Description

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: pcie: fix possible NULL pointer dereference It is possible that iwl_pci_probe() will fail and free the trans, then afterwards iwl_pci_remove() will be called and crash by trying to access trans which is already freed, fix it. iwlwifi 0000:01:00.0: Detected crf-id 0xa5a5a5a2, cnv-id 0xa5a5a5a2 wfpm id 0xa5a5a5a2 iwlwifi 0000:01:00.0: Can't find a correct rfid for crf id 0x5a2 ... BUG: kernel NULL pointer dereference, address: 0000000000000028 ... RIP: 0010:iwl_pci_remove+0x12/0x30 [iwlwifi] pci_device_remove+0x3e/0xb0 device_release_driver_internal+0x103/0x1f0 driver_detach+0x4c/0x90 bus_remove_driver+0x5c/0xd0 driver_unregister+0x31/0x50 pci_unregister_driver+0x40/0x90 iwl_pci_unregister_driver+0x15/0x20 [iwlwifi] __exit_compat+0x9/0x98 [iwlwifi] __x64_sys_delete_module+0x147/0x260

References 6

• git.kernel.org https://git.kernel.org/stable/c/0f9a1bcb94016d3a3c455a77b01f6bb06e15f6eb
• git.kernel.org https://git.kernel.org/stable/c/0fc0d287c1e7dcb39a3b9bb0f8679cd68c2156c7
• git.kernel.org https://git.kernel.org/stable/c/7545f21eee1356ec98581125c4dba9c4c0cc7397
• git.kernel.org https://git.kernel.org/stable/c/b655b9a9f8467684cfa8906713d33b71ea8c8f54
• git.kernel.org https://git.kernel.org/stable/c/dcd23aa6cc0ded7950b60ce1badb80b84045c6c0
• git.kernel.org https://git.kernel.org/stable/c/f6f2d16c77f936041b8ac495fceabded4ec6c83c

Remediation