uvm_fault: x86_ipi_db (3)
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syzbot
Feb 6, 2021, 8:27:18 PM2/6/21
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: d1d99961 6.9-beta
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=137927bf500000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=78df8d9308d9b49bef58
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+78df8d...@syzkaller.appspotmail.com
uvm_fault(fffffd807eff98a0,20000000,0,1) at uvm_fault+0x17c sys/uvm/uvm_fault.c:977
kpageflttrap(ffff8000242e6f50,20000000) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265
kerntrap(ffff8000242e6f50) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyin() at copyin+0x53
sys_connect(ffff80002123c000,ffff8000242e7118,ffff8000242e7160) at sys_connect+0x9b sys/kern/uipc_syscalls.c:362
syscall(ffff8000242e71e0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000242e71e0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2fe88703ab0, count: -13
ddb{0}> show registers
rdi 0x3
rsi 0x40000 acpi_pdirpa+0x2be68
rbp 0xffff8000242e6a50
rbx 0x3
rdx 0xffff800000b0afc0
rcx 0x3
rax 0x3ffff acpi_pdirpa+0x2be67
r8 0xffffffff811412e1 witness_checkorder+0x1061
r9 0x5
r10 0xe3893b2a9a36cf0
r11 0xb26fa93031d7062
r12 0xffffffff828530d0 w_lodata+0x4c500
r13 0xffffffff82728380 netlock+0x10
r14 0xffffffff8284ecc0 w_lodata+0x480f0
r15 0xfffffd8002cd6680
rip 0xffffffff821bfb88 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000242e6a40
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=299501 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=80, nice=20
forw=0xffffffffffffffff, list=0xffff80002123c2a0,0xffff80002123cd30
process=0xffff800021236a40 user=0xffff8000242e2000, vmspace=0xfffffd807eff98a0
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
79609 506325 25921 0 2 0 syz-executor.1
2187 521570 36362 0 7 0 syz-executor.0
* 2187 299501 36362 0 7 0x4000000 syz-executor.0
19755 417364 0 0 3 0x14200 bored sosplice
25921 91507 97127 0 3 0x82 nanoslp syz-executor.1
36362 342134 97127 0 3 0x82 nanoslp syz-executor.0
97127 353690 15627 0 3 0x82 thrsleep syz-fuzzer
97127 291739 15627 0 3 0x4000082 nanoslp syz-fuzzer
97127 392053 15627 0 3 0x4000082 thrsleep syz-fuzzer
97127 261636 15627 0 3 0x4000082 thrsleep syz-fuzzer
97127 28108 15627 0 3 0x4000082 thrsleep syz-fuzzer
97127 312145 15627 0 3 0x4000082 kqread syz-fuzzer
97127 522269 15627 0 3 0x4000082 thrsleep syz-fuzzer
97127 392191 15627 0 3 0x4000082 thrsleep syz-fuzzer
97127 455317 15627 0 3 0x4000082 thrsleep syz-fuzzer
15627 235113 1377 0 3 0x10008a sigsusp ksh
1377 413662 46643 0 3 0x92 select sshd
34270 302830 1 0 3 0x100083 ttyin getty
46643 147243 1 0 3 0x80 select sshd
35504 343248 30202 74 3 0x100092 bpf pflogd
30202 47814 1 0 3 0x80 netio pflogd
11207 367245 32504 73 3 0x100090 kqread syslogd
32504 498804 1 0 3 0x100082 netio syslogd
85057 87828 1 77 3 0x100090 poll dhclient
78788 21896 1 0 3 0x80 poll dhclient
50233 378108 0 0 3 0x14200 bored smr
7669 102431 0 0 2 0x14200 zerothread
44534 150922 0 0 3 0x14200 aiodoned aiodoned
83727 185335 0 0 3 0x14200 syncer update
60778 316703 0 0 3 0x14200 cleaner cleaner
14390 37671 0 0 3 0x14200 reaper reaper
89244 494504 0 0 3 0x14200 pgdaemon pagedaemon
86878 254253 0 0 3 0x14200 bored crynlk
7706 371235 0 0 3 0x14200 bored crypto
