kmod: prevent kmod_loop_msg overflow in __request_module()
authorJiri Kosina <jkosina@suse.cz>
Wed, 26 Oct 2011 02:40:39 +0000 (12:40 +1030)
committerGreg Kroah-Hartman <gregkh@suse.de>
Fri, 11 Nov 2011 17:43:01 +0000 (09:43 -0800)
commit112e8e4019fdf3fc987cf0f839a2bfbd6c169e60
tree5c458dc6463d757d1bbdc1d18784fbfb31194cdb
parent9c348b765479ebc59251c84147bfe008b8ecafe6
kmod: prevent kmod_loop_msg overflow in __request_module()

commit 37252db6aa576c34fd794a5a54fb32d7a8b3a07a upstream.

Due to post-increment in condition of kmod_loop_msg in __request_module(),
the system log can be spammed by much more than 5 instances of the 'runaway
loop' message if the number of events triggering it makes the kmod_loop_msg
to overflow.

Fix that by making sure we never increment it past the threshold.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
kernel/kmod.c