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linux/net/rfkill
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Greg Kroah-Hartman b1e0c8d3ab net: rfkill: prevent unlimited numbers of rfkill events from being created 
[ Upstream commit ea245d78de ]

Userspace can create an unlimited number of rfkill events if the system
is so configured, while not consuming them from the rfkill file
descriptor, causing a potential out of memory situation.  Prevent this
from bounding the number of pending rfkill events at a "large" number
(i.e. 1000) to prevent abuses like this.

Cc: Johannes Berg <johannes@sipsolutions.net>
Reported-by: Yuan Tan <yuantan098@gmail.com>
Reported-by: Yifan Wu <yifanwucs@gmail.com>
Reported-by: Juefei Pu <tomapufckgml@gmail.com>
Reported-by: Xin Liu <bird@lzu.edu.cn>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patch.msgid.link/2026033013-disfigure-scroll-e25e@gregkh
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
[ replaced `scoped_guard()` with explicit `mutex_lock()`/`mutex_unlock()` calls ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-04-18 10:33:38 +02:00
..
core.c net: rfkill: prevent unlimited numbers of rfkill events from being created 2026-04-18 10:33:38 +02:00
input.c rfkill: use DEFINE_SPINLOCK() for spinlock 2021-04-08 10:16:53 +02:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
rfkill-gpio.c net: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer 2025-10-02 13:39:09 +02:00
rfkill.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00