sys/kern/sys_futex.c:111
syscall(ffff800024691a30) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800024691a30) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc467f77f370, count: 2
ddb{0}> trace
x86_ipi_db(ffffffff82772ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
sleep_setup(ffff8000246917d0,ffff8000212537a0,120,ffffffff824489e8,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:370
rwsleep(ffff8000212537a0,ffffffff827ef030,120,ffffffff824489e8,0) at rwsleep+0xc1 sys/kern/kern_synch.c:311
futex_wait(c468c050d70,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260
sys_futex(ffff8000212537a0,ffff800024691960,ffff8000246919c0) at sys_futex+0xf8 sys/kern/sys_futex.c:111
syscall(ffff800024691a30) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800024691a30) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc467f77f370, count: -13
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x18: addq $0x8,%rsp
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
uvm_fault_unwire(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000212522a0,ffff8000246daf28,ffff8000246daf80) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff8000246daff0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246daff0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc46b2eb60d0, count: 7
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
uvm_fault_unwire(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000212522a0,ffff8000246daf28,ffff8000246daf80) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff8000246daff0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246daff0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc46b2eb60d0, count: -8
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: a7a431551857 Fix asprintf() error check. Portable code sho..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=141cbe69b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=e34b09ddf403eb1dfcff
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e34b09...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1604
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*257100 87837 32767 0x10 0x4000000 1K syz-executor.1
274213 87837 32767 0x10 0x4000000 0 syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
uvm_fault_unwire(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000212522a0,ffff8000246daf28,ffff8000246daf80) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff8000246daff0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246daff0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc46b2eb60d0, count: 7
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1604
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
uvm_fault_unwire(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000212522a0,ffff8000246daf28,ffff8000246daf80) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff8000246daff0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246daff0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc46b2eb60d0, count: -8
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000246dacc0
rbx 0xffff800020d39bff
rdx 0x8b
rcx 0x2
rax 0x9f
r8 0xffffffff8108bbb4 kprintf+0x144
r9 0x1
r10 0x910565fb3c2fa42d
r11 0x4b1711e76fd99569
r12 0xffff800020d39a00
r13 0
r14 0
r15 0x1
rip 0xffffffff81c45bc8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000246dacb0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=257100 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=32, usrpri=73, nice=20
forw=0xffffffffffffffff, list=0xffff800021253a40,0xffff800021253510
process=0xffff800021212150 user=0xffff8000246d6000, vmspace=0xfffffd807f0085c0
estcpu=36, cpticks=2, pctcpu=0.0
user=0, sys=2, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
87837 280012 97758 32767 2 0x10 syz-executor.1
*87837 257100 97758 32767 7 0x4000010 syz-executor.1
87837 449497 97758 32767 2 0x4000010 syz-executor.1
87837 274213 97758 32767 7 0x4000010 syz-executor.1
97758 194251 79775 32767 3 0x90 nanoslp syz-executor.1
79775 301633 69817 0 3 0x82 wait syz-executor.1
52725 498120 0 0 3 0x14200 bored sosplice
49990 328549 32754 32767 2 0x10 syz-executor.0
32754 497288 69817 0 3 0x82 wait syz-executor.0
69817 470028 50967 0 3 0x82 kqread syz-fuzzer
69817 226242 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 263340 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 166198 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 175122 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 486490 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 142415 50967 0 3 0x4000082 thrsleep syz-fuzzer
