assert "ISSET(bp->b_flags, B_BC)" failed in vfs_bio.c
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syzbot
Jan 29, 2024, 1:27:29 PMJan 29
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: da5a99b8aa74 drm/amdgpu: fall back to INPUT power for AVG ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1114efc3e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=32810f5c4b7941761619
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/19172855cd6d/disk-da5a99b8.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/add300c78344/bsd-da5a99b8.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d747cef05c13/kernel-da5a99b8.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+32810f...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "ISSET(bp->b_flags, B_BC)" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_bio.c", line 1710
Stopped at db_enter+0x1c: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*288943 32160 0 0 0x4000000 0 syz-executor.6
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8284c9fe) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff828d358e,ffffffff82878c97,6ae,ffffffff828cd854) at __assert+0x29 sys/kern/subr_prf.c:157
bufcache_take(fffffd806d045810) at bufcache_take+0x244 sys/kern/vfs_bio.c:1711
getblk(fffffd806be35720,0,4000,0,ffffffffffffffff) at getblk+0x191 sys/kern/vfs_bio.c:1050
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e bio_doread sys/kern/vfs_bio.c:433 [inline]
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e sys/kern/vfs_bio.c:478
ffs_bufatoff(fffffd8061a64f00,0,0,ffff800037888c88) at ffs_bufatoff+0x129 sys/ufs/ffs/ffs_subr.c:71
ufs_lookup() at ufs_lookup+0x466 sys/ufs/ufs/ufs_lookup.c:256
VOP_LOOKUP(fffffd806be35720,ffff800037889108,ffff800037889138) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000378890d8) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566
namei(ffff8000378890d8) at namei+0x55a sys/kern/vfs_lookup.c:250
vn_open(ffff8000378890d8,201,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107
doopenat(ffff80002a6c9d40,ffffff9c,20000040,200,0,ffff8000378892a0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800037889360) at syscall+0x5ef sys/arch/amd64/amd64/trap.c:591
end trace frame: 0xffff8000378893e0, count: 0
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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: kernel diagnostic assertion "ISSET(bp->b_flags, B_BC)" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_bio.c", line 1710
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8284c9fe) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff828d358e,ffffffff82878c97,6ae,ffffffff828cd854) at __assert+0x29 sys/kern/subr_prf.c:157
bufcache_take(fffffd806d045810) at bufcache_take+0x244 sys/kern/vfs_bio.c:1711
getblk(fffffd806be35720,0,4000,0,ffffffffffffffff) at getblk+0x191 sys/kern/vfs_bio.c:1050
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e bio_doread sys/kern/vfs_bio.c:433 [inline]
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e sys/kern/vfs_bio.c:478
ffs_bufatoff(fffffd8061a64f00,0,0,ffff800037888c88) at ffs_bufatoff+0x129 sys/ufs/ffs/ffs_subr.c:71
ufs_lookup() at ufs_lookup+0x466 sys/ufs/ufs/ufs_lookup.c:256
VOP_LOOKUP(fffffd806be35720,ffff800037889108,ffff800037889138) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000378890d8) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566
namei(ffff8000378890d8) at namei+0x55a sys/kern/vfs_lookup.c:250
vn_open(ffff8000378890d8,201,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107
doopenat(ffff80002a6c9d40,ffffff9c,20000040,200,0,ffff8000378892a0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800037889360) at syscall+0x5ef sys/arch/amd64/amd64/trap.c:591
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf6e5bc03a0, count: -15
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff800037888870
rbx 0
rdx 0xffff800000dc4440
rcx 0
rax 0xffff80002a6c9d40
r8 0x101010101010101
