Bluetooth: bnep: fix wild-memory-access in proto_unregister

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: fix wild-memory-access in proto_unregister There's issue as follows: KASAN: maybe wild-memory-access in range [0xdead...108-0xdead...10f] CPU: 3 UID: 0 PID: 2805 Comm: rmmod Tainted: G W RIP: 0010:proto_unregister+0xee/0x400 Call Trace: <TASK> __do_sys_delete_module+0x318/0x580 do_syscall_64+0xc1/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f As bnep_init() ignore bnep_sock_init()'s return value, and bnep_sock_init() will cleanup all resource. Then when remove bnep module will call bnep_sock_cleanup() to cleanup sock's resource. To solve above issue just return bnep_sock_init()'s return value in bnep_exit().

References

• https://git.kernel.org/stable/c/e232728242c4e98fb30e4c6bedb6ba8b482b6301
• https://git.kernel.org/stable/c/2c439470b23d78095a0d2f923342df58b155f669
• https://git.kernel.org/stable/c/6c151aeb6dc414db8f4daf51be072e802fae6667
• https://git.kernel.org/stable/c/fa58e23ea1359bd24b323916d191e2e9b4b19783
• https://git.kernel.org/stable/c/03015b6329e6de42f03ec917c25c4cf944f81f66
• https://git.kernel.org/stable/c/d10cd7bf574ead01fae140ce117a11bcdacbe6a8
• https://git.kernel.org/stable/c/20c424bc475b2b2a6e0e2225d2aae095c2ab2f41
• https://git.kernel.org/stable/c/64a90991ba8d4e32e3173ddd83d0b24167a5668c