CVE-2024-40906: In the Linux kernel, the following vulnerability has been resolved:  net/mlx5: Always stop health timer during driver removal  Currently, if teardown_hca fails to execute during driver removal, mlx5 does not stop the health timer. Afterwards, mlx5 continue with driver teardown. This may lead to a UAF bug, which results in page fault Oops[1], since the health timer invokes after resources were freed.  Hence, stop the health monitor even if teardown_hca fails.  [1] mlx5_core 0000:18:00.0: E-Switch: Unload vfs: mode(LEGACY), nvfs(0), necvfs(0), active vports(0) mlx5_core 0000:18:00.0: E-Switch: Disable: mode(LEGACY), nvfs(0), necvfs(0), active vports(0) mlx5_core 0000:18:00.0: E-Switch: Disable: mode(LEGACY), nvfs(0), necvfs(0), active vports(0) mlx5_core 0000:18:00.0: E-Switch: cleanup mlx5_core 0000:18:00.0: wait_func:1155:(pid 1967079): TEARDOWN_HCA(0x103) timeout. Will cause a leak of a command resource mlx5_core 0000:18:00.0: mlx5_function_close:1288:(pid 1967079): tear_down_hca failed, skip cleanup BUG: unable to handle page fault for address: ffffa26487064230 PGD 100c00067 P4D 100c00067 PUD 100e5a067 PMD 105ed7067 PTE 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 0 PID: 0 Comm: swapper/0 Tainted: G           OE     -------  ---  6.7.0-68.fc38.x86_64 #1 Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0013.121520200651 12/15/2020 RIP: 0010:ioread32be+0x34/0x60 RSP: 0018:ffffa26480003e58 EFLAGS: 00010292 RAX: ffffa26487064200 RBX: ffff9042d08161a0 RCX: ffff904c108222c0 RDX: 000000010bbf1b80 RSI: ffffffffc055ddb0 RDI: ffffa26487064230 RBP: ffff9042d08161a0 R08: 0000000000000022 R09: ffff904c108222e8 R10: 0000000000000004 R11: 0000000000000441 R12: ffffffffc055ddb0 R13: ffffa26487064200 R14: ffffa26480003f00 R15: ffff904c108222c0 FS:  0000000000000000(0000) GS:ffff904c10800000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffa26487064230 CR3: 00000002c4420006 CR4: 00000000007706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace:  <IRQ>  ? __die+0x23/0x70  ? page_fault_oops+0x171/0x4e0  ? exc_page_fault+0x175/0x180  ? asm_exc_page_fault+0x26/0x30  ? __pfx_poll_health+0x10/0x10 [mlx5_core]  ? __pfx_poll_health+0x10/0x10 [mlx5_core]  ? ioread32be+0x34/0x60  mlx5_health_check_fatal_sensors+0x20/0x100 [mlx5_core]  ? __pfx_poll_health+0x10/0x10 [mlx5_core]  poll_health+0x42/0x230 [mlx5_core]  ? __next_timer_interrupt+0xbc/0x110  ? __pfx_poll_health+0x10/0x10 [mlx5_core]  call_timer_fn+0x21/0x130  ? __pfx_poll_health+0x10/0x10 [mlx5_core]  __run_timers+0x222/0x2c0  run_timer_softirq+0x1d/0x40  __do_softirq+0xc9/0x2c8  __irq_exit_rcu+0xa6/0xc0  sysvec_apic_timer_interrupt+0x72/0x90  </IRQ>  <TASK>  asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:cpuidle_enter_state+0xcc/0x440  ? cpuidle_enter_state+0xbd/0x440  cpuidle_enter+0x2d/0x40  do_idle+0x20d/0x270  cpu_startup_entry+0x2a/0x30  rest_init+0xd0/0xd0  arch_call_rest_init+0xe/0x30  start_kernel+0x709/0xa90  x86_64_start_reservations+0x18/0x30  x86_64_start_kernel+0x96/0xa0  secondary_startup_64_no_verify+0x18f/0x19b ---[ end trace 0000000000000000 ]---