LOR

[Vlad GALU]

6.1-RC as of today:

-- cut here --
lock order reversal:
 1st 0xc7e9e500 kqueue (kqueue) @ kern/kern_event.c:1053
 2nd 0xc1043144 system map (system map) @ vm/vm_map.c:2317
KDB: stack backtrace:
witness_checkorder(c1043144,9,c070ef8e,90d,c06ed2cf) at witness_checkorder+0x3bb
_mtx_lock_flags(c1043144,0,c070ef8e,90d,c8549000) at _mtx_lock_flags+0x37
_vm_map_lock(c10430c0,c070ef8e,90d,c8254a00,2000) at _vm_map_lock+0x37
vm_map_remove(c10430c0,c8549000,c854b000,c8549000,e8ef5b14) at
vm_map_remove+0x30
uma_large_free(c8254a00,c7e33300,c7e33378,600,c7e9e500) at uma_large_free+0x66
free(c8549000,c072eca0,1400,41d,c86ab000) at free+0xf1
kqueue_expand(500,0,c06fb70e,314,c7e840d8) at kqueue_expand+0x19f
kqueue_register(c7e9e500,e8ef5be4,c7e33300,1,c858d858) at kqueue_register+0x648
kern_kevent(c7e33300,8,1,0,e8ef5cb8,e8ef5cb0,0,0,e8ef5d04,c0549c8f,c0549cd2,bfbfe7b0)
at kern_kevent+0xd8
kevent(c7e33300,e8ef5d04,18,c06e7bee,6) at kevent+0x4f
syscall(806003b,3b,bfbf003b,8082000,500) at syscall+0x13b
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (363, FreeBSD ELF32, kevent), eip = 0x481371a3, esp =
0xbfbfe7ac, ebp = 0xbfbfe818 ---
-- and here --


--
If it's there, and you can see it, it's real.
If it's not there, and you can see it, it's virtual.
If it's there, and you can't see it, it's transparent.
If it's not there, and you can't see it, you erased it.