Date: Tue, 13 Mar 2018 16:55:19 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 226578] panic: _mtx_lock_sleep: recursed on non-recursive mutex CAM device lock @ /usr/home/trasz/svn-ssh/head/sys/cam/scsi/scsi_da.c:2042 Message-ID: <bug-226578-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=226578 Bug ID: 226578 Summary: panic: _mtx_lock_sleep: recursed on non-recursive mutex CAM device lock @ /usr/home/trasz/svn-ssh/head/sys/cam/scsi/scsi_da.c:20 42 Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: trasz@FreeBSD.org The current -CURRENT panics like this: Unread portion of the kernel message buffer: WARNING: 127.0.0.1 (iqn.2012-06.com.example:target0): connection error; reconnecting panic: _mtx_lock_sleep: recursed on non-recursive mutex CAM device lock @ /usr/home/trasz/svn-ssh/head/sys/cam/scsi/scsi_da.c:2042 cpuid = 3 time = 1520959743 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00265b85e0 vpanic() at vpanic+0x18d/frame 0xfffffe00265b8640 vpanic() at vpanic/frame 0xfffffe00265b86c0 __mtx_lock_sleep() at __mtx_lock_sleep+0x420/frame 0xfffffe00265b8750 __mtx_lock_flags() at __mtx_lock_flags+0xf9/frame 0xfffffe00265b87a0 daasync() at daasync+0x117/frame 0xfffffe00265b87f0 xpt_async_process_dev() at xpt_async_process_dev+0x162/frame 0xfffffe00265b8840 xptdevicetraverse() at xptdevicetraverse+0xa4/frame 0xfffffe00265b8890 xpttargettraverse() at xpttargettraverse+0x6b/frame 0xfffffe00265b88d0 xpt_async_process() at xpt_async_process+0x114/frame 0xfffffe00265b89e0 xpt_done_process() at xpt_done_process+0x390/frame 0xfffffe00265b8a20 xpt_done_td() at xpt_done_td+0xf6/frame 0xfffffe00265b8a70 fork_exit() at fork_exit+0x84/frame 0xfffffe00265b8ab0 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00265b8ab0 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- KDB: enter: panic __curthread () at ./machine/pcpu.h:230 230 __asm("movq %%gs:%1,%0" : "=r" (td) (kgdb) #0 __curthread () at ./machine/pcpu.h:230 #1 doadump (textdump=0) at /usr/home/trasz/svn-ssh/head/sys/kern/kern_shutdown.c:347 #2 0xffffffff8040acfb in db_dump (dummy=<optimized out>, dummy2=<unavailable>, dummy3=<unavailable>, dummy4=<unavailable>) at /usr/home/trasz/svn-ssh/head/sys/ddb/db_command.c:574 #3 0xffffffff8040aac9 in db_command (last_cmdp=<optimized out>, cmd_table=<optimized out>, dopager=<optimized out>) at /usr/home/trasz/svn-ssh/head/sys/ddb/db_command.c:481 #4 0xffffffff8040a844 in db_command_loop () at /usr/home/trasz/svn-ssh/head/sys/ddb/db_command.c:534 #5 0xffffffff8040da6f in db_trap (type=<optimized out>, code=<optimized out>) at /usr/home/trasz/svn-ssh/head/sys/ddb/db_main.c:250 #6 0xffffffff80b192d3 in kdb_trap (type=3, code=-61456, tf=<optimized out>) at /usr/home/trasz/svn-ssh/head/sys/kern/subr_kdb.c:697 #7 0xffffffff80f8b868 in trap (frame=0xfffffe00265b8510) at /usr/home/trasz/svn-ssh/head/sys/amd64/amd64/trap.c:547 #8 <signal handler called> #9 kdb_enter (why=0xffffffff811fcef3 "panic", msg=<optimized out>) at /usr/home/trasz/svn-ssh/head/sys/kern/subr_kdb.c:479 #10 0xffffffff80ad409a in vpanic (fmt=<optimized out>, ap=0xfffffe00265b8680) at /usr/home/trasz/svn-ssh/head/sys/kern/kern_shutdown.c:801 #11 0xffffffff80ad3ef0 in kassert_panic ( fmt=0xffffffff81146b66 "_mtx_lock_sleep: recursed on non-recursive mutex %s @ %s:%d\n") at /usr/home/trasz/svn-ssh/head/sys/kern/kern_shutdown.c:698 #12 0xffffffff80ab3400 in __mtx_lock_sleep (c=0xfffff800054134e8, v=18446735277674057728, opts=<optimized out>, file=<optimized out>, line=32) at /usr/home/trasz/svn-ssh/head/sys/kern/kern_mutex.c:509 #13 0xffffffff80ab2f49 in __mtx_lock_flags (c=0xfffff800054134e8, opts=<optimized out>, file=<optimized out>, line=<optimized out>) at /usr/home/trasz/svn-ssh/head/sys/kern/kern_mutex.c:255 #14 0xffffffff80366cf7 in daasync (callback_arg=0xfffff80005c76200, code=16384, path=<optimized out>, arg=0xfffff800037f2800) at /usr/home/trasz/svn-ssh/head/sys/cam/scsi/scsi_da.c:2042 #15 0xffffffff80342462 in xpt_async_bcast (async_head=<optimized out>, async_code=<optimized out>, path=<optimized out>, async_arg=0xfffff800037f2800) at /usr/home/trasz/svn-ssh/head/sys/cam/cam_xpt.c:4408 #16 xpt_async_process_dev (device=<optimized out>, arg=<optimized out>) at /usr/home/trasz/svn-ssh/head/sys/cam/cam_xpt.c:4315 #17 0xffffffff80341304 in xptdevicetraverse (target=0xfffff80005961300, start_device=<optimized out>, tr_func=0xfffff80005a89000, arg=<optimized out>) at /usr/home/trasz/svn-ssh/head/sys/cam/cam_xpt.c:2339 #18 0xffffffff8034108b in xpttargettraverse (bus=0xfffff80005a05300, start_target=<optimized out>, tr_func=0xffffffff803422a0 <xpt_async_process_tgt>, arg=0xfffff80005a89000) at /usr/home/trasz/svn-ssh/head/sys/cam/cam_xpt.c:2300 #19 0xffffffff8033dd44 in xpt_async_process (periph=<optimized out>, ccb=0xfffff80005a89000) at /usr/home/trasz/svn-ssh/head/sys/cam/cam_xpt.c:4364 #20 0xffffffff8033e700 in xpt_done_process (ccb_h=0xfffff80005a89000) at /usr/home/trasz/svn-ssh/head/sys/cam/cam_xpt.c:5495 #21 0xffffffff80340786 in xpt_done_td (arg=0xffffffff81995000 <cam_doneqs>) at /usr/home/trasz/svn-ssh/head/sys/cam/cam_xpt.c:5522 #22 0xffffffff80a943d4 in fork_exit ( callout=0xffffffff80340690 <xpt_done_td>, arg=0xffffffff81995000 <cam_doneqs>, frame=0xfffffe00265b8ac0) at /usr/home/trasz/svn-ssh/head/sys/kern/kern_fork.c:1039 #23 <signal handler called> (kgdb) The way to reproduce it is to set up an iSCSI session, disconnect it in a loop ("while :; do ctladm isterminate -a; sleep 1; done"), while having "while :; do diskinfo -t /dev/da0; done" running in another session. -- You are receiving this mail because: You are the assignee for the bug.help
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