[Bug 293127] Kernel panic __mtx_lock_sleep due to nfsd?

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293127

Gleb Smirnoff <glebius@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |glebius@FreeBSD.org,
                   |                            |rmacklem@FreeBSD.org

--- Comment #1 from Gleb Smirnoff <glebius@FreeBSD.org> ---
Backtrace cleansed of non-printable characters:
(kgdb) bt
#0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:57
#1  doadump (textdump=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:399
#2  0xffffffff80bdad89 in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:519
#3  0xffffffff80bdb297 in vpanic (fmt=0xffffffff8125779c "%s",
    ap=ap@entry=0xfffffe00d5c86330) at /usr/src/sys/kern/kern_shutdown.c:974
#4  0xffffffff80bdb0c3 in panic (fmt=<unavailable>)
    at /usr/src/sys/kern/kern_shutdown.c:887
#5  0xffffffff810f1f4f in trap_fatal (frame=<optimized out>,
    eva=<optimized out>) at /usr/src/sys/amd64/amd64/trap.c:969
#6  0xffffffff810f1f4f in trap_pfault (frame=0xfffffe00d5c863b0,
    usermode=false, signo=<optimized out>, ucode=<optimized out>)
#7  <signal handler called>
#8  __mtx_lock_sleep (c=c@entry=0xfffff80053f5f9f8, v=<optimized out>)
    at /usr/src/sys/kern/kern_mutex.c:614
#9  0xffffffff80ef965d in svc_vc_recv (xprt=0xfffff80067c6e000,
    msg=0xfffffe00d5c865f0, addrp=0xfffff80035f82080, mp=0xfffffe00d5c866a8)
    at /usr/src/sys/rpc/svc_vc.c:835
#10 0xffffffff80ef6252 in svc_getreq (xprt=0xfffff80067c6e000,
    rqstp_ret=<optimized out>) at /usr/src/sys/rpc/svc.c:935
#11 svc_run_internal (grp=grp@entry=0xfffff800084dc100,
    ismaster=ismaster@entry=1) at /usr/src/sys/rpc/svc.c:1279
#12 0xffffffff80ef5ca7 in svc_run (pool=0xfffff800084dc000)
    at /usr/src/sys/rpc/svc.c:1408
#13 0xffffffff80adc986 in nfsrvd_nfsd (td=td@entry=0xfffff8001a326780,
    args=args@entry=0xfffffe00d5c869a0)
    at /usr/src/sys/fs/nfsserver/nfs_nfsdkrpc.c:641
#14 0xffffffff80af9808 in nfssvc_nfsd (td=0xfffff8001a326780,
    uap=<optimized out>) at /usr/src/sys/fs/nfsserver/nfs_nfsdport.c:4102
#15 0xffffffff80e47d18 in sys_nfssvc (td=<optimized out>, uap=<optimized out>)
    at /usr/src/sys/nfs/nfs_nfssvc.c:107
#16 0xffffffff810f2886 in syscallenter (td=0xfffff8001a326780)
    at /usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:193
#17 amd64_syscall (td=0xfffff8001a326780, traced=0)
    at /usr/src/sys/amd64/amd64/trap.c:1208

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