LOR: --- syscall (22, FreeBSD ELF64, sys_unmount), rip = 0x810246a5a, rsp = 0x7fffffff13f8, rbp = 0x7fffffff1560 ---

Oliver Pinter oliver.pntr at gmail.com
Tue Feb 18 19:34:32 UTC 2014


FreeBSD pandora-d 10.0-STABLE FreeBSD 10.0-STABLE #0
0c38d4b(stable/10): Tue Feb 18 19:13:35 CET 2014
root at pandora-d:/usr/obj/usr/src/sys/OP-DEBUG  amd64

lock order reversal:
 1st 0xfffff80019acc7c8 ufs (ufs) @ /usr/src/sys/kern/vfs_mount.c:1237
 2nd 0xfffff80019acd240 devfs (devfs) @ /usr/src/sys/kern/vfs_subr.c:2101
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0237810270
kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe0237810320
witness_checkorder() at witness_checkorder+0xd23/frame 0xfffffe02378103b0
__lockmgr_args() at __lockmgr_args+0x86c/frame 0xfffffe02378104e0
vop_stdlock() at vop_stdlock+0x3c/frame 0xfffffe0237810500
VOP_LOCK1_APV() at VOP_LOCK1_APV+0xd2/frame 0xfffffe0237810530
_vn_lock() at _vn_lock+0xab/frame 0xfffffe02378105a0
vget() at vget+0x70/frame 0xfffffe02378105f0
devfs_allocv() at devfs_allocv+0xfd/frame 0xfffffe0237810640
devfs_root() at devfs_root+0x43/frame 0xfffffe0237810670
vflush() at vflush+0x77/frame 0xfffffe02378107c0
devfs_unmount() at devfs_unmount+0x38/frame 0xfffffe02378107f0
dounmount() at dounmount+0x41f/frame 0xfffffe0237810870
sys_unmount() at sys_unmount+0x356/frame 0xfffffe02378109a0
amd64_syscall() at amd64_syscall+0x239/frame 0xfffffe0237810ab0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe0237810ab0
--- syscall (22, FreeBSD ELF64, sys_unmount), rip = 0x810246a5a, rsp =
0x7fffffff13f8, rbp = 0x7fffffff1560 ---


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