46525 66522 0 0 3 0x14200 bored viomb
47778 368997 0 0 3 0x40014200 acpi0 acpi0
73971 267145 0 0 3 0x40014200 idle1
8533 349732 0 0 3 0x14200 bored softnet
59215 40622 0 0 3 0x14200 bored systqmp
32126 19276 0 0 3 0x14200 bored systq
56445 223792 0 0 3 0x40014200 bored softclock
4180 16955 0 0 3 0x40014200 idle0
1 505071 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 2187 (syz-executor.0) thread 0xffff80002123c000 (299501)
exclusive rrwlock inode r = 0 (0xfffffd8069d945f0)
#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+0x443 sys/kern/kern_rwlock.c:312
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:463
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
#4 vn_lock+0x6c sys/kern/vfs_vnops.c:575
#5 uvn_get+0xd7 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline]
#5 uvn_get+0xd7 sys/uvm/uvm_vnode.c:993
#6 uvm_fault_lower+0x5e7 sys/uvm/uvm_fault.c:1146
#7 uvm_fault+0x17c sys/uvm/uvm_fault.c:977
#8 kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265
#9 kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
#10 alltraps_kern_meltdown+0x7b
#11 copyin+0x53
#12 sys_connect+0x9b sys/kern/uipc_syscalls.c:362
#13 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#14 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 2 (0xffffffff828bf600)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 syscall+0x3fd mi_syscall sys/sys/syscall_mi.h:93 [inline]
#1 syscall+0x3fd sys/arch/amd64/amd64/trap.c:590
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9529 6434K 7200K 78643K 13674 0
pcb 13 8K 8K 78643K 162 0
rtable 108 3K 4K 78643K 415 0
ifaddr 69 13K 13K 78643K 119 0
sysctl 2 0K 0K 78643K 2 0
counters 44 34K 34K 78643K 62 0
ioctlops 0 0K 4K 78643K 1551 0
iov 0 0K 12K 78643K 112 0
mount 1 1K 1K 78643K 1 0
vnodes 1228 77K 78K 78643K 2494 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 27 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 196 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 6 17K 25K 78643K 4084 0
sigio 0 0K 0K 78643K 41 0
proc 62 63K 95K 78643K 700 0
subproc 32 2K 2K 78643K 51 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 225 0
in_multi 33 2K 2K 78643K 243 0
ether_multi 1 0K 0K 78643K 73 0
mrt 1 0K 0K 78643K 44 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 49 228K 228K 78643K 49 0
exec 0 0K 2K 78643K 429 0
pfkey data 0 0K 0K 78643K 5 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 131 24K 27K 78643K 9907 0
UVM aobj 38 7K 7K 78643K 38 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 80 0
NDP 12 0K 0K 78643K 27 0
temp 130 3982K 4100K 78643K 20163 0
kqueue 3 4K 14K 78643K 169 0
SYN cache 2 2400K 2408K 78643K 4 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 120 103 0 101 1 0 1 1 0 8 0
rtentry 112 63 0 19 2 0 2 2 0 8 0
unpcb 120 1019 0 987 3 1 2 2 0 8 0
syncache 296 19 0 19 4 4 0 1 0 8 0
tcpqe 32 58 0 58 4 4 0 1 0 8 0
tcpcb 736 431 0 427 13 12 1 4 0 8 0
inpcb 304 1145 0 1137 10 9 1 2 0 8 0
rttmr 72 6 0 6 1 1 0 1 0 8 0
nd6 48 10 0 4 1 0 1 1 0 8 0
pkpcb 40 34 0 34 4 4 0 1 0 8 0
kcovpl 48 3 0 1 1 0 1 1 0 8 0
pffrag 232 1 0 1 1 1 0 1 0 482 0
pffrnode 88 1 0 1 1 1 0 1 0 8 0
pffrent 40 2 0 2 1 1 0 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfqueue 264 5 0 5 1 1 0 1 0 8 0
pfstitem 24 41 0 32 1 0 1 1 0 8 0
pfstkey 112 41 0 32 1 0 1 1 0 8 0
