[Bug 194110] New: [lor] if_lagg rmlock <-> re0
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Fri Oct 3 08:23:55 UTC 2014
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194110
Bug ID: 194110
Summary: [lor] if_lagg rmlock <-> re0
Product: Base System
Version: 11.0-CURRENT
Hardware: Any
OS: Any
Status: Needs Triage
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: freebsd-bugs at FreeBSD.org
Reporter: dumbbell at FreeBSD.org
The following LOR appeared between r272024 and r272450:
Oct 3 10:11:38 magellan kernel: lock order reversal:
Oct 3 10:11:38 magellan kernel: 1st 0xfffff80006c92008 if_lagg rmlock (if_lagg
rmlock) @
/mnt/home/dumbbell/Projects/freebsd/src/SVN/head/sys/modules/if_lagg/../../net/if_lagg.c:1448
Oct 3 10:11:38 magellan kernel: 2nd 0xfffffe0000edd218 re0 (network driver) @
/mnt/home/dumbbell/Projects/freebsd/src/SVN/head/sys/dev/re/if_re.c:3416
Oct 3 10:11:38 magellan kernel: KDB: stack backtrace:
Oct 3 10:11:38 magellan kernel: db_trace_self_wrapper() at
db_trace_self_wrapper+0x2b/frame 0xfffffe012185e110
Oct 3 10:11:38 magellan kernel: kdb_backtrace() at kdb_backtrace+0x39/frame
0xfffffe012185e1c0
Oct 3 10:11:38 magellan kernel: witness_checkorder() at
witness_checkorder+0xdc2/frame 0xfffffe012185e250
Oct 3 10:11:38 magellan kernel: __mtx_lock_flags() at
__mtx_lock_flags+0xa8/frame 0xfffffe012185e2a0
Oct 3 10:11:38 magellan kernel: re_ioctl() at re_ioctl+0x114/frame
0xfffffe012185e2e0
Oct 3 10:11:38 magellan kernel: lagg_port_ioctl() at
lagg_port_ioctl+0xde/frame 0xfffffe012185e350
Oct 3 10:11:38 magellan kernel: if_addmulti() at if_addmulti+0x253/frame
0xfffffe012185e3d0
Oct 3 10:11:38 magellan kernel: lagg_ether_cmdmulti() at
lagg_ether_cmdmulti+0x108/frame 0xfffffe012185e410
Oct 3 10:11:38 magellan kernel: lagg_ioctl() at lagg_ioctl+0x7eb/frame
0xfffffe012185e4f0
Oct 3 10:11:38 magellan kernel: if_addmulti() at if_addmulti+0x253/frame
0xfffffe012185e570
Oct 3 10:11:38 magellan kernel: in6_mc_join_locked() at
in6_mc_join_locked+0x1a2/frame 0xfffffe012185e600
Oct 3 10:11:38 magellan kernel: in6_joingroup() at in6_joingroup+0x75/frame
0xfffffe012185e640
Oct 3 10:11:38 magellan kernel: in6_update_ifa() at in6_update_ifa+0xc37/frame
0xfffffe012185e740
Oct 3 10:11:38 magellan kernel: in6_ifattach() at in6_ifattach+0x455/frame
0xfffffe012185e970
Oct 3 10:11:38 magellan kernel: ifioctl() at ifioctl+0xad4/frame
0xfffffe012185ea30
Oct 3 10:11:38 magellan kernel: kern_ioctl() at kern_ioctl+0x22b/frame
0xfffffe012185ea90
Oct 3 10:11:38 magellan kernel: sys_ioctl() at sys_ioctl+0x13c/frame
0xfffffe012185eae0
Oct 3 10:11:38 magellan kernel: amd64_syscall() at amd64_syscall+0x25a/frame
0xfffffe012185ebf0
Oct 3 10:11:38 magellan kernel: Xfast_syscall() at Xfast_syscall+0xfb/frame
0xfffffe012185ebf0
Oct 3 10:11:38 magellan kernel: --- syscall (54, FreeBSD ELF64, sys_ioctl),
rip = 0x8011df81a, rsp = 0x7fffffffe458, rbp = 0x7fffffffe4b0 ---
The lagg0 interface is configured like this in /etc/rc.conf:
ifconfig_lagg0="laggproto failover laggport re0 laggport wlan0 SYNCDHCP"
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