r9 0x8080808080808080
r10 0x675e769b1726e632
r11 0x3173c3b03cbc97b2
r12 0
r13 0xfffffd806d045810
r14 0
r15 0x1
rip 0xffffffff81727edc db_enter+0x1c
cs 0x8
rflags 0x246
rsp 0xffff800037888860
ss 0x10
db_enter+0x1c: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.6) tid=288943 pid=32160 tcnt=2 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=81, usrpri=81, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0
forw=0xffffffffffffffff, list=0xffff80002a6c8d50,0xffff80002a6c9800
process=0xffff8000377e2198 user=0xffff800037884000, vmspace=0xfffffd805bd499d0
estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
72938 514053 77538 60928 3 0x90 nanoslp syz-executor.1
72938 344548 77538 60928 3 0x4000010 smrbar syz-executor.1
72938 207959 77538 60928 3 0x4000090 fsleep syz-executor.1
30809 43538 83151 0 3 0x80 nanoslp syz-executor.4
30809 472087 83151 0 3 0x4000000 biowait syz-executor.4
30809 182858 83151 0 3 0x4000080 fsleep syz-executor.4
81925 228680 95890 0 2 0 syz-executor.3
81925 461429 95890 0 3 0x4000080 fsleep syz-executor.3
81925 251203 95890 0 3 0x4000080 fsleep syz-executor.3
90529 214703 60618 0 3 0x80 fsleep syz-executor.2
90529 4458 60618 0 3 0x4000080 nanoslp syz-executor.2
32160 216058 94430 0 3 0x80 fsleep syz-executor.6
*32160 288943 94430 0 7 0x4000000 syz-executor.6
13443 99475 77834 0 3 0x80 fsleep syz-executor.0
13443 27966 77834 0 3 0x4000080 netio syz-executor.0
43866 205604 0 0 3 0x14280 nfsidl nfsio
69404 484544 0 0 3 0x14280 nfsidl nfsio
49797 487177 0 0 3 0x14280 nfsidl nfsio
36721 210112 0 0 3 0x14280 nfsidl nfsio
74216 50805 0 0 3 0x14280 nfsidl nfsio
50777 444509 0 0 3 0x14280 nfsidl nfsio
77496 256988 0 0 3 0x14280 nfsidl nfsio
27337 277917 0 0 3 0x14280 nfsidl nfsio
57690 487433 0 0 3 0x14280 nfsidl nfsio
10953 136602 0 0 3 0x14280 nfsidl nfsio
20161 515289 0 0 3 0x14280 nfsidl nfsio
75806 522730 0 0 3 0x14280 nfsidl nfsio
62971 14598 0 0 3 0x14280 nfsidl nfsio
97478 132097 0 0 3 0x14280 nfsidl nfsio
38384 107228 0 0 3 0x14280 nfsidl nfsio
90584 382350 0 0 3 0x14280 nfsidl nfsio
10838 208381 0 0 3 0x14280 nfsidl nfsio
74964 185673 0 0 3 0x14280 nfsidl nfsio
65565 278513 0 0 3 0x14280 nfsidl nfsio
82552 358982 0 0 3 0x14280 nfsidl nfsio
8958 482403 0 0 3 0x14200 bored sosplice
87952 79031 1 0 3 0x100083 ttyin getty
94430 81988 17060 0 3 0x82 nanoslp syz-executor.6
86820 307233 17060 0 3 0x82 nanoslp syz-executor.7
83151 262233 17060 0 3 0x82 nanoslp syz-executor.4
95890 456198 17060 0 3 0x82 nanoslp syz-executor.3
60618 452477 17060 0 3 0x82 nanoslp syz-executor.2
77834 336885 17060 0 3 0x82 nanoslp syz-executor.0
77538 214226 17060 0 3 0x82 nanoslp syz-executor.1
17060 417916 86661 0 3 0x2000082 wait syz-fuzzer
17060 69084 86661 0 3 0x6000082 nanoslp syz-fuzzer
17060 26497 86661 0 3 0x6000082 thrsleep syz-fuzzer
17060 97217 86661 0 3 0x6000082 thrsleep syz-fuzzer
17060 324463 86661 0 3 0x6000082 wait syz-fuzzer
17060 468544 86661 0 3 0x6000082 wait syz-fuzzer
17060 443590 86661 0 3 0x6000082 wait syz-fuzzer
17060 323865 86661 0 3 0x6000082 wait syz-fuzzer
17060 83642 86661 0 3 0x6000082 kqread syz-fuzzer
17060 77003 86661 0 3 0x6000082 wait syz-fuzzer
17060 192985 86661 0 3 0x6000082 thrsleep syz-fuzzer
17060 45251 86661 0 3 0x6000082 wait syz-fuzzer
17060 47344 86661 0 3 0x6000082 thrsleep syz-fuzzer
17060 219697 86661 0 3 0x6000082 thrsleep syz-fuzzer
86661 183471 90382 0 3 0x10008a sigsusp ksh
90382 373010 64382 0 3 0x9a kqread sshd
64382 99794 1 0 3 0x88 kqread sshd
69374 44746 13641 73 3 0x1100090 kqread syslogd
13641 71393 1 0 3 0x100082 netio syslogd
24006 69839 1 0 3 0x100080 kqread resolvd
43531 217436 80344 77 3 0x100092 kqread dhcpleased
40237 157487 80344 77 3 0x100092 kqread dhcpleased
80344 67885 1 0 3 0x80 kqread dhcpleased
17410 175194 0 0 3 0x14200 bored smr
7715 120121 0 0 2 0x14200 zerothread
28599 446752 0 0 3 0x14200 aiodoned aiodoned
96328 357560 0 0 3 0x14200 syncer update
