uvm_fault: uvmfault_anonget
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syzbot
May 31, 2020, 9:33:19 AM5/31/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: e075d9d3 match on pci id for azalia device with wrong subc..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12170d16100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=91e73beabfe2c8de5a09
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+91e73b...@syzkaller.appspotmail.com
uvm_fault(0xffffffff82639870, 0xfffffd0000000048, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at uvmfault_anonget+0x89: movl 0x48(%r13),%ebx
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
kernel page fault
uvm_fault(0xffffffff82639870, 0xfffffd0000000048, 0, 1) -> e
uvmfault_anonget(ffff800020f49bd8,fffffd806940fac0,fffffd80694a1000) at uvmfault_anonget+0x89 sys/uvm/uvm_fault.c:287
end trace frame: 0xffff800020f49c80, count: 0
ddb{0}> trace
uvmfault_anonget(ffff800020f49bd8,fffffd806940fac0,fffffd80694a1000) at uvmfault_anonget+0x89 sys/uvm/uvm_fault.c:287
uvm_fault(fffffd806e95bb88,c0022fe000,1,2) at uvm_fault+0x88a sys/uvm/uvm_fault.c:842
pageflttrap(ffff800020f49d70,1) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
usertrap(ffff800020f49d70) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:384
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0xc00042ad98, count: -5
ddb{0}> show registers
rdi 0xffff800020f49bd8
rsi 0xfffffd806940fac0
rbp 0xffff800020f49a40
rbx 0x1
rdx 0xfffffd80694a1000
rcx 0xffff800020e6c008
rax 0
r8 0xffffffff8132263f pmap_extract+0x12f
r9 0x1
r10 0x2
r11 0xacd7bd619681d786
r12 0xffff800020f49bd8
r13 0xfffffd0000000000
r14 0x3
r15 0xfffffd80694a1000
rip 0xffffffff81dcb1b9 uvmfault_anonget+0x89
cs 0x8
rflags 0x10286 __ALIGN_SIZE+0xf286
rsp 0xffff800020f499d0
ss 0
uvmfault_anonget+0x89: movl 0x48(%r13),%ebx
ddb{0}> show proc
PROC (syz-fuzzer) pid=129450 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=4000000<THREAD>
pri=61, usrpri=62, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6cc38,0xffff800020e6d398
process=0xffff800020ec8018 user=0xffff800020f44000, vmspace=0xfffffd806e95bb88
estcpu=12, cpticks=2, pctcpu=0.8
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
26540 246531 37100 0 2 0 syz-executor.1
26540 312510 37100 0 2 0x4000000 syz-executor.1
59991 203493 98305 0 3 0x82 piperd syz-executor.0
17378 190070 0 0 3 0x14200 bored sosplice
37100 289033 98305 0 2 0x482 syz-executor.1
98305 93944 32350 0 3 0x82 kqread syz-fuzzer
98305 19543 32350 0 7 0x4000482 syz-fuzzer
98305 172068 32350 0 3 0x4000082 thrsleep syz-fuzzer
98305 137028 32350 0 3 0x4000082 thrsleep syz-fuzzer
98305 125439 32350 0 3 0x4000082 thrsleep syz-fuzzer
98305 459346 32350 0 3 0x4000082 thrsleep syz-fuzzer
*98305 129450 32350 0 7 0x4000002 syz-fuzzer
98305 46564 32350 0 3 0x4000082 thrsleep syz-fuzzer
98305 351562 32350 0 3 0x4000082 thrsleep syz-fuzzer
98305 147135 32350 0 3 0x4000082 thrsleep syz-fuzzer
32350 452152 73746 0 3 0x10008a pause ksh
73746 218377 84492 0 3 0x92 select sshd
89336 344239 1 0 3 0x100083 ttyin getty
