Description
In the Linux kernel, the following vulnerability has been resolved: net: wwan: iosm: fix NULL pointer dereference when removing device In suspend and resume cycle, the removal and rescan of device ends up in NULL pointer dereference. During driver initialization, if the ipc_imem_wwan_channel_init() fails to get the valid device capabilities it returns an error and further no resource (wwan struct) will be allocated. Now in this situation if driver removal procedure is initiated it would result in NULL pointer exception since unallocated wwan struct is dereferenced inside ipc_wwan_deinit(). ipc_imem_run_state_worker() to handle the called functions return value and to release the resource in failure case. It also reports the link down event in failure cases. The user space application can handle this event to do a device reset for restoring the device communication.
Product status
3670970dd8c661c10c10c300d726f59428eaad32 before ee44bacf462db3ec6e4f0dcfa7931e768670d77c
3670970dd8c661c10c10c300d726f59428eaad32 before 862c6e3e26735247d8a4df41fa2421909c3f4d63
3670970dd8c661c10c10c300d726f59428eaad32 before 60829145f1e2650b31ebe6a0ec70a9725b38fa2c
5.14
Any version before 5.14
6.1.30
6.3.4
6.4
References
git.kernel.org/...c/ee44bacf462db3ec6e4f0dcfa7931e768670d77c
git.kernel.org/...c/862c6e3e26735247d8a4df41fa2421909c3f4d63
git.kernel.org/...c/60829145f1e2650b31ebe6a0ec70a9725b38fa2c
