Date: Wed, 6 Jan 2010 14:04:07 +0800 From: "Wilkinson, Alex" <alex.wilkinson@dsto.defence.gov.au> To: freebsd-current@freebsd.org Subject: LOR vfs_mount.c && msdosfs_vfsops.c [SEC=UNCLASSIFIED] Message-ID: <20100106060407.GA30135@stlux503.dsto.defence.gov.au>
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Upon exec'ing: '#sudo umount /mnt/' (/mnt is FAT32 USB stick). Cant see anything that looks the same @ http://sources.zabbadoz.net/freebsd/lor.html lock order reversal: 1st 0xc9541af8 ufs (ufs) @ /usr/src/sys/kern/vfs_mount.c:1204 2nd 0xc7d80d18 devfs (devfs) @ /usr/src/sys/fs/msdosfs/msdosfs_vfsops.c:944 KDB: stack backtrace: db_trace_self_wrapper(c0c9b289,eb3f5a34,c08d26e5,c08c339b,c0c9e192,...) at db_trace_self_wrapper+0x26 kdb_backtrace(c08c339b,c0c9e192,c61317d8,c6131708,eb3f5a90,...) at kdb_backtrace+0x29 _witness_debugger(c0c9e192,c7d80d18,c0c8ca59,c6131708,c0c8d23d,...) at _witness_debugger+0x25 witness_checkorder(c7d80d18,9,c0c8d23d,3b0,c7d80d38,...) at witness_checkorder+0x839 __lockmgr_args(c7d80d18,80400,c7d80d38,0,0,...) at __lockmgr_args+0x824 vop_stdlock(eb3f5bac,c0f301a0,c75f10a4,80400,c7d80cc0,...) at vop_stdlock+0x62 VOP_LOCK1_APV(c0d7e580,eb3f5bac,eb3f5bcc,c0dbe5e0,c7d80cc0,...) at VOP_LOCK1_APV+0xb5 _vn_lock(c7d80cc0,80400,c0c8d23d,3b0,c6798798,...) at _vn_lock+0x5e msdosfs_sync(c6798798,1,c0ca4bbf,4f9,80,...) at msdosfs_sync+0x29c dounmount(c6798798,8000000,c75f1000,47e,4,...) at dounmount+0x44e unmount(c75f1000,eb3f5cf8,8,c75f1000,c0d822c8,...) at unmount+0x2ff syscall(eb3f5d38) at syscall+0x2a3 Xint0x80_syscall() at Xint0x80_syscall+0x20 --- syscall (22, FreeBSD ELF32, unmount), eip = 0x280dafaf, esp = 0xbfbfe49c, ebp = 0xbfbfe568 --- -Alex IMPORTANT: This email remains the property of the Australian Defence Organisation and is subject to the jurisdiction of section 70 of the CRIMES ACT 1914. If you have received this email in error, you are requested to contact the sender and delete the email.
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