LOR in mac_portacl on dhclient start

Simon L. Nielsen simon at FreeBSD.org
Sun Jul 25 14:02:58 PDT 2004


I get the following LOR on each boot when dhclient starts up:

lock order reversal
 1st 0xc1d702dc so_rcv (so_rcv) @ /usr/src/sys/kern/uipc_syscalls.c:193
 2nd 0xc08c1b00 rule_sx (rule_sx) @ /usr/src/sys/security/mac_portacl/mac_portacl.c:399
KDB: stack backtrace:
kdb_backtrace(c074eb16,c08c1b00,c08c0427,c08c0427,c08c0443) at kdb_backtrace+0x2f
witness_checkorder(c08c1b00,1,c08c0443,18f,c078f2bc) at witness_checkorder+0x67c
_sx_slock(c08c1b00,c08c0443,18f,1,c1b22e20) at _sx_slock+0x7f
rules_check(c197b900,2,2,44,c08c19e0) at rules_check+0x47
check_socket_bind(c197b900,c1d70278,c1ce7d48,c1b22e20,0) at check_socket_bind+0x81
mac_check_socket_bind(c197b900,c1d70278,c1b22e20,c1,c1d70278) at mac_check_socket_bind+0xd5
kern_bind(c1d566e0,4,c1b22e20,c1b22e20,0) at kern_bind+0xa4
bind(c1d566e0,e659fd14,c,431,3) at bind+0x44
syscall(2f,2f,2f,bfbfe5c4,80a9000) at syscall+0x271
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (104, FreeBSD ELF32, bind), eip = 0x281163af, esp = 0xbfbfe4dc, ebp = 0xbfbfe528 ---

I load mac_portacl from loader.conf with the following policy (which
is set from sysctl.conf):


BTW. this is not on the LOR page.

Simon L. Nielsen
FreeBSD Documentation Team
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