69817 372754 50967 0 3 0x4000082 thrsleep syz-fuzzer
50967 280225 11014 0 3 0x10008a sigsusp ksh
11014 225276 49976 0 3 0x9a kqread sshd
22787 80354 1 0 3 0x100083 ttyin getty
49976 142996 1 0 3 0x88 kqread sshd
33466 62508 63332 73 3 0x100090 kqread syslogd
63332 182230 1 0 3 0x100082 netio syslogd
87693 385220 1 0 3 0x100080 kqread resolvd
99215 233306 48953 77 3 0x100092 kqread dhcpleased
61101 256645 48953 77 3 0x100092 kqread dhcpleased
48953 203851 1 0 3 0x80 kqread dhcpleased
49113 11225 0 0 3 0x14200 bored smr
47231 297426 0 0 2 0x14200 zerothread
77938 255890 0 0 3 0x14200 aiodoned aiodoned
81767 491974 0 0 3 0x14200 syncer update
58019 284017 0 0 3 0x14200 cleaner cleaner
85908 245853 0 0 3 0x14200 reaper reaper
76826 468270 0 0 3 0x14200 pgdaemon pagedaemon
39372 352113 0 0 3 0x14200 bored viomb
79842 398565 0 0 3 0x40014200 acpi0 acpi0
37214 340737 0 0 3 0x40014200 idle1
74327 79985 0 0 3 0x14200 bored softnet
96299 31720 0 0 3 0x14200 bored systqmp
45807 433482 0 0 3 0x14200 bored systq
24011 475915 0 0 3 0x40014200 bored softclock
54145 430220 0 0 3 0x40014200 idle0
1 193623 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829f9690)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_fault_unwire_locked+0x5d sys/uvm/uvm_fault.c:1590
#4 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
#5 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
Process 87837 (syz-executor.1) thread 0xffff8000212522a0 (257100)
shared rwlock vmmaplk r = 0 (0xfffffd807f0085d8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 uvm_fault_unwire+0x31 sys/uvm/uvm_fault.c:1558
#2 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
#3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#4 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8296a3e0)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227
#2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433
#4 rw_enter+0x35b sys/kern/kern_rwlock.c:286
#5 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5422
#6 uvmfault_lookup+0xb9 sys/uvm/uvm_fault.c:1695
#7 uvm_fault_check+0x607 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline]
#7 uvm_fault_check+0x607 sys/uvm/uvm_fault.c:712
#8 uvm_fault+0x102 sys/uvm/uvm_fault.c:601
#9 uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1538
#10 sys_sysctl+0x2d8 sys/kern/kern_sysctl.c:241
#11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#12 Xsyscall+0x128
exclusive rwlock sysctllk r = 0 (0xffffffff827670f0)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310
#2 sys_sysctl+0x1b3 sys/kern/kern_sysctl.c:234
#3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#4 Xsyscall+0x128
exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829f9690)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_fault_unwire_locked+0x5d sys/uvm/uvm_fault.c:1590
#4 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
#5 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
Process 87837 (syz-executor.1) thread 0xffff8000212537a0 (274213)
exclusive rwlock futex r = 0 (0xffffffff827ef040)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 sys_futex+0x5c sys/kern/sys_futex.c:108
#2 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#2 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#3 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10148 6358K 6379K 78643K 11243 0
pcb 13 10K 12K 78643K 15 0
rtable 114 3K 4K 78643K 2682 0
ifaddr 39 10K 10K 78643K 46 0
sysctl 1 1K 1K 78643K 1 0
counters 44 34K 34K 78643K 46 0
ioctlops 0 0K 2K 78643K 100 0
iov 0 0K 24K 78643K 557 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1208 76K 76K 78643K 2174 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 61 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 1409 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 7 21K 33K 78643K 4288 0
sigio 0 0K 0K 78643K 277 0
proc 56 74K 99K 78643K 629 0
subproc 26 1K 1K 78643K 39 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 341 0
in_multi 33 2K 2K 78643K 120 0
ether_multi 1 0K 0K 78643K 30 0
mrt 2 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 247 1102K 1102K 78643K 247 0
exec 0 0K 2K 78643K 721 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 227 32K 44K 78643K 58629 0
