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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