assert "bp->b_data != NULL" failed in vfs_biomem.c (2)
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syzbot
Mar 30, 2022, 8:15:20 AM3/30/22
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: f802266ee2c9 Avoid segfaults in EVP_PKEY_CTX_free()
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=10b9ddbb700000
kernel config: https://syzkaller.appspot.com/x/.config?x=fe55924c11e64b0a
dashboard link: https://syzkaller.appspot.com/bug?extid=a59c061e56e031c99f11
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+a59c06...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "bp->b_data != NULL" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 235
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*506925 23847 0 0 0x1 0 syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline]
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315
sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173
syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
end trace frame: 0xffff80002e8df670, 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 "bp->b_data != NULL" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 235
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline]
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315
sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173
syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffdae60, count: -15
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002e8deb40
rbx 0x4000001 __kernel_phys_end+0x1400001
rdx 0
rcx 0
rax 0xffff8000216647e0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xfdd1f31140dfad65
r11 0xa5b700d4cbbc2d0c
r12 0
r13 0
r14 0
r15 0x1
rip 0xffffffff81373428 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002e8deb30
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.1) pid=506925 stat=onproc
flags process=0 proc=1<INKTR>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff8000216cd7b0,0xffff800021664010
process=0xffff80002166e820 user=0xffff80002e8da000, vmspace=0xfffffd807e15d890
estcpu=36, cpticks=4, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*23847 506925 85149 0 7 0x1 syz-executor.1
23847 512691 85149 0 3 0x4000080 netio syz-executor.1
23847 476826 85149 0 3 0x4000080 kqread syz-executor.1
89328 114504 91847 0 3 0x80 nanoslp syz-executor.3
89328 20712 91847 0 3 0x4000080 ttyout syz-executor.3
95246 59820 90907 0 3 0x82 piperd syz-executor.7
85149 289603 90907 0 3 0x82 nanoslp syz-executor.1
91847 175822 90907 0 3 0x82 nanoslp syz-executor.3
14988 143860 90907 0 3 0x82 piperd syz-executor.4
95190 521807 90907 0 3 0x82 piperd syz-executor.6
34705 4302 90907 0 3 0x82 piperd syz-executor.5
79737 485789 90907 0 3 0x2 biowait syz-executor.0
9631 377889 1 0 3 0x100083 ttyin getty
38335 227834 0 0 3 0x14200 acct acct
30210 5523 0 0 3 0x14280 nfsidl nfsio
98982 102921 0 0 3 0x14280 nfsidl nfsio
96671 427491 0 0 3 0x14280 nfsidl nfsio
48395 191094 0 0 3 0x14280 nfsidl nfsio
7284 294449 0 0 3 0x14280 nfsidl nfsio
98026 355252 0 0 3 0x14280 nfsidl nfsio
58365 37836 0 0 3 0x14280 nfsidl nfsio
47099 145362 0 0 3 0x14280 nfsidl nfsio
92931 200730 0 0 3 0x14280 nfsidl nfsio
43594 247699 0 0 3 0x14280 nfsidl nfsio
37644 334620 0 0 3 0x14280 nfsidl nfsio
25208 336665 0 0 3 0x14280 nfsidl nfsio
90922 362139 0 0 3 0x14280 nfsidl nfsio
