Johannes Berg f2ac54ebf8 net: rfkill: reduce data->mtx scope in rfkill_fop_open ... In syzbot runs, lockdep reports that there's a (potential) deadlock here of data->mtx being locked recursively. This isn't really a deadlock since they are different instances, but lockdep cannot know, and teaching it would be far more difficult than other fixes. At the same time we don't even really _need_ the mutex to be locked in rfkill_fop_open(), since we're modifying only a completely fresh instance of 'data' (struct rfkill_data) that's not yet added to the global list. However, to avoid any reordering etc. within the globally locked section, and to make the code look more symmetric, we should still lock the data->events list manipulation, but also need to lock _only_ that. So do that. Reported-by: syzbot+509238e523e032442b80@syzkaller.appspotmail.com Fixes: 2c3dfba4cf ("rfkill: sync before userspace visibility/changes") Signed-off-by: Johannes Berg <johannes.berg@intel.com>		2023-10-11 16:55:10 +02:00
..
core.c	net: rfkill: reduce data->mtx scope in rfkill_fop_open	2023-10-11 16:55:10 +02:00
input.c
Kconfig
Makefile
rfkill-gpio.c	net: rfkill: gpio: prevent value glitch during probe	2023-10-11 16:36:52 +02:00
rfkill.h