32424 289479 0 0 3 0x14200 cleaner cleaner
22039 243727 0 0 3 0x14200 reaper reaper
34449 211191 0 0 3 0x14200 pgdaemon pagedaemon
93185 93369 0 0 3 0x14200 bored viomb
46925 107374 0 0 3 0x40014200 acpi0 acpi0
78411 365727 0 0 3 0x14200 bored softnet3
10950 137672 0 0 3 0x14200 bored softnet2
53292 250465 0 0 3 0x14200 bored softnet1
20913 440468 0 0 3 0x14200 bored softnet0
2866 381020 0 0 3 0x14200 bored systqmp
37735 334981 0 0 3 0x14200 bored systq
30305 464609 0 0 3 0x40014200 tmoslp softclock
15668 150297 0 0 3 0x40014200 idle0
1 12211 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10167 6409K 6851K 166960K 12992 0
pcb 15 14K 16K 166960K 201 0
rtable 195 6K 7K 166960K 468 0
pf 28 8K 8K 166960K 47 0
ifaddr 36 10K 11K 166960K 53 0
ifgroup 47 2K 2K 166960K 80 0
counters 29 17K 17K 166960K 36 0
ioctlops 0 0K 2K 166960K 80 0
iov 0 0K 12K 166960K 38 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1339 84K 84K 166960K 1646 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 14 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 334 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 15 53K 77K 166960K 1028 0
sigio 0 0K 0K 166960K 126 0
proc 56 58K 83K 166960K 529 0
subproc 91 5K 6K 166960K 104 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 205 0
in_multi 77 5K 7K 166960K 99 0
ether_multi 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 67 307K 307K 166960K 67 0
exec 0 0K 1K 166960K 614 0
tdb 3 0K 0K 166960K 3 0
pagedep 1 8K 8K 166960K 1 0
inodedep 1 32K 32K 166960K 1 0
newblk 1 0K 0K 166960K 1 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 329 160K 184K 166960K 12168 0
UVM aobj 128 3K 3K 166960K 134 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 21 0
NDP 10 0K 1K 166960K 33 0
temp 69 6699K 6764K 166960K 14880 0
kqueue 12 18K 24K 166960K 77 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 135 0 132 3 1 2 2 0 8 1
rtentry 112 123 0 34 4 0 4 4 0 8 0
unpcb 144 690 0 673 13 5 8 8 0 8 7
syncache 312 21 0 21 4 3 1 1 0 8 1
tcpqe 32 428 0 428 4 4 0 1 0 8 0
tcpcb 808 345 0 318 16 12 4 10 0 8 1
arp 88 21 0 7 1 0 1 1 0 8 0
inpcb 336 915 0 885 24 15 9 13 0 8 6
nd6 104 26 0 6 1 0 1 1 0 8 0
pkpcb 40 10 0 10 2 2 0 1 0 8 0
kcovpl 48 8 0 1 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 460 0 92 29 4 25 29 0 8 0
art_table 32 461 0 92 4 0 4 4 0 8 0
art_node 16 118 0 38 1 0 1 1 0 8 0
sysvmsgpl 40 50 0 10 1 0 1 1 0 8 0
semapl 112 331 0 321 1 0 1 1 0 8 0
shmpl 112 131 0 6 4 0 4 4 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 2625 0 1186 91 0 91 91 0 8 0
ffsino 240 2625 0 1186 85 0 85 85 0 8 0
nchpl 144 4188 0 2560 63 0 63 63 0 8 0
uvmvnodes 80 3038 0 0 62 0 62 62 0 8 0
vnodes 216 3038 0 0 169 0 169 169 0 8 0
namei 1024 13919 0 13916 3 2 1 3 0 8 0
vcpupl 2048 42 0 1 6 0 6 6 0 8 0
vmpool 664 42 0 1 4 0 4 4 0 8 0
kstatmem 264 34 0 14 2 0 2 2 0 8 0
scxspl 216 14185 0 14184 11 10 1 8 1 8 0
plimitpl 152 165 0 151 1 0 1 1 0 8 0
sigapl 424 1510 0 1446 8 0 8 8 0 8 0
futexpl 64 9363 0 9356 1 0 1 1 0 8 0
knotepl 120 13563 0 13487 6 2 4 6 0 8 0
kqueuepl 184 212 0 204 5 4 1 4 0 8 0
pipepl 288 236 0 211 3 0 3 3 0 8 0
fdescpl 432 1313 0 1287 4 0 4 4 0 8 0
filepl 120 6892 0 6668 18 4 14 14 0 8 5
lockfpl 104 527 0 525 1 0 1 1 0 8 0
lockfspl 48 254 0 252 1 0 1 1 0 8 0
sessionpl 144 24 0 9 1 0 1 1 0 8 0
pgrppl 48 29 0 14 1 0 1 1 0 8 0
ucredpl 104 637 0 625 1 0 1 1 0 8 0
zombiepl 144 1447 0 1446 1 0 1 1 0 8 0
processpl 1072 1510 0 1446 5 0 5 5 0 8 0
procpl 680 3182 0 3096 8 0 8 8 0 8 0
sosppl 168 9 0 6 1 0 1 1 0 8 0
sockpl 456 1750 0 1700 49 18 31 31 0 8 24
mcl64k 65536 42 0 42 1 0 1 1 0 8 1
mcl16k 16384 18 0 18 2 1 1 1 0 8 1
mcl12k 12288 30 0 30 3 2 1 1 0 8 1
mcl9k 9216 11 0 11 4 4 0 1 0 8 0
mcl8k 8192 122 0 122 2 1 1 1 0 8 1
mcl4k 4096 119 0 118 2 1 1 1 0 8 0
mcl2k2 2112 8 0 8 2 2 0 1 0 8 0
mcl2k 2048 69476 0 69433 47 40 7 32 0 8 0
mtagpl 96 209 0 24 6 1 5 5 0 8 0
mbufpl 256 122456 0 122134 100 70 30 84 0 8 8
bufpl 288 5913 0 144 413 0 413 413 0 8 0
