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Subject: [Bug 205228] [lor] @ kern/kern_descrip.c kern/vfs_subr.c
Date: Thu, 10 Dec 2015 19:09:46 +0000
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X-Bugzilla-Product: Base System
X-Bugzilla-Component: kern
X-Bugzilla-Version: 11.0-CURRENT
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X-Bugzilla-Severity: Affects Only Me
X-Bugzilla-Who: zach@ploskey.com
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205228

            Bug ID: 205228
           Summary: [lor] @ kern/kern_descrip.c kern/vfs_subr.c
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: zach@ploskey.com

I see a LOR at every boot at base r292046. It was also present on base r291769.
These are GENERIC kernels w/ the system installed on geli-encrypted ZFS.

lock order reversal:
 1st 0xfffff8000b896490 filedesc structure (filedesc structure) @
/usr/src/sys/kern/kern_descrip.c:1231
 2nd 0xfffff800b11c0b78 zfs (zfs) @ /usr/src/sys/kern/vfs_subr.c:4756
stack backtrace:
#0 0xffffffff80a80110 at witness_debugger+0x70
#1 0xffffffff80a80011 at witness_checkorder+0xe71
#2 0xffffffff80a019db at __lockmgr_args+0xd3b
#3 0xffffffff80ac805c at vop_stdlock+0x3c
#4 0xffffffff80fba300 at VOP_LOCK1_APV+0x100
#5 0xffffffff80ae8e1a at _vn_lock+0x9a
#6 0xffffffff809e2e4e at knlist_remove_kq+0x7e
#7 0xffffffff80adf9c8 at filt_vfsdetach+0x28
#8 0xffffffff809e3727 at knote_fdclose+0xc7
#9 0xffffffff809d79d5 at closefp+0x65
#10 0xffffffff80e6f11e at amd64_syscall+0x2de
#11 0xffffffff80e4e93b at Xfast_syscall+0xfb

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