67830 357951 0 0 3 0x14280 nfsidl nfsio
75518 330188 0 0 3 0x14280 nfsidl nfsio
75190 90965 0 0 3 0x14280 nfsidl nfsio
73055 64474 0 0 3 0x14280 nfsidl nfsio
93175 332372 0 0 3 0x14280 nfsidl nfsio
66185 77137 0 0 3 0x14280 nfsidl nfsio
51320 346101 0 0 3 0x14280 nfsidl nfsio
69052 358289 0 0 3 0x14200 bored sosplice
39008 96959 90907 0 3 0x82 piperd syz-executor.2
90907 263776 71848 0 3 0x82 thrsleep syz-fuzzer
90907 172353 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 396137 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 407783 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 34626 71848 0 3 0x4000082 kqread syz-fuzzer
90907 328986 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 198163 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 349376 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 518397 71848 0 3 0x4000082 thrsleep syz-fuzzer
71848 143218 79048 0 3 0x10008a sigsusp ksh
79048 421921 14926 0 3 0x9a kqread sshd
14926 265503 1 0 3 0x88 kqread sshd
7753 515567 26242 73 3 0x1100090 kqread syslogd
26242 482600 1 0 3 0x100082 netio syslogd
46949 89457 1 0 3 0x100080 kqread resolvd
38004 194443 56376 77 3 0x100092 kqread dhcpleased
93919 32602 56376 77 3 0x100092 kqread dhcpleased
56376 437886 1 0 3 0x80 kqread dhcpleased
45551 518308 0 0 3 0x14200 bored smr
91826 266654 0 0 2 0x14200 zerothread
89660 156001 0 0 3 0x14200 aiodoned aiodoned
17314 87907 0 0 3 0x14200 syncer update
137 458406 0 0 3 0x14200 cleaner cleaner
65362 6419 0 0 3 0x14200 reaper reaper
68017 183700 0 0 3 0x14200 pgdaemon pagedaemon
39218 442289 0 0 3 0x14200 bored viomb
19975 95523 0 0 3 0x40014200 acpi0 acpi0
72984 250174 0 0 3 0x14200 bored softnet
57300 85980 0 0 3 0x14200 bored systqmp
46581 361770 0 0 3 0x14200 bored systq
43910 95438 0 0 3 0x40014200 bored softclock
64834 284931 0 0 3 0x40014200 idle0
1 127049 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 10206 6444K 6896K 78643K 32947 0
pcb 13 16K 18K 78643K 1328 0
rtable 240 16K 17K 78643K 8105 0
ifaddr 97 20K 21K 78643K 2326 0
sysctl 3 1K 1K 78643K 3 0
counters 28 17K 17K 78643K 125 0
ioctlops 0 0K 4K 78643K 12969 0
iov 0 0K 32K 78643K 2132 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1330 83K 84K 78643K 22985 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 111 0
VM map 2 0K 0K 78643K 2 0
sem 10 1K 1K 78643K 16 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 12 41K 69K 78643K 19886 0
sigio 0 0K 0K 78643K 185 0
proc 60 55K 71K 78643K 1687 0
subproc 104 6K 6K 78643K 498 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 1577 0
in_multi 95 6K 6K 78643K 683 0
ether_multi 1 0K 0K 78643K 87 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 235 1049K 1049K 78643K 235 0
exec 0 0K 2K 78643K 2303 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 426 579K 581K 78643K 241512 0
UVM aobj 131 9K 9K 78643K 131 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 452 0
NDP 14 0K 2K 78643K 200 0
temp 144 4721K 5081K 78643K 85516 0
kqueue 12 18K 28K 78643K 1142 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 360 0 357 3 2 1 2 0 8 0
rtentry 112 551 0 447 4 0 4 4 0 8 0
unpcb 136 14315 0 14300 72 71 1 6 0 8 0
syncache 296 23 0 23 7 7 0 1 0 8 0
tcpqe 32 7 0 7 3 3 0 1 0 8 0
tcpcb 736 9512 0 9507 204 200 4 17 0 8 3
arp 88 90 0 71 1 0 1 1 0 8 0