84492 329199 1 0 3 0x80 select sshd
98833 497388 39837 74 3 0x100092 bpf pflogd
39837 461412 1 0 3 0x80 netio pflogd
20128 99336 1373 73 3 0x100090 kqread syslogd
1373 280608 1 0 3 0x100082 netio syslogd
6844 469228 1 77 3 0x100090 poll dhclient
82822 172576 1 0 3 0x80 poll dhclient
188 170551 0 0 3 0x14200 bored smr
62839 284176 0 0 2 0x14200 zerothread
70241 155852 0 0 3 0x14200 aiodoned aiodoned
70503 213848 0 0 3 0x14200 syncer update
72436 274440 0 0 3 0x14200 cleaner cleaner
86265 9676 0 0 3 0x14200 reaper reaper
98028 283821 0 0 3 0x14200 pgdaemon pagedaemon
57135 7299 0 0 3 0x14200 bored crynlk
18293 137852 0 0 3 0x14200 bored crypto
74996 137960 0 0 3 0x40014200 acpi0 acpi0
91855 311271 0 0 3 0x40014200 idle1
8537 189203 0 0 3 0x14200 bored softnet
25449 293497 0 0 3 0x14200 bored systqmp
72670 216469 0 0 3 0x14200 bored systq
64356 192471 0 0 3 0x40014200 bored softclock
85510 507754 0 0 3 0x40014200 idle0
1 440826 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 98305 (syz-fuzzer) thread 0xffff800020e6c008 (129450)
shared rwlock vmmaplk r = 0 (0xfffffd806e95bba0)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448
#2 uvm_fault+0x7f sys/uvm/uvm_fault.c:524
#3 pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
#4 usertrap+0x21a sys/arch/amd64/amd64/trap.c:384
#5 recall_trap+0x8
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82641ae8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180
#2 usertrap+0x21a sys/arch/amd64/amd64/trap.c:384
#3 recall_trap+0x8
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9517 6415K 6931K 78643K 11585 0
pcb 13 8K 8K 78643K 58 0
rtable 112 3K 4K 78643K 287 0
ifaddr 71 13K 14K 78643K 92 0
counters 43 33K 34K 78643K 49 0
ioctlops 0 0K 4K 78643K 1478 0
iov 0 0K 16K 78643K 36 0
mount 1 1K 1K 78643K 1 0
vnodes 1224 77K 77K 78643K 1480 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 9 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 17 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 397 0
proc 62 63K 95K 78643K 533 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 22 0
in_multi 40 2K 2K 78643K 73 0
ether_multi 1 0K 0K 78643K 8 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 31 148K 148K 78643K 31 0
exec 0 0K 1K 78643K 245 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 127 23K 23K 78643K 2220 0
UVM aobj 24 7K 7K 78643K 26 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 36 0
NDP 12 0K 0K 78643K 21 0
temp 100 3034K 3102K 78643K 6568 0
kqueue 3 4K 12K 78643K 13 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
arp 64 10 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 31 0 29 1 0 1 1 0 8 0
rtentry 112 58 0 12 2 0 2 2 0 8 0
unpcb 120 115 0 105 1 0 1 1 0 8 0
syncache 264 9 0 9 2 2 0 1 0 8 0
tcpqe 32 80 0 80 1 1 0 1 0 8 0
tcpcb 544 278 0 274 1 0 1 1 0 8 0
inpcb 280 444 0 435 2 1 1 2 0 8 0
nd6 48 9 0 3 1 0 1 1 0 8 0
pffrag 232 3 0 3 1 1 0 1 0 482 0
pffrnode 88 3 0 3 1 1 0 1 0 8 0
pffrent 40 6 0 6 1 1 0 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 40 0 18 1 0 1 1 0 8 0
pfstkey 112 40 0 18 1 0 1 1 0 8 0
