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Date:      Thu, 28 Mar 2019 15:35:57 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 236846] FreeBSD 12.0-STABLE-p3 r345567: panic: vm_fault_hold: fault on nofault entry
Message-ID:  <bug-236846-227-XUzWAT9DAA@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-236846-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-236846-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D236846

--- Comment #1 from Viktor Dukhovni <ietf-dane@dukhovni.org> ---
I switched to the 12.0-STABLE kernel, but still essentially the same panic:

panic: vm_fault_hold: fault on nofault entry, addr: 0xfffffe0075df2000
cpuid =3D 6
time =3D 1553772208
KDB: stack backtrace:
#0 0xffffffff80bf1907 at kdb_backtrace+0x67
#1 0xffffffff80ba58c3 at vpanic+0x1a3
#2 0xffffffff80ba5713 at panic+0x43
#3 0xffffffff80ee9ed1 at vm_fault_hold+0x2801
#4 0xffffffff80ee7680 at vm_fault+0x60
#5 0xffffffff81082a92 at trap_pfault+0x162
#6 0xffffffff81081f6e at trap+0x29e
#7 0xffffffff8105c715 at calltrap+0x8
#8 0xffffffff80d32d73 at ip_input+0x463
#9 0xffffffff80cc70f6 at netisr_dispatch_src+0xd6
#10 0xffffffff80cab643 at ether_demux+0x163
#11 0xffffffff80cac7a6 at ether_nh_input+0x346
#12 0xffffffff80cc70f6 at netisr_dispatch_src+0xd6
#13 0xffffffff80caba44 at ether_input+0x54
#14 0xffffffff80cc3836 at iflib_rxeof+0xa66
#15 0xffffffff80cbdd06 at _task_fn_rx+0x76
#16 0xffffffff80bf0194 at gtaskqueue_run_locked+0x144
#17 0xffffffff80befdf8 at gtaskqueue_thread_loop+0x98
Uptime: 5h20m55s


addr2line -afi -e /usr/lib/debug/boot/kernel/kernel.debug 0xffffffff80d32d73
0xffffffff80d32d73
ip_input
/usr/src/sys/netinet/ip_input.c:606

The kgdb backtrace is:

#0  __curthread () at ./machine/pcpu.h:230
#1  doadump (textdump=3D<optimized out>) at /usr/src/sys/kern/kern_shutdown=
.c:371
#2  0xffffffff80ba54ab in kern_reboot (howto=3D260) at
/usr/src/sys/kern/kern_shutdown.c:451
#3  0xffffffff80ba5923 in vpanic (fmt=3D<optimized out>, ap=3D0xfffffe00004=
5c130)
at /usr/src/sys/kern/kern_shutdown.c:877
#4  0xffffffff80ba5713 in panic (fmt=3D<unavailable>) at
/usr/src/sys/kern/kern_shutdown.c:804
#5  0xffffffff80ee9ed1 in vm_fault_hold (map=3D<optimized out>,
vaddr=3D18446741876663853056, fault_type=3D<optimized out>,=20
    fault_flags=3D<optimized out>, m_hold=3D0x0) at /usr/src/sys/vm/vm_faul=
t.c:598
#6  0xffffffff80ee7680 in vm_fault (map=3D0xfffff80003002000, vaddr=3D<opti=
mized
out>, fault_type=3D4 '\004', fault_flags=3D0)
    at /usr/src/sys/vm/vm_fault.c:548
#7  0xffffffff81082a92 in trap_pfault (frame=3D0xfffffe000045c460, usermode=
=3D0) at
/usr/src/sys/amd64/amd64/trap.c:844
#8  0xffffffff81081f6e in trap (frame=3D0xfffffe000045c460) at
/usr/src/sys/amd64/amd64/trap.c:441
#9  <signal handler called>
#10 0xfffffe0075df2450 in ?? ()
#11 0xffffffff8201a908 in __pcpu ()
#12 0xffffffff8201a908 in __pcpu ()
#13 0xfffffe0000640208 in ?? ()
#14 0xfffff8000377b000 in ?? ()
#15 0xfffff80100000000 in ?? ()
#16 0x0000000000000034 in ?? ()
#17 0xfffff8000377b000 in ?? ()
#18 0xfffffe000045c630 in ?? ()
#19 0xfffffe00006489f8 in ?? ()
#20 0x0000000000000008 in ?? ()
#21 0xfffff804d4d6c100 in ?? ()
#22 0x0000000065270264 in ?? ()
#23 0xfffff8000377b000 in ?? ()
#24 0x0000000000000014 in ?? ()
#25 0xffffffff82014880 in ?? ()
#26 0xfffff804d4d6c166 in ?? ()
#27 0xfffffe000045c660 in ?? ()
#28 0xffffffff80d32d73 in ip_input (m=3D0xfffff804d4d6c100) at
/usr/src/sys/netinet/ip_input.c:606
Backtrace stopped: frame did not save the PC

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