anonpl 24 283436 0 269769 94 4 90 93 0 188 7
amapchunkpl 152 40140 0 39154 43 5 38 41 0 158 0
amappl16 200 7105 0 6745 23 1 22 22 0 8 0
amappl15 192 9 0 9 1 1 0 1 0 8 0
amappl14 184 151 0 140 2 1 1 2 0 8 0
amappl13 176 32 0 31 1 0 1 1 0 8 0
amappl12 168 1944 0 1916 2 0 2 2 0 8 0
amappl11 160 60 0 50 1 0 1 1 0 8 0
amappl10 152 31 0 21 1 0 1 1 0 8 0
amappl9 144 149 0 148 2 1 1 1 0 8 0
amappl8 136 211 0 156 2 0 2 2 0 8 0
amappl7 128 165 0 144 2 0 2 2 0 8 0
amappl6 120 239 0 232 1 0 1 1 0 8 0
amappl5 112 153 0 143 1 0 1 1 0 8 0
amappl4 104 412 0 391 2 1 1 2 0 8 0
amappl3 96 8162 0 8074 3 0 3 3 0 8 0
amappl2 88 1779 0 1712 3 1 2 3 0 8 0
amappl1 80 12861 0 12357 22 10 12 22 0 8 0
amappl 88 11640 0 11415 6 0 6 6 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 72 133 0 6 3 0 3 3 0 8 0
uaddrrnd 24 1355 0 1288 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1355 0 1288 1 0 1 1 0 8 0
vmmpekpl 168 15625 0 15567 3 0 3 3 0 8 0
vmmpepl 168 98866 0 96718 133 33 100 132 0 357 3
vmsppl 352 1354 0 1288 7 0 7 7 0 8 0
rwobjpl 24 34764 0 30243 28 0 28 28 0 8 0
pdppl 4096 2716 0 2617 181 81 100 105 0 8 1
pvpl 32 625135 0 605772 334 50 284 334 0 265 127
pmappl 216 1354 0 1288 4 0 4 4 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1024 0 232 25 0 25 25 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8284c9fe) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff828d358e,ffffffff82878c97,6ae,ffffffff828cd854) at __assert+0x29 sys/kern/subr_prf.c:157
bufcache_take(fffffd806d045810) at bufcache_take+0x244 sys/kern/vfs_bio.c:1711
getblk(fffffd806be35720,0,4000,0,ffffffffffffffff) at getblk+0x191 sys/kern/vfs_bio.c:1050
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e bio_doread sys/kern/vfs_bio.c:433 [inline]
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e sys/kern/vfs_bio.c:478
ffs_bufatoff(fffffd8061a64f00,0,0,ffff800037888c88) at ffs_bufatoff+0x129 sys/ufs/ffs/ffs_subr.c:71
ufs_lookup() at ufs_lookup+0x466 sys/ufs/ufs/ufs_lookup.c:256
VOP_LOOKUP(fffffd806be35720,ffff800037889108,ffff800037889138) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000378890d8) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566
namei(ffff8000378890d8) at namei+0x55a sys/kern/vfs_lookup.c:250
vn_open(ffff8000378890d8,201,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107
doopenat(ffff80002a6c9d40,ffffff9c,20000040,200,0,ffff8000378892a0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800037889360) at syscall+0x5ef sys/arch/amd64/amd64/trap.c:591
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf6e5bc03a0, count: -15
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8284c9fe) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff828d358e,ffffffff82878c97,6ae,ffffffff828cd854) at __assert+0x29 sys/kern/subr_prf.c:157
bufcache_take(fffffd806d045810) at bufcache_take+0x244 sys/kern/vfs_bio.c:1711
getblk(fffffd806be35720,0,4000,0,ffffffffffffffff) at getblk+0x191 sys/kern/vfs_bio.c:1050
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e bio_doread sys/kern/vfs_bio.c:433 [inline]
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e sys/kern/vfs_bio.c:478
ffs_bufatoff(fffffd8061a64f00,0,0,ffff800037888c88) at ffs_bufatoff+0x129 sys/ufs/ffs/ffs_subr.c:71
ufs_lookup() at ufs_lookup+0x466 sys/ufs/ufs/ufs_lookup.c:256
VOP_LOOKUP(fffffd806be35720,ffff800037889108,ffff800037889138) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000378890d8) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566
namei(ffff8000378890d8) at namei+0x55a sys/kern/vfs_lookup.c:250
vn_open(ffff8000378890d8,201,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107
doopenat(ffff80002a6c9d40,ffffff9c,20000040,200,0,ffff8000378892a0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800037889360) at syscall+0x5ef sys/arch/amd64/amd64/trap.c:591
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf6e5bc03a0, count: -15
---
