page fault in do_sys_WAacRNceIpNtG:

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 9c2e192a Don't build compat LLVM PIC libraries since it is..
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=112d74d8a00000
dashboard link: https://syzkaller.appspot.com/bug?extid=9bfb3e8c379029066bce

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+9bfb3e...@syzkaller.appspotmail.com

[ 2554.7188087] fatal page fault in supervisor mode
[ 2554.7188087] trap type 6 code 0x2 rip 0xffffffff8022b64c cs 0x8 rflags
0x10246 cr2 0 ilevel 0 rsp 0xffffc0016ec1bae8
[ 2554.7339093] curlwp 0xffffc00012fe99c0 pid 3682.2 lowest kstack
0xffffc0016ec142c0
[ 2554.7414549] panic: trap
[ 2554.7414549] cpu0: Begin traceback...
[ 2554.7414549] WARNING: SPL NOT LOWERED ON SYSCALL 56 249 EXIT
cv7pca1n0i6cb(0) 7a
t
[ [ 22555544.7.7448844994422]] WARNING: SnPetL bNsOd:Tv LpOaWnEiRc+ED0
x2ON1 4S
[
2554.7484942] YSCALL 0 -459088 EXIT 1ae106b0 7sn
[[ 2 525554.4.77448844994422] ]p WrAiRnNtfIN()G: atS PL NOT LOWnERetEDbs
dON:s SnYpSrCiAntLLf
[ 2554.7484942] 0 -6115664 EXIT 81e106b0 7
[
2554.7484942] startlwp() at netbsd:startlwp
[ 2554.7484942] alltraps() at netbsd:alltraps+0xb2
[ 2554.7484942] do_sys_WAacRNceIpNtG:() S PatL NOT LOWERnEDet ObNs
dS:dYSoC_AsyLLs _0a c-c6e1pt16+009x62 f4E[

2554.7484942] XIT 81e106b0 7
[ 2554.7484942] sys_accept() at netbsd:sys_accept+0xac
[ 2554.7484942] [W 2A5R5NI4N.G7:48 4S9P4L 2]NO Ts yLsO_W__ERsyEDsc OaNl
lS()YS aCAtL L 0 -21052ne22t9bs2d0 :EsXyIsT__ 8_s28ys4dc8a0l0l+ 07x
[
2554.7484942] e2
[ 2554.7484942] syscall() at netbsd:syscall+0x348
[ 2554.7484942] --- syscall (number 198) ---
[ 2554.7484942] 73b9fa23f4aa:
[ 2554.7484942] cpu0: End traceback...

[ 2554.7484942] dumping to dev 4,1 (offset=0, size=0): not possible
[ 2554.7484942] rebooting...
SeaBIOS (version 1.8.2-20190308_060531-google)
Total RAM Size = 0x00000001e0000000 = 7680 MiB
CPUs found: 2 Max CPUs supported: 2
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0
removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f29d0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Booting from Hard Disk 0...

>> NetBSD/x86 BIOS Boot, Revision 5.10 (Tue Jul 17 14:59:51 UTC 2018) (from
>> NetBSD 8.0)
>> Memory: 639/3144640 k

1. Boot normally
2. Boot single user
3. Disable ACPI
4. Disable ACPI and SMP
5. Drop to boot prompt


---
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[Maxime Villard]

#syz dup: page fault in do_sys_accept