Date: Wed, 20 May 2015 20:43:01 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 200353] lock order reversal (vfs_mount.c and vfs_subr.c) Message-ID: <bug-200353-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200353 Bug ID: 200353 Summary: lock order reversal (vfs_mount.c and 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: freebsd@tim.thechases.com Created attachment 156988 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=156988&action=edit dmesg output with backtrace On booting, I get this in my dmesg =================================================== lock order reversal: 1st 0xfffff8003135e5f0 zfs (zfs) @ /usr/src/sys/kern/vfs_mount.c:848 2nd 0xfffff800313d37c8 devfs (devfs) @ /usr/src/sys/kern/vfs_subr.c:2164 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00dcf75490 witness_checkorder() at witness_checkorder+0xe50/frame 0xfffffe00dcf75520 __lockmgr_args() at __lockmgr_args+0xacf/frame 0xfffffe00dcf75650 vop_stdlock() at vop_stdlock+0x3c/frame 0xfffffe00dcf75670 VOP_LOCK1_APV() at VOP_LOCK1_APV+0xfc/frame 0xfffffe00dcf756a0 _vn_lock() at _vn_lock+0x8a/frame 0xfffffe00dcf75710 vget() at vget+0x67/frame 0xfffffe00dcf75750 devfs_allocv() at devfs_allocv+0xfd/frame 0xfffffe00dcf757a0 devfs_root() at devfs_root+0x43/frame 0xfffffe00dcf757d0 vfs_donmount() at vfs_donmount+0x153e/frame 0xfffffe00dcf75aa0 sys_nmount() at sys_nmount+0x71/frame 0xfffffe00dcf75ae0 amd64_syscall() at amd64_syscall+0x25a/frame 0xfffffe00dcf75bf0 Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe00dcf75bf0 --- syscall (378, FreeBSD ELF64, sys_nmount), rip = 0x800aac5fa, rsp = 0x7fffffffdc28, rbp = 0x7fffffffe190 --- =================================================== It doesn't appear to impact my system since (AFAICT) it appears to be working fine, but if it's a bug, I wanted to make sure it got reported. I can provide extra info as needed, as it's just a tinkering machine. -- You are receiving this mail because: You are the assignee for the bug.
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