pfstate 328 40 0 18 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 239 0 44 13 0 13 13 0 8 0
art_table 32 240 0 44 2 0 2 2 0 8 0
art_node 16 57 0 15 1 0 1 1 0 8 0
sysvmsgpl 40 7 0 5 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 11 0 1 1 0 1 1 0 8 0
shmpl 112 24 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1888 0 483 90 1 89 89 0 8 0
ffsino 272 1888 0 483 94 0 94 94 0 8 0
nchpl 144 2642 0 1048 60 0 60 60 0 8 0
uvmvnodes 72 2167 0 0 40 0 40 40 0 8 0
vnodes 208 2167 0 0 115 0 115 115 0 8 0
namei 1024 7334 0 7334 2 1 1 1 0 8 1
percpumem 16 35 0 3 1 0 1 1 0 8 0
vmpool 560 1 0 1 1 0 1 1 0 8 1
scxspl 192 7022 0 7022 8 7 1 7 0 8 1
plimitpl 152 28 0 20 1 0 1 1 0 8 0
sigapl 424 610 0 578 4 0 4 4 0 8 0
futexpl 56 5343 0 5343 2 1 1 1 0 8 1
knotepl 112 85 0 66 1 0 1 1 0 8 0
kqueuepl 144 202 0 200 1 0 1 1 0 8 0
pipelkpl 48 102 0 92 1 0 1 1 0 8 0
pipepl 120 204 0 185 1 0 1 1 0 8 0
fdescpl 496 594 0 578 3 0 3 3 0 8 0
filepl 152 3004 0 2904 6 1 5 6 0 8 1
lockfpl 104 58 0 57 1 0 1 1 0 8 0
lockfspl 48 24 0 23 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 19 0 8 1 0 1 1 0 8 0
ucredpl 96 332 0 323 1 0 1 1 0 8 0
zombiepl 144 578 0 578 1 0 1 1 0 8 1
processpl 984 610 0 578 5 0 5 5 0 8 0
procpl 624 1396 0 1354 4 0 4 4 0 8 0
sosppl 128 2 0 2 1 0 1 1 0 8 1
sockpl 400 612 0 593 7 4 3 6 0 8 1
mcl64k 65536 10 0 0 2 0 2 2 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 9 0 0 2 0 2 2 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 159 0 0 19 0 19 19 0 8 0
mtagpl 80 22 0 0 1 0 1 1 0 8 0
mbufpl 256 195 0 0 11 0 11 11 0 8 0
bufpl 280 4665 0 133 324 0 324 324 0 8 0
anonpl 16 63070 0 51459 69 6 63 67 0 124 1
amapchunkpl 152 3167 0 3037 8 1 7 8 0 158 0
amappl16 192 2487 0 1655 47 3 44 45 0 8 2
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 37 0 31 1 0 1 1 0 8 0
amappl13 168 46 0 41 1 0 1 1 0 8 0
amappl12 160 7 0 4 1 0 1 1 0 8 0
amappl11 152 55 0 40 1 0 1 1 0 8 0
amappl10 144 178 0 173 1 0 1 1 0 8 0
amappl9 136 568 0 567 1 0 1 1 0 8 0
amappl8 128 558 0 521 2 0 2 2 0 8 0
amappl7 120 291 0 277 1 0 1 1 0 8 0
amappl6 112 33 0 23 1 0 1 1 0 8 0
amappl5 104 490 0 474 1 0 1 1 0 8 0
amappl4 96 513 0 481 1 0 1 1 0 8 0
amappl3 88 108 0 103 1 0 1 1 0 8 0
amappl2 80 3712 0 3636 2 0 2 2 0 8 0
amappl1 72 22645 0 22201 23 13 10 18 0 8 0
amappl 80 1664 0 1622 2 0 2 2 0 84 0
dma4096 4096 1 0 1 1 1 0 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 25 0 2 1 0 1 1 0 8 0
uaddrrnd 24 595 0 579 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 595 0 579 1 0 1 1 0 8 0
vmmpekpl 168 8098 0 8064 2 0 2 2 0 8 0
vmmpepl 168 78624 0 76619 139 18 121 121 0 357 29
vmsppl 368 594 0 579 2 0 2 2 0 8 0
pdppl 4096 1198 0 1158 6 0 6 6 0 8 0
pvpl 32 206846 0 192100 167 12 155 167 0 265 6
pmappl 232 594 0 579 2 1 1 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 263 0 9 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
uvmfault_anonget(ffff800020f49bd8,fffffd806940fac0,fffffd80694a1000) at uvmfault_anonget+0x89 sys/uvm/uvm_fault.c:287
uvm_fault(fffffd806e95bb88,c0022fe000,1,2) at uvm_fault+0x88a sys/uvm/uvm_fault.c:842
