uvm_fault: x86_ipi_db
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syzbot
Jan 1, 2021, 8:49:21 AM1/1/21
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: caf1a96f Add a -C flag to run-shell to use a tmux command ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12739e57500000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=08691558462bc8642cd3
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+086915...@syzkaller.appspotmail.com
uvm_fault(fffffd8068a81020,20ff8000,2,3) at uvm_fault+0x176 sys/uvm/uvm_fault.c:946
uvm_fault_wire(fffffd8068a81020,20ff8000,20ffb000,3) at uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1385
uvm_map_pageable_wire(fffffd8068a81020,fffffd80657353f0,fffffd80647510c0,dfe,ffffffff8115ffce,0) at uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367
sys_mlock(ffff800021cbf260,ffff800021d6bab8,ffff800021d6bb00) at sys_mlock+0x180 sys/uvm/uvm_mmap.c:772
syscall(ffff800021d6bb80) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021d6bb80) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe6d7a84e040, count: -14
ddb{0}> show registers
rdi 0x3
rsi 0x40000 acpi_pdirpa+0x2be68
rbp 0xffff800021d6b350
rbx 0x3
rdx 0xffff800000b9ad40
rcx 0x3
rax 0x3ffff acpi_pdirpa+0x2be67
r8 0xffffffff8115dc5f witness_checkorder+0x101f
r9 0x5
r10 0xbaab3577d0bcf8c4
r11 0x14b78d9eb7a9fdbb
r12 0xffffffff82856210 w_lodata+0x54220
r13 0xfffffd8068a880a8
r14 0xffffffff8283ff50 w_lodata+0x3df60
r15 0xfffffd8002cd4540
rip 0xffffffff81ff2368 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021d6b340
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.1) pid=380085 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800021cbe7e0,0xffffffff829180a0
process=0xffff800021d14ca8 user=0xffff800021d66000, vmspace=0xfffffd8068a81020
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
16206 478397 74106 0 2 0 syz-executor.1
16206 46643 74106 0 3 0x4000000 biowait syz-executor.1
*16206 380085 74106 0 7 0x4000000 syz-executor.1
86228 197966 33493 0 3 0x2 biowait syz-executor.0
74106 345706 33493 0 3 0x82 nanoslp syz-executor.1
90090 154238 0 0 3 0x14280 nfsidl nfsio
80768 76056 0 0 3 0x14280 nfsidl nfsio
49358 489983 0 0 3 0x14280 nfsidl nfsio
93323 509724 0 0 3 0x14280 nfsidl nfsio
63372 500192 0 0 3 0x14280 nfsidl nfsio
89891 212305 0 0 3 0x14280 nfsidl nfsio
8947 8494 0 0 3 0x14280 nfsidl nfsio
10142 267138 0 0 3 0x14280 nfsidl nfsio
25209 242560 0 0 3 0x14280 nfsidl nfsio
61078 493303 0 0 3 0x14280 nfsidl nfsio
54804 76487 0 0 3 0x14280 nfsidl nfsio
51458 105754 0 0 3 0x14280 nfsidl nfsio
46399 243054 0 0 3 0x14280 nfsidl nfsio
59534 284456 0 0 3 0x14280 nfsidl nfsio
49895 353408 0 0 3 0x14280 nfsidl nfsio
80403 231255 0 0 3 0x14280 nfsidl nfsio
89299 438712 0 0 3 0x14280 nfsidl nfsio
60493 216138 0 0 3 0x14280 nfsidl nfsio
90319 205689 0 0 3 0x14280 nfsidl nfsio
65617 279614 0 0 3 0x14280 nfsidl nfsio
14915 376287 0 0 3 0x14200 bored sosplice
33493 337337 23163 0 3 0x82 thrsleep syz-fuzzer
33493 395543 23163 0 3 0x4000082 nanoslp syz-fuzzer
33493 387849 23163 0 3 0x4000082 thrsleep syz-fuzzer
33493 234040 23163 0 3 0x4000082 kqread syz-fuzzer
33493 353455 23163 0 3 0x4000082 nanoslp syz-fuzzer
33493 23482 23163 0 3 0x4000082 thrsleep syz-fuzzer
33493 158574 23163 0 3 0x4000082 thrsleep syz-fuzzer
33493 330991 23163 0 3 0x4000082 thrsleep syz-fuzzer
23163 483492 41302 0 3 0x10008a sigsusp ksh
41302 70599 84988 0 3 0x92 kqread sshd
