nfc: fix memory leak of se_io context in nfc_genl_se_io

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: nfc: fix memory leak of se_io context in nfc_genl_se_io The callback context for sending/receiving APDUs to/from the selected secure element is allocated inside nfc_genl_se_io and supposed to be eventually freed in se_io_cb callback function. However, there are several error paths where the bwi_timer is not charged to call se_io_cb later, and the cb_context is leaked. The patch proposes to free the cb_context explicitly on those error paths. At the moment we can't simply check 'dev->ops->se_io()' return value as it may be negative in both cases: when the timer was charged and was not.

References

• https://git.kernel.org/stable/c/5321da6d84b87a34eea441677d649c34bd854169
• https://git.kernel.org/stable/c/af452e35b9e6a87cd49e54a7a3d60d934b194651
• https://git.kernel.org/stable/c/271eed1736426103335c5aac50f15b0f4d236bc0
• https://git.kernel.org/stable/c/8978315cb4bf8878c9c8ec05dafd8f7ff539860d
• https://git.kernel.org/stable/c/c494365432dcdc549986f4d9af9eb6190cbdb153
• https://git.kernel.org/stable/c/b2036a252381949d3b743a3de069324ae3028a57
• https://git.kernel.org/stable/c/ba98db08895748c12e5ded52cd1598dce2c79e55
• https://git.kernel.org/stable/c/25ff6f8a5a3b8dc48e8abda6f013e8cc4b14ffea