[Bug 244975] Panic: deadlres_td_sleep_q: possible deadlock detected

Sun Mar 22 12:24:52 UTC 2020

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244975

            Bug ID: 244975
           Summary: Panic: deadlres_td_sleep_q: possible deadlock detected
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: gbergling at gmail.com

I recently got this kernel panic while reporting the system. A kernel dump is
available on request.

FreeBSD fbsd-dev.0xfce3.net 13.0-CURRENT FreeBSD 13.0-CURRENT #0
979585e9a6e-c267389(master): Fri Mar 13 21:31:16 CET 2020    
root at lion.0xfce3.net:/boiler/nfs/obj/boiler/nfs/src/amd64.amd64/sys/GENERIC 
amd64

panic: deadlres_td_sleep_q: possible deadlock detected for 0xfffffe0001efda00,
blocked for 180105 ticks

Unread portion of the kernel message buffer:
<3>pid 10000 (find), jid 0, uid 0, was killed: out of swap space
<3>pid 14819 (ntpd), jid 0, uid 123, was killed: out of swap space
<3>pid 47356 (hv_kvp_daemon), jid 0, uid 0, was killed: out of swap space
<3>pid 61093 (devd), jid 0, uid 0, was killed: out of swap space
<3>pid 5427 (rpc.statd), jid 0, uid 0, was killed: out of swap space
<3>pid 99994 (auditd), jid 0, uid 0, was killed: out of swap space
<3>pid 6158 (rpc.lockd), jid 0, uid 0, was killed: out of swap space
<3>pid 78549 (rpcbind), jid 0, uid 0, was killed: out of swap space
<3>pid 498 (sh), jid 0, uid 0, was killed: out of swap space
<3>pid 727 (sh), jid 0, uid 0, was killed: out of swap space
<3>pid 10600 (wc), jid 0, uid 0, was killed: out of swap space
<3>pid 77620 (sh), jid 0, uid 0, was killed: out of swap space
<3>pid 8561 (sh), jid 0, uid 0, was killed: out of swap space
<3>pid 9550 (sh), jid 0, uid 0, was killed: out of swap space
<3>pid 1444 (sh), jid 0, uid 0, was killed: out of swap space
<3>pid 3054 (sh), jid 0, uid 0, was killed: out of swap space
<3>pid 78120 (sh), jid 0, uid 0, was killed: out of swap space
<3>pid 79779 (sh), jid 0, uid 0, was killed: out of swap space
<3>pid 48007 (hv_vss_daemon), jid 0, uid 0, was killed: out of swap space
<3>pid 3487 (mail), jid 0, uid 0, was killed: out of swap space
<3>pid 80132 (mail), jid 0, uid 0, was killed: out of swap space
<3>pid 36313 (getty), jid 0, uid 0, was killed: out of swap space
<3>pid 36249 (getty), jid 0, uid 0, was killed: out of swap space
<3>pid 10298 (tee), jid 0, uid 0, was killed: out of swap space
<3>pid 77183 (cron), jid 0, uid 0, was killed: out of swap space
<3>pid 1246 (lockf), jid 0, uid 0, was killed: out of swap space
<3>pid 77777 (lockf), jid 0, uid 0, was killed: out of swap space
panic: deadlres_td_sleep_q: possible deadlock detected for 0xfffffe0001efda00,
blocked for 180105 ticks

cpuid = 0
time = 1584153669
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0001c969c0
vpanic() at vpanic+0x182/frame 0xfffffe0001c96a10
panic() at panic+0x43/frame 0xfffffe0001c96a70
deadlkres() at deadlkres+0x360/frame 0xfffffe0001c96ab0
fork_exit() at fork_exit+0x80/frame 0xfffffe0001c96af0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0001c96af0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic

No symbol "zombproc" in current context.
Reading symbols from /boot/kernel/zfs.ko...Reading symbols from
/usr/lib/debug//boot/kernel/zfs.ko.debug...done.
done.
Loaded symbols for /boot/kernel/zfs.ko
Reading symbols from /boot/kernel/opensolaris.ko...Reading symbols from
/usr/lib/debug//boot/kernel/opensolaris.ko.debug...done.
done.
Loaded symbols for /boot/kernel/opensolaris.ko
Reading symbols from /boot/kernel/mac_ntpd.ko...Reading symbols from
/usr/lib/debug//boot/kernel/mac_ntpd.ko.debug...done.
done.
Loaded symbols for /boot/kernel/mac_ntpd.ko
#0  doadump (textdump=0) at src/sys/amd64/include/pcpu_aux.h:55
55              __asm("movq %%gs:%P1,%0" : "=r" (td) : "n" (offsetof(struct
pcpu,
(kgdb) #0  doadump (textdump=0) at src/sys/amd64/include/pcpu_aux.h:55
#1  0xffffffff8049a3ea in db_dump (dummy=<value optimized out>,
    dummy2=<value optimized out>, dummy3=<value optimized out>,
    dummy4=<value optimized out>) at /boiler/nfs/src/sys/ddb/db_command.c:575
#2  0xffffffff8049a1ac in db_command (cmd_table=<value optimized out>,
    dopager=1) at /boiler/nfs/src/sys/ddb/db_command.c:482
#3  0xffffffff80499f1d in db_command_loop ()
    at /boiler/nfs/src/sys/ddb/db_command.c:535
#4  0xffffffff8049d118 in db_trap (type=<value optimized out>,
    code=<value optimized out>) at /boiler/nfs/src/sys/ddb/db_main.c:253
#5  0xffffffff80c07c74 in kdb_trap (type=3, code=0, tf=<value optimized out>)
    at /boiler/nfs/src/sys/kern/subr_kdb.c:699
#6  0xffffffff8105cc08 in trap (frame=0xfffffe0001c968f0)
    at /boiler/nfs/src/sys/amd64/amd64/trap.c:579
#7  0xffffffff81032ac8 in calltrap ()
    at /boiler/nfs/src/sys/amd64/amd64/exception.S:289
#8  0xffffffff80c07407 in kdb_enter (why=0xffffffff811ec1dd "panic",
    msg=<value optimized out>) at src/sys/amd64/include/cpufunc.h:65
#9  0xffffffff80bbccee in vpanic (fmt=<value optimized out>,
    ap=<value optimized out>) at /boiler/nfs/src/sys/kern/kern_shutdown.c:902
#10 0xffffffff80bbca83 in panic (fmt=<value optimized out>)
    at /boiler/nfs/src/sys/kern/kern_shutdown.c:839
#11 0xffffffff80b53ef0 in deadlkres ()
    at /boiler/nfs/src/sys/kern/kern_clock.c:242
#12 0xffffffff80b7a760 in fork_exit (callout=0xffffffff80b53b90 <deadlkres>,
    arg=0x0, frame=0xfffffe0001c96b00)
    at /boiler/nfs/src/sys/kern/kern_fork.c:1061
#13 0xffffffff81033b0e in fork_trampoline ()
    at /boiler/nfs/src/sys/amd64/amd64/exception.S:1080
#14 0x0000000000000000 in ?? ()
Current language:  auto; currently minimal
(kgdb)

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