panic: sbflush_internal: ccc 0 mb 0 mbcnt 256

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 5d2bb169 Remove extra spaces.
git tree: freebsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12ce646d200000
dashboard link: https://syzkaller.appspot.com/bug?extid=8af1046468044737c72d

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+8af104...@syzkaller.appspotmail.com

panic: sbflush_internal: ccc 0 mb 0 mbcnt 256
cpuid = 1
time = 134217778
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame
0xfffffe001f5b1730
vpanic() at vpanic+0x1e0/frame 0xfffffe001f5b1790
panic() at panic+0x43/frame 0xfffffe001f5b17f0
sbrelease_internal() at sbrelease_internal+0x174/frame 0xfffffe001f5b1830
solisten_proto() at solisten_proto+0xc6/frame 0xfffffe001f5b1890
sctp_listen() at sctp_listen+0x4eb/frame 0xfffffe001f5b1900
solisten() at solisten+0x7a/frame 0xfffffe001f5b1940
kern_listen() at kern_listen+0x132/frame 0xfffffe001f5b1980
amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe001f5b1ab0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001f5b1ab0
--- syscall (198, FreeBSD ELF64, nosys), rip = 0x412e5a, rsp =
0x7fffdffdcf38, rbp = 0x2 ---
KDB: enter: panic
[ thread pid 2575 tid 100480 ]
Stopped at kdb_enter+0x6a: movq $0,kdb_why


---
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[syzbot]

syzbot has found a reproducer for the following crash on:

HEAD commit: 5d2bb169 Remove extra spaces.
git tree: freebsd

console output: https://syzkaller.appspot.com/x/log.txt?x=11befcef200000
dashboard link: https://syzkaller.appspot.com/bug?extid=8af1046468044737c72d
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=128759cf200000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+8af104...@syzkaller.appspotmail.com

login: panic: sbflush_internal: ccc 0 mb 0 mbcnt 256
cpuid = 0
time = 1553010895

KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame

0xfffffe00212d6730
vpanic() at vpanic+0x1e0/frame 0xfffffe00212d6790
panic() at panic+0x43/frame 0xfffffe00212d67f0
sbrelease_internal() at sbrelease_internal+0x174/frame 0xfffffe00212d6830
solisten_proto() at solisten_proto+0xc6/frame 0xfffffe00212d6890
sctp_listen() at sctp_listen+0x4eb/frame 0xfffffe00212d6900
solisten() at solisten+0x7a/frame 0xfffffe00212d6940
kern_listen() at kern_listen+0x132/frame 0xfffffe00212d6980
amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe00212d6ab0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00212d6ab0

--- syscall (198, FreeBSD ELF64, nosys), rip = 0x412e5a, rsp =
0x7fffdffdcf38, rbp = 0x2 ---
KDB: enter: panic

[ thread pid 1327 tid 100238 ]

[syzbot]

syzbot has found a reproducer for the following crash on:

HEAD commit: 62dd3c74 powerpc: Drop OPAL_HANDLE_HMI2 for now, to avoid ..
git tree: freebsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14cdecc2a00000
dashboard link: https://syzkaller.appspot.com/bug?extid=8af1046468044737c72d
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17b68cfca00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=162a75b8a00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+8af104...@syzkaller.appspotmail.com

login: panic: sbflush_internal: ccc 0 mb 0 mbcnt 256
cpuid = 0
time = 1556816630

KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame

0xfffffe0021231730
vpanic() at vpanic+0x1e0/frame 0xfffffe0021231790
panic() at panic+0x43/frame 0xfffffe00212317f0
sbrelease_internal() at sbrelease_internal+0x174/frame 0xfffffe0021231830
solisten_proto() at solisten_proto+0xc6/frame 0xfffffe0021231890
sctp_listen() at sctp_listen+0x4eb/frame 0xfffffe0021231900
solisten() at solisten+0x7a/frame 0xfffffe0021231940
kern_listen() at kern_listen+0x132/frame 0xfffffe0021231980
amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe0021231ab0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0021231ab0
--- syscall (0, FreeBSD ELF64, nosys), rip = 0x45772a, rsp =
0x7fffdfffdf88, rbp = 0x6b60c8 ---
KDB: enter: panic
[ thread pid 759 tid 100103 ]

[Mark Johnston]

#syz invalid

The reproducer segfaults and the bug hasn't been reported in a long
time.