pfstate 320 41 0 32 3 1 2 2 0 8 0
pfrule 1360 40 0 34 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 251 0 59 13 1 12 13 0 8 0
art_table 32 252 0 59 2 0 2 2 0 8 0
art_node 16 62 0 22 1 0 1 1 0 8 0
sysvmsgpl 40 44 0 26 1 0 1 1 0 8 0
semupl 112 18 0 18 1 1 0 1 0 8 0
semapl 112 194 0 184 1 0 1 1 0 8 0
shmpl 112 35 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 6509 0 5107 90 2 88 89 0 8 0
ffsino 272 6509 0 5107 95 0 95 95 0 8 0
nchpl 144 11208 0 9620 60 0 60 60 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 26684 0 26684 2 1 1 1 0 8 1
percpumem 16 42 0 9 1 0 1 1 0 8 0
scxspl 216 34518 0 34518 10 9 1 8 0 8 1
plimitpl 152 46 0 38 1 0 1 1 0 8 0
sigapl 424 4298 0 4264 4 0 4 4 0 8 0
futexpl 56 24738 0 24738 2 1 1 1 0 8 1
knotepl 112 245 0 225 1 0 1 1 0 8 0
kqueuepl 168 2103 0 2101 1 0 1 1 0 8 0
pipepl 336 159 0 148 4 2 2 2 0 8 0
fdescpl 496 4281 0 4264 3 0 3 3 0 8 0
filepl 152 12747 0 12643 8 3 5 6 0 8 1
lockfpl 104 334 0 333 1 0 1 1 0 8 0
lockfspl 48 139 0 138 1 0 1 1 0 8 0
sessionpl 144 19 0 8 1 0 1 1 0 8 0
pgrppl 48 19 0 8 1 0 1 1 0 8 0
ucredpl 96 1137 0 1128 1 0 1 1 0 8 0
zombiepl 144 4264 0 4264 1 0 1 1 0 8 1
processpl 1080 4298 0 4264 3 0 3 3 0 8 0
procpl 672 9122 0 9079 5 1 4 5 0 8 0
sosppl 168 5 0 5 1 1 0 1 0 8 0
sockpl 432 2301 0 2249 16 9 7 8 0 8 0
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl12k 12288 9 0 0 1 0 1 1 0 8 0
mcl9k 9216 7 0 0 1 0 1 1 0 8 0
mcl8k 8192 6 0 0 1 0 1 1 0 8 0
mcl4k 4096 8 0 0 1 0 1 1 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 216 0 0 15 0 15 15 0 8 0
mtagpl 96 199 0 0 5 0 5 5 0 8 0
mbufpl 256 707 0 0 37 0 37 37 0 8 0
bufpl 280 9107 0 2860 447 0 447 447 0 8 0
anonpl 24 331182 0 325019 88 46 42 83 0 186 0
amapchunkpl 152 15470 0 15314 13 6 7 9 0 158 0
amappl16 200 15121 0 14877 51 38 13 37 0 8 0
amappl15 192 1555 0 1553 1 0 1 1 0 8 0
amappl14 184 23 0 19 1 0 1 1 0 8 0
amappl13 176 35 0 34 1 0 1 1 0 8 0
amappl12 168 4 0 1 1 0 1 1 0 8 0
amappl11 160 58 0 41 1 0 1 1 0 8 0
amappl10 152 15 0 11 1 0 1 1 0 8 0
amappl9 144 15 0 15 1 1 0 1 0 8 0
amappl8 136 4273 0 4209 3 0 3 3 0 8 0
amappl7 128 262 0 250 1 0 1 1 0 8 0
amappl6 120 72 0 58 1 0 1 1 0 8 0
amappl5 112 4972 0 4951 1 0 1 1 0 8 0
amappl4 104 314 0 283 1 0 1 1 0 8 0
amappl3 96 177 0 169 1 0 1 1 0 8 0
amappl2 88 33333 0 33259 3 1 2 3 0 8 0
amappl1 80 127455 0 126972 28 16 12 21 0 8 0
amappl 88 9401 0 9349 2 0 2 2 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 37 0 0 1 0 1 1 0 8 0
uaddrrnd 24 4281 0 4264 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 4281 0 4264 1 0 1 1 0 8 0
vmmpekpl 168 21332 0 21304 2 0 2 2 0 8 0
vmmpepl 168 535706 0 534151 120 49 71 89 0 357 2
vmsppl 368 4280 0 4264 2 0 2 2 0 8 0
rwobjpl 56 112504 0 111546 39 24 15 21 0 8 1
pdppl 4096 8569 0 8528 57 16 41 45 0 8 0
pvpl 32 1516476 0 1507137 197 112 85 141 0 265 0
pmappl 232 4280 0 4264 2 1 1 2 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 342 0 37 9 0 9 9 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:398
witness_checkorder(ffffffff82728380,9,0) at witness_checkorder+0x108b
rw_enter_write(ffffffff82728370) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128
uvn_get(fffffd80668957b0,0,ffff8000242e6c58,ffff8000242e6c3c,0,1) at uvn_get+0xeb uvm_vnode_lock sys/uvm/uvm_vnode.c:1501 [inline]
uvn_get(fffffd80668957b0,0,ffff8000242e6c58,ffff8000242e6c3c,0,1) at uvn_get+0xeb sys/uvm/uvm_vnode.c:993