ipq 40 14 0 13 7 6 1 1 0 8 0
ipqe 40 44 0 43 7 6 1 1 0 8 0
inpcb 312 14230 0 14223 173 167 6 11 0 8 5
rttmr 72 13 0 13 4 4 0 1 0 8 0
ip6q 72 5 0 5 3 2 1 1 0 8 1
ip6af 40 8 0 8 2 1 1 1 0 8 1
nd6 48 142 0 117 1 0 1 1 0 8 0
pkpcb 40 63 0 63 7 7 0 1 0 8 0
kcovpl 48 38 0 30 1 0 1 1 0 8 0
ppxss 1152 35 0 35 9 9 0 1 0 8 0
pfrktable 1344 3092 0 3090 3 2 1 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfstitem 24 2 0 0 1 0 1 1 0 8 0
pfstkey 112 8 0 6 1 0 1 1 0 8 0
pfstate 320 4 0 3 1 0 1 1 0 8 0
pfrule 1360 682 0 653 8 5 3 7 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 2561 0 2143 50 23 27 29 0 8 0
art_table 32 2562 0 2143 4 0 4 4 0 8 0
art_node 16 550 0 457 1 0 1 1 0 8 0
sysvmsgpl 40 76 0 39 2 1 1 1 0 8 0
semupl 112 5 0 5 1 1 0 1 0 8 0
semapl 112 8 0 0 1 0 1 1 0 8 0
shmpl 112 128 0 0 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 40946 0 39477 92 0 92 92 0 8 0
ffsino 240 40946 0 39477 87 0 87 87 0 8 0
nchpl 144 76450 0 74834 62 0 62 62 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 224 5926 0 0 349 0 349 349 0 8 0
namei 1024 292719 0 292718 3 2 1 2 0 8 0
vcpupl 1984 105 0 3 14 1 13 13 0 8 0
vmpool 528 155 0 53 8 1 7 7 0 8 0
pfiaddrpl 120 780 0 780 3 3 0 1 0 8 0
scsiplug 72 4 0 4 2 2 0 1 0 8 0
scxspl 216 138663 0 138661 25 24 1 8 0 8 0
plimitpl 152 1176 0 1161 1 0 1 1 0 8 0
sigapl 424 20134 0 20076 8 0 8 8 0 8 0
futexpl 64 291120 0 291120 1 0 1 1 0 8 1
knotepl 120 216370 0 216290 69 62 7 8 0 8 4
kqueuepl 184 8676 0 8666 41 40 1 4 0 8 0
pipepl 304 2392 0 2364 73 70 3 8 0 8 0
fdescpl 432 20099 0 20076 4 0 4 4 0 8 0
filepl 120 215234 0 214987 169 156 13 16 0 8 5
lockfpl 104 7560 0 7558 9 8 1 2 0 8 0
lockfspl 48 2583 0 2581 1 0 1 1 0 8 0
sessionpl 144 54 0 38 1 0 1 1 0 8 0
pgrppl 48 127 0 111 1 0 1 1 0 8 0
ucredpl 96 85865 0 85849 1 0 1 1 0 8 0
zombiepl 144 20076 0 20076 2 1 1 1 0 8 1
processpl 1000 20134 0 20076 11 2 9 9 0 8 0
procpl 672 49004 0 48935 45 37 8 9 0 8 0
sosppl 168 95 0 95 20 20 0 1 0 8 0
sockpl 448 28969 0 28944 355 344 11 26 0 8 8
mcl64k 65536 461 0 461 40 39 1 1 0 8 1
mcl16k 16384 125 0 125 32 31 1 1 0 8 1
mcl12k 12288 649 0 649 36 35 1 1 0 8 1
mcl9k 9216 244 0 244 38 37 1 1 0 8 1
mcl8k 8192 4332 0 4332 11 10 1 1 0 8 1
mcl4k 4096 2455 0 2455 11 10 1 1 0 8 1
mcl2k2 2112 121 0 121 30 29 1 1 0 8 1
mcl2k 2048 117952 0 117873 36 24 12 20 0 8 0
mtagpl 96 2114 0 1862 25 18 7 9 0 8 0
mbufpl 256 304198 0 303734 86 54 32 40 0 8 0
bufpl 288 30324 0 23916 458 0 458 458 0 8 0
anonpl 24 5415894 0 5395392 358 203 155 157 0 188 13
amapchunkpl 152 577875 0 577161 126 91 35 47 0 158 0
amappl16 200 53307 0 52517 226 175 51 55 0 8 8
amappl15 192 3869 0 3864 1 0 1 1 0 8 0
amappl14 184 7086 0 7075 1 0 1 1 0 8 0
amappl13 176 2539 0 2537 1 0 1 1 0 8 0
amappl12 168 1610 0 1602 2 1 1 1 0 8 0
amappl11 160 1440 0 1427 1 0 1 1 0 8 0
amappl10 152 3083 0 3082 3 2 1 1 0 8 0
amappl9 144 1905 0 1901 1 0 1 1 0 8 0
amappl8 136 3353 0 3240 5 0 5 5 0 8 1
amappl7 128 2273 0 2260 1 0 1 1 0 8 0
amappl6 120 1729 0 1704 2 1 1 2 0 8 0
amappl5 112 18106 0 18095 1 0 1 1 0 8 0
amappl4 104 7332 0 7279 2 0 2 2 0 8 0
amappl3 96 3432 0 3419 1 0 1 1 0 8 0
amappl2 88 7409 0 7353 3 1 2 3 0 8 0
amappl1 80 357994 0 357489 19 6 13 18 0 8 0
amappl 88 239947 0 239720 7 0 7 7 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 72 130 0 0 3 0 3 3 0 8 0