pageflttrap(ffff800020f49d70,1) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
usertrap(ffff800020f49d70) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:384
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0xc00042ad98, count: -5
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__sanitizer_cov_trace_cmp4(966e6,966e7) at __sanitizer_cov_trace_cmp4+0x5d kd_curproc sys/dev/kcov.c:416 [inline]
__sanitizer_cov_trace_cmp4(966e6,966e7) at __sanitizer_cov_trace_cmp4+0x5d trace_cmp sys/dev/kcov.c:104 [inline]
__sanitizer_cov_trace_cmp4(966e6,966e7) at __sanitizer_cov_trace_cmp4+0x5d sys/dev/kcov.c:135
__mp_lock(ffffffff826418e0) at __mp_lock+0x139 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff826418e0) at __mp_lock+0x139 sys/kern/kern_lock.c:147
__mp_acquire_count(ffffffff826418e0,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435
sleep_finish(ffff800020f18d80,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418
sleep_finish_all(ffff800020f18d80,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
sleep_finish_all(ffff800020f18d80,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393
tsleep(ffffffff825e82d0,120,ffffffff821f1999,2) at tsleep+0x1cc sys/kern/kern_synch.c:155
sys_nanosleep(ffff800020ed0760,ffff800020f18eb0,ffff800020f18f00) at sys_nanosleep+0x205 sys/kern/kern_time.c:297
syscall(ffff800020f18f80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020f18f80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc00004ff38, count: -13
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: e075d9d3 match on pci id for azalia device with wrong subc..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12170d16100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=91e73beabfe2c8de5a09
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+91e73b...@syzkaller.appspotmail.com
uvm_fault(0xffffffff82639870, 0xfffffd0000000048, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at uvmfault_anonget+0x89: movl 0x48(%r13),%ebx
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
kernel page fault
uvm_fault(0xffffffff82639870, 0xfffffd0000000048, 0, 1) -> e
uvmfault_anonget(ffff800020f49bd8,fffffd806940fac0,fffffd80694a1000) at uvmfault_anonget+0x89 sys/uvm/uvm_fault.c:287
end trace frame: 0xffff800020f49c80, count: 0
ddb{0}> trace
uvmfault_anonget(ffff800020f49bd8,fffffd806940fac0,fffffd80694a1000) at uvmfault_anonget+0x89 sys/uvm/uvm_fault.c:287
uvm_fault(fffffd806e95bb88,c0022fe000,1,2) at uvm_fault+0x88a sys/uvm/uvm_fault.c:842
pageflttrap(ffff800020f49d70,1) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
usertrap(ffff800020f49d70) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:384
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0xc00042ad98, count: -5
ddb{0}> show registers
rdi 0xffff800020f49bd8
rsi 0xfffffd806940fac0
rbp 0xffff800020f49a40
rbx 0x1
rdx 0xfffffd80694a1000
rcx 0xffff800020e6c008
rax 0
r8 0xffffffff8132263f pmap_extract+0x12f
r9 0x1
r10 0x2
r11 0xacd7bd619681d786
r12 0xffff800020f49bd8
r13 0xfffffd0000000000
r14 0x3
r15 0xfffffd80694a1000
