[Bug 232544] general protection fault while in kernel mode - vdev_indirect

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232544

--- Comment #2 from Jeremy Faulkner <gldisater at gmail.com> ---
It's been months since this pool has had a vdev removed, it had 8MB used for
removed device remapping. I attempted to delete old snapshots from before the
last vdev had been removed and had this crash. While I was deleting old
snapshots the pool was also scrubbing and had a steady io load from jails
running on the pool.

The core dump is over 15GB. I'll try and upload it later. 


FreeBSD constans 12.0-STABLE FreeBSD 12.0-STABLE #6 r344436M: Thu Feb 21
13:40:08 EST 2019    
gldisater at constans:/usr/obj/usr/src/amd64.amd64/sys/GENERIC  amd64


(kgdb) bt
#0  __curthread () at ./machine/pcpu.h:230
#1  doadump (textdump=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:366
#2  0xffffffff80bc361a in kern_reboot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:446
#3  0xffffffff80bc3a90 in vpanic (fmt=<optimized out>, ap=0xfffffe00ec040350)
at /usr/src/sys/kern/kern_shutdown.c:872
#4  0xffffffff80bc3873 in panic (fmt=<unavailable>) at
/usr/src/sys/kern/kern_shutdown.c:799
#5  0xffffffff8109b539 in trap_fatal (frame=0xfffffe00ec040540, eva=0) at
/usr/src/sys/amd64/amd64/trap.c:929
#6  0xffffffff8109b599 in trap_pfault (frame=0xfffffe00ec040540, usermode=0) at
/usr/src/sys/amd64/amd64/trap.c:765
#7  0xffffffff8109abaf in trap (frame=0xfffffe00ec040540) at
/usr/src/sys/amd64/amd64/trap.c:441
#8  <signal handler called>
#9  vdev_indirect_mapping_duplicate_adjacent_entries (vd=0xfffff8012a7a0000,
offset=402853027840, asize=4096, copied_entries=<optimized out>)
    at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_indirect.c:974
#10 vdev_indirect_remap (vd=0xfffff8012a7a0000, offset=<optimized out>,
asize=<optimized out>, func=0xffffffff82cd5860 <vdev_indirect_gather_splits>,
arg=0xfffff80402c7d418)
    at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_indirect.c:1060
#11 0xffffffff82cd4a6c in vdev_indirect_io_start (zio=0xfffff80402c7d418) at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_indirect.c:1282
#12 0xffffffff82d05656 in zio_vdev_io_start (zio=0xfffff80402c7d418) at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:3341
#13 0xffffffff82d01aac in zio_execute (zio=0xfffff80402c7d418) at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1785
#14 0xffffffff82d013cb in zio_nowait (zio=0xfffff80402c7d418) at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1841
#15 0xffffffff82cdaeec in vdev_mirror_io_start (zio=<optimized out>) at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_mirror.c:560
#16 0xffffffff82d05509 in zio_vdev_io_start (zio=0xfffff80262174000) at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:3188
#17 0xffffffff82d01aac in zio_execute (zio=0xfffff80262174000) at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1785
#18 0xffffffff82d013cb in zio_nowait (zio=0xfffff80262174000) at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1841
#19 0xffffffff82c9de90 in scan_exec_io (dp=0xfffff8097b629000,
bp=0xfffffe00ec0409c8, zio_flags=8388784, zb=0xfffff80ebc23dbc8,
queue=0xfffff80ed63c8600)
    at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c:3682
#20 0xffffffff82c9ff96 in scan_io_queue_issue (queue=0xfffff80ed63c8600,
io_list=0x80) at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c:2587
#21 scan_io_queues_run_one (arg=0xfffff80ed63c8600) at
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c:2766
#22 0xffffffff82c30da0 in taskq_run (arg=0xfffff810357eeea0, pending=-512) at
/usr/src/sys/cddl/compat/opensolaris/kern/opensolaris_taskq.c:110
#23 0xffffffff80c21894 in taskqueue_run_locked (queue=0xfffff80b1fc9db00) at
/usr/src/sys/kern/subr_taskqueue.c:467
#24 0xffffffff80c22c18 in taskqueue_thread_loop (arg=<optimized out>) at
/usr/src/sys/kern/subr_taskqueue.c:773
#25 0xffffffff80b84c32 in fork_exit (callout=0xffffffff80c22b80
<taskqueue_thread_loop>, arg=0xfffff811c3072590, frame=0xfffffe00ec040c00) at
/usr/src/sys/kern/kern_fork.c:1059
#26 <signal handler called>
(kgdb)

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