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If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: da5a99b8aa74 drm/amdgpu: fall back to INPUT power for AVG ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1114efc3e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=32810f5c4b7941761619
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/19172855cd6d/disk-da5a99b8.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/add300c78344/bsd-da5a99b8.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d747cef05c13/kernel-da5a99b8.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+32810f...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "ISSET(bp->b_flags, B_BC)" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_bio.c", line 1710
Stopped at db_enter+0x1c: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*288943 32160 0 0 0x4000000 0 syz-executor.6
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8284c9fe) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff828d358e,ffffffff82878c97,6ae,ffffffff828cd854) at __assert+0x29 sys/kern/subr_prf.c:157
bufcache_take(fffffd806d045810) at bufcache_take+0x244 sys/kern/vfs_bio.c:1711
getblk(fffffd806be35720,0,4000,0,ffffffffffffffff) at getblk+0x191 sys/kern/vfs_bio.c:1050
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e bio_doread sys/kern/vfs_bio.c:433 [inline]
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e sys/kern/vfs_bio.c:478
ffs_bufatoff(fffffd8061a64f00,0,0,ffff800037888c88) at ffs_bufatoff+0x129 sys/ufs/ffs/ffs_subr.c:71
ufs_lookup() at ufs_lookup+0x466 sys/ufs/ufs/ufs_lookup.c:256
VOP_LOOKUP(fffffd806be35720,ffff800037889108,ffff800037889138) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000378890d8) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566
namei(ffff8000378890d8) at namei+0x55a sys/kern/vfs_lookup.c:250
vn_open(ffff8000378890d8,201,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107
doopenat(ffff80002a6c9d40,ffffff9c,20000040,200,0,ffff8000378892a0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800037889360) at syscall+0x5ef sys/arch/amd64/amd64/trap.c:591
end trace frame: 0xffff8000378893e0, count: 0
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>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: kernel diagnostic assertion "ISSET(bp->b_flags, B_BC)" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_bio.c", line 1710
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8284c9fe) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff828d358e,ffffffff82878c97,6ae,ffffffff828cd854) at __assert+0x29 sys/kern/subr_prf.c:157
bufcache_take(fffffd806d045810) at bufcache_take+0x244 sys/kern/vfs_bio.c:1711
getblk(fffffd806be35720,0,4000,0,ffffffffffffffff) at getblk+0x191 sys/kern/vfs_bio.c:1050
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e bio_doread sys/kern/vfs_bio.c:433 [inline]
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e sys/kern/vfs_bio.c:478
ffs_bufatoff(fffffd8061a64f00,0,0,ffff800037888c88) at ffs_bufatoff+0x129 sys/ufs/ffs/ffs_subr.c:71
ufs_lookup() at ufs_lookup+0x466 sys/ufs/ufs/ufs_lookup.c:256
VOP_LOOKUP(fffffd806be35720,ffff800037889108,ffff800037889138) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000378890d8) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566
namei(ffff8000378890d8) at namei+0x55a sys/kern/vfs_lookup.c:250
vn_open(ffff8000378890d8,201,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107
doopenat(ffff80002a6c9d40,ffffff9c,20000040,200,0,ffff8000378892a0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800037889360) at syscall+0x5ef sys/arch/amd64/amd64/trap.c:591
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf6e5bc03a0, count: -15
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff800037888870
rbx 0
rdx 0xffff800000dc4440
rcx 0
rax 0xffff80002a6c9d40
r8 0x101010101010101
r9 0x8080808080808080
r10 0x675e769b1726e632
r11 0x3173c3b03cbc97b2
r12 0
r13 0xfffffd806d045810
r14 0
r15 0x1
