assert failed: so->so_pcb == NULL

[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=10508314c00000
dashboard link: https://syzkaller.appspot.com/bug?extid=7bace612ca3cc3e124f8

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+7bace6...@syzkaller.appspotmail.com

login: [ 75.3564049] panic: kernel diagnostic assertion "so->so_pcb ==
NULL" failed:
file "/syzkaller/managers/netbsd/kernel/sys/kern/uipc_socket.c", line 567
[ 75.3606885] cpu1: Begin traceback...
[ 75.3606885] vpanic() at netbsd:vpanic+0x214
[ 75.3692578] _GLOBAL__sub_D_65535_0_cpu_configure() at
netbsd:_GLOBAL__sub_D_65535_0_cpu_configure
[ 75.3778249] socreate() at netbsd:socreate+0x35c
[ 75.3863928] fsocreate() at netbsd:fsocreate+0x19c
[ 75.3949633] sys___socket30() at netbsd:sys___socket30+0x96
[ 75.4078149] sys___syscall() at netbsd:sys___syscall+0xe2
[ 75.4206684] syscall() at netbsd:syscall+0x30e
[ 75.4249539] --- syscall (number 198) ---
[ 75.4335189] 7f368e83f4aa:
[ 75.4335189] cpu1: End traceback...

[ 75.4378019] dumping to dev 4,1 (offset=0, size=0): not possible
[ 75.4420859] 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: 11eef5b2ee47 Clear per-lwp entries whose mount is gone bef..
git tree: netbsd

console output: https://syzkaller.appspot.com/x/log.txt?x=1545ce70c00000
dashboard link: https://syzkaller.appspot.com/bug?extid=7bace612ca3cc3e124f8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1788d4a4c00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=139e470ac00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+7bace6...@syzkaller.appspotmail.com

login: [ 26.7063438] panic: kernel diagnostic assertion "so->so_pcb ==

NULL" failed:
file "/syzkaller/managers/netbsd/kernel/sys/kern/uipc_socket.c", line 567

[ 26.7189776] cpu1: Begin traceback...
[ 26.7189776] vpanic() at netbsd:vpanic+0x214
[ 26.7189776] _GLOBAL__sub_D_65535_0_cpu_configure() at
netbsd:_GLOBAL__sub_D_65535_0_cpu_configure
[ 26.7314576] socreate() at netbsd:socreate+0x35c
[ 26.7314576] fsocreate() at netbsd:fsocreate+0x19c
[ 26.7439436] sys___socket30() at netbsd:sys___socket30+0x96
[ 26.7565253] sys_syscall() at netbsd:sys_syscall+0xe2
[ 26.7689556] syscall() at netbsd:syscall+0x30e
[ 26.7689556] --- syscall (number 0) ---
[ 26.7814657] 73e23603f4ca:
[ 26.7814657] cpu1: End traceback...

[ 26.7814657] dumping to dev 4,1 (offset=0, size=0): not possible
[ 26.7939499] rebooting...