Hello,
syzbot found the following issue on:
HEAD commit: 5cd0c9a55ccf note the -c runs sh -c; from nabijaczleweli
git tree: openbsd
console output:
https://syzkaller.appspot.com/x/log.txt?x=119c8e4fb00000
kernel config:
https://syzkaller.appspot.com/x/.config?x=fe55924c11e64b0a
dashboard link:
https://syzkaller.appspot.com/bug?extid=809c477e1b7e173196f7
syz repro:
https://syzkaller.appspot.com/x/repro.syz?x=16a55b0bb00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+809c47...@syzkaller.appspotmail.com
login: kernel: protection fault trap, code=0
Stopped at ktrops+0x4a: movq 0x8(%rbx),%r14
ddb>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
the kernel did not panic
ddb> trace
ktrops(ffff80002166fa40,dead4110dead4110,0,80001108,fffffd806c5bad30,fffffd807f7d8600) at ktrops+0x4a ktrcanset sys/kern/kern_ktrace.c:702 [inline]
ktrops(ffff80002166fa40,dead4110dead4110,0,80001108,fffffd806c5bad30,fffffd807f7d8600) at ktrops+0x4a sys/kern/kern_ktrace.c:547
doktrace(fffffd806c5bad30,4,1108,ffffffff,ffff80002166fa40) at doktrace+0x418 ktrsetchildren sys/kern/kern_ktrace.c:572 [inline]
doktrace(fffffd806c5bad30,4,1108,ffffffff,ffff80002166fa40) at doktrace+0x418 sys/kern/kern_ktrace.c:479
sys_ktrace(ffff80002166fa40,ffff8000216dfb28,ffff8000216dfb80) at sys_ktrace+0xd2 sys/kern/kern_ktrace.c:535
syscall(ffff8000216dfbf0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd2660, count: -5
ddb> show registers
rdi 0xffff80002166fa40
rsi 0xdead4110dead4110
rbp 0xffff8000216df910
rbx 0xdead4110dead4110
rdx 0
rcx 0x80001108 __kernel_virt_to_phys+0x1108
rax 0x1
r8 0xfffffd806c5bad30
r9 0xfffffd807f7d8600
r10 0xab739358940eb9d2
r11 0x828e7f8a3351c75e
r12 0xffff8000ffffd770
r13 0xfffffd807f7d8600
r14 0xffff80002166fa40
r15 0x80001108 __kernel_virt_to_phys+0x1108
rip 0xffffffff8138fbaa ktrops+0x4a
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff8000216df890
ss 0x10
ktrops+0x4a: movq 0x8(%rbx),%r14
ddb> show proc
PROC (syz-executor.3) pid=399154 stat=onproc
flags process=0 proc=0
pri=17, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff80002166f260,0xffff80002166ed30
process=0xffff8000216d33a8 user=0xffff8000216da000, vmspace=0xfffffd806af51120
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
80361 190086 57921 0 2 0 syz-executor.1
*14070 399154 73194 0 7 0 syz-executor.3
73194 25067 63301 0 3 0x82 nanoslp syz-executor.3
26972 222304 63301 0 2 0x2 syz-executor.2
57921 249172 63301 0 3 0x82 nanoslp syz-executor.1
86022 59676 63301 0 2 0x2 syz-executor.0
63301 432264 37904 0 3 0x82 thrsleep syz-execprog
63301 390439 37904 0 2 0x4000082 syz-execprog
63301 355563 37904 0 3 0x4000082 thrsleep syz-execprog
63301 461779 37904 0 3 0x4000082 thrsleep syz-execprog
63301 206473 37904 0 3 0x4000082 thrsleep syz-execprog
63301 209430 37904 0 3 0x4000082 thrsleep syz-execprog
63301 42597 37904 0 2 0x4000002 syz-execprog
37904 127878 97673 0 3 0x10008a sigsusp ksh
97673 29663 99995 0 3 0x9a poll sshd
55224 211026 1 0 3 0x100083 ttyin getty
99995 34112 1 0 3 0x88 poll sshd
