witness: reversal: fdlock inode (3)

Status: upstream: reported on 2026/07/01 23:17
Reported-by: syzbot+4f1b7ffbc5e341cce754@syzkaller.appspotmail.com
First crash: 79d, last: 30d
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd witness: reversal: fdlock inode (2) -1 7 240d 329d 0/4 auto-obsoleted due to no activity on 2026/04/22 03:55
openbsd witness: reversal: fdlock inode -1 4 458d 586d 0/4 auto-obsoleted due to no activity on 2025/09/15 07:18

Sample crash report:
witness: lock order reversal:
 1st 0xffff800035bab0f0 fdlock (&newfdp->fd_fd.fd_lock)
 2nd 0xfffff6007036ce98 inode (&ip->i_lock)


OpenBSD/amd64 (ci-openbsd-multicore-0.us-central1-b.c.syzkaller.internal) (tty00)

login: set $lines = 0
Password:
Login incorrect
login: show panic
Password:
Login incorrect
login: trace
Password:
Login incorrect
login: show proc
Password:
Login incorrect
show all locks
login: Password:
Login incorrect
show all pools
login: Password:
Login incorrect
trace
login: Password:
Login incorrect
trace

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/19 10:57 openbsd aeb4a173c2e6 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: fdlock inode
2026/08/01 22:48 openbsd 59ec3ab4d107 e611ffe1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: fdlock inode
2026/07/14 19:42 openbsd ddde2be8d3c6 2130f682 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: fdlock inode
2026/07/01 23:16 openbsd 927838563536 5fb9973c .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: fdlock inode
* Struck through repros no longer work on HEAD.