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c5c73dca59
linux/net/tipc
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Erik Hugne c5c73dca59 tipc: fix missing spinlock init in broadcast code 
After commit 3c294cb3 "tipc: remove the bearer congestion mechanism",
we try to grab the broadcast bearer lock when sending multicast
messages over the broadcast link. This will cause an oops because
the lock is never initialized. This is an old bug, but the lock
was never actually used before commit 3c294cb3, so that why it was
not visible until now.  The oops will look something like:

	BUG: spinlock bad magic on CPU#2, daemon/147
	lock: bcast_bearer+0x48/0xffffffffffffd19a [tipc],
	.magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
	Pid: 147, comm: daemon Not tainted 3.8.0-rc3+ #206
	Call Trace:
	spin_dump+0x8a/0x8f
	spin_bug+0x21/0x26
	do_raw_spin_lock+0x114/0x150
	_raw_spin_lock_bh+0x19/0x20
	tipc_bearer_blocked+0x1f/0x40 [tipc]
	tipc_link_send_buf+0x82/0x280 [tipc]
	? __alloc_skb+0x9f/0x2b0
	tipc_bclink_send_msg+0x77/0xa0 [tipc]
	tipc_multicast+0x11b/0x1b0 [tipc]
	send_msg+0x225/0x530 [tipc]
	sock_sendmsg+0xca/0xe0

The above can be triggered by running the multicast demo program.

Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-02-15 15:40:56 -05:00
..
addr.c tipc: compress out gratuitous extra carriage returns 2012-04-30 15:53:56 -04:00
addr.h tipc: compress out gratuitous extra carriage returns 2012-04-30 15:53:56 -04:00
bcast.c tipc: fix missing spinlock init in broadcast code 2013-02-15 15:40:56 -05:00
bcast.h tipc: compress out gratuitous extra carriage returns 2012-04-30 15:53:56 -04:00
bearer.c tipc: remove the bearer congestion mechanism 2012-11-21 20:07:25 -05:00
bearer.h tipc: remove the bearer congestion mechanism 2012-11-21 20:07:25 -05:00
config.c tipc: eliminate configuration for maximum number of name publications 2012-08-20 02:26:31 -07:00
config.h tipc: Optimize re-initialization of configuration service 2012-04-26 17:19:07 -04:00
core.c tipc: delete TIPC_ADVANCED Kconfig variable 2012-11-22 14:33:29 -05:00
core.h tipc: eliminate configuration for maximum number of name publications 2012-08-20 02:26:31 -07:00
discover.c tipc: remove the bearer congestion mechanism 2012-11-21 20:07:25 -05:00
discover.h
eth_media.c tipc: fix lockdep warning during bearer initialization 2012-08-20 02:26:30 -07:00
handler.c tipc: do not use tasklet_disable before tasklet_kill 2012-11-03 15:10:14 -04:00
Kconfig tipc: delete TIPC_ADVANCED Kconfig variable 2012-11-22 14:33:29 -05:00
link.c tipc: remove obsolete flush of stale reassembly buffer 2012-12-06 17:20:19 -05:00
link.h tipc: remove the bearer congestion mechanism 2012-11-21 20:07:25 -05:00
log.c tipc: remove print_buf and deprecated log buffer code 2012-07-13 19:34:43 -04:00
Makefile tipc: compress out gratuitous extra carriage returns 2012-04-30 15:53:56 -04:00
msg.c tipc: remove TIPC packet debugging functions and macros 2012-07-13 19:25:16 -04:00
msg.h tipc: compress out gratuitous extra carriage returns 2012-04-30 15:53:56 -04:00
name_distr.c tipc: eliminate an unnecessary cast of node variable 2012-11-22 14:33:28 -05:00
name_distr.h
name_table.c net/tipc/name_table.c: Remove unecessary semicolon 2012-09-18 16:08:19 -04:00
name_table.h tipc: compress out gratuitous extra carriage returns 2012-04-30 15:53:56 -04:00
net.c tipc: change tipc_net_start routine return value type 2012-08-20 02:26:30 -07:00
net.h tipc: change tipc_net_start routine return value type 2012-08-20 02:26:30 -07:00
netlink.c netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
node_subscr.c tipc: use standard printk shortcut macros (pr_err etc.) 2012-07-13 19:24:44 -04:00
node_subscr.h tipc: compress out gratuitous extra carriage returns 2012-04-30 15:53:56 -04:00
node.c tipc: introduce message to synchronize broadcast link 2012-11-22 14:33:21 -05:00
node.h tipc: rename supported flag to recv_permitted 2012-11-22 07:50:51 -05:00
port.c tipc: standardize across connect/disconnect function naming 2012-12-07 17:23:19 -05:00
port.h tipc: standardize across connect/disconnect function naming 2012-12-07 17:23:19 -05:00
ref.c tipc: use standard printk shortcut macros (pr_err etc.) 2012-07-13 19:24:44 -04:00
ref.h
socket.c tipc: refactor accept() code for improved readability 2012-12-07 17:23:24 -05:00
subscr.c tipc: standardize across connect/disconnect function naming 2012-12-07 17:23:19 -05:00
subscr.h tipc: compress out gratuitous extra carriage returns 2012-04-30 15:53:56 -04:00