10936 399166 1 0 3 0x100083 ttyin getty
84988 458266 1 0 3 0x80 kqread sshd
4018 519228 63753 74 3 0x100092 bpf pflogd
63753 8300 1 0 3 0x80 netio pflogd
4908 182074 94313 73 3 0x100090 kqread syslogd
94313 356332 1 0 3 0x100082 netio syslogd
82003 127170 1 77 3 0x100090 poll dhclient
82771 228908 1 0 3 0x80 poll dhclient
42322 281088 0 0 3 0x14200 bored smr
13749 22148 0 0 2 0x14200 zerothread
66746 228504 0 0 3 0x14200 aiodoned aiodoned
94781 351002 0 0 3 0x14200 syncer update
61850 399503 0 0 3 0x14200 cleaner cleaner
60822 460535 0 0 3 0x14200 reaper reaper
13301 349047 0 0 3 0x14200 pgdaemon pagedaemon
6992 197204 0 0 3 0x14200 bored crynlk
30210 237023 0 0 3 0x14200 bored crypto
7881 390019 0 0 3 0x14200 bored viomb
37560 46342 0 0 3 0x40014200 acpi0 acpi0
83073 516512 0 0 7 0x40014200 idle1
45172 130395 0 0 3 0x14200 bored softnet
33983 521195 0 0 3 0x14200 bored systqmp
35040 335811 0 0 3 0x14200 bored systq
10966 406451 0 0 3 0x40014200 bored softclock
78789 445432 0 0 3 0x40014200 idle0
1 109886 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 16206 (syz-executor.1) thread 0xffff800021cbe7e0 (46643)
exclusive rrwlock inode r = 0 (0xfffffd8068a880a8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#1 rw_enter+0x446 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
#4 vn_lock+0x6c sys/kern/vfs_vnops.c:575
#5 vn_write+0x11a sys/kern/vfs_vnops.c:411
#6 dofilewritev+0x1ab sys/kern/sys_generic.c:379
#7 sys_pwritev+0xb8 sys/kern/vfs_syscalls.c:3351
#8 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#9 Xsyscall+0x128
Process 16206 (syz-executor.1) thread 0xffff800021cbf260 (380085)
shared rwlock vmmaplk r = 0 (0xfffffd8068a81038)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#1 rw_enter+0x446 sys/kern/kern_rwlock.c:311
#2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5463
#3 uvm_map_pageable+0x120 sys/uvm/uvm_map.c:2463
#4 sys_mlock+0x180 sys/uvm/uvm_mmap.c:772
#5 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#6 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828c38a0)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#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
Process 86228 (syz-executor.0) thread 0xffff800021cbfa40 (197966)
exclusive rrwlock inode r = 0 (0xfffffd8068a88e78)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#1 rw_enter+0x446 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
#4 vn_lock+0x6c sys/kern/vfs_vnops.c:575
#5 vget+0x1c6 sys/kern/vfs_subr.c:671
#6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x6b sys/ufs/ffs/ffs_vfsops.c:1321
#8 ufs_lookup+0x151d sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#10 vfs_lookup+0x708 sys/kern/vfs_lookup.c:568
#11 namei+0x5f7 sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848
#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 rrwlock inode r = 0 (0xfffffd8068a88928)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#1 rw_enter+0x446 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
#4 vn_lock+0x6c sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x5f7 sys/kern/vfs_lookup.c:249
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848
#8 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#9 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9585 6464K 7341K 78643K 87274 0
pcb 13 8K 8K 78643K 337 0
rtable 102 12K 13K 78643K 1507 0
ifaddr 103 19K 19K 78643K 423 0
sysctl 2 0K 1K 78643K 4 0
counters 44 34K 34K 78643K 144 0