UVM aobj 131 4K 4K 78643K 137 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 126 0
NDP 5 0K 0K 78643K 12 0
temp 76 4195K 4307K 78643K 12202 0
kqueue 12 18K 26K 78643K 268 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 3289 0 3286 24 21 3 4 0 8 2
rtentry 112 66 0 18 2 0 2 2 0 8 0
unpcb 128 3007 0 2994 28 25 3 5 0 8 2
syncache 296 25 0 25 9 9 0 1 0 8 0
tcpqe 32 10 0 10 4 4 0 1 0 8 0
tcpcb 736 1937 0 1928 80 69 11 15 0 8 9
arp 120 9 0 3 1 0 1 1 0 8 0
ipq 40 16 0 16 4 4 0 1 0 8 0
ipqe 40 368 0 368 4 4 0 1 0 8 0
inpcb 304 4286 0 4277 63 57 6 11 0 8 4
rttmr 72 4 0 3 1 0 1 1 0 8 0
ip6q 72 6 0 6 3 3 0 1 0 8 0
ip6af 40 14 0 14 3 3 0 1 0 8 0
nd6 48 17 0 8 1 0 1 1 0 8 0
kcovpl 48 3 0 1 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 316 0 65 17 0 17 17 0 8 1
art_table 32 317 0 65 3 0 3 3 0 8 0
art_node 16 65 0 21 1 0 1 1 0 8 0
sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 1404 0 1394 1 0 1 1 0 8 0
shmpl 112 134 0 6 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 7359 0 5950 92 3 89 89 0 8 0
ffsino 272 7359 0 5950 96 1 95 95 0 8 0
nchpl 144 13377 0 11776 61 1 60 61 0 8 0
uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0
vnodes 224 5926 0 0 349 0 349 349 0 8 0
namei 1024 44392 0 44392 1 0 1 1 0 8 1
percpumem 16 35 0 1 1 0 1 1 0 8 0
scxspl 216 39718 0 39718 24 21 3 8 0 8 3
plimitpl 152 846 0 836 1 0 1 1 0 8 0
sigapl 424 4507 0 4474 4 0 4 4 0 8 0
futexpl 64 31162 0 31161 1 0 1 1 0 8 0
knotepl 112 100 0 0 2 0 2 2 0 8 0
kqueuepl 216 1495 0 1481 32 27 5 5 0 8 4
pipepl 336 1081 0 1071 44 42 2 11 0 8 1
fdescpl 496 4492 0 4474 3 0 3 3 0 8 0
filepl 152 33660 0 33559 72 64 8 14 0 8 4
lockfpl 104 588 0 586 2 1 1 2 0 8 0
lockfspl 48 175 0 173 1 0 1 1 0 8 0
sessionpl 144 18 0 8 1 0 1 1 0 8 0
pgrppl 48 28 0 18 1 0 1 1 0 8 0
ucredpl 96 6100 0 6088 1 0 1 1 0 8 0
zombiepl 144 4474 0 4473 1 0 1 1 0 8 0
processpl 1064 4507 0 4473 3 0 3 3 0 8 0
procpl 672 13908 0 13864 10 5 5 5 0 8 1
srpgc 96 3 0 3 2 2 0 1 0 8 0
sosppl 168 66 0 66 10 10 0 1 0 8 0
sockpl 480 10702 0 10677 179 167 12 28 0 8 8
mcl64k 65536 18 0 0 3 0 3 3 0 8 0
mcl16k 16384 9 0 0 2 0 2 2 0 8 0
mcl12k 12288 25 0 0 2 0 2 2 0 8 0
mcl9k 9216 16 0 0 2 0 2 2 0 8 0
mcl8k 8192 22 0 0 3 1 2 3 0 8 0
mcl4k 4096 25 0 0 4 1 3 3 0 8 0
mcl2k2 2112 9 0 0 1 0 1 1 0 8 0
mcl2k 2048 204 0 0 21 3 18 21 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 7295 0 0 452 0 452 452 0 8 0
bufpl 280 11557 0 5235 452 0 452 452 0 8 0
anonpl 24 1313775 0 1301988 175 95 80 100 0 186 3
amapchunkpl 152 143181 0 142626 64 40 24 33 0 158 1
amappl16 200 12071 0 11723 71 51 20 31 0 8 1
amappl15 192 71 0 65 1 0 1 1 0 8 0
amappl14 184 2085 0 2081 1 0 1 1 0 8 0
amappl13 176 36 0 34 1 0 1 1 0 8 0
amappl12 168 17 0 12 1 0 1 1 0 8 0
amappl11 160 137 0 121 1 0 1 1 0 8 0
amappl10 152 11 0 10 1 0 1 1 0 8 0
amappl9 144 2343 0 2340 1 0 1 1 0 8 0
amappl8 136 410 0 362 2 0 2 2 0 8 0
amappl7 128 57 0 47 1 0 1 1 0 8 0
amappl6 120 2155 0 2145 1 0 1 1 0 8 0
amappl5 112 4505 0 4488 1 0 1 1 0 8 0
amappl4 104 741 0 708 1 0 1 1 0 8 0
amappl3 96 485 0 469 1 0 1 1 0 8 0
amappl2 88 4873 0 4830 9 7 2 2 0 8 1
amappl1 80 84129 0 83686 12 2 10 12 0 8 0
amappl 88 58174 0 58015 4 0 4 4 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 136 0 6 3 0 3 3 0 8 0
uaddrrnd 24 4492 0 4474 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 4492 0 4474 1 0 1 1 0 8 0
vmmpekpl 168 36451 0 36423 2 0 2 2 0 8 0
vmmpepl 168 419531 0 417890 141 52 89 89 0 357 16
vmsppl 368 4491 0 4474 2 0 2 2 0 8 0
rwobjpl 56 105097 0 104008 27 11 16 19 0 8 0
pdppl 4096 8992 0 8948 64 18 46 50 0 8 2
pvpl 32 2158491 0 2143282 285 146 139 164 0 265 5
pmappl 224 4491 0 4474 2 0 2 2 0 8 1
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 888 0 140 22 0 22 22 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff82772ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
sleep_setup(ffff8000246917d0,ffff8000212537a0,120,ffffffff824489e8,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:370
rwsleep(ffff8000212537a0,ffffffff827ef030,120,ffffffff824489e8,0) at rwsleep+0xc1 sys/kern/kern_synch.c:311
futex_wait(c468c050d70,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260
sys_futex(ffff8000212537a0,ffff800024691960,ffff8000246919c0) at sys_futex+0xf8 sys/kern/sys_futex.c:111
syscall(ffff800024691a30) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800024691a30) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc467f77f370, count: 2
ddb{0}> trace