rip 0xffffffff81dcb1b9 uvmfault_anonget+0x89
cs 0x8
rflags 0x10286 __ALIGN_SIZE+0xf286
rsp 0xffff800020f499d0
ss 0
uvmfault_anonget+0x89: movl 0x48(%r13),%ebx
ddb{0}> show proc
PROC (syz-fuzzer) pid=129450 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=4000000<THREAD>
pri=61, usrpri=62, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6cc38,0xffff800020e6d398
process=0xffff800020ec8018 user=0xffff800020f44000, vmspace=0xfffffd806e95bb88
estcpu=12, cpticks=2, pctcpu=0.8
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
26540 246531 37100 0 2 0 syz-executor.1
26540 312510 37100 0 2 0x4000000 syz-executor.1
59991 203493 98305 0 3 0x82 piperd syz-executor.0
17378 190070 0 0 3 0x14200 bored sosplice
37100 289033 98305 0 2 0x482 syz-executor.1
98305 93944 32350 0 3 0x82 kqread syz-fuzzer
98305 19543 32350 0 7 0x4000482 syz-fuzzer
98305 172068 32350 0 3 0x4000082 thrsleep syz-fuzzer
98305 137028 32350 0 3 0x4000082 thrsleep syz-fuzzer
98305 125439 32350 0 3 0x4000082 thrsleep syz-fuzzer
98305 459346 32350 0 3 0x4000082 thrsleep syz-fuzzer
*98305 129450 32350 0 7 0x4000002 syz-fuzzer
98305 46564 32350 0 3 0x4000082 thrsleep syz-fuzzer
98305 351562 32350 0 3 0x4000082 thrsleep syz-fuzzer
98305 147135 32350 0 3 0x4000082 thrsleep syz-fuzzer
32350 452152 73746 0 3 0x10008a pause ksh
73746 218377 84492 0 3 0x92 select sshd
89336 344239 1 0 3 0x100083 ttyin getty
84492 329199 1 0 3 0x80 select sshd
98833 497388 39837 74 3 0x100092 bpf pflogd
39837 461412 1 0 3 0x80 netio pflogd
20128 99336 1373 73 3 0x100090 kqread syslogd
1373 280608 1 0 3 0x100082 netio syslogd
6844 469228 1 77 3 0x100090 poll dhclient
82822 172576 1 0 3 0x80 poll dhclient
188 170551 0 0 3 0x14200 bored smr
62839 284176 0 0 2 0x14200 zerothread
70241 155852 0 0 3 0x14200 aiodoned aiodoned
70503 213848 0 0 3 0x14200 syncer update
72436 274440 0 0 3 0x14200 cleaner cleaner
86265 9676 0 0 3 0x14200 reaper reaper
98028 283821 0 0 3 0x14200 pgdaemon pagedaemon
57135 7299 0 0 3 0x14200 bored crynlk
18293 137852 0 0 3 0x14200 bored crypto
74996 137960 0 0 3 0x40014200 acpi0 acpi0
91855 311271 0 0 3 0x40014200 idle1
8537 189203 0 0 3 0x14200 bored softnet
25449 293497 0 0 3 0x14200 bored systqmp
72670 216469 0 0 3 0x14200 bored systq
64356 192471 0 0 3 0x40014200 bored softclock
85510 507754 0 0 3 0x40014200 idle0
1 440826 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 98305 (syz-fuzzer) thread 0xffff800020e6c008 (129450)
shared rwlock vmmaplk r = 0 (0xfffffd806e95bba0)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448
#2 uvm_fault+0x7f sys/uvm/uvm_fault.c:524
#3 pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
#4 usertrap+0x21a sys/arch/amd64/amd64/trap.c:384
#5 recall_trap+0x8
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82641ae8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180
#2 usertrap+0x21a sys/arch/amd64/amd64/trap.c:384
#3 recall_trap+0x8
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9517 6415K 6931K 78643K 11585 0
pcb 13 8K 8K 78643K 58 0
rtable 112 3K 4K 78643K 287 0
ifaddr 71 13K 14K 78643K 92 0
counters 43 33K 34K 78643K 49 0