ioctlops 0 0K 4K 78643K 1899 0
iov 0 0K 16K 78643K 269 0
mount 1 1K 1K 78643K 1 0
vnodes 1218 77K 77K 78643K 72186 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 26 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 381 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 5 13K 25K 78643K 84329 0
sigio 0 0K 0K 78643K 82 0
proc 63 63K 95K 78643K 1103 0
subproc 32 2K 2K 78643K 204 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 581 0
in_multi 33 2K 2K 78643K 463 0
ether_multi 1 0K 0K 78643K 76 0
mrt 0 0K 0K 78643K 18 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 73 334K 334K 78643K 73 0
exec 0 0K 2K 78643K 837 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 374 333K 333K 78643K 223537 0
UVM aobj 55 7K 7K 78643K 66 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 234 0
NDP 19 0K 0K 78643K 111 0
temp 166 3995K 4059K 78643K 288201 0
kqueue 6 9K 17K 78643K 269 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 35 0 29 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 120 272 0 270 1 0 1 1 0 8 0
rtentry 112 258 0 222 2 0 2 2 0 8 0
unpcb 120 5382 0 5359 4 3 1 2 0 8 0
syncache 296 49 0 49 9 9 0 1 0 8 0
tcpqe 32 192 0 192 9 9 0 1 0 8 0
tcpcb 736 891 0 887 22 21 1 5 0 8 0
inpcb 296 2880 0 2873 15 14 1 2 0 8 0
rttmr 72 1 0 1 1 1 0 1 0 8 0
nd6 48 56 0 50 1 0 1 1 0 8 0
pkpcb 40 42 0 42 7 7 0 1 0 8 0
kcovpl 48 12 0 10 1 0 1 1 0 8 0
swfcl 56 2 0 0 1 0 1 1 0 8 0
ppxss 1128 5 0 5 2 2 0 1 0 8 0
pffrag 232 38 0 38 3 3 0 1 0 482 0
pffrnode 88 38 0 38 3 3 0 1 0 8 0
pffrent 40 434 0 434 4 4 0 1 0 8 0
pfosfp 40 1460 0 1456 6 5 1 5 0 8 0
pfosfpen 112 1460 0 1428 22 21 1 21 0 8 0
pfrktable 1344 97 0 95 1 0 1 1 0 8 0
pftag 88 4 0 0 1 0 1 1 0 8 0
pfqueue 264 14 0 14 1 1 0 1 0 8 0
pfstitem 24 178 0 176 1 0 1 1 0 8 0
pfstkey 112 178 0 176 3 2 1 3 0 8 0
pfstate 328 178 0 176 9 8 1 6 0 8 0
pfrule 1360 195 0 145 6 1 5 5 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1155 0 975 15 3 12 13 0 8 0
art_table 32 1156 0 975 2 0 2 2 0 8 0
art_node 16 255 0 225 1 0 1 1 0 8 0
sysvmsgpl 40 62 0 61 1 0 1 1 0 8 0
semapl 112 379 0 369 1 0 1 1 0 8 0
shmpl 112 63 0 11 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 87133 0 85714 93 3 90 90 0 8 0
ffsino 272 87133 0 85714 96 0 96 96 0 8 0
nchpl 144 172652 0 171057 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 428747 0 428747 1 0 1 1 0 8 1
percpumem 16 83 0 50 1 0 1 1 0 8 0
vcpupl 1984 26 0 0 4 0 4 4 0 8 0
vmpool 560 45 0 19 3 1 2 2 0 8 0
pfiaddrpl 120 30 0 30 4 4 0 1 0 8 0
scsiplug 72 10 0 10 3 3 0 1 0 8 0
scxspl 216 517397 0 517395 9 8 1 8 0 8 0
plimitpl 152 418 0 410 1 0 1 1 0 8 0
sigapl 424 84536 0 84483 7 0 7 7 0 8 1
futexpl 56 467534 0 467534 1 0 1 1 0 8 1
knotepl 112 763108 0 763082 3 2 1 2 0 8 0
kqueuepl 168 4268 0 4263 1 0 1 1 0 8 0
pipepl 336 360 0 349 3 1 2 3 0 8 0
fdescpl 496 84499 0 84483 3 0 3 3 0 8 0
filepl 152 179102 0 178997 8 3 5 7 0 8 0
lockfpl 104 837 0 836 1 0 1 1 0 8 0
lockfspl 48 305 0 304 1 0 1 1 0 8 0
sessionpl 144 28 0 17 1 0 1 1 0 8 0
pgrppl 48 84 0 73 1 0 1 1 0 8 0
ucredpl 96 3713 0 3700 1 0 1 1 0 8 0
zombiepl 144 84483 0 84483 1 0 1 1 0 8 1
processpl 1072 84536 0 84483 4 0 4 4 0 8 0
procpl 672 170020 0 169958 7 1 6 6 0 8 0
sosppl 168 70 0 70 12 12 0 1 0 8 0
sockpl 432 8579 0 8545 15 10 5 6 0 8 0
mcl64k 65536 18 0 0 3 0 3 3 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 5 0 0 1 0 1 1 0 8 0
mcl9k 9216 17 0 0 2 0 2 2 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 12 0 0 2 0 2 2 0 8 0