x86_ipi_db(ffffffff82772ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
sleep_setup(ffff8000246917d0,ffff8000212537a0,120,ffffffff824489e8,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:370
rwsleep(ffff8000212537a0,ffffffff827ef030,120,ffffffff824489e8,0) at rwsleep+0xc1 sys/kern/kern_synch.c:311
futex_wait(c468c050d70,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260
sys_futex(ffff8000212537a0,ffff800024691960,ffff8000246919c0) at sys_futex+0xf8 sys/kern/sys_futex.c:111
syscall(ffff800024691a30) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800024691a30) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc467f77f370, count: -13
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x18: addq $0x8,%rsp
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
uvm_fault_unwire(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000212522a0,ffff8000246daf28,ffff8000246daf80) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff8000246daff0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246daff0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc46b2eb60d0, count: 7
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
uvm_fault_unwire(fffffd807f0085c0,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000212522a0,ffff8000246daf28,ffff8000246daf80) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff8000246daff0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246daff0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc46b2eb60d0, count: -8
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Dec 13, 2021, 11:56:18 PM12/13/21
to syzkaller-o...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: a7a431551857 Fix asprintf() error check. Portable code sho..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=16e81815b00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e34b09...@syzkaller.appspotmail.com
login: panic: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1604
* 81555 85721 32767 0x10 0x4000000 0K syz-executor.0
uvm_fault_unwire(fffffd807f008000,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000fffee2a0,ffff80002127a1c8,ffff80002127a220) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff80002127a290) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002127a290) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1604
ddb{0}> trace
uvm_fault_unwire(fffffd807f008000,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000fffee2a0,ffff80002127a1c8,ffff80002127a220) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff80002127a290) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002127a290) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800021279f60
rbx 0xffffffff82773bff cpu_info_full_primary+0x2bff
r11 0x28c3c52033bbfcf5
r12 0xffffffff82773a00 cpu_info_full_primary+0x2a00
ss 0
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=81555 stat=onproc
forw=0xffffffffffffffff, list=0xffff8000fffeea80,0xffffffff82961198
process=0xffff8000ffff0010 user=0xffff800021275000, vmspace=0xfffffd807f008000
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{0}> ps
85721 499978 33335 32767 3 0x4000090 fsleep syz-executor.0
85721 515136 33335 32767 7 0x4000010 syz-executor.0
*85721 81555 33335 32767 7 0x4000010 syz-executor.0
33335 117530 95023 32767 2 0x490 syz-executor.0
95023 52232 33606 0 3 0x82 wait syz-executor.0
33606 167468 13276 0 2 0x482 syz-execprog
33606 140846 13276 0 2 0x4000482 syz-execprog
33606 239467 13276 0 3 0x4000082 thrsleep syz-execprog
33606 207849 13276 0 3 0x4000082 kqread syz-execprog
33606 299020 13276 0 3 0x4000082 thrsleep syz-execprog
33606 190463 13276 0 3 0x4000082 thrsleep syz-execprog
33606 212297 13276 0 3 0x4000082 thrsleep syz-execprog
33606 416408 13276 0 3 0x4000082 thrsleep syz-execprog
13276 297828 21725 0 3 0x10008a sigsusp ksh
21725 415768 17721 0 3 0x9a kqread sshd
80373 396012 1 0 3 0x100083 ttyin getty
17721 30713 1 0 3 0x88 kqread sshd
91544 417527 87579 73 3 0x100090 kqread syslogd
87579 387658 1 0 3 0x100082 netio syslogd
35709 140975 1 0 3 0x100080 kqread resolvd
8176 97915 38259 77 3 0x100092 kqread dhcpleased
97825 429944 38259 77 3 0x100092 kqread dhcpleased
38259 26427 1 0 3 0x80 kqread dhcpleased
50692 294960 0 0 3 0x14200 bored smr
98210 76187 0 0 2 0x14200 zerothread
36214 226193 0 0 3 0x14200 aiodoned aiodoned
12606 382831 0 0 3 0x14200 syncer update
74565 79404 0 0 3 0x14200 cleaner cleaner
36098 313989 0 0 3 0x14200 reaper reaper