uvm_fault_lower(ffff8000242e6dc0,ffff8000242e6df8,ffff8000242e6cc0,0) at uvm_fault_lower+0x5e7 sys/uvm/uvm_fault.c:1146
uvm_fault(fffffd807eff98a0,20000000,0,1) at uvm_fault+0x17c sys/uvm/uvm_fault.c:977
kpageflttrap(ffff8000242e6f50,20000000) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265
kerntrap(ffff8000242e6f50) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyin() at copyin+0x53
sys_connect(ffff80002123c000,ffff8000242e7118,ffff8000242e7160) at sys_connect+0x9b sys/kern/uipc_syscalls.c:362
syscall(ffff8000242e71e0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000242e71e0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2fe88703ab0, count: -13
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
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(ffffffff828bf3f8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff828bf3f8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
sleep_setup(ffff8000222b9078,ffffffff8277bc20,120,ffffffff823a035a) at sleep_setup+0xc7 sys/kern/kern_synch.c:382
tsleep(ffffffff8277bc20,120,ffffffff823a035a,2) at tsleep+0x113 sleep_setup_timeout sys/kern/kern_synch.c:444 [inline]
tsleep(ffffffff8277bc20,120,ffffffff823a035a,2) at tsleep+0x113 sys/kern/kern_synch.c:159
sys_nanosleep(ffff80002123c2a0,ffff8000222b91a0,ffff8000222b91f0) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297
syscall(ffff8000222b9270) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000222b9270) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd4270, count: -9
---
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: d1d99961 6.9-beta
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=137927bf500000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=78df8d9308d9b49bef58
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+78df8d...@syzkaller.appspotmail.com
uvm_fault(fffffd807eff98a0,20000000,0,1) at uvm_fault+0x17c sys/uvm/uvm_fault.c:977
kpageflttrap(ffff8000242e6f50,20000000) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265
kerntrap(ffff8000242e6f50) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyin() at copyin+0x53
sys_connect(ffff80002123c000,ffff8000242e7118,ffff8000242e7160) at sys_connect+0x9b sys/kern/uipc_syscalls.c:362
syscall(ffff8000242e71e0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000242e71e0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2fe88703ab0, count: -13
ddb{0}> show registers
rdi 0x3
rsi 0x40000 acpi_pdirpa+0x2be68
rbp 0xffff8000242e6a50
rbx 0x3
rdx 0xffff800000b0afc0
rcx 0x3
rax 0x3ffff acpi_pdirpa+0x2be67
r8 0xffffffff811412e1 witness_checkorder+0x1061
r9 0x5
r10 0xe3893b2a9a36cf0
r11 0xb26fa93031d7062
r12 0xffffffff828530d0 w_lodata+0x4c500
r13 0xffffffff82728380 netlock+0x10
r14 0xffffffff8284ecc0 w_lodata+0x480f0
r15 0xfffffd8002cd6680
rip 0xffffffff821bfb88 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000242e6a40
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=299501 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=80, nice=20
forw=0xffffffffffffffff, list=0xffff80002123c2a0,0xffff80002123cd30
process=0xffff800021236a40 user=0xffff8000242e2000, vmspace=0xfffffd807eff98a0
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
79609 506325 25921 0 2 0 syz-executor.1