mcl2k2 2112 5 0 0 1 0 1 1 0 8 0
mcl2k 2048 1382 0 0 25 2 23 24 0 8 1
mtagpl 96 349 0 0 7 0 7 7 0 8 0
mbufpl 256 1618 0 0 46 0 46 46 0 8 0
bufpl 280 89546 0 83297 447 0 447 447 0 8 0
anonpl 16 4898292 0 4883686 108 49 59 59 0 124 0
amapchunkpl 152 261053 0 260782 42 31 11 23 0 158 0
amappl16 192 262359 0 261702 68 34 34 34 0 8 0
amappl15 184 511 0 510 1 0 1 1 0 8 0
amappl14 176 281 0 277 1 0 1 1 0 8 0
amappl13 168 38288 0 38285 1 0 1 1 0 8 0
amappl12 160 13 0 7 1 0 1 1 0 8 0
amappl11 152 98 0 80 1 0 1 1 0 8 0
amappl10 144 2334 0 2330 1 0 1 1 0 8 0
amappl9 136 40937 0 40935 3 2 1 1 0 8 0
amappl8 128 2547 0 2338 7 0 7 7 0 8 0
amappl7 120 41017 0 41008 1 0 1 1 0 8 0
amappl6 112 2435 0 2415 1 0 1 1 0 8 0
amappl5 104 46558 0 46539 1 0 1 1 0 8 0
amappl4 96 605 0 571 1 0 1 1 0 8 0
amappl3 88 76434 0 76424 1 0 1 1 0 8 0
amappl2 80 680700 0 680620 3 0 3 3 0 8 0
amappl1 72 2141878 0 2141389 26 16 10 19 0 8 0
amappl 80 170510 0 170400 3 0 3 3 0 84 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 65 0 11 1 0 1 1 0 8 0
uaddrrnd 24 84544 0 84502 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 84544 0 84502 1 0 1 1 0 8 0
vmmpekpl 168 272623 0 272584 2 0 2 2 0 8 0
vmmpepl 168 10200139 0 10197971 184 85 99 100 0 357 1
vmsppl 368 84543 0 84502 5 1 4 4 0 8 0
pdppl 4096 169095 0 169030 88 21 67 68 0 8 2
pvpl 32 26845421 0 26827568 322 172 150 150 0 265 0
pmappl 232 84543 0 84502 4 1 3 3 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 416 0 55 11 0 11 11 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(fffffd8068a880a8,9,0) at witness_checkorder+0x1049
rw_enter(fffffd8068a88098,81) at rw_enter+0xd4
rrw_enter(fffffd8068a88098,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:462
VOP_LOCK(fffffd806e251970,81) at VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
vn_lock(fffffd806e251970,81) at vn_lock+0x6c sys/kern/vfs_vnops.c:575
uvn_get(fffffd806e252758,0,ffff800021d6b6f8,ffff800021d6b6e4,0,1) at uvn_get+0x276 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline]
uvn_get(fffffd806e252758,0,ffff800021d6b6f8,ffff800021d6b6e4,0,1) at uvn_get+0x276 sys/uvm/uvm_vnode.c:993
uvm_fault_lower(ffff800021d6b898,ffff800021d6b870,ffff800021d6b770,2,3) at uvm_fault_lower+0x6ff sys/uvm/uvm_fault.c:1116
uvm_fault(fffffd8068a81020,20ff8000,2,3) at uvm_fault+0x176 sys/uvm/uvm_fault.c:946
uvm_fault_wire(fffffd8068a81020,20ff8000,20ffb000,3) at uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1385
uvm_map_pageable_wire(fffffd8068a81020,fffffd80657353f0,fffffd80647510c0,dfe,ffffffff8115ffce,0) at uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367
sys_mlock(ffff800021cbf260,ffff800021d6bab8,ffff800021d6bb00) at sys_mlock+0x180 sys/uvm/uvm_mmap.c:772
syscall(ffff800021d6bb80) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021d6bb80) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe6d7a84e040, count: -14
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
acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020d68ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: -5
---
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syzbot found the following issue on:
HEAD commit: caf1a96f Add a -C flag to run-shell to use a tmux command ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12739e57500000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=08691558462bc8642cd3
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+086915...@syzkaller.appspotmail.com