uaddrrnd 24 20254 0 20129 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 20254 0 20129 1 0 1 1 0 8 0
vmmpekpl 168 126797 0 126723 4 0 4 4 0 8 0
vmmpepl 168 1786898 0 1784275 335 189 146 169 0 357 6
vmsppl 272 20253 0 20129 9 0 9 9 0 8 0
rwobjpl 24 424386 0 416543 53 3 50 50 0 8 0
pdppl 4096 40514 0 40360 823 657 166 166 0 8 12
pvpl 32 8837518 0 8815082 626 397 229 259 0 265 27
pmappl 216 20253 0 20129 8 0 8 8 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 2485 0 1568 27 0 27 27 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline]
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315
sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173
syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffdae60, count: -15
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline]
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315
sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173
syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffdae60, count: -15
---
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https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: f802266ee2c9 Avoid segfaults in EVP_PKEY_CTX_free()
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=10b9ddbb700000
kernel config: https://syzkaller.appspot.com/x/.config?x=fe55924c11e64b0a
dashboard link: https://syzkaller.appspot.com/bug?extid=a59c061e56e031c99f11
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+a59c06...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "bp->b_data != NULL" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 235
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*506925 23847 0 0 0x1 0 syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline]
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315
sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173
syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
end trace frame: 0xffff80002e8df670, 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 "bp->b_data != NULL" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 235
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline]
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315
sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173
syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffdae60, count: -15
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002e8deb40
rbx 0x4000001 __kernel_phys_end+0x1400001
rdx 0
rcx 0
rax 0xffff8000216647e0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xfdd1f31140dfad65
r11 0xa5b700d4cbbc2d0c
r12 0
r13 0
r14 0
r15 0x1
rip 0xffffffff81373428 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002e8deb30
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.1) pid=506925 stat=onproc
flags process=0 proc=1<INKTR>
pri=86, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff8000216cd7b0,0xffff800021664010
process=0xffff80002166e820 user=0xffff80002e8da000, vmspace=0xfffffd807e15d890
estcpu=36, cpticks=4, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*23847 506925 85149 0 7 0x1 syz-executor.1
23847 512691 85149 0 3 0x4000080 netio syz-executor.1
23847 476826 85149 0 3 0x4000080 kqread syz-executor.1
89328 114504 91847 0 3 0x80 nanoslp syz-executor.3
89328 20712 91847 0 3 0x4000080 ttyout syz-executor.3
95246 59820 90907 0 3 0x82 piperd syz-executor.7
