[Bug 262587] panic: lock (sleep mutex) umtxql not locked @ /usr/src/sys/sys/umtxvar.h:262 on 14-current master-n253798-8cdecdecb43
Date: Thu, 17 Mar 2022 16:06:14 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=262587
Mark Johnston <markj@FreeBSD.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |markj@FreeBSD.org
Status|New |Open
--- Comment #2 from Mark Johnston <markj@FreeBSD.org> ---
(In reply to Masachika ISHIZUKA from comment #0)
The panic is:
panic: lock (sleep mutex) umtxql not locked @ /usr/src/sys/sys/umtxvar.h:262
cpuid = 2
time = 1647416763
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0101153c00
vpanic() at vpanic+0x17f/frame 0xfffffe0101153c50
panic() at panic+0x43/frame 0xfffffe0101153cb0
witness_unlock() at witness_unlock+0x144/frame 0xfffffe0101153cf0
__mtx_unlock_flags() at __mtx_unlock_flags+0x4d/frame 0xfffffe0101153d20
linux_sys_futex() at linux_sys_futex+0x5e1/frame 0xfffffe0101153e00
amd64_syscall() at amd64_syscall+0x12e/frame 0xfffffe0101153f30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0101153f30
--- syscall (202, Linux ELF64, linux_sys_futex), rip = 0x803a0ba35, rsp =
0x8061d0c90, rbp = 0x8061d0dc0 ---
I'm not sure which call to umtxq_unlock() this corresponds to.
There are no changes to the linuxulator in that range of revisions, but your
version string is "master-n253798-8cdecdecb43-dirty", so you have some local
changes. Any in the linuxulator? If not, please try installing gdb and
running:
# kgdb -q
(kgdb) list *linux_sys_futex+0x5e1
and show the output.
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