uvm_fault(fffffd8068a81020,20ff8000,2,3) at uvm_fault+0x176 sys/uvm/uvm_fault.c:946
uvm_fault_wire(fffffd8068a81020,20ff8000,20ffb000,3) at uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1385
uvm_map_pageable_wire(fffffd8068a81020,fffffd80657353f0,fffffd80647510c0,dfe,ffffffff8115ffce,0) at uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367
sys_mlock(ffff800021cbf260,ffff800021d6bab8,ffff800021d6bb00) at sys_mlock+0x180 sys/uvm/uvm_mmap.c:772
syscall(ffff800021d6bb80) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021d6bb80) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe6d7a84e040, count: -14
ddb{0}> show registers
rdi 0x3
rsi 0x40000 acpi_pdirpa+0x2be68
rbp 0xffff800021d6b350
rbx 0x3
rdx 0xffff800000b9ad40
rcx 0x3
rax 0x3ffff acpi_pdirpa+0x2be67
r8 0xffffffff8115dc5f witness_checkorder+0x101f
r9 0x5
r10 0xbaab3577d0bcf8c4
r11 0x14b78d9eb7a9fdbb
r12 0xffffffff82856210 w_lodata+0x54220
r13 0xfffffd8068a880a8
r14 0xffffffff8283ff50 w_lodata+0x3df60
r15 0xfffffd8002cd4540
rip 0xffffffff81ff2368 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800021d6b340
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.1) pid=380085 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800021cbe7e0,0xffffffff829180a0
process=0xffff800021d14ca8 user=0xffff800021d66000, vmspace=0xfffffd8068a81020
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
16206 478397 74106 0 2 0 syz-executor.1
16206 46643 74106 0 3 0x4000000 biowait syz-executor.1
*16206 380085 74106 0 7 0x4000000 syz-executor.1
86228 197966 33493 0 3 0x2 biowait syz-executor.0
74106 345706 33493 0 3 0x82 nanoslp syz-executor.1
90090 154238 0 0 3 0x14280 nfsidl nfsio
80768 76056 0 0 3 0x14280 nfsidl nfsio
49358 489983 0 0 3 0x14280 nfsidl nfsio
93323 509724 0 0 3 0x14280 nfsidl nfsio
63372 500192 0 0 3 0x14280 nfsidl nfsio
89891 212305 0 0 3 0x14280 nfsidl nfsio
8947 8494 0 0 3 0x14280 nfsidl nfsio
10142 267138 0 0 3 0x14280 nfsidl nfsio
25209 242560 0 0 3 0x14280 nfsidl nfsio
61078 493303 0 0 3 0x14280 nfsidl nfsio
54804 76487 0 0 3 0x14280 nfsidl nfsio
51458 105754 0 0 3 0x14280 nfsidl nfsio
46399 243054 0 0 3 0x14280 nfsidl nfsio
59534 284456 0 0 3 0x14280 nfsidl nfsio
49895 353408 0 0 3 0x14280 nfsidl nfsio
80403 231255 0 0 3 0x14280 nfsidl nfsio
89299 438712 0 0 3 0x14280 nfsidl nfsio
60493 216138 0 0 3 0x14280 nfsidl nfsio
90319 205689 0 0 3 0x14280 nfsidl nfsio
65617 279614 0 0 3 0x14280 nfsidl nfsio
14915 376287 0 0 3 0x14200 bored sosplice
33493 337337 23163 0 3 0x82 thrsleep syz-fuzzer
33493 395543 23163 0 3 0x4000082 nanoslp syz-fuzzer
33493 387849 23163 0 3 0x4000082 thrsleep syz-fuzzer
33493 234040 23163 0 3 0x4000082 kqread syz-fuzzer
33493 353455 23163 0 3 0x4000082 nanoslp syz-fuzzer
33493 23482 23163 0 3 0x4000082 thrsleep syz-fuzzer
33493 158574 23163 0 3 0x4000082 thrsleep syz-fuzzer
33493 330991 23163 0 3 0x4000082 thrsleep syz-fuzzer
23163 483492 41302 0 3 0x10008a sigsusp ksh
41302 70599 84988 0 3 0x92 kqread sshd
10936 399166 1 0 3 0x100083 ttyin getty
84988 458266 1 0 3 0x80 kqread sshd
4018 519228 63753 74 3 0x100092 bpf pflogd
63753 8300 1 0 3 0x80 netio pflogd
4908 182074 94313 73 3 0x100090 kqread syslogd
94313 356332 1 0 3 0x100082 netio syslogd
82003 127170 1 77 3 0x100090 poll dhclient
82771 228908 1 0 3 0x80 poll dhclient
42322 281088 0 0 3 0x14200 bored smr
13749 22148 0 0 2 0x14200 zerothread
