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Kaixin Wang d03abc1c2b HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition ... commit e3f88665a78045fe35c7669d2926b8d97b892c11 upstream. In the ssi_protocol_probe() function, &ssi->work is bound with ssip_xmit_work(), In ssip_pn_setup(), the ssip_pn_xmit() function within the ssip_pn_ops structure is capable of starting the work. If we remove the module which will call ssi_protocol_remove() to make a cleanup, it will free ssi through kfree(ssi), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | ssip_xmit_work ssi_protocol_remove | kfree(ssi); | | struct hsi_client *cl = ssi->cl; | // use ssi Fix it by ensuring that the work is canceled before proceeding with the cleanup in ssi_protocol_remove(). Signed-off-by: Kaixin Wang <kxwang23@m.fudan.edu.cn> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20240918120749.1730-1-kxwang23@m.fudan.edu.cn Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-05-02 07:39:18 +02:00
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clients	HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition	2025-05-02 07:39:18 +02:00
controllers
hsi_boardinfo.c
hsi_core.c
hsi_core.h
Kconfig
Makefile