page fault in WARNING: SPL NOT LOWERED OdNo _SsyYSsC_AaLcLce 1p t4

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 014f8a6c revert most of:
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14b5e0d8a00000
dashboard link: https://syzkaller.appspot.com/bug?extid=d972806a8df6b26ae526

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+d97280...@syzkaller.appspotmail.com

[ 79.4917597] fatal page fault in supervisor mode
[ 79.5032530] trap type 6 code 0x2 rip 0xffffffff8022b64c cs 0x8 rflags
0x10246 cr2 0 ilevel 0 rsp 0xffff98816f127ae8
[ 79.5136715] curlwp 0xffff98801306da20 pid 3654.2 lowest kstack
0xffff98816f1202c0
[ 79.5136715] panic: trap
[ 79.5230370] cpu0: Begin traceback...
[ 79.5230370] vpanic() at netbsd:vpanic+0x214
[ 79.5317959] snprintf() at netbsd:snprintf
[ 79.5423405] startlwp() at netbsd:startlwp
[ 79.5518175] alltraps() at netbsd:alltraps+0xb2
[ 79.5518175] WARNING: SPL NOT LOWERED OdNo _SsyYSsC_AaLcLce 1p t4() E
XaItT 0 7
[ [ 79 .795.65186215822]52 W]A RneNItNbGs:d: dSPoL_s NyOsT_
aLcOcWepERtE+D0 xO2Nf 4S
[ 79.5618252] YSCALL 60 3 EXIT 0 7
[ [ 7 979.5.651681825225]2] W AsRyNsI_aNGc:c eSpPtL( ) NOaTt LOWERED nONe
tSbYsSdC:sALyLs _3a1cc44ep -t3+0006x5ac34
[ 79.5618252] 24 EXIT 0 7
[ 79.5618252] [ WA 7RN9I.N56G:1 82S5P2L] NOsTy sL_O__WsEyREsDc alONl( T)R
aAtP EXIT 6 0[

[ 79 7.596.5186215822]5 2]n etWbAsRNId:NsGy: sS__PL_s yNOsTc
alLlO+WE0xReE2D

[ 79.5618252] ON TRAP EXIT 6 0
[ 79.5618252] syscall() at netbsd:syscall+0x348
[ 79.5618252] --- syscall (number 198) ---
[ 79.5618252] 71e07b23f4aa:
[ 79.5618252] cpu0: End traceback...

[ 79.5618252] dumping to dev 4,1 (offset=0, size=0): not possible
[ 79.5618252] 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