66746 228504 0 0 3 0x14200 aiodoned aiodoned
94781 351002 0 0 3 0x14200 syncer update
61850 399503 0 0 3 0x14200 cleaner cleaner
60822 460535 0 0 3 0x14200 reaper reaper
13301 349047 0 0 3 0x14200 pgdaemon pagedaemon
6992 197204 0 0 3 0x14200 bored crynlk
30210 237023 0 0 3 0x14200 bored crypto
7881 390019 0 0 3 0x14200 bored viomb
37560 46342 0 0 3 0x40014200 acpi0 acpi0
83073 516512 0 0 7 0x40014200 idle1
45172 130395 0 0 3 0x14200 bored softnet
33983 521195 0 0 3 0x14200 bored systqmp
35040 335811 0 0 3 0x14200 bored systq
10966 406451 0 0 3 0x40014200 bored softclock
78789 445432 0 0 3 0x40014200 idle0
1 109886 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 16206 (syz-executor.1) thread 0xffff800021cbe7e0 (46643)
exclusive rrwlock inode r = 0 (0xfffffd8068a880a8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#1 rw_enter+0x446 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
#4 vn_lock+0x6c sys/kern/vfs_vnops.c:575
#5 vn_write+0x11a sys/kern/vfs_vnops.c:411
#6 dofilewritev+0x1ab sys/kern/sys_generic.c:379
#7 sys_pwritev+0xb8 sys/kern/vfs_syscalls.c:3351
#8 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#9 Xsyscall+0x128
Process 16206 (syz-executor.1) thread 0xffff800021cbf260 (380085)
shared rwlock vmmaplk r = 0 (0xfffffd8068a81038)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#1 rw_enter+0x446 sys/kern/kern_rwlock.c:311
#2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5463
#3 uvm_map_pageable+0x120 sys/uvm/uvm_map.c:2463
#4 sys_mlock+0x180 sys/uvm/uvm_mmap.c:772
#5 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#6 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828c38a0)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#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
Process 86228 (syz-executor.0) thread 0xffff800021cbfa40 (197966)
exclusive rrwlock inode r = 0 (0xfffffd8068a88e78)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#1 rw_enter+0x446 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
#4 vn_lock+0x6c sys/kern/vfs_vnops.c:575
#5 vget+0x1c6 sys/kern/vfs_subr.c:671
#6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x6b sys/ufs/ffs/ffs_vfsops.c:1321
#8 ufs_lookup+0x151d sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#10 vfs_lookup+0x708 sys/kern/vfs_lookup.c:568
#11 namei+0x5f7 sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848
#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 rrwlock inode r = 0 (0xfffffd8068a88928)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#1 rw_enter+0x446 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
#4 vn_lock+0x6c sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x5f7 sys/kern/vfs_lookup.c:249
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848
#8 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#9 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9585 6464K 7341K 78643K 87274 0
pcb 13 8K 8K 78643K 337 0
rtable 102 12K 13K 78643K 1507 0
ifaddr 103 19K 19K 78643K 423 0
sysctl 2 0K 1K 78643K 4 0
counters 44 34K 34K 78643K 144 0
ioctlops 0 0K 4K 78643K 1899 0
iov 0 0K 16K 78643K 269 0
mount 1 1K 1K 78643K 1 0
vnodes 1218 77K 77K 78643K 72186 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 26 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 381 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 5 13K 25K 78643K 84329 0
sigio 0 0K 0K 78643K 82 0
proc 63 63K 95K 78643K 1103 0
subproc 32 2K 2K 78643K 204 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 581 0
