syzbot


witness: reversal: sbufsnd inode (3)

Status: upstream: reported on 2025/06/11 00:46
Reported-by: syzbot+33baec04e0ac2123f367@syzkaller.appspotmail.com
First crash: 35d, last: 6d04h
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd witness: reversal: sbufsnd inode (2) -1 19 98d 149d 0/3 auto-obsoleted due to no activity on 2025/05/28 20:57
openbsd witness: reversal: sbufsnd inode -1 4 268d 334d 0/3 auto-obsoleted due to no activity on 2025/01/18 21:43

Sample crash report:
witness: lock order reversal:
 1st 0xffff800010fdca70 sbufsnd (&so->so_snd.sb_lock)
 2nd 0xfffffd806e0c32e0 inode (&ip->i_lock)
SYZFAIL: failed to recv rpc
fd=3 want=4 recv=0 n=-1 (errno 54: Connection reset by peer)


OpenBSD/amd64 (Amnesiac) (tty00)

login: uvn_flush: obj=0xfffffd806e21f5c0, offset=0x3fe000.  error during pageout.
uvn_flush: WARNING: changes to page may be lost!
set $lines = 0
Password:
Login incorrect
login: show panic
Password:
Login incorrect
login: show registers
Password:uvn_flush: obj=0xfffffd806e21f390, offset=0x3ff000.  error during pageout.
uvn_flush: WARNING: changes to page may be lost!

Login incorrect
login: ps
Password:
Login incorrect
show malloc
login: Password:
Login incorrect

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/10 01:51 openbsd e91e1a12e0dd 956bd956 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: sbufsnd inode
2025/06/13 05:33 openbsd 97ee8abe534f 98683f8f .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: sbufsnd inode
2025/06/11 00:45 openbsd a3912f8462f6 5d7e17ca .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: sbufsnd inode
* Struck through repros no longer work on HEAD.