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panic: Bad link elm ADDR prev->next != elm (3)

Status: fixed on 2022/02/03 16:54
Reported-by: syzbot+36e6be9e02735fe66ca8@syzkaller.appspotmail.com
Fix commit: b84ed4e7f626 filemon: Reject FILEMON_SET_FD commands when the fd is a kqueue
First crash: 426d, last: 374d
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
freebsd panic: Bad link elm ADDR prev->next != elm (2) 8 505d 516d 2/2 fixed on 2021/09/19 21:04
freebsd panic: Bad link elm ADDR prev->next != elm C 1224 519d 1104d 0/2 closed as dup on 2021/09/07 22:45

Sample crash report:
panic: Bad link elm 0xfffffe0053f36000 prev->next != elm
cpuid = 1
time = 271
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffFssh_packet_write_wait: Connection to 216.239.38.127 port 9600: Broken pipe

Crashes (8):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-freebsd-main 2022/01/28 03:14 freebsd-src 548a2ec49bd4 64a8e201 console log report panic: Bad link elm ADDR prev->next != elm
ci-freebsd-main 2022/01/27 02:42 freebsd-src d35991d32774 2cbffd88 console log report panic: Bad link elm ADDR prev->next != elm
ci-freebsd-main 2022/01/15 09:40 freebsd-src de1292c6ff8a 723cfaf0 console log report panic: Bad link elm ADDR prev->next != elm
ci-freebsd-main 2022/01/05 16:13 freebsd-src ce1e5d0d5e60 6acc789a console log report panic: Bad link elm ADDR prev->next != elm
ci-freebsd-main 2022/01/01 14:45 freebsd-src 398c88c7582a e1768e9c console log report panic: Bad link elm ADDR prev->next != elm
ci-freebsd-main 2021/12/26 05:38 freebsd-src 9a6201ac2ff2 6caa12e4 console log report panic: Bad link elm ADDR prev->next != elm
ci-freebsd-main 2021/12/07 04:00 freebsd-src dabd8bf9145a 0230ba3e console log report panic: Bad link elm ADDR prev->next != elm
ci-freebsd-i386 2022/01/18 14:28 freebsd-src 779fd0534466 731a2d23 console log report panic: Bad link elm ADDR prev->next != elm
* Struck through repros no longer work on HEAD.