in_multi 33 2K 2K 78643K 463 0
ether_multi 1 0K 0K 78643K 76 0
mrt 0 0K 0K 78643K 18 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 73 334K 334K 78643K 73 0
exec 0 0K 2K 78643K 837 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 374 333K 333K 78643K 223537 0
UVM aobj 55 7K 7K 78643K 66 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 234 0
NDP 19 0K 0K 78643K 111 0
temp 166 3995K 4059K 78643K 288201 0
kqueue 6 9K 17K 78643K 269 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 35 0 29 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 120 272 0 270 1 0 1 1 0 8 0
rtentry 112 258 0 222 2 0 2 2 0 8 0
unpcb 120 5382 0 5359 4 3 1 2 0 8 0
syncache 296 49 0 49 9 9 0 1 0 8 0
tcpqe 32 192 0 192 9 9 0 1 0 8 0
tcpcb 736 891 0 887 22 21 1 5 0 8 0
inpcb 296 2880 0 2873 15 14 1 2 0 8 0
rttmr 72 1 0 1 1 1 0 1 0 8 0
nd6 48 56 0 50 1 0 1 1 0 8 0
pkpcb 40 42 0 42 7 7 0 1 0 8 0
kcovpl 48 12 0 10 1 0 1 1 0 8 0
swfcl 56 2 0 0 1 0 1 1 0 8 0
ppxss 1128 5 0 5 2 2 0 1 0 8 0
pffrag 232 38 0 38 3 3 0 1 0 482 0
pffrnode 88 38 0 38 3 3 0 1 0 8 0
pffrent 40 434 0 434 4 4 0 1 0 8 0
pfosfp 40 1460 0 1456 6 5 1 5 0 8 0
pfosfpen 112 1460 0 1428 22 21 1 21 0 8 0
pfrktable 1344 97 0 95 1 0 1 1 0 8 0
pftag 88 4 0 0 1 0 1 1 0 8 0
pfqueue 264 14 0 14 1 1 0 1 0 8 0
pfstitem 24 178 0 176 1 0 1 1 0 8 0
pfstkey 112 178 0 176 3 2 1 3 0 8 0
pfstate 328 178 0 176 9 8 1 6 0 8 0
pfrule 1360 195 0 145 6 1 5 5 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1155 0 975 15 3 12 13 0 8 0
art_table 32 1156 0 975 2 0 2 2 0 8 0
art_node 16 255 0 225 1 0 1 1 0 8 0
sysvmsgpl 40 62 0 61 1 0 1 1 0 8 0
semapl 112 379 0 369 1 0 1 1 0 8 0
shmpl 112 63 0 11 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 87133 0 85714 93 3 90 90 0 8 0
ffsino 272 87133 0 85714 96 0 96 96 0 8 0
nchpl 144 172652 0 171057 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 428747 0 428747 1 0 1 1 0 8 1
percpumem 16 83 0 50 1 0 1 1 0 8 0
vcpupl 1984 26 0 0 4 0 4 4 0 8 0
vmpool 560 45 0 19 3 1 2 2 0 8 0
pfiaddrpl 120 30 0 30 4 4 0 1 0 8 0
scsiplug 72 10 0 10 3 3 0 1 0 8 0
scxspl 216 517397 0 517395 9 8 1 8 0 8 0
plimitpl 152 418 0 410 1 0 1 1 0 8 0
sigapl 424 84536 0 84483 7 0 7 7 0 8 1
futexpl 56 467534 0 467534 1 0 1 1 0 8 1
knotepl 112 763108 0 763082 3 2 1 2 0 8 0
kqueuepl 168 4268 0 4263 1 0 1 1 0 8 0
pipepl 336 360 0 349 3 1 2 3 0 8 0
fdescpl 496 84499 0 84483 3 0 3 3 0 8 0
filepl 152 179102 0 178997 8 3 5 7 0 8 0
lockfpl 104 837 0 836 1 0 1 1 0 8 0
lockfspl 48 305 0 304 1 0 1 1 0 8 0
sessionpl 144 28 0 17 1 0 1 1 0 8 0
pgrppl 48 84 0 73 1 0 1 1 0 8 0
ucredpl 96 3713 0 3700 1 0 1 1 0 8 0
zombiepl 144 84483 0 84483 1 0 1 1 0 8 1
processpl 1072 84536 0 84483 4 0 4 4 0 8 0
procpl 672 170020 0 169958 7 1 6 6 0 8 0
sosppl 168 70 0 70 12 12 0 1 0 8 0
sockpl 432 8579 0 8545 15 10 5 6 0 8 0
mcl64k 65536 18 0 0 3 0 3 3 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 5 0 0 1 0 1 1 0 8 0
mcl9k 9216 17 0 0 2 0 2 2 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 12 0 0 2 0 2 2 0 8 0
mcl2k2 2112 5 0 0 1 0 1 1 0 8 0
mcl2k 2048 1382 0 0 25 2 23 24 0 8 1
mtagpl 96 349 0 0 7 0 7 7 0 8 0
mbufpl 256 1618 0 0 46 0 46 46 0 8 0
bufpl 280 89546 0 83297 447 0 447 447 0 8 0
anonpl 16 4898292 0 4883686 108 49 59 59 0 124 0
amapchunkpl 152 261053 0 260782 42 31 11 23 0 158 0
amappl16 192 262359 0 261702 68 34 34 34 0 8 0
amappl15 184 511 0 510 1 0 1 1 0 8 0
amappl14 176 281 0 277 1 0 1 1 0 8 0