rip 0xffffffff81727edc db_enter+0x1c
cs 0x8
rflags 0x246
rsp 0xffff800037888860
ss 0x10
db_enter+0x1c: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.6) tid=288943 pid=32160 tcnt=2 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=81, usrpri=81, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0
forw=0xffffffffffffffff, list=0xffff80002a6c8d50,0xffff80002a6c9800
process=0xffff8000377e2198 user=0xffff800037884000, vmspace=0xfffffd805bd499d0
estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
72938 514053 77538 60928 3 0x90 nanoslp syz-executor.1
72938 344548 77538 60928 3 0x4000010 smrbar syz-executor.1
72938 207959 77538 60928 3 0x4000090 fsleep syz-executor.1
30809 43538 83151 0 3 0x80 nanoslp syz-executor.4
30809 472087 83151 0 3 0x4000000 biowait syz-executor.4
30809 182858 83151 0 3 0x4000080 fsleep syz-executor.4
81925 228680 95890 0 2 0 syz-executor.3
81925 461429 95890 0 3 0x4000080 fsleep syz-executor.3
81925 251203 95890 0 3 0x4000080 fsleep syz-executor.3
90529 214703 60618 0 3 0x80 fsleep syz-executor.2
90529 4458 60618 0 3 0x4000080 nanoslp syz-executor.2
32160 216058 94430 0 3 0x80 fsleep syz-executor.6
*32160 288943 94430 0 7 0x4000000 syz-executor.6
13443 99475 77834 0 3 0x80 fsleep syz-executor.0
13443 27966 77834 0 3 0x4000080 netio syz-executor.0
43866 205604 0 0 3 0x14280 nfsidl nfsio
69404 484544 0 0 3 0x14280 nfsidl nfsio
49797 487177 0 0 3 0x14280 nfsidl nfsio
36721 210112 0 0 3 0x14280 nfsidl nfsio
74216 50805 0 0 3 0x14280 nfsidl nfsio
50777 444509 0 0 3 0x14280 nfsidl nfsio
77496 256988 0 0 3 0x14280 nfsidl nfsio
27337 277917 0 0 3 0x14280 nfsidl nfsio
57690 487433 0 0 3 0x14280 nfsidl nfsio
10953 136602 0 0 3 0x14280 nfsidl nfsio
20161 515289 0 0 3 0x14280 nfsidl nfsio
75806 522730 0 0 3 0x14280 nfsidl nfsio
62971 14598 0 0 3 0x14280 nfsidl nfsio
97478 132097 0 0 3 0x14280 nfsidl nfsio
38384 107228 0 0 3 0x14280 nfsidl nfsio
90584 382350 0 0 3 0x14280 nfsidl nfsio
10838 208381 0 0 3 0x14280 nfsidl nfsio
74964 185673 0 0 3 0x14280 nfsidl nfsio
65565 278513 0 0 3 0x14280 nfsidl nfsio
82552 358982 0 0 3 0x14280 nfsidl nfsio
8958 482403 0 0 3 0x14200 bored sosplice
87952 79031 1 0 3 0x100083 ttyin getty
94430 81988 17060 0 3 0x82 nanoslp syz-executor.6
86820 307233 17060 0 3 0x82 nanoslp syz-executor.7
83151 262233 17060 0 3 0x82 nanoslp syz-executor.4
95890 456198 17060 0 3 0x82 nanoslp syz-executor.3
60618 452477 17060 0 3 0x82 nanoslp syz-executor.2
77834 336885 17060 0 3 0x82 nanoslp syz-executor.0
77538 214226 17060 0 3 0x82 nanoslp syz-executor.1
17060 417916 86661 0 3 0x2000082 wait syz-fuzzer
17060 69084 86661 0 3 0x6000082 nanoslp syz-fuzzer
17060 26497 86661 0 3 0x6000082 thrsleep syz-fuzzer
17060 97217 86661 0 3 0x6000082 thrsleep syz-fuzzer
17060 324463 86661 0 3 0x6000082 wait syz-fuzzer
17060 468544 86661 0 3 0x6000082 wait syz-fuzzer
17060 443590 86661 0 3 0x6000082 wait syz-fuzzer
17060 323865 86661 0 3 0x6000082 wait syz-fuzzer
17060 83642 86661 0 3 0x6000082 kqread syz-fuzzer
17060 77003 86661 0 3 0x6000082 wait syz-fuzzer
17060 192985 86661 0 3 0x6000082 thrsleep syz-fuzzer
17060 45251 86661 0 3 0x6000082 wait syz-fuzzer
17060 47344 86661 0 3 0x6000082 thrsleep syz-fuzzer
17060 219697 86661 0 3 0x6000082 thrsleep syz-fuzzer
86661 183471 90382 0 3 0x10008a sigsusp ksh
90382 373010 64382 0 3 0x9a kqread sshd
64382 99794 1 0 3 0x88 kqread sshd
69374 44746 13641 73 3 0x1100090 kqread syslogd
13641 71393 1 0 3 0x100082 netio syslogd
24006 69839 1 0 3 0x100080 kqread resolvd
43531 217436 80344 77 3 0x100092 kqread dhcpleased
40237 157487 80344 77 3 0x100092 kqread dhcpleased
80344 67885 1 0 3 0x80 kqread dhcpleased
17410 175194 0 0 3 0x14200 bored smr
7715 120121 0 0 2 0x14200 zerothread
28599 446752 0 0 3 0x14200 aiodoned aiodoned
96328 357560 0 0 3 0x14200 syncer update
32424 289479 0 0 3 0x14200 cleaner cleaner
22039 243727 0 0 3 0x14200 reaper reaper
34449 211191 0 0 3 0x14200 pgdaemon pagedaemon
93185 93369 0 0 3 0x14200 bored viomb
