]> git.baikalelectronics.ru Git - kernel.git/commit
livepatch: add module locking around kallsyms calls
authorMiroslav Benes <mbenes@suse.cz>
Mon, 1 Jun 2015 15:48:37 +0000 (17:48 +0200)
committerJiri Kosina <jkosina@suse.cz>
Tue, 2 Jun 2015 20:54:38 +0000 (22:54 +0200)
commit1eb98f1eda3a74ff6da3c4fa86d17fed8a6fb3f1
treeebb05d25771b64db46b476686c70d7691e6cb692
parent3e53b448eee4bc8e2a78f85d2b6c1af49a2825d5
livepatch: add module locking around kallsyms calls

The list of loaded modules is walked through in
module_kallsyms_on_each_symbol (called by kallsyms_on_each_symbol). The
module_mutex lock should be acquired to prevent potential corruptions
in the list.

This was uncovered with new lockdep asserts in module code introduced by
the commit 0be964be0d45 ("module: Sanitize RCU usage and locking") in
recent next- trees.

Signed-off-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
kernel/livepatch/core.c