Bug 182842 - [lor] lock order reversal
Summary: [lor] lock order reversal
Status: Open
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: Unspecified
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-bugs (Nobody)
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-10-08 23:50 UTC by berend
Modified: 2017-12-31 22:27 UTC (History)
0 users

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Description berend 2013-10-08 23:50:01 UTC 
Oct  9 11:35:00 bmach kernel: lock order reversal:
Oct  9 11:35:00 bmach kernel: 1st 0xfffffe00f2c25f90 bufwait (bufwait) @ /usr/src/head/sys/kern/vfs_bio.c:3049
Oct  9 11:35:00 bmach kernel: 2nd 0xfffff80120adb530 snaplk (snaplk) @ /usr/src/head/sys/ufs/ffs/ffs_snapshot.c:2297
Oct  9 11:35:00 bmach kernel: KDB: stack backtrace:
Oct  9 11:35:00 bmach kernel: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe011e5e85d0
Oct  9 11:35:00 bmach kernel: kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe011e5e8680
Oct  9 11:35:00 bmach kernel: witness_checkorder() at witness_checkorder+0xd23/frame 0xfffffe011e5e8710
Oct  9 11:35:00 bmach kernel: __lockmgr_args() at __lockmgr_args+0x86c/frame 0xfffffe011e5e8840
Oct  9 11:35:00 bmach kernel: ffs_copyonwrite() at ffs_copyonwrite+0x17a/frame 0xfffffe011e5e88f0
Oct  9 11:35:00 bmach kernel: ffs_geom_strategy() at ffs_geom_strategy+0xdd/frame 0xfffffe011e5e8920
Oct  9 11:35:00 bmach kernel: bufwrite() at bufwrite+0x170/frame 0xfffffe011e5e8970
Oct  9 11:35:00 bmach kernel: ffs_sbupdate() at ffs_sbupdate+0x1c8/frame 0xfffffe011e5e89e0
Oct  9 11:35:00 bmach kernel: ffs_sync() at ffs_sync+0x526/frame 0xfffffe011e5e8ab0
Oct  9 11:35:00 bmach kernel: sync_fsync() at sync_fsync+0x129/frame 0xfffffe011e5e8ae0
Oct  9 11:35:00 bmach kernel: VOP_FSYNC_APV() at VOP_FSYNC_APV+0xf0/frame 0xfffffe011e5e8b10
Oct  9 11:35:00 bmach kernel: sched_sync() at sched_sync+0x34c/frame 0xfffffe011e5e8bb0
Oct  9 11:35:00 bmach kernel: fork_exit() at fork_exit+0x84/frame 0xfffffe011e5e8bf0
Oct  9 11:35:00 bmach kernel: fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe011e5e8bf0
Oct  9 11:35:00 bmach kernel: --- trap 0, rip = 0, rsp = 0xfffffe011e5e8cb0, rbp = 0 ---

How-To-Repeat: Happens after reboot.
Comment 1 Eitan Adler freebsd_committer freebsd_triage 2017-12-31 07:58:29 UTC 
For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

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