46925 107374 0 0 3 0x40014200 acpi0 acpi0
78411 365727 0 0 3 0x14200 bored softnet3
10950 137672 0 0 3 0x14200 bored softnet2
53292 250465 0 0 3 0x14200 bored softnet1
20913 440468 0 0 3 0x14200 bored softnet0
2866 381020 0 0 3 0x14200 bored systqmp
37735 334981 0 0 3 0x14200 bored systq
30305 464609 0 0 3 0x40014200 tmoslp softclock
15668 150297 0 0 3 0x40014200 idle0
1 12211 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10167 6409K 6851K 166960K 12992 0
pcb 15 14K 16K 166960K 201 0
rtable 195 6K 7K 166960K 468 0
pf 28 8K 8K 166960K 47 0
ifaddr 36 10K 11K 166960K 53 0
ifgroup 47 2K 2K 166960K 80 0
counters 29 17K 17K 166960K 36 0
ioctlops 0 0K 2K 166960K 80 0
iov 0 0K 12K 166960K 38 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1339 84K 84K 166960K 1646 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 14 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 334 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 15 53K 77K 166960K 1028 0
sigio 0 0K 0K 166960K 126 0
proc 56 58K 83K 166960K 529 0
subproc 91 5K 6K 166960K 104 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 205 0
in_multi 77 5K 7K 166960K 99 0
ether_multi 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 67 307K 307K 166960K 67 0
exec 0 0K 1K 166960K 614 0
tdb 3 0K 0K 166960K 3 0
pagedep 1 8K 8K 166960K 1 0
inodedep 1 32K 32K 166960K 1 0
newblk 1 0K 0K 166960K 1 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 329 160K 184K 166960K 12168 0
UVM aobj 128 3K 3K 166960K 134 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 21 0
NDP 10 0K 1K 166960K 33 0
temp 69 6699K 6764K 166960K 14880 0
kqueue 12 18K 24K 166960K 77 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 135 0 132 3 1 2 2 0 8 1
rtentry 112 123 0 34 4 0 4 4 0 8 0
unpcb 144 690 0 673 13 5 8 8 0 8 7
syncache 312 21 0 21 4 3 1 1 0 8 1
tcpqe 32 428 0 428 4 4 0 1 0 8 0
tcpcb 808 345 0 318 16 12 4 10 0 8 1
arp 88 21 0 7 1 0 1 1 0 8 0
inpcb 336 915 0 885 24 15 9 13 0 8 6
nd6 104 26 0 6 1 0 1 1 0 8 0
pkpcb 40 10 0 10 2 2 0 1 0 8 0
kcovpl 48 8 0 1 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 460 0 92 29 4 25 29 0 8 0
art_table 32 461 0 92 4 0 4 4 0 8 0
art_node 16 118 0 38 1 0 1 1 0 8 0
sysvmsgpl 40 50 0 10 1 0 1 1 0 8 0
semapl 112 331 0 321 1 0 1 1 0 8 0
shmpl 112 131 0 6 4 0 4 4 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 2625 0 1186 91 0 91 91 0 8 0
ffsino 240 2625 0 1186 85 0 85 85 0 8 0
nchpl 144 4188 0 2560 63 0 63 63 0 8 0
uvmvnodes 80 3038 0 0 62 0 62 62 0 8 0
vnodes 216 3038 0 0 169 0 169 169 0 8 0
namei 1024 13919 0 13916 3 2 1 3 0 8 0
vcpupl 2048 42 0 1 6 0 6 6 0 8 0
vmpool 664 42 0 1 4 0 4 4 0 8 0
kstatmem 264 34 0 14 2 0 2 2 0 8 0
scxspl 216 14185 0 14184 11 10 1 8 1 8 0
plimitpl 152 165 0 151 1 0 1 1 0 8 0
sigapl 424 1510 0 1446 8 0 8 8 0 8 0
futexpl 64 9363 0 9356 1 0 1 1 0 8 0
knotepl 120 13563 0 13487 6 2 4 6 0 8 0
kqueuepl 184 212 0 204 5 4 1 4 0 8 0
pipepl 288 236 0 211 3 0 3 3 0 8 0
fdescpl 432 1313 0 1287 4 0 4 4 0 8 0
filepl 120 6892 0 6668 18 4 14 14 0 8 5
lockfpl 104 527 0 525 1 0 1 1 0 8 0
lockfspl 48 254 0 252 1 0 1 1 0 8 0
sessionpl 144 24 0 9 1 0 1 1 0 8 0
pgrppl 48 29 0 14 1 0 1 1 0 8 0
ucredpl 104 637 0 625 1 0 1 1 0 8 0
zombiepl 144 1447 0 1446 1 0 1 1 0 8 0
processpl 1072 1510 0 1446 5 0 5 5 0 8 0
procpl 680 3182 0 3096 8 0 8 8 0 8 0
sosppl 168 9 0 6 1 0 1 1 0 8 0
sockpl 456 1750 0 1700 49 18 31 31 0 8 24
mcl64k 65536 42 0 42 1 0 1 1 0 8 1
mcl16k 16384 18 0 18 2 1 1 1 0 8 1
mcl12k 12288 30 0 30 3 2 1 1 0 8 1
mcl9k 9216 11 0 11 4 4 0 1 0 8 0
mcl8k 8192 122 0 122 2 1 1 1 0 8 1
mcl4k 4096 119 0 118 2 1 1 1 0 8 0
mcl2k2 2112 8 0 8 2 2 0 1 0 8 0
mcl2k 2048 69476 0 69433 47 40 7 32 0 8 0
mtagpl 96 209 0 24 6 1 5 5 0 8 0
mbufpl 256 122456 0 122134 100 70 30 84 0 8 8
bufpl 288 5913 0 144 413 0 413 413 0 8 0
anonpl 24 283436 0 269769 94 4 90 93 0 188 7
amapchunkpl 152 40140 0 39154 43 5 38 41 0 158 0
amappl16 200 7105 0 6745 23 1 22 22 0 8 0
