]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
HID: intel-ish-hid: Fix use-after-free issue in ishtp_hid_remove()
authorZhang Lixu <lixu.zhang@intel.com>
Tue, 18 Feb 2025 06:37:30 +0000 (14:37 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 13 Mar 2025 11:51:04 +0000 (12:51 +0100)
commit01b18a330cda61cc21423a7d1af92cf31ded8f60
treee39a3d004985d33142240f00e0e593399d878e6d
parent4283afde4f8dcfb9cc6bd08d1746f5c24838e485
HID: intel-ish-hid: Fix use-after-free issue in ishtp_hid_remove()

[ Upstream commit 07583a0010696a17fb0942e0b499a62785c5fc9f ]

The system can experience a random crash a few minutes after the driver is
removed. This issue occurs due to improper handling of memory freeing in
the ishtp_hid_remove() function.

The function currently frees the `driver_data` directly within the loop
that destroys the HID devices, which can lead to accessing freed memory.
Specifically, `hid_destroy_device()` uses `driver_data` when it calls
`hid_ishtp_set_feature()` to power off the sensor, so freeing
`driver_data` beforehand can result in accessing invalid memory.

This patch resolves the issue by storing the `driver_data` in a temporary
variable before calling `hid_destroy_device()`, and then freeing the
`driver_data` after the device is destroyed.

Fixes: 0b28cb4bcb17 ("HID: intel-ish-hid: ISH HID client driver")
Signed-off-by: Zhang Lixu <lixu.zhang@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/hid/intel-ish-hid/ishtp-hid.c