ioctlops 0 0K 4K 78643K 1478 0
iov 0 0K 16K 78643K 36 0
mount 1 1K 1K 78643K 1 0
vnodes 1224 77K 77K 78643K 1480 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 9 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 17 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 397 0
proc 62 63K 95K 78643K 533 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 22 0
in_multi 40 2K 2K 78643K 73 0
ether_multi 1 0K 0K 78643K 8 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 31 148K 148K 78643K 31 0
exec 0 0K 1K 78643K 245 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 127 23K 23K 78643K 2220 0
UVM aobj 24 7K 7K 78643K 26 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 36 0
NDP 12 0K 0K 78643K 21 0
temp 100 3034K 3102K 78643K 6568 0
kqueue 3 4K 12K 78643K 13 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
arp 64 10 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 31 0 29 1 0 1 1 0 8 0
rtentry 112 58 0 12 2 0 2 2 0 8 0
unpcb 120 115 0 105 1 0 1 1 0 8 0
syncache 264 9 0 9 2 2 0 1 0 8 0
tcpqe 32 80 0 80 1 1 0 1 0 8 0
tcpcb 544 278 0 274 1 0 1 1 0 8 0
inpcb 280 444 0 435 2 1 1 2 0 8 0
nd6 48 9 0 3 1 0 1 1 0 8 0
pffrag 232 3 0 3 1 1 0 1 0 482 0
pffrnode 88 3 0 3 1 1 0 1 0 8 0
pffrent 40 6 0 6 1 1 0 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 40 0 18 1 0 1 1 0 8 0
pfstkey 112 40 0 18 1 0 1 1 0 8 0
pfstate 328 40 0 18 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 239 0 44 13 0 13 13 0 8 0
art_table 32 240 0 44 2 0 2 2 0 8 0
art_node 16 57 0 15 1 0 1 1 0 8 0
sysvmsgpl 40 7 0 5 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 11 0 1 1 0 1 1 0 8 0
shmpl 112 24 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1888 0 483 90 1 89 89 0 8 0
ffsino 272 1888 0 483 94 0 94 94 0 8 0
nchpl 144 2642 0 1048 60 0 60 60 0 8 0
uvmvnodes 72 2167 0 0 40 0 40 40 0 8 0
vnodes 208 2167 0 0 115 0 115 115 0 8 0
namei 1024 7334 0 7334 2 1 1 1 0 8 1
percpumem 16 35 0 3 1 0 1 1 0 8 0
vmpool 560 1 0 1 1 0 1 1 0 8 1
scxspl 192 7022 0 7022 8 7 1 7 0 8 1
plimitpl 152 28 0 20 1 0 1 1 0 8 0
sigapl 424 610 0 578 4 0 4 4 0 8 0
futexpl 56 5343 0 5343 2 1 1 1 0 8 1
knotepl 112 85 0 66 1 0 1 1 0 8 0
kqueuepl 144 202 0 200 1 0 1 1 0 8 0
pipelkpl 48 102 0 92 1 0 1 1 0 8 0
pipepl 120 204 0 185 1 0 1 1 0 8 0
fdescpl 496 594 0 578 3 0 3 3 0 8 0
filepl 152 3004 0 2904 6 1 5 6 0 8 1
lockfpl 104 58 0 57 1 0 1 1 0 8 0
lockfspl 48 24 0 23 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 19 0 8 1 0 1 1 0 8 0
ucredpl 96 332 0 323 1 0 1 1 0 8 0
zombiepl 144 578 0 578 1 0 1 1 0 8 1
processpl 984 610 0 578 5 0 5 5 0 8 0
procpl 624 1396 0 1354 4 0 4 4 0 8 0
sosppl 128 2 0 2 1 0 1 1 0 8 1
sockpl 400 612 0 593 7 4 3 6 0 8 1
mcl64k 65536 10 0 0 2 0 2 2 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 9 0 0 2 0 2 2 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 159 0 0 19 0 19 19 0 8 0
mtagpl 80 22 0 0 1 0 1 1 0 8 0
mbufpl 256 195 0 0 11 0 11 11 0 8 0
bufpl 280 4665 0 133 324 0 324 324 0 8 0
anonpl 16 63070 0 51459 69 6 63 67 0 124 1
amapchunkpl 152 3167 0 3037 8 1 7 8 0 158 0