57598 267855 23626 73 3 0x100090 kqread syslogd
23626 324636 1 0 3 0x100082 netio syslogd
99675 353103 1 0 3 0x100080 kqread resolvd
18644 99742 39053 77 3 0x100092 kqread dhcpleased
60535 401521 39053 77 3 0x100092 kqread dhcpleased
39053 232537 1 0 3 0x80 kqread dhcpleased
59577 428908 0 0 3 0x14200 bored smr
42386 8576 0 0 3 0x14200 pgzero zerothread
12752 519890 0 0 3 0x14200 aiodoned aiodoned
16040 113270 0 0 3 0x14200 syncer update
46236 38681 0 0 3 0x14200 cleaner cleaner
86532 373908 0 0 3 0x14200 reaper reaper
93511 6221 0 0 3 0x14200 pgdaemon pagedaemon
34899 286140 0 0 3 0x14200 bored viomb
76491 71945 0 0 3 0x40014200 acpi0 acpi0
45017 229776 0 0 3 0x14200 bored softnet
91508 67123 0 0 3 0x14200 bored systqmp
12287 479718 0 0 3 0x14200 bored systq
46234 111602 0 0 3 0x40014200 bored softclock
83761 227146 0 0 3 0x40014200 idle0
1 300561 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 10138 6390K 6412K 78643K 11228 0
pcb 13 8K 8K 78643K 13 0
rtable 150 4K 4K 78643K 234 0
ifaddr 53 12K 12K 78643K 53 0
counters 23 16K 16K 78643K 23 0
ioctlops 0 0K 2K 78643K 29 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1178 74K 74K 78643K 1183 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 0K 0K 78643K 2 0
sem 2 0K 0K 78643K 2 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 8 25K 45K 78643K 154 0
proc 55 54K 79K 78643K 337 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 55 3K 3K 78643K 55 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 25 122K 122K 78643K 25 0
exec 0 0K 2K 78643K 427 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 142 38K 39K 78643K 2207 0
UVM aobj 3 2K 2K 78643K 3 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 15 1K 1K 78643K 15 0
temp 36 4178K 4242K 78643K 3567 0
kqueue 10 14K 14K 78643K 10 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 28 0 25 1 0 1 1 0 8 0
rtentry 112 67 0 1 2 0 2 2 0 8 0
unpcb 136 33 0 20 1 0 1 1 0 8 0
syncache 296 5 0 5 2 1 1 1 0 8 1
tcpcb 736 93 0 6 8 0 8 8 0 8 0
arp 88 10 0 0 1 0 1 1 0 8 0
inpcb 304 124 0 118 1 0 1 1 0 8 0
nd6 48 12 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 276 0 0 18 0 18 18 0 8 0
art_table 32 277 0 0 3 0 3 3 0 8 0
art_node 16 66 0 6 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1606 0 149 92 0 92 92 0 8 0
ffsino 240 1606 0 149 86 0 86 86 0 8 0
nchpl 144 2005 0 383 61 0 61 61 0 8 0
uvmvnodes 80 1615 0 0 33 0 33 33 0 8 0
vnodes 224 1615 0 0 95 0 95 95 0 8 0
namei 1024 5431 0 5430 2 1 1 1 0 8 0
scxspl 216 5674 0 5674 9 1 8 8 0 8 8
plimitpl 152 19 0 9 1 0 1 1 0 8 0
sigapl 424 376 0 344 5 0 5 5 0 8 1
knotepl 112 203 0 155 2 0 2 2 0 8 0
kqueuepl 184 92 0 86 1 0 1 1 0 8 0
pipepl 304 89 0 73 3 1 2 2 0 8 0
fdescpl 432 363 0 344 3 0 3 3 0 8 0
filepl 120 1500 0 1405 3 0 3 3 0 8 0
lockfpl 104 6 0 4 1 0 1 1 0 8 0
lockfspl 48 4 0 2 1 0 1 1 0 8 0
sessionpl 144 21 0 9 1 0 1 1 0 8 0
pgrppl 48 21 0 9 1 0 1 1 0 8 0
ucredpl 96 64 0 54 1 0 1 1 0 8 0
zombiepl 144 344 0 344 2 1 1 1 0 8 1
processpl 1000 376 0 344 5 0 5 5 0 8 0
procpl 672 382 0 344 4 0 4 4 0 8 0
sockpl 448 185 0 163 3 0 3 3 0 8 0
