Date: Mon, 24 Jan 2011 15:23:47 GMT From: Olivier Certner <olivier.freebsd@free.fr> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/154266: LOR between (ufs) vfs_mount.c and (devfs) ffs_vfsops.c Message-ID: <201101241523.p0OFNlJ4062129@red.freebsd.org> Resent-Message-ID: <201101241530.p0OFU9kN062236@freefall.freebsd.org>
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>Number: 154266 >Category: kern >Synopsis: LOR between (ufs) vfs_mount.c and (devfs) ffs_vfsops.c >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: Mon Jan 24 15:30:09 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Olivier Certner >Release: 9.0-CURRENT-201101 >Organization: Private >Environment: FreeBSD 9.0-CURRENT-201101 #0: Mon Jan 3 22:15:39 UTC 2011 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 >Description: This LOR appears when mounting a USB key (I think the slice had a UFS filesystem, but not completely sure). It doesn't seem to have been reported in any other PR. lock order reversal: 1st 0xfffffe0003e6b818 ufs (ufs) @ /usr/src/sys/kern/vfs_mount.c:1210 2nd 0xfffffe00166f3638 devfs (devfs) @ /usr/src/sys/ufs/ffs/ffs_vfsops.c:1266 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a kdb_backtrace() at kdb_backtrace+0x37 _witness_debugger() at _witness_debugger+0x2e witness_checkorder() at witness_checkorder+0x807 __lockmgr_args() at __lockmgr_args+0xd42 vop_stdlock() at vop_stdlock+0x39 VOP_LOCK1_APV() at VOP_LOCK1_APV+0x9b _vn_lock() at _vn_lock+0x47 ffs_flushfiles() at ffs_flushfiles+0xb5 ffs_unmount() at ffs_unmount+0x70 dounmount() at dounmount+0x2dc unmount() at unmount+0x28e syscallenter() at syscallenter+0x1aa syscall() at syscall+0x4c Xfast_syscall() at Xfast_syscall+0xe2 --- syscall (22, FreeBSD ELF64, unmount), rip = 0x800b6c67c, rsp = 0x7fffffffeaa8, rbp = 0x7fffffffebc0 --- >How-To-Repeat: Mount some USB key with a UFS filesystem on it. >Fix: None. >Release-Note: >Audit-Trail: >Unformatted:
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