amappl16 192 2487 0 1655 47 3 44 45 0 8 2
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 37 0 31 1 0 1 1 0 8 0
amappl13 168 46 0 41 1 0 1 1 0 8 0
amappl12 160 7 0 4 1 0 1 1 0 8 0
amappl11 152 55 0 40 1 0 1 1 0 8 0
amappl10 144 178 0 173 1 0 1 1 0 8 0
amappl9 136 568 0 567 1 0 1 1 0 8 0
amappl8 128 558 0 521 2 0 2 2 0 8 0
amappl7 120 291 0 277 1 0 1 1 0 8 0
amappl6 112 33 0 23 1 0 1 1 0 8 0
amappl5 104 490 0 474 1 0 1 1 0 8 0
amappl4 96 513 0 481 1 0 1 1 0 8 0
amappl3 88 108 0 103 1 0 1 1 0 8 0
amappl2 80 3712 0 3636 2 0 2 2 0 8 0
amappl1 72 22645 0 22201 23 13 10 18 0 8 0
amappl 80 1664 0 1622 2 0 2 2 0 84 0
dma4096 4096 1 0 1 1 1 0 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 25 0 2 1 0 1 1 0 8 0
uaddrrnd 24 595 0 579 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 595 0 579 1 0 1 1 0 8 0
vmmpekpl 168 8098 0 8064 2 0 2 2 0 8 0
vmmpepl 168 78624 0 76619 139 18 121 121 0 357 29
vmsppl 368 594 0 579 2 0 2 2 0 8 0
pdppl 4096 1198 0 1158 6 0 6 6 0 8 0
pvpl 32 206846 0 192100 167 12 155 167 0 265 6
pmappl 232 594 0 579 2 1 1 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 263 0 9 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
uvmfault_anonget(ffff800020f49bd8,fffffd806940fac0,fffffd80694a1000) at uvmfault_anonget+0x89 sys/uvm/uvm_fault.c:287
uvm_fault(fffffd806e95bb88,c0022fe000,1,2) at uvm_fault+0x88a sys/uvm/uvm_fault.c:842
pageflttrap(ffff800020f49d70,1) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
usertrap(ffff800020f49d70) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:384
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0xc00042ad98, count: -5
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__sanitizer_cov_trace_cmp4(966e6,966e7) at __sanitizer_cov_trace_cmp4+0x5d kd_curproc sys/dev/kcov.c:416 [inline]
__sanitizer_cov_trace_cmp4(966e6,966e7) at __sanitizer_cov_trace_cmp4+0x5d trace_cmp sys/dev/kcov.c:104 [inline]
__sanitizer_cov_trace_cmp4(966e6,966e7) at __sanitizer_cov_trace_cmp4+0x5d sys/dev/kcov.c:135
__mp_lock(ffffffff826418e0) at __mp_lock+0x139 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff826418e0) at __mp_lock+0x139 sys/kern/kern_lock.c:147
__mp_acquire_count(ffffffff826418e0,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435
sleep_finish(ffff800020f18d80,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418
sleep_finish_all(ffff800020f18d80,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
sleep_finish_all(ffff800020f18d80,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393
tsleep(ffffffff825e82d0,120,ffffffff821f1999,2) at tsleep+0x1cc sys/kern/kern_synch.c:155
sys_nanosleep(ffff800020ed0760,ffff800020f18eb0,ffff800020f18f00) at sys_nanosleep+0x205 sys/kern/kern_time.c:297
syscall(ffff800020f18f80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020f18f80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc00004ff38, count: -13
---
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syzbot
Aug 29, 2020, 9:32:18 AM8/29/20
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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