mcl8k 8192 9 0 9 2 1 1 1 0 8 1
mcl4k 4096 5 0 5 2 1 1 1 0 8 1
mcl2k 2048 5318 0 5282 7 2 5 6 0 8 0
mtagpl 96 4 0 4 1 1 0 1 0 8 0
mbufpl 256 9996 0 9809 14 1 13 13 0 8 1
bufpl 288 3617 0 135 249 0 249 249 0 8 0
anonpl 24 45176 0 41307 33 3 30 30 0 188 4
amapchunkpl 152 5066 0 4754 18 1 17 17 0 158 2
amappl16 200 390 0 321 5 0 5 5 0 8 0
amappl15 192 10 0 9 1 0 1 1 0 8 0
amappl14 184 3 0 1 1 0 1 1 0 8 0
amappl13 176 64 0 60 2 1 1 1 0 8 0
amappl12 168 15 0 13 2 1 1 1 0 8 0
amappl11 160 41 0 31 1 0 1 1 0 8 0
amappl10 152 48 0 43 1 0 1 1 0 8 0
amappl9 144 448 0 445 1 0 1 1 0 8 0
amappl8 136 374 0 352 1 0 1 1 0 8 0
amappl7 128 120 0 111 1 0 1 1 0 8 0
amappl6 120 174 0 160 1 0 1 1 0 8 0
amappl5 112 279 0 264 1 0 1 1 0 8 0
amappl4 104 578 0 555 1 0 1 1 0 8 0
amappl3 96 155 0 140 1 0 1 1 0 8 0
amappl2 88 395 0 354 2 0 2 2 0 8 0
amappl1 80 9402 0 8961 14 2 12 12 0 8 2
amappl 88 1905 0 1798 3 0 3 3 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 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 363 0 344 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 363 0 344 1 0 1 1 0 8 0
vmmpekpl 168 7141 0 7122 1 0 1 1 0 8 0
vmmpepl 168 31887 0 30661 74 6 68 68 0 357 13
vmsppl 272 362 0 344 3 1 2 2 0 8 0
rwobjpl 24 10412 0 8066 15 0 15 15 0 8 0
pdppl 4096 733 0 688 79 24 55 55 0 8 10
pvpl 32 177261 0 170329 144 7 137 137 0 265 78
pmappl 216 362 0 344 2 0 2 2 0 8 0
extentpl 40 57 0 38 1 0 1 1 0 8 0
phpool 112 572 0 33 16 0 16 16 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
ktrops(ffff80002166fa40,dead4110dead4110,0,80001108,fffffd806c5bad30,fffffd807f7d8600) at ktrops+0x4a ktrcanset sys/kern/kern_ktrace.c:702 [inline]
ktrops(ffff80002166fa40,dead4110dead4110,0,80001108,fffffd806c5bad30,fffffd807f7d8600) at ktrops+0x4a sys/kern/kern_ktrace.c:547
doktrace(fffffd806c5bad30,4,1108,ffffffff,ffff80002166fa40) at doktrace+0x418 ktrsetchildren sys/kern/kern_ktrace.c:572 [inline]
doktrace(fffffd806c5bad30,4,1108,ffffffff,ffff80002166fa40) at doktrace+0x418 sys/kern/kern_ktrace.c:479
sys_ktrace(ffff80002166fa40,ffff8000216dfb28,ffff8000216dfb80) at sys_ktrace+0xd2 sys/kern/kern_ktrace.c:535
syscall(ffff8000216dfbf0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd2660, count: -5
ddb> machine ddbcpu 1
No such command
ddb> trace
ktrops(ffff80002166fa40,dead4110dead4110,0,80001108,fffffd806c5bad30,fffffd807f7d8600) at ktrops+0x4a ktrcanset sys/kern/kern_ktrace.c:702 [inline]
ktrops(ffff80002166fa40,dead4110dead4110,0,80001108,fffffd806c5bad30,fffffd807f7d8600) at ktrops+0x4a sys/kern/kern_ktrace.c:547
doktrace(fffffd806c5bad30,4,1108,ffffffff,ffff80002166fa40) at doktrace+0x418 ktrsetchildren sys/kern/kern_ktrace.c:572 [inline]
doktrace(fffffd806c5bad30,4,1108,ffffffff,ffff80002166fa40) at doktrace+0x418 sys/kern/kern_ktrace.c:479
sys_ktrace(ffff80002166fa40,ffff8000216dfb28,ffff8000216dfb80) at sys_ktrace+0xd2 sys/kern/kern_ktrace.c:535
syscall(ffff8000216dfbf0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd2660, count: -5
ddb>
---
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