85149 289603 90907 0 3 0x82 nanoslp syz-executor.1
91847 175822 90907 0 3 0x82 nanoslp syz-executor.3
14988 143860 90907 0 3 0x82 piperd syz-executor.4
95190 521807 90907 0 3 0x82 piperd syz-executor.6
34705 4302 90907 0 3 0x82 piperd syz-executor.5
79737 485789 90907 0 3 0x2 biowait syz-executor.0
9631 377889 1 0 3 0x100083 ttyin getty
38335 227834 0 0 3 0x14200 acct acct
30210 5523 0 0 3 0x14280 nfsidl nfsio
98982 102921 0 0 3 0x14280 nfsidl nfsio
96671 427491 0 0 3 0x14280 nfsidl nfsio
48395 191094 0 0 3 0x14280 nfsidl nfsio
7284 294449 0 0 3 0x14280 nfsidl nfsio
98026 355252 0 0 3 0x14280 nfsidl nfsio
58365 37836 0 0 3 0x14280 nfsidl nfsio
47099 145362 0 0 3 0x14280 nfsidl nfsio
92931 200730 0 0 3 0x14280 nfsidl nfsio
43594 247699 0 0 3 0x14280 nfsidl nfsio
37644 334620 0 0 3 0x14280 nfsidl nfsio
25208 336665 0 0 3 0x14280 nfsidl nfsio
90922 362139 0 0 3 0x14280 nfsidl nfsio
67830 357951 0 0 3 0x14280 nfsidl nfsio
75518 330188 0 0 3 0x14280 nfsidl nfsio
75190 90965 0 0 3 0x14280 nfsidl nfsio
73055 64474 0 0 3 0x14280 nfsidl nfsio
93175 332372 0 0 3 0x14280 nfsidl nfsio
66185 77137 0 0 3 0x14280 nfsidl nfsio
51320 346101 0 0 3 0x14280 nfsidl nfsio
69052 358289 0 0 3 0x14200 bored sosplice
39008 96959 90907 0 3 0x82 piperd syz-executor.2
90907 263776 71848 0 3 0x82 thrsleep syz-fuzzer
90907 172353 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 396137 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 407783 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 34626 71848 0 3 0x4000082 kqread syz-fuzzer
90907 328986 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 198163 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 349376 71848 0 3 0x4000082 thrsleep syz-fuzzer
90907 518397 71848 0 3 0x4000082 thrsleep syz-fuzzer
71848 143218 79048 0 3 0x10008a sigsusp ksh
79048 421921 14926 0 3 0x9a kqread sshd
14926 265503 1 0 3 0x88 kqread sshd
7753 515567 26242 73 3 0x1100090 kqread syslogd
26242 482600 1 0 3 0x100082 netio syslogd
46949 89457 1 0 3 0x100080 kqread resolvd
38004 194443 56376 77 3 0x100092 kqread dhcpleased
93919 32602 56376 77 3 0x100092 kqread dhcpleased
56376 437886 1 0 3 0x80 kqread dhcpleased
45551 518308 0 0 3 0x14200 bored smr
91826 266654 0 0 2 0x14200 zerothread
89660 156001 0 0 3 0x14200 aiodoned aiodoned
17314 87907 0 0 3 0x14200 syncer update
137 458406 0 0 3 0x14200 cleaner cleaner
65362 6419 0 0 3 0x14200 reaper reaper
68017 183700 0 0 3 0x14200 pgdaemon pagedaemon
39218 442289 0 0 3 0x14200 bored viomb
19975 95523 0 0 3 0x40014200 acpi0 acpi0
72984 250174 0 0 3 0x14200 bored softnet
57300 85980 0 0 3 0x14200 bored systqmp
46581 361770 0 0 3 0x14200 bored systq
43910 95438 0 0 3 0x40014200 bored softclock
64834 284931 0 0 3 0x40014200 idle0
1 127049 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 10206 6444K 6896K 78643K 32947 0
pcb 13 16K 18K 78643K 1328 0
rtable 240 16K 17K 78643K 8105 0
ifaddr 97 20K 21K 78643K 2326 0
sysctl 3 1K 1K 78643K 3 0
counters 28 17K 17K 78643K 125 0
ioctlops 0 0K 4K 78643K 12969 0
iov 0 0K 32K 78643K 2132 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1330 83K 84K 78643K 22985 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 9K 78643K 111 0
VM map 2 0K 0K 78643K 2 0
sem 10 1K 1K 78643K 16 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 12 41K 69K 78643K 19886 0
