[Bug 207535] LOR in UFS on FreeBSD 10.3-BETA3 @ sys_fsync

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207535

Mark Linimon  changed:

   What|Removed |Added

   Assignee|freebsd-bugs@FreeBSD.org|freebsd...@freebsd.org

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[Bug 207535] LOR in UFS on FreeBSD 10.3-BETA3 @ sys_fsync

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207535

Bug ID: 207535
   Summary: LOR in UFS on FreeBSD 10.3-BETA3 @ sys_fsync
   Product: Base System
   Version: 10.3-BETA2
  Hardware: Any
OS: Any
Status: New
  Severity: Affects Only Me
  Priority: ---
 Component: kern
  Assignee: freebsd-bugs@FreeBSD.org
  Reporter: o...@hardenedbsd.org

[25] lock order reversal:
[25]  1st 0xfe03dea4e1c0 bufwait (bufwait) @
/usr/src/sys/kern/vfs_bio.c:3130
[25]  2nd 0xf8000d61c7b0 snaplk (snaplk) @
/usr/src/sys/ufs/ffs/ffs_snapshot.c:2298
[25] KDB: stack backtrace:
[25] db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
0xfe04656f8310
[25] kdb_backtrace() at kdb_backtrace+0x39/frame 0xfe04656f83c0
[25] witness_checkorder() at witness_checkorder+0xe12/frame 0xfe04656f8450
[25] __lockmgr_args() at __lockmgr_args+0x9ea/frame 0xfe04656f8590
[25] ffs_copyonwrite() at ffs_copyonwrite+0x179/frame 0xfe04656f8640
[25] ffs_geom_strategy() at ffs_geom_strategy+0xe6/frame 0xfe04656f8670
[25] bufwrite() at bufwrite+0x19a/frame 0xfe04656f86c0
[25] ffs_update() at ffs_update+0x2b8/frame 0xfe04656f8740
[25] ffs_syncvnode() at ffs_syncvnode+0x485/frame 0xfe04656f87c0
[25] ffs_fsync() at ffs_fsync+0x20/frame 0xfe04656f87f0
[25] VOP_FSYNC_APV() at VOP_FSYNC_APV+0xd1/frame 0xfe04656f8820
[25] sys_fsync() at sys_fsync+0x175/frame 0xfe04656f88a0
[25] amd64_syscall() at amd64_syscall+0x2a8/frame 0xfe04656f89b0
[25] Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfe04656f89b0
[25] --- syscall (95, FreeBSD ELF64, sys_fsync), rip = 0x243328448ca, rsp =
0x67f303cb9a58, rbp = 0x67f303cbab00 ---

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