2187 521570 36362 0 7 0 syz-executor.0
* 2187 299501 36362 0 7 0x4000000 syz-executor.0
19755 417364 0 0 3 0x14200 bored sosplice
25921 91507 97127 0 3 0x82 nanoslp syz-executor.1
36362 342134 97127 0 3 0x82 nanoslp syz-executor.0
97127 353690 15627 0 3 0x82 thrsleep syz-fuzzer
97127 291739 15627 0 3 0x4000082 nanoslp syz-fuzzer
97127 392053 15627 0 3 0x4000082 thrsleep syz-fuzzer
97127 261636 15627 0 3 0x4000082 thrsleep syz-fuzzer
97127 28108 15627 0 3 0x4000082 thrsleep syz-fuzzer
97127 312145 15627 0 3 0x4000082 kqread syz-fuzzer
97127 522269 15627 0 3 0x4000082 thrsleep syz-fuzzer
97127 392191 15627 0 3 0x4000082 thrsleep syz-fuzzer
97127 455317 15627 0 3 0x4000082 thrsleep syz-fuzzer
15627 235113 1377 0 3 0x10008a sigsusp ksh
1377 413662 46643 0 3 0x92 select sshd
34270 302830 1 0 3 0x100083 ttyin getty
46643 147243 1 0 3 0x80 select sshd
35504 343248 30202 74 3 0x100092 bpf pflogd
30202 47814 1 0 3 0x80 netio pflogd
11207 367245 32504 73 3 0x100090 kqread syslogd
32504 498804 1 0 3 0x100082 netio syslogd
85057 87828 1 77 3 0x100090 poll dhclient
78788 21896 1 0 3 0x80 poll dhclient
50233 378108 0 0 3 0x14200 bored smr
7669 102431 0 0 2 0x14200 zerothread
44534 150922 0 0 3 0x14200 aiodoned aiodoned
83727 185335 0 0 3 0x14200 syncer update
60778 316703 0 0 3 0x14200 cleaner cleaner
14390 37671 0 0 3 0x14200 reaper reaper
89244 494504 0 0 3 0x14200 pgdaemon pagedaemon
86878 254253 0 0 3 0x14200 bored crynlk
7706 371235 0 0 3 0x14200 bored crypto
46525 66522 0 0 3 0x14200 bored viomb
47778 368997 0 0 3 0x40014200 acpi0 acpi0
73971 267145 0 0 3 0x40014200 idle1
8533 349732 0 0 3 0x14200 bored softnet
59215 40622 0 0 3 0x14200 bored systqmp
32126 19276 0 0 3 0x14200 bored systq
56445 223792 0 0 3 0x40014200 bored softclock
4180 16955 0 0 3 0x40014200 idle0
1 505071 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 2187 (syz-executor.0) thread 0xffff80002123c000 (299501)
exclusive rrwlock inode r = 0 (0xfffffd8069d945f0)
#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+0x443 sys/kern/kern_rwlock.c:312
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:463
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
#4 vn_lock+0x6c sys/kern/vfs_vnops.c:575
#5 uvn_get+0xd7 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline]
#5 uvn_get+0xd7 sys/uvm/uvm_vnode.c:993
#6 uvm_fault_lower+0x5e7 sys/uvm/uvm_fault.c:1146
#7 uvm_fault+0x17c sys/uvm/uvm_fault.c:977
#8 kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265
#9 kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
#10 alltraps_kern_meltdown+0x7b
#11 copyin+0x53
#12 sys_connect+0x9b sys/kern/uipc_syscalls.c:362
#13 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#14 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 2 (0xffffffff828bf600)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 syscall+0x3fd mi_syscall sys/sys/syscall_mi.h:93 [inline]
#1 syscall+0x3fd sys/arch/amd64/amd64/trap.c:590
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9529 6434K 7200K 78643K 13674 0
pcb 13 8K 8K 78643K 162 0
rtable 108 3K 4K 78643K 415 0
ifaddr 69 13K 13K 78643K 119 0
sysctl 2 0K 0K 78643K 2 0
counters 44 34K 34K 78643K 62 0
ioctlops 0 0K 4K 78643K 1551 0
iov 0 0K 12K 78643K 112 0
mount 1 1K 1K 78643K 1 0