sigio 0 0K 0K 78643K 185 0
proc 60 55K 71K 78643K 1687 0
subproc 104 6K 6K 78643K 498 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 1577 0
in_multi 95 6K 6K 78643K 683 0
ether_multi 1 0K 0K 78643K 87 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 235 1049K 1049K 78643K 235 0
exec 0 0K 2K 78643K 2303 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 426 579K 581K 78643K 241512 0
UVM aobj 131 9K 9K 78643K 131 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 452 0
NDP 14 0K 2K 78643K 200 0
temp 144 4721K 5081K 78643K 85516 0
kqueue 12 18K 28K 78643K 1142 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 360 0 357 3 2 1 2 0 8 0
rtentry 112 551 0 447 4 0 4 4 0 8 0
unpcb 136 14315 0 14300 72 71 1 6 0 8 0
syncache 296 23 0 23 7 7 0 1 0 8 0
tcpqe 32 7 0 7 3 3 0 1 0 8 0
tcpcb 736 9512 0 9507 204 200 4 17 0 8 3
arp 88 90 0 71 1 0 1 1 0 8 0
ipq 40 14 0 13 7 6 1 1 0 8 0
ipqe 40 44 0 43 7 6 1 1 0 8 0
inpcb 312 14230 0 14223 173 167 6 11 0 8 5
rttmr 72 13 0 13 4 4 0 1 0 8 0
ip6q 72 5 0 5 3 2 1 1 0 8 1
ip6af 40 8 0 8 2 1 1 1 0 8 1
nd6 48 142 0 117 1 0 1 1 0 8 0
pkpcb 40 63 0 63 7 7 0 1 0 8 0
kcovpl 48 38 0 30 1 0 1 1 0 8 0
ppxss 1152 35 0 35 9 9 0 1 0 8 0
pfrktable 1344 3092 0 3090 3 2 1 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfstitem 24 2 0 0 1 0 1 1 0 8 0
pfstkey 112 8 0 6 1 0 1 1 0 8 0
pfstate 320 4 0 3 1 0 1 1 0 8 0
pfrule 1360 682 0 653 8 5 3 7 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 2561 0 2143 50 23 27 29 0 8 0
art_table 32 2562 0 2143 4 0 4 4 0 8 0
art_node 16 550 0 457 1 0 1 1 0 8 0
sysvmsgpl 40 76 0 39 2 1 1 1 0 8 0
semupl 112 5 0 5 1 1 0 1 0 8 0
semapl 112 8 0 0 1 0 1 1 0 8 0
shmpl 112 128 0 0 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 40946 0 39477 92 0 92 92 0 8 0
ffsino 240 40946 0 39477 87 0 87 87 0 8 0
nchpl 144 76450 0 74834 62 0 62 62 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 224 5926 0 0 349 0 349 349 0 8 0
namei 1024 292719 0 292718 3 2 1 2 0 8 0
vcpupl 1984 105 0 3 14 1 13 13 0 8 0
vmpool 528 155 0 53 8 1 7 7 0 8 0
pfiaddrpl 120 780 0 780 3 3 0 1 0 8 0
scsiplug 72 4 0 4 2 2 0 1 0 8 0
scxspl 216 138663 0 138661 25 24 1 8 0 8 0
plimitpl 152 1176 0 1161 1 0 1 1 0 8 0
sigapl 424 20134 0 20076 8 0 8 8 0 8 0
futexpl 64 291120 0 291120 1 0 1 1 0 8 1
knotepl 120 216370 0 216290 69 62 7 8 0 8 4
kqueuepl 184 8676 0 8666 41 40 1 4 0 8 0
pipepl 304 2392 0 2364 73 70 3 8 0 8 0
fdescpl 432 20099 0 20076 4 0 4 4 0 8 0
filepl 120 215234 0 214987 169 156 13 16 0 8 5
lockfpl 104 7560 0 7558 9 8 1 2 0 8 0
lockfspl 48 2583 0 2581 1 0 1 1 0 8 0
sessionpl 144 54 0 38 1 0 1 1 0 8 0
pgrppl 48 127 0 111 1 0 1 1 0 8 0
ucredpl 96 85865 0 85849 1 0 1 1 0 8 0
zombiepl 144 20076 0 20076 2 1 1 1 0 8 1
processpl 1000 20134 0 20076 11 2 9 9 0 8 0
procpl 672 49004 0 48935 45 37 8 9 0 8 0
sosppl 168 95 0 95 20 20 0 1 0 8 0
sockpl 448 28969 0 28944 355 344 11 26 0 8 8
mcl64k 65536 461 0 461 40 39 1 1 0 8 1
mcl16k 16384 125 0 125 32 31 1 1 0 8 1
mcl12k 12288 649 0 649 36 35 1 1 0 8 1
mcl9k 9216 244 0 244 38 37 1 1 0 8 1
mcl8k 8192 4332 0 4332 11 10 1 1 0 8 1
mcl4k 4096 2455 0 2455 11 10 1 1 0 8 1
mcl2k2 2112 121 0 121 30 29 1 1 0 8 1
mcl2k 2048 117952 0 117873 36 24 12 20 0 8 0
mtagpl 96 2114 0 1862 25 18 7 9 0 8 0
mbufpl 256 304198 0 303734 86 54 32 40 0 8 0
