Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.0 048/148] module: Call module notifier on failure after complete_formation() | Date | Wed, 3 Jun 2015 21:08:38 +0900 |
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4.0-stable review patch. If anyone has any objections, please let me know.
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From: Steven Rostedt <rostedt@goodmis.org>
commit 37815bf866ab6722a47550f8d25ad3f1a16a680c upstream.
The module notifier call chain for MODULE_STATE_COMING was moved up before the parsing of args, into the complete_formation() call. But if the module failed to load after that, the notifier call chain for MODULE_STATE_GOING was never called and that prevented the users of those call chains from cleaning up anything that was allocated.
Link: http://lkml.kernel.org/r/554C52B9.9060700@gmail.com
Reported-by: Pontus Fuchs <pontus.fuchs@gmail.com> Fixes: 4982223e51e8 "module: set nx before marking module MODULE_STATE_COMING" Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- kernel/module.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/kernel/module.c +++ b/kernel/module.c @@ -3366,6 +3366,9 @@ static int load_module(struct load_info module_bug_cleanup(mod); mutex_unlock(&module_mutex); + blocking_notifier_call_chain(&module_notify_list, + MODULE_STATE_GOING, mod); + /* we can't deallocate the module until we clear memory protection */ unset_module_init_ro_nx(mod); unset_module_core_ro_nx(mod);
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