90926 160454 0 0 3 0x14200 pgdaemon pagedaemon
26991 259918 0 0 3 0x14200 bored viomb
33218 383061 0 0 3 0x40014200 acpi0 acpi0
31617 210989 0 0 3 0x40014200 idle1
44321 401123 0 0 3 0x14200 bored softnet
78665 299265 0 0 3 0x14200 bored systqmp
76242 115483 0 0 3 0x14200 bored systq
16757 157405 0 0 3 0x40014200 bored softclock
94113 501119 0 0 3 0x40014200 idle0
1 291096 0 0 3 0x82 wait init
CPU 0:
shared rwlock vmmaplk r = 0 (0xfffffd807f008018)
ddb{0}> show malloc
pcb 13 8K 8K 78643K 13 0
rtable 84 2K 3K 78643K 138 0
ifaddr 32 8K 8K 78643K 32 0
counters 42 33K 33K 78643K 42 0
ioctlops 0 0K 2K 78643K 26 0
proc 56 74K 87K 78643K 251 0
ether_multi 1 0K 0K 78643K 1 0
exec 0 0K 2K 78643K 349 0
UVM aobj 3 2K 2K 78643K 3 0
temp 23 4181K 4245K 78643K 2049 0
kqueue 12 18K 18K 78643K 21 0
rtentry 112 34 0 1 1 0 1 1 0 8 0
unpcb 128 33 0 20 1 0 1 1 0 8 0
syncache 296 5 0 5 1 0 1 1 0 8 1
tcpcb 736 8 0 5 1 0 1 1 0 8 0
arp 120 4 0 0 1 0 1 1 0 8 0
inpcb 304 29 0 23 1 0 1 1 0 8 0
nd6 48 3 0 0 1 0 1 1 0 8 0
art_table 32 146 0 0 2 0 2 2 0 8 0
art_node 16 33 0 3 1 0 1 1 0 8 0
ffsino 272 1460 0 61 94 0 94 94 0 8 0
nchpl 144 1716 0 111 60 0 60 60 0 8 0
uvmvnodes 72 1469 0 0 27 0 27 27 0 8 0
vnodes 224 1469 0 0 87 0 87 87 0 8 0
namei 1024 4424 0 4424 1 0 1 1 0 8 1
percpumem 16 33 0 0 1 0 1 1 0 8 0
scxspl 216 4855 0 4855 2 1 1 2 0 8 1
plimitpl 152 17 0 9 1 0 1 1 0 8 0
sigapl 424 281 0 251 4 0 4 4 0 8 0
futexpl 64 111 0 109 1 0 1 1 0 8 0
knotepl 112 56 0 0 2 0 2 2 0 8 0
kqueuepl 216 17 0 9 1 0 1 1 0 8 0
pipepl 336 76 0 69 1 0 1 1 0 8 0
fdescpl 496 267 0 251 3 0 3 3 0 8 0
filepl 152 1106 0 1041 3 0 3 3 0 8 0
lockfpl 104 6 0 4 1 0 1 1 0 8 0
lockfspl 48 4 0 2 1 0 1 1 0 8 0
sessionpl 144 18 0 9 1 0 1 1 0 8 0
pgrppl 48 18 0 9 1 0 1 1 0 8 0
ucredpl 96 67 0 56 1 0 1 1 0 8 0
zombiepl 144 251 0 251 1 0 1 1 0 8 1
processpl 1064 281 0 251 3 0 3 3 0 8 0
procpl 672 365 0 325 4 0 4 4 0 8 0
sockpl 480 81 0 59 3 0 3 3 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 80 0 0 10 0 10 10 0 8 0
bufpl 280 3361 0 153 230 0 230 230 0 8 0
anonpl 24 45747 0 41901 32 2 30 30 0 186 6
amapchunkpl 152 4591 0 4255 16 2 14 15 0 158 1
amappl16 200 200 0 137 5 1 4 4 0 8 0
amappl15 192 68 0 62 1 0 1 1 0 8 0
amappl14 184 3 0 2 1 0 1 1 0 8 0
amappl13 176 22 0 21 1 0 1 1 0 8 0
amappl12 168 57 0 53 1 0 1 1 0 8 0
amappl11 160 73 0 60 1 0 1 1 0 8 0
amappl10 152 10 0 9 2 1 1 1 0 8 0
amappl9 144 227 0 225 1 0 1 1 0 8 0
amappl8 136 302 0 286 1 0 1 1 0 8 0
amappl7 128 43 0 38 1 0 1 1 0 8 0
amappl6 120 50 0 43 1 0 1 1 0 8 0
amappl5 112 190 0 174 1 0 1 1 0 8 0
amappl4 104 561 0 538 1 0 1 1 0 8 0
amappl3 96 205 0 186 1 0 1 1 0 8 0
amappl2 88 397 0 355 2 0 2 2 0 8 1
amappl1 80 8131 0 7710 12 0 12 12 0 8 3
amappl 88 1941 0 1832 3 0 3 3 0 92 0
uaddrrnd 24 267 0 251 1 0 1 1 0 8 0
vmmpekpl 168 6942 0 6927 1 0 1 1 0 8 0
vmmpepl 168 26580 0 25438 61 0 61 61 0 357 11
vmsppl 368 266 0 251 2 0 2 2 0 8 0
rwobjpl 56 8046 0 7342 14 0 14 14 0 8 3
pdppl 4096 542 0 502 56 14 42 42 0 8 2
pvpl 32 159866 0 153062 132 0 132 132 0 265 77
pmappl 224 266 0 251 1 0 1 1 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
uvm_fault_unwire(fffffd807f008000,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000fffee2a0,ffff80002127a1c8,ffff80002127a220) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff80002127a290) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002127a290) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
rwsleep(ffff8000fffeea80,ffffffff827ef030,120,ffffffff824489e8,0) at rwsleep+0xc1 sys/kern/kern_synch.c:311
futex_wait(2e7e9ac2700,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260
sys_futex(ffff8000fffeea80,ffff8000212744c0,ffff800021274520) at sys_futex+0xf8 sys/kern/sys_futex.c:111
syscall(ffff800021274590) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021274590) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
ddb{1}> trace
x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
rwsleep(ffff8000fffeea80,ffffffff827ef030,120,ffffffff824489e8,0) at rwsleep+0xc1 sys/kern/kern_synch.c:311
futex_wait(2e7e9ac2700,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260
sys_futex(ffff8000fffeea80,ffff8000212744c0,ffff800021274520) at sys_futex+0xf8 sys/kern/sys_futex.c:111
syscall(ffff800021274590) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021274590) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
ddb{1}>
HEAD commit: a7a431551857 Fix asprintf() error check. Portable code sho..
