new LORs on 10-STABLE

[Oliver Pinter]

Hi All!

I get these new LORs with a recent 10-STABLE (~10-stable from today) branch:

LOR1:

[12] lock order reversal:
[12]  1st 0xfffff8000d1ea7c8 ufs (ufs) @ /usr/src/sys/kern/vfs_mount.c:1224
[12]  2nd 0xfffff8000d1eb240 devfs (devfs) @ /usr/src/sys/kern/vfs_subr.c:2192
[12] KDB: stack backtrace:
[12] db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
0xfffffe0465ef9170
[12] kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe0465ef9220
[12] witness_checkorder() at witness_checkorder+0xe12/frame 0xfffffe0465ef92b0
[12] __lockmgr_args() at __lockmgr_args+0x9ea/frame 0xfffffe0465ef93f0
[12] vop_stdlock() at vop_stdlock+0x3c/frame 0xfffffe0465ef9410
[12] VOP_LOCK1_APV() at VOP_LOCK1_APV+0xd9/frame 0xfffffe0465ef9440
[12] _vn_lock() at _vn_lock+0xaa/frame 0xfffffe0465ef94b0
[12] vget() at vget+0x67/frame 0xfffffe0465ef94f0
[12] devfs_allocv() at devfs_allocv+0xfd/frame 0xfffffe0465ef9540
[12] devfs_root() at devfs_root+0x43/frame 0xfffffe0465ef9570
[12] vflush() at vflush+0x78/frame 0xfffffe0465ef96c0
[12] devfs_unmount() at devfs_unmount+0x38/frame 0xfffffe0465ef96f0
[12] dounmount() at dounmount+0x524/frame 0xfffffe0465ef9770
[12] sys_unmount() at sys_unmount+0x3c6/frame 0xfffffe0465ef98a0
[12] amd64_syscall() at amd64_syscall+0x2a8/frame 0xfffffe0465ef99b0
[12] Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe0465ef99b0
[12] --- syscall (22, FreeBSD ELF64, sys_unmount), rip =
0x102e573755a, rsp = 0x62a395ff4318, rbp = 0x62a395ff4470 ---

LOR2:
[13] lock order reversal:
[13]  1st 0xfffff8000d3feb78 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2192
[13]  2nd 0xfffffe03df2460d8 bufwait (bufwait) @
/usr/src/sys/ufs/ffs/ffs_vnops.c:262
[13]  3rd 0xfffff8000d33a5f0 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2192
[13] KDB: stack backtrace:
[13] db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
0xfffffe0465ed0b30
[13] kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe0465ed0be0
[13] witness_checkorder() at witness_checkorder+0xe12/frame 0xfffffe0465ed0c70
[13] __lockmgr_args() at __lockmgr_args+0x9ea/frame 0xfffffe0465ed0db0
[13] ffs_lock() at ffs_lock+0x84/frame 0xfffffe0465ed0e00
[13] VOP_LOCK1_APV() at VOP_LOCK1_APV+0xd9/frame 0xfffffe0465ed0e30
[13] _vn_lock() at _vn_lock+0xaa/frame 0xfffffe0465ed0ea0
[13] vget() at vget+0x67/frame 0xfffffe0465ed0ee0
[13] vfs_hash_get() at vfs_hash_get+0xe1/frame 0xfffffe0465ed0f30
[13] ffs_vgetf() at ffs_vgetf+0x40/frame 0xfffffe0465ed0fc0
[13] softdep_sync_buf() at softdep_sync_buf+0xac0/frame 0xfffffe0465ed10a0
[13] ffs_syncvnode() at ffs_syncvnode+0x286/frame 0xfffffe0465ed1120
[13] ffs_truncate() at ffs_truncate+0x6ad/frame 0xfffffe0465ed1300
[13] ufs_direnter() at ufs_direnter+0x81a/frame 0xfffffe0465ed13c0
[13] ufs_makeinode() at ufs_makeinode+0x576/frame 0xfffffe0465ed1570
[13] ufs_create() at ufs_create+0x2d/frame 0xfffffe0465ed1590
[13] VOP_CREATE_APV() at VOP_CREATE_APV+0xcb/frame 0xfffffe0465ed15c0
[13] vn_open_cred() at vn_open_cred+0x2c3/frame 0xfffffe0465ed1720
[13] kern_openat() at kern_openat+0x26d/frame 0xfffffe0465ed18a0
[13] amd64_syscall() at amd64_syscall+0x2a8/frame 0xfffffe0465ed19b0
[13] Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe0465ed19b0
[13] --- syscall (499, FreeBSD ELF64, sys_openat), rip =
0x29173acbbaa, rsp = 0x6a7c0c683d08, rbp = 0x6a7c0c683de0 ---