Date: Thu, 31 Oct 2013 19:17:18 GMT From: "Matthew X. Economou" <xenophon+freebsd@irtnog.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/183535: "panic: mutex CAM device lock not owned" booting FreeBSD-current (r257451) under Hyper-V Message-ID: <201310311917.r9VJHISY070909@oldred.freebsd.org> Resent-Message-ID: <201310311920.r9VJK1GW058722@freefall.freebsd.org>
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>Number: 183535
>Category: kern
>Synopsis: "panic: mutex CAM device lock not owned" booting FreeBSD-current (r257451) under Hyper-V
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Oct 31 19:20:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Matthew X. Economou
>Release: 11.0-CURRENT
>Organization:
IRTNOG
>Environment:
FreeBSD 11.0-CURRENT #1 r257451: Thu Oct 31 11:41:36 EDT 2013
root@cinip201bsddev.irtnog.net:/usr/obj/usr/src/sys/GENERIC amd64
>Description:
FreeBSD panics at boot time when it begins attaching the Hyper-V synthetic storage driver:
storvsc0 on vmbus0
panic: mutex CAM device lock not owned at /usr/src/sys/cam/cam_periph.c:1042
cpuid = 0
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00f7f7b6b0
kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe00f7f7b760
vpanic() at vpanic+0x126/frame 0xfffffe00f7f7b7a0
panic() at panic+0x43/frame 0xfffffe00f7f7b800
__mtx_assert() at __mtx_assert+0xc2/frame 0xfffffe00f7f7b810
cam_periph_runccb() at cam_periph_runccb+0x49/frame 0xfffffe00f7f7b940
storvsc_attach() at storvsc_attach+0x6d0/frame 0xfffffe00f7f7b9e0
device_attach() at device_attach+0x3a2/frame 0xfffffe00f7f7ba40
hv_vmbus_child_device_register() at hv_vmbus_child_device_register+0xba/frame 0xfffffe00f7f7bae0
vmbus_channel_process_offer() at vmbus_channel_process_offer+0xec/frame 0xfffffe00f7f7bb10
work_item_callback() at work_item_callback+0x2e/frame 0xfffffe00f7f7bb30
taskqueue_run_locked() at taskqueue_run_locked+0xf0/frame 0xfffffe00f7f7bb80
taskqueue_thread_loop() at taskqueue_thread_loop+0x9b/frame 0xfffffe00f7f7bbb0
fork_exit() at fork_exit+0x84/frame 0xfffffe00f7f7bbf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00f7f7bbf0
--- trap 0, rip = 0, rsp = 0xfffffe00f7f7bcb0, rbp = 0 ---
KDB: enter: panic
[ thread pid 0 tid 100038 ]
Stopped at kdb_enter+0x3e: movq $0,kdb_why
Switching to the ATA driver (hw.ata.disk_enable) results in the same panic:
storvsc0 on vmbus0
panic: mutex CAM device lock not owned at /usr/src/sys/cam/cam_periph.c:1042
cpuid = 0
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00f7fe06b0
kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe00f7fe0760
vpanic() at vpanic+0x126/frame 0xfffffe00f7fe07a0
panic() at panic+0x43/frame 0xfffffe00f7fe0800
__mtx_assert() at __mtx_assert+0xc2/frame 0xfffffe00f7fe0810
cam_periph_runccb() at cam_periph_runccb+0x49/frame 0xfffffe00f7fe0940
storvsc_attach() at storvsc_attach+0x6d0/frame 0xfffffe00f7fe09e0
device_attach() at device_attach+0x3a2/frame 0xfffffe00f7fe0a40
hv_vmbus_child_device_register() at hv_vmbus_child_device_register+0xba/frame 0xfffffe00f7fe0ae0
vmbus_channel_process_offer() at vmbus_channel_process_offer+0xec/frame 0xfffffe00f7fe0b10
work_item_callback() at work_item_callback+0x2e/frame 0xfffffe00f7fe0b30
taskqueue_run_locked() at taskqueue_run_locked+0xf0/frame 0xfffffe00f7fe0b80
taskqueue_thread_loop() at taskqueue_thread_loop+0x9b/frame 0xfffffe00f7fe0bb0
fork_exit() at fork_exit+0x84/frame 0xfffffe00f7fe0bf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00f7fe0bf0
--- trap 0, rip = 0, rsp = 0xfffffe00f7fe0cb0, rbp = 0 ---
KDB: enter: panic
[ thread pid 0 tid 100050 ]
Stopped at kdb_enter+0x3e: movq $0,kdb_why
>How-To-Repeat:
See above.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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