amappl13 168 38288 0 38285 1 0 1 1 0 8 0
amappl12 160 13 0 7 1 0 1 1 0 8 0
amappl11 152 98 0 80 1 0 1 1 0 8 0
amappl10 144 2334 0 2330 1 0 1 1 0 8 0
amappl9 136 40937 0 40935 3 2 1 1 0 8 0
amappl8 128 2547 0 2338 7 0 7 7 0 8 0
amappl7 120 41017 0 41008 1 0 1 1 0 8 0
amappl6 112 2435 0 2415 1 0 1 1 0 8 0
amappl5 104 46558 0 46539 1 0 1 1 0 8 0
amappl4 96 605 0 571 1 0 1 1 0 8 0
amappl3 88 76434 0 76424 1 0 1 1 0 8 0
amappl2 80 680700 0 680620 3 0 3 3 0 8 0
amappl1 72 2141878 0 2141389 26 16 10 19 0 8 0
amappl 80 170510 0 170400 3 0 3 3 0 84 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 65 0 11 1 0 1 1 0 8 0
uaddrrnd 24 84544 0 84502 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 84544 0 84502 1 0 1 1 0 8 0
vmmpekpl 168 272623 0 272584 2 0 2 2 0 8 0
vmmpepl 168 10200139 0 10197971 184 85 99 100 0 357 1
vmsppl 368 84543 0 84502 5 1 4 4 0 8 0
pdppl 4096 169095 0 169030 88 21 67 68 0 8 2
pvpl 32 26845421 0 26827568 322 172 150 150 0 265 0
pmappl 232 84543 0 84502 4 1 3 3 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 416 0 55 11 0 11 11 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(fffffd8068a880a8,9,0) at witness_checkorder+0x1049
rw_enter(fffffd8068a88098,81) at rw_enter+0xd4
rrw_enter(fffffd8068a88098,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:462
VOP_LOCK(fffffd806e251970,81) at VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
vn_lock(fffffd806e251970,81) at vn_lock+0x6c sys/kern/vfs_vnops.c:575
uvn_get(fffffd806e252758,0,ffff800021d6b6f8,ffff800021d6b6e4,0,1) at uvn_get+0x276 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline]
uvn_get(fffffd806e252758,0,ffff800021d6b6f8,ffff800021d6b6e4,0,1) at uvn_get+0x276 sys/uvm/uvm_vnode.c:993
uvm_fault_lower(ffff800021d6b898,ffff800021d6b870,ffff800021d6b770,2,3) at uvm_fault_lower+0x6ff sys/uvm/uvm_fault.c:1116
uvm_fault(fffffd8068a81020,20ff8000,2,3) at uvm_fault+0x176 sys/uvm/uvm_fault.c:946
uvm_fault_wire(fffffd8068a81020,20ff8000,20ffb000,3) at uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1385
uvm_map_pageable_wire(fffffd8068a81020,fffffd80657353f0,fffffd80647510c0,dfe,ffffffff8115ffce,0) at uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367
sys_mlock(ffff800021cbf260,ffff800021d6bab8,ffff800021d6bb00) at sys_mlock+0x180 sys/uvm/uvm_mmap.c:772
syscall(ffff800021d6bb80) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021d6bb80) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe6d7a84e040, count: -14
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
acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020d68ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: -5
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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Anton Lindqvist
Jan 3, 2021, 3:45:33 AM1/3/21
to syzbot, syzkaller-o...@googlegroups.com
This one looks odd. It ended up entering ddb due to a witness finding.
This is visible by checking the full log:
db_enter() at db_enter+0x18
witness_checkorder(fffffd8068a880a8,9,0) at witness_checkorder+0x1049
But nothing witness related got written to the console. Closing for now.
#syz invalid
This is visible by checking the full log:
db_enter() at db_enter+0x18
witness_checkorder(fffffd8068a880a8,9,0) at witness_checkorder+0x1049
But nothing witness related got written to the console. Closing for now.
#syz invalid
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