git tree: openbsd
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=e34b09ddf403eb1dfcff
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=149cc483b00000
dashboard link: https://syzkaller.appspot.com/bug?extid=e34b09ddf403eb1dfcff
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e34b09...@syzkaller.appspotmail.com
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
515136 85721 32767 0x10 0x4000000 1 syz-executor.0
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 81555 85721 32767 0x10 0x4000000 0K syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f008000,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire(fffffd807f008000,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000fffee2a0,ffff80002127a1c8,ffff80002127a220) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff80002127a290) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002127a290) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2e82c152740, count: 7
end of kernel
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1604
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f008000,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire(fffffd807f008000,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000fffee2a0,ffff80002127a1c8,ffff80002127a220) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff80002127a290) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002127a290) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2e82c152740, count: -8
end of kernel
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800021279f60
rbx 0xffffffff82773bff cpu_info_full_primary+0x2bff
rdx 0x8b
rcx 0x2
rax 0x9f
r8 0xffffffff8108bbb4 kprintf+0x144
r9 0x1
r10 0x511c13fa81ffbc64
rcx 0x2
rax 0x9f
r8 0xffffffff8108bbb4 kprintf+0x144
r9 0x1
r11 0x28c3c52033bbfcf5
r12 0xffffffff82773a00 cpu_info_full_primary+0x2a00
r13 0
r14 0
r15 0x1
rip 0xffffffff81c45bc8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021279f50
r14 0
r15 0x1
rip 0xffffffff81c45bc8 db_enter+0x18
cs 0x8
rflags 0x246
ss 0
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=81555 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=32, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff8000fffeea80,0xffffffff82961198
process=0xffff8000ffff0010 user=0xffff800021275000, vmspace=0xfffffd807f008000
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
85721 21940 33335 32767 2 0x10 syz-executor.0
85721 499978 33335 32767 3 0x4000090 fsleep syz-executor.0
85721 515136 33335 32767 7 0x4000010 syz-executor.0
*85721 81555 33335 32767 7 0x4000010 syz-executor.0
33335 117530 95023 32767 2 0x490 syz-executor.0
95023 52232 33606 0 3 0x82 wait syz-executor.0
33606 167468 13276 0 2 0x482 syz-execprog
33606 140846 13276 0 2 0x4000482 syz-execprog
33606 239467 13276 0 3 0x4000082 thrsleep syz-execprog
33606 207849 13276 0 3 0x4000082 kqread syz-execprog
33606 299020 13276 0 3 0x4000082 thrsleep syz-execprog
33606 190463 13276 0 3 0x4000082 thrsleep syz-execprog
33606 212297 13276 0 3 0x4000082 thrsleep syz-execprog
33606 416408 13276 0 3 0x4000082 thrsleep syz-execprog
13276 297828 21725 0 3 0x10008a sigsusp ksh
21725 415768 17721 0 3 0x9a kqread sshd
80373 396012 1 0 3 0x100083 ttyin getty
17721 30713 1 0 3 0x88 kqread sshd
91544 417527 87579 73 3 0x100090 kqread syslogd
87579 387658 1 0 3 0x100082 netio syslogd
35709 140975 1 0 3 0x100080 kqread resolvd
8176 97915 38259 77 3 0x100092 kqread dhcpleased
97825 429944 38259 77 3 0x100092 kqread dhcpleased
38259 26427 1 0 3 0x80 kqread dhcpleased
50692 294960 0 0 3 0x14200 bored smr
98210 76187 0 0 2 0x14200 zerothread
36214 226193 0 0 3 0x14200 aiodoned aiodoned
12606 382831 0 0 3 0x14200 syncer update
74565 79404 0 0 3 0x14200 cleaner cleaner
36098 313989 0 0 3 0x14200 reaper reaper
90926 160454 0 0 3 0x14200 pgdaemon pagedaemon
26991 259918 0 0 3 0x14200 bored viomb
33218 383061 0 0 3 0x40014200 acpi0 acpi0
31617 210989 0 0 3 0x40014200 idle1