vnodes 1228 77K 78K 78643K 2494 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 27 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 196 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 6 17K 25K 78643K 4084 0
sigio 0 0K 0K 78643K 41 0
proc 62 63K 95K 78643K 700 0
subproc 32 2K 2K 78643K 51 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 225 0
in_multi 33 2K 2K 78643K 243 0
ether_multi 1 0K 0K 78643K 73 0
mrt 1 0K 0K 78643K 44 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 49 228K 228K 78643K 49 0
exec 0 0K 2K 78643K 429 0
pfkey data 0 0K 0K 78643K 5 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 131 24K 27K 78643K 9907 0
UVM aobj 38 7K 7K 78643K 38 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 80 0
NDP 12 0K 0K 78643K 27 0
temp 130 3982K 4100K 78643K 20163 0
kqueue 3 4K 14K 78643K 169 0
SYN cache 2 2400K 2408K 78643K 4 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 120 103 0 101 1 0 1 1 0 8 0
rtentry 112 63 0 19 2 0 2 2 0 8 0
unpcb 120 1019 0 987 3 1 2 2 0 8 0
syncache 296 19 0 19 4 4 0 1 0 8 0
tcpqe 32 58 0 58 4 4 0 1 0 8 0
tcpcb 736 431 0 427 13 12 1 4 0 8 0
inpcb 304 1145 0 1137 10 9 1 2 0 8 0
rttmr 72 6 0 6 1 1 0 1 0 8 0
nd6 48 10 0 4 1 0 1 1 0 8 0
pkpcb 40 34 0 34 4 4 0 1 0 8 0
kcovpl 48 3 0 1 1 0 1 1 0 8 0
pffrag 232 1 0 1 1 1 0 1 0 482 0
pffrnode 88 1 0 1 1 1 0 1 0 8 0
pffrent 40 2 0 2 1 1 0 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfqueue 264 5 0 5 1 1 0 1 0 8 0
pfstitem 24 41 0 32 1 0 1 1 0 8 0
pfstkey 112 41 0 32 1 0 1 1 0 8 0
pfstate 320 41 0 32 3 1 2 2 0 8 0
pfrule 1360 40 0 34 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 251 0 59 13 1 12 13 0 8 0
art_table 32 252 0 59 2 0 2 2 0 8 0
art_node 16 62 0 22 1 0 1 1 0 8 0
sysvmsgpl 40 44 0 26 1 0 1 1 0 8 0
semupl 112 18 0 18 1 1 0 1 0 8 0
semapl 112 194 0 184 1 0 1 1 0 8 0
shmpl 112 35 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 6509 0 5107 90 2 88 89 0 8 0
ffsino 272 6509 0 5107 95 0 95 95 0 8 0
nchpl 144 11208 0 9620 60 0 60 60 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 26684 0 26684 2 1 1 1 0 8 1
percpumem 16 42 0 9 1 0 1 1 0 8 0
scxspl 216 34518 0 34518 10 9 1 8 0 8 1
plimitpl 152 46 0 38 1 0 1 1 0 8 0
sigapl 424 4298 0 4264 4 0 4 4 0 8 0
futexpl 56 24738 0 24738 2 1 1 1 0 8 1
knotepl 112 245 0 225 1 0 1 1 0 8 0
kqueuepl 168 2103 0 2101 1 0 1 1 0 8 0
pipepl 336 159 0 148 4 2 2 2 0 8 0
fdescpl 496 4281 0 4264 3 0 3 3 0 8 0
filepl 152 12747 0 12643 8 3 5 6 0 8 1
lockfpl 104 334 0 333 1 0 1 1 0 8 0
lockfspl 48 139 0 138 1 0 1 1 0 8 0
sessionpl 144 19 0 8 1 0 1 1 0 8 0
pgrppl 48 19 0 8 1 0 1 1 0 8 0
ucredpl 96 1137 0 1128 1 0 1 1 0 8 0
zombiepl 144 4264 0 4264 1 0 1 1 0 8 1
processpl 1080 4298 0 4264 3 0 3 3 0 8 0
procpl 672 9122 0 9079 5 1 4 5 0 8 0
sosppl 168 5 0 5 1 1 0 1 0 8 0
sockpl 432 2301 0 2249 16 9 7 8 0 8 0
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl12k 12288 9 0 0 1 0 1 1 0 8 0
mcl9k 9216 7 0 0 1 0 1 1 0 8 0
mcl8k 8192 6 0 0 1 0 1 1 0 8 0
mcl4k 4096 8 0 0 1 0 1 1 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 216 0 0 15 0 15 15 0 8 0
mtagpl 96 199 0 0 5 0 5 5 0 8 0
mbufpl 256 707 0 0 37 0 37 37 0 8 0
bufpl 280 9107 0 2860 447 0 447 447 0 8 0
anonpl 24 331182 0 325019 88 46 42 83 0 186 0
amapchunkpl 152 15470 0 15314 13 6 7 9 0 158 0
amappl16 200 15121 0 14877 51 38 13 37 0 8 0
amappl15 192 1555 0 1553 1 0 1 1 0 8 0
amappl14 184 23 0 19 1 0 1 1 0 8 0