bufpl 288 30324 0 23916 458 0 458 458 0 8 0
anonpl 24 5415894 0 5395392 358 203 155 157 0 188 13
amapchunkpl 152 577875 0 577161 126 91 35 47 0 158 0
amappl16 200 53307 0 52517 226 175 51 55 0 8 8
amappl15 192 3869 0 3864 1 0 1 1 0 8 0
amappl14 184 7086 0 7075 1 0 1 1 0 8 0
amappl13 176 2539 0 2537 1 0 1 1 0 8 0
amappl12 168 1610 0 1602 2 1 1 1 0 8 0
amappl11 160 1440 0 1427 1 0 1 1 0 8 0
amappl10 152 3083 0 3082 3 2 1 1 0 8 0
amappl9 144 1905 0 1901 1 0 1 1 0 8 0
amappl8 136 3353 0 3240 5 0 5 5 0 8 1
amappl7 128 2273 0 2260 1 0 1 1 0 8 0
amappl6 120 1729 0 1704 2 1 1 2 0 8 0
amappl5 112 18106 0 18095 1 0 1 1 0 8 0
amappl4 104 7332 0 7279 2 0 2 2 0 8 0
amappl3 96 3432 0 3419 1 0 1 1 0 8 0
amappl2 88 7409 0 7353 3 1 2 3 0 8 0
amappl1 80 357994 0 357489 19 6 13 18 0 8 0
amappl 88 239947 0 239720 7 0 7 7 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 72 130 0 0 3 0 3 3 0 8 0
uaddrrnd 24 20254 0 20129 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 20254 0 20129 1 0 1 1 0 8 0
vmmpekpl 168 126797 0 126723 4 0 4 4 0 8 0
vmmpepl 168 1786898 0 1784275 335 189 146 169 0 357 6
vmsppl 272 20253 0 20129 9 0 9 9 0 8 0
rwobjpl 24 424386 0 416543 53 3 50 50 0 8 0
pdppl 4096 40514 0 40360 823 657 166 166 0 8 12
pvpl 32 8837518 0 8815082 626 397 229 259 0 265 27
pmappl 216 20253 0 20129 8 0 8 8 0 8 0
extentpl 40 58 0 38 1 0 1 1 0 8 0
phpool 112 2485 0 1568 27 0 27 27 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline]
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315
sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173
syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffdae60, count: -15
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825639e0) at panic+0x161 sys/kern/subr_prf.c:202
__assert(ffffffff825d3680,ffffffff825ebe3f,eb,ffffffff82609dde) at __assert+0x25 sys/kern/subr_prf.c:161
buf_unmap(fffffd807d64b140) at buf_unmap+0x1a8 sys/kern/vfs_biomem.c:235
buf_map(fffffd8066fd2c60) at buf_map+0x1b7 sys/kern/vfs_biomem.c:117
buf_get(fffffd8069caf468,26,4000) at buf_get+0x739 sys/kern/vfs_bio.c:1182
getblk(fffffd8069caf468,26,4000,0,ffffffffffffffff) at getblk+0xfd sys/kern/vfs_bio.c:1050
ffs2_balloc(fffffd80647d06a0,98000,26,fffffd807f7d8900,1,ffff80002e8df1f8) at ffs2_balloc+0x156d sys/ufs/ffs/ffs_balloc.c:736
ffs_write(ffff80002e8df290) at ffs_write+0x411 sys/ufs/ffs/ffs_vnops.c:349
VOP_WRITE(fffffd8069caf468,ffff80002e8df340,3,fffffd807f7d8900) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000216647e0,fffffd8069caf468,fffffd807f7d8900,ffff80002e8df400,ffff80002e8df3e0) at ktrwriteraw+0x13d sys/kern/kern_ktrace.c:666
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f ktrwrite2 sys/kern/kern_ktrace.c:631 [inline]
ktrstruct(ffff8000216647e0,ffffffff8254f2dd,ffff80002e8df4b8,10) at ktrstruct+0x16f sys/kern/kern_ktrace.c:315
sys_clock_gettime(ffff8000216647e0,ffff80002e8df520,ffff80002e8df580) at sys_clock_gettime+0xfb sys/kern/kern_time.c:173
syscall(ffff80002e8df5f0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffdae60, count: -15
---
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.
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syzbot
Aug 19, 2022, 1:45:23 PM8/19/22
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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