44321 401123 0 0 3 0x14200 bored softnet
78665 299265 0 0 3 0x14200 bored systqmp
76242 115483 0 0 3 0x14200 bored systq
16757 157405 0 0 3 0x40014200 bored softclock
94113 501119 0 0 3 0x40014200 idle0
1 291096 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &uvm.pageqlock r = 0 (0xffffffff829f9690)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_fault_unwire_locked+0x5d sys/uvm/uvm_fault.c:1590
#4 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
#5 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
Process 85721 (syz-executor.0) thread 0xffff8000fffeea80 (515136)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_fault_unwire_locked+0x5d sys/uvm/uvm_fault.c:1590
#4 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
#5 sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
exclusive rwlock futex r = 0 (0xffffffff827ef040)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 sys_futex+0x5c sys/kern/sys_futex.c:108
#2 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#2 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#3 Xsyscall+0x128
Process 85721 (syz-executor.0) thread 0xffff8000fffee2a0 (81555)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 sys_futex+0x5c sys/kern/sys_futex.c:108
#2 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#2 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#3 Xsyscall+0x128
shared rwlock vmmaplk r = 0 (0xfffffd807f008018)
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10106 6351K 6379K 78643K 11196 0
pcb 13 8K 8K 78643K 13 0
rtable 84 2K 3K 78643K 138 0
ifaddr 32 8K 8K 78643K 32 0
counters 42 33K 33K 78643K 42 0
ioctlops 0 0K 2K 78643K 26 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1182 74K 74K 78643K 1187 0
log 0 0K 0K 78643K 5 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
UFS mount 5 36K 36K 78643K 5 0
VM map 2 1K 1K 78643K 2 0
sem 2 0K 0K 78643K 2 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 4 12K 16K 78643K 52 0
ACPI 1697 195K 286K 78643K 12598 0
proc 56 74K 87K 78643K 251 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 22 1K 1K 78643K 22 0
NFS daemon 1 16K 16K 78643K 1 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 19 95K 95K 78643K 19 0
MSDOSFS mount 1 16K 16K 78643K 1 0
exec 0 0K 2K 78643K 349 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 140 14K 14K 78643K 2233 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM aobj 3 2K 2K 78643K 3 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 4 0K 0K 78643K 6 0
crypto data 1 1K 1K 78643K 1 0
temp 23 4181K 4245K 78643K 2049 0
kqueue 12 18K 18K 78643K 21 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 19 0 16 1 0 1 1 0 8 0
plcache 128 22 0 0 1 0 1 1 0 8 0
rtentry 112 34 0 1 1 0 1 1 0 8 0
unpcb 128 33 0 20 1 0 1 1 0 8 0
syncache 296 5 0 5 1 0 1 1 0 8 1
tcpcb 736 8 0 5 1 0 1 1 0 8 0
arp 120 4 0 0 1 0 1 1 0 8 0
inpcb 304 29 0 23 1 0 1 1 0 8 0
nd6 48 3 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 145 0 0 10 0 10 10 0 8 0
art_table 32 146 0 0 2 0 2 2 0 8 0
art_node 16 33 0 3 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1460 0 61 88 0 88 88 0 8 0
ffsino 272 1460 0 61 94 0 94 94 0 8 0
nchpl 144 1716 0 111 60 0 60 60 0 8 0
uvmvnodes 72 1469 0 0 27 0 27 27 0 8 0
vnodes 224 1469 0 0 87 0 87 87 0 8 0
namei 1024 4424 0 4424 1 0 1 1 0 8 1
percpumem 16 33 0 0 1 0 1 1 0 8 0
scxspl 216 4855 0 4855 2 1 1 2 0 8 1
plimitpl 152 17 0 9 1 0 1 1 0 8 0
sigapl 424 281 0 251 4 0 4 4 0 8 0
futexpl 64 111 0 109 1 0 1 1 0 8 0
knotepl 112 56 0 0 2 0 2 2 0 8 0
kqueuepl 216 17 0 9 1 0 1 1 0 8 0
pipepl 336 76 0 69 1 0 1 1 0 8 0
fdescpl 496 267 0 251 3 0 3 3 0 8 0
filepl 152 1106 0 1041 3 0 3 3 0 8 0
lockfpl 104 6 0 4 1 0 1 1 0 8 0
lockfspl 48 4 0 2 1 0 1 1 0 8 0
sessionpl 144 18 0 9 1 0 1 1 0 8 0
pgrppl 48 18 0 9 1 0 1 1 0 8 0
ucredpl 96 67 0 56 1 0 1 1 0 8 0
zombiepl 144 251 0 251 1 0 1 1 0 8 1
processpl 1064 281 0 251 3 0 3 3 0 8 0
procpl 672 365 0 325 4 0 4 4 0 8 0