amappl13 176 35 0 34 1 0 1 1 0 8 0
amappl12 168 4 0 1 1 0 1 1 0 8 0
amappl11 160 58 0 41 1 0 1 1 0 8 0
amappl10 152 15 0 11 1 0 1 1 0 8 0
amappl9 144 15 0 15 1 1 0 1 0 8 0
amappl8 136 4273 0 4209 3 0 3 3 0 8 0
amappl7 128 262 0 250 1 0 1 1 0 8 0
amappl6 120 72 0 58 1 0 1 1 0 8 0
amappl5 112 4972 0 4951 1 0 1 1 0 8 0
amappl4 104 314 0 283 1 0 1 1 0 8 0
amappl3 96 177 0 169 1 0 1 1 0 8 0
amappl2 88 33333 0 33259 3 1 2 3 0 8 0
amappl1 80 127455 0 126972 28 16 12 21 0 8 0
amappl 88 9401 0 9349 2 0 2 2 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 37 0 0 1 0 1 1 0 8 0
uaddrrnd 24 4281 0 4264 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 4281 0 4264 1 0 1 1 0 8 0
vmmpekpl 168 21332 0 21304 2 0 2 2 0 8 0
vmmpepl 168 535706 0 534151 120 49 71 89 0 357 2
vmsppl 368 4280 0 4264 2 0 2 2 0 8 0
rwobjpl 56 112504 0 111546 39 24 15 21 0 8 1
pdppl 4096 8569 0 8528 57 16 41 45 0 8 0
pvpl 32 1516476 0 1507137 197 112 85 141 0 265 0
pmappl 232 4280 0 4264 2 1 1 2 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 342 0 37 9 0 9 9 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:398
witness_checkorder(ffffffff82728380,9,0) at witness_checkorder+0x108b
rw_enter_write(ffffffff82728370) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128
uvn_get(fffffd80668957b0,0,ffff8000242e6c58,ffff8000242e6c3c,0,1) at uvn_get+0xeb uvm_vnode_lock sys/uvm/uvm_vnode.c:1501 [inline]
uvn_get(fffffd80668957b0,0,ffff8000242e6c58,ffff8000242e6c3c,0,1) at uvn_get+0xeb sys/uvm/uvm_vnode.c:993
uvm_fault_lower(ffff8000242e6dc0,ffff8000242e6df8,ffff8000242e6cc0,0) at uvm_fault_lower+0x5e7 sys/uvm/uvm_fault.c:1146
uvm_fault(fffffd807eff98a0,20000000,0,1) at uvm_fault+0x17c sys/uvm/uvm_fault.c:977
kpageflttrap(ffff8000242e6f50,20000000) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265
kerntrap(ffff8000242e6f50) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyin() at copyin+0x53
sys_connect(ffff80002123c000,ffff8000242e7118,ffff8000242e7160) at sys_connect+0x9b sys/kern/uipc_syscalls.c:362
syscall(ffff8000242e71e0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000242e71e0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2fe88703ab0, count: -13
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
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(ffffffff828bf3f8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff828bf3f8) at __mp_lock+0x122 sys/kern/kern_lock.c:147
sleep_setup(ffff8000222b9078,ffffffff8277bc20,120,ffffffff823a035a) at sleep_setup+0xc7 sys/kern/kern_synch.c:382
tsleep(ffffffff8277bc20,120,ffffffff823a035a,2) at tsleep+0x113 sleep_setup_timeout sys/kern/kern_synch.c:444 [inline]
tsleep(ffffffff8277bc20,120,ffffffff823a035a,2) at tsleep+0x113 sys/kern/kern_synch.c:159
sys_nanosleep(ffff80002123c2a0,ffff8000222b91a0,ffff8000222b91f0) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297
syscall(ffff8000222b9270) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000222b9270) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd4270, count: -9
---
This report is generated by a bot. It may contain errors.
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syzbot
May 25, 2021, 12:20:12 AM5/25/21
to syzkaller-o...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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