Hiroki Sato hrs at FreeBSD.org
Sat Sep 4 09:29:51 PDT 2004


 I got the following LOR just after starting /etc/rc.d/sendmail
 with -CURRENT as of Sep 4 on a SMP machine.  No panic occurred, but
 this appears every time the system is booted.

lock order reversal
 1st 0xc08ec200 ifnet (ifnet) @ /usr/src/sys/net/if.c:1489
 2nd 0xc46703c8 user map (user map) @ /usr/src/sys/vm/vm_map.c:2994
KDB: stack backtrace:
kdb_backtrace(0,ffffffff,c08c7810,c08c8300,c08569ec) at kdb_backtrace+0x29
witness_checkorder(c46703c8,9,c0810c9b,bb2) at witness_checkorder+0x544
_sx_xlock(c46703c8,c0810c9b,bb2) at _sx_xlock+0x50
_vm_map_lock_read(c4670384,c0810c9b,bb2,2000004,c4b715ac) at _vm_map_lock_read+0x37
vm_map_lookup(e852ca84,813b000,2,e852ca88,e852ca78) at vm_map_lookup+0x28
vm_fault(c4670384,813b000,2,8,c4adeb00) at vm_fault+0x66
trap_pfault(e852cb4c,0,813b000) at trap_pfault+0xd2
trap(e8520018,c0610010,c08e0010,813b000,e852cbc0) at trap+0x30d
calltrap() at calltrap+0x5
--- trap 0xc, eip = 0xc078d17a, esp = 0xe852cb8c, ebp = 0xe852cbec ---
generic_copyout(c0086924,e852cc60,e852cc14,c061fa3a,c08c8968) at generic_copyout+0x36
ifioctl(c4c7ca20,c0086924,e852cc60,c4adeb00,0) at ifioctl+0x25
soo_ioctl(c4b4a8c4,c0086924,e852cc60,c4d5cd00,c4adeb00) at soo_ioctl+0x2b1
ioctl(c4adeb00,e852cd14,3,2,282) at ioctl+0x3e0
syscall(2f,2f,2f,0,0) at syscall+0x213
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (54, FreeBSD ELF32, ioctl), eip = 0x2828c22f, esp = 0xbfbfcd7c, ebp = 0xbfbfcf28 ---

| Hiroki SATO
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