sockpl 480 81 0 59 3 0 3 3 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 80 0 0 10 0 10 10 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 134 0 0 9 0 9 9 0 8 0
bufpl 280 3361 0 153 230 0 230 230 0 8 0
anonpl 24 45747 0 41901 32 2 30 30 0 186 6
amapchunkpl 152 4591 0 4255 16 2 14 15 0 158 1
amappl16 200 200 0 137 5 1 4 4 0 8 0
amappl15 192 68 0 62 1 0 1 1 0 8 0
amappl14 184 3 0 2 1 0 1 1 0 8 0
amappl13 176 22 0 21 1 0 1 1 0 8 0
amappl12 168 57 0 53 1 0 1 1 0 8 0
amappl11 160 73 0 60 1 0 1 1 0 8 0
amappl10 152 10 0 9 2 1 1 1 0 8 0
amappl9 144 227 0 225 1 0 1 1 0 8 0
amappl8 136 302 0 286 1 0 1 1 0 8 0
amappl7 128 43 0 38 1 0 1 1 0 8 0
amappl6 120 50 0 43 1 0 1 1 0 8 0
amappl5 112 190 0 174 1 0 1 1 0 8 0
amappl4 104 561 0 538 1 0 1 1 0 8 0
amappl3 96 205 0 186 1 0 1 1 0 8 0
amappl2 88 397 0 355 2 0 2 2 0 8 1
amappl1 80 8131 0 7710 12 0 12 12 0 8 3
amappl 88 1941 0 1832 3 0 3 3 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 2 0 0 1 0 1 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
uaddrrnd 24 267 0 251 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 267 0 251 1 0 1 1 0 8 0
vmmpekpl 168 6942 0 6927 1 0 1 1 0 8 0
vmmpepl 168 26580 0 25438 61 0 61 61 0 357 11
vmsppl 368 266 0 251 2 0 2 2 0 8 0
rwobjpl 56 8046 0 7342 14 0 14 14 0 8 3
pdppl 4096 542 0 502 56 14 42 42 0 8 2
pvpl 32 159866 0 153062 132 0 132 132 0 265 77
pmappl 224 266 0 251 1 0 1 1 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 281 0 16 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire_locked(fffffd807f008000,20000000,20029000) at uvm_fault_unwire_locked+0x29b sys/uvm/uvm_fault.c:1601
panic(ffffffff8244a0ca) at panic+0x177 sys/kern/subr_prf.c:202
__assert(ffffffff824bdd78,ffffffff8241eef8,644,ffffffff8242d54d) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_fault_unwire(fffffd807f008000,20000000,20029000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1559
sys_sysctl(ffff8000fffee2a0,ffff80002127a1c8,ffff80002127a220) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:255
syscall(ffff80002127a290) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002127a290) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2e82c152740, count: -8
end of kernel
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
sleep_setup(ffff800021274330,ffff8000fffeea80,120,ffffffff824489e8,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:370
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
rwsleep(ffff8000fffeea80,ffffffff827ef030,120,ffffffff824489e8,0) at rwsleep+0xc1 sys/kern/kern_synch.c:311
futex_wait(2e7e9ac2700,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260
sys_futex(ffff8000fffeea80,ffff8000212744c0,ffff800021274520) at sys_futex+0xf8 sys/kern/sys_futex.c:111
syscall(ffff800021274590) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021274590) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2e8c251cdb0, count: 5
end of kernel
ddb{1}> trace
x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
sleep_setup(ffff800021274330,ffff8000fffeea80,120,ffffffff824489e8,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:370
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8296a1d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
rwsleep(ffff8000fffeea80,ffffffff827ef030,120,ffffffff824489e8,0) at rwsleep+0xc1 sys/kern/kern_synch.c:311
futex_wait(2e7e9ac2700,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260
sys_futex(ffff8000fffeea80,ffff8000212744c0,ffff800021274520) at sys_futex+0xf8 sys/kern/sys_futex.c:111
syscall(ffff800021274590) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021274590) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2e8c251cdb0, count: -10
end of kernel
ddb{1}>
Anton Lindqvist
Feb 22, 2022, 1:45:24 PM2/22/22
to syzbot, syzkaller-o...@googlegroups.com
Hopefully fixed by uvm/uvm_map.c r1.282.
#syz invalid
#syz invalid
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