assert failed: vp->v_type == VREG

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 11eef5b2ee47 Clear per-lwp entries whose mount is gone bef..
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14b464a4c00000
dashboard link: https://syzkaller.appspot.com/bug?extid=d66b1be08516a4d2d2b2

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+d66b1b...@syzkaller.appspotmail.com

[ 57.6564813] panic: kernel diagnostic assertion "vp->v_type == VREG"
failed:
file "/syzkaller/managers/netbsd/kernel/sys/ufs/ufs/ufs_readwrite.c", line
292
[ 57.6564813] cpu0: Begin traceback...
[ 57.6676039] vpanic() at netbsd:vpanic+0x214
[ 57.6676039] _GLOBAL__sub_D_65535_0_cpu_configure() at
netbsd:_GLOBAL__sub_D_65535_0_cpu_configure
[ 57.6787319] ffs_write() at netbsd:ffs_write+0x6ba
[ 57.6787319] VOP_WRITE() at netbsd:VOP_WRITE+0xc3
[ 57.6898607] vn_write() at netbsd:vn_write+0x167
[ 57.7013290] dofilewrite() at netbsd:dofilewrite+0x154
[ 57.7131806] sys_write() at netbsd:sys_write+0x78
[ 57.7243604] sys___syscall() at netbsd:sys___syscall+0xe2
[ 57.7454991] syscall() at netbsd:syscall+0x30e
[ 57.7454991] --- syscall (number 198) ---
[ 57.7572429] 79a33163f4aa:
[ 57.7572429] cpu0: End traceback...

[ 57.7572429] dumping to dev 4,1 (offset=0, size=0): not possible
[ 57.7572429] rebooting...
SeaBIOS (version 1.8.2-20181029_212248-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 0x000f2a00: 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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/ - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | WARNING: couldn't
open /var/db/entropy-file
WARNING: 1 module failed to load


---
This bug 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.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.

[syzbot]

syzbot has found a reproducer for the following crash on:

HEAD commit: 5eba7b0ad839 Fix typo in kcov.h
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=107376e0c00000
dashboard link: https://syzkaller.appspot.com/bug?extid=d66b1be08516a4d2d2b2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=157c5704c00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14e4ffd4c00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+d66b1b...@syzkaller.appspotmail.com

login: [ 38.7521678] panic: kernel diagnostic assertion "vp->v_type ==

VREG" failed:
file "/syzkaller/managers/netbsd/kernel/sys/ufs/ufs/ufs_readwrite.c", line
292

[ 38.7521678] cpu0: Begin traceback...
[ 38.7521678] vpanic() at netbsd:vpanic+0x214
[ 38.7632748] _GLOBAL__sub_D_65535_0_cpu_configure() at
netbsd:_GLOBAL__sub_D_65535_0_cpu_configure
[ 38.7632748] ffs_write() at netbsd:ffs_write+0x6ba
[ 38.7744002] VOP_WRITE() at netbsd:VOP_WRITE+0xc3
[ 38.7855251] vn_write() at netbsd:vn_write+0x167
[ 38.7855251] dofilewrite() at netbsd:dofilewrite+0x154
[ 38.7974078] sys_write() at netbsd:sys_write+0x78
[ 38.8087170] sys_syscall() at netbsd:sys_syscall+0xe2
[ 38.8189043] syscall() at netbsd:syscall+0x30e
[ 38.8189043] --- syscall (number 0) ---
[ 38.8316164] 7c6915a3f4ca:
[ 38.8316164] cpu0: End traceback...

[ 38.8316164] dumping to dev 4,1 (offset=0, size=0): not possible
[ 38.8316164] rebooting...
SeaBIOS (version 1.8.2-20190204_181744-google)