amappl15 192 9 0 9 1 1 0 1 0 8 0
amappl14 184 151 0 140 2 1 1 2 0 8 0
amappl13 176 32 0 31 1 0 1 1 0 8 0
amappl12 168 1944 0 1916 2 0 2 2 0 8 0
amappl11 160 60 0 50 1 0 1 1 0 8 0
amappl10 152 31 0 21 1 0 1 1 0 8 0
amappl9 144 149 0 148 2 1 1 1 0 8 0
amappl8 136 211 0 156 2 0 2 2 0 8 0
amappl7 128 165 0 144 2 0 2 2 0 8 0
amappl6 120 239 0 232 1 0 1 1 0 8 0
amappl5 112 153 0 143 1 0 1 1 0 8 0
amappl4 104 412 0 391 2 1 1 2 0 8 0
amappl3 96 8162 0 8074 3 0 3 3 0 8 0
amappl2 88 1779 0 1712 3 1 2 3 0 8 0
amappl1 80 12861 0 12357 22 10 12 22 0 8 0
amappl 88 11640 0 11415 6 0 6 6 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 72 133 0 6 3 0 3 3 0 8 0
uaddrrnd 24 1355 0 1288 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1355 0 1288 1 0 1 1 0 8 0
vmmpekpl 168 15625 0 15567 3 0 3 3 0 8 0
vmmpepl 168 98866 0 96718 133 33 100 132 0 357 3
vmsppl 352 1354 0 1288 7 0 7 7 0 8 0
rwobjpl 24 34764 0 30243 28 0 28 28 0 8 0
pdppl 4096 2716 0 2617 181 81 100 105 0 8 1
pvpl 32 625135 0 605772 334 50 284 334 0 265 127
pmappl 216 1354 0 1288 4 0 4 4 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1024 0 232 25 0 25 25 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8284c9fe) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff828d358e,ffffffff82878c97,6ae,ffffffff828cd854) at __assert+0x29 sys/kern/subr_prf.c:157
bufcache_take(fffffd806d045810) at bufcache_take+0x244 sys/kern/vfs_bio.c:1711
getblk(fffffd806be35720,0,4000,0,ffffffffffffffff) at getblk+0x191 sys/kern/vfs_bio.c:1050
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e bio_doread sys/kern/vfs_bio.c:433 [inline]
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e sys/kern/vfs_bio.c:478
ffs_bufatoff(fffffd8061a64f00,0,0,ffff800037888c88) at ffs_bufatoff+0x129 sys/ufs/ffs/ffs_subr.c:71
ufs_lookup() at ufs_lookup+0x466 sys/ufs/ufs/ufs_lookup.c:256
VOP_LOOKUP(fffffd806be35720,ffff800037889108,ffff800037889138) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000378890d8) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566
namei(ffff8000378890d8) at namei+0x55a sys/kern/vfs_lookup.c:250
vn_open(ffff8000378890d8,201,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107
doopenat(ffff80002a6c9d40,ffffff9c,20000040,200,0,ffff8000378892a0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800037889360) at syscall+0x5ef sys/arch/amd64/amd64/trap.c:591
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf6e5bc03a0, count: -15
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8284c9fe) at panic+0x165 sys/kern/subr_prf.c:198
__assert(ffffffff828d358e,ffffffff82878c97,6ae,ffffffff828cd854) at __assert+0x29 sys/kern/subr_prf.c:157
bufcache_take(fffffd806d045810) at bufcache_take+0x244 sys/kern/vfs_bio.c:1711
getblk(fffffd806be35720,0,4000,0,ffffffffffffffff) at getblk+0x191 sys/kern/vfs_bio.c:1050
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e bio_doread sys/kern/vfs_bio.c:433 [inline]
bread(fffffd806be35720,0,4000,ffff800037888bd0) at bread+0x3e sys/kern/vfs_bio.c:478
ffs_bufatoff(fffffd8061a64f00,0,0,ffff800037888c88) at ffs_bufatoff+0x129 sys/ufs/ffs/ffs_subr.c:71
ufs_lookup() at ufs_lookup+0x466 sys/ufs/ufs/ufs_lookup.c:256
VOP_LOOKUP(fffffd806be35720,ffff800037889108,ffff800037889138) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000378890d8) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566
namei(ffff8000378890d8) at namei+0x55a sys/kern/vfs_lookup.c:250
vn_open(ffff8000378890d8,201,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107
doopenat(ffff80002a6c9d40,ffffff9c,20000040,200,0,ffff8000378892a0) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126
syscall(ffff800037889360) at syscall+0x5ef sys/arch/amd64/amd64/trap.c:591
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf6e5bc03a0, count: -15
---
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If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
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