CVE-2024-53181

In the Linux kernel, the following vulnerability has been resolved:

um: vector: Do not use drvdata in release

The drvdata is not available in release. Lets just use container_of() to get the vector_device instance. Otherwise, removing a vector device will result in a crash:

RIP: 0033:vector_device_release+0xf/0x50 RSP: 00000000e187bc40 EFLAGS: 00010202 RAX: 0000000060028f61 RBX: 00000000600f1baf RCX: 00000000620074e0 RDX: 000000006220b9c0 RSI: 0000000060551c80 RDI: 0000000000000000 RBP: 00000000e187bc50 R08: 00000000603ad594 R09: 00000000e187bb70 R10: 000000000000135a R11: 00000000603ad422 R12: 00000000623ae028 R13: 000000006287a200 R14: 0000000062006d30 R15: 00000000623700b6 Kernel panic - not syncing: Segfault with no mm CPU: 0 UID: 0 PID: 16 Comm: kworker/0:1 Not tainted 6.12.0-rc6-g59b723cd2adb #1 Workqueue: events mc_work_proc Stack: 60028f61 623ae028 e187bc80 60276fcd 6220b9c0 603f5820 623ae028 00000000 e187bcb0 603a2bcd 623ae000 62370010 Call Trace: [<60028f61>] ? vector_device_release+0x0/0x50 [<60276fcd>] device_release+0x70/0xba [<603a2bcd>] kobject_put+0xba/0xe7 [<60277265>] put_device+0x19/0x1c [<60281266>] platform_device_put+0x26/0x29 [<60281e5f>] platform_device_unregister+0x2c/0x2e [<60029422>] vector_remove+0x52/0x58 [<60031316>] ? mconsole_reply+0x0/0x50 [<600310c8>] mconsole_remove+0x160/0x1cc [<603b19f4>] ? strlen+0x0/0x15 [<60066611>] ? __dequeue_entity+0x1a9/0x206 [<600666a7>] ? set_next_entity+0x39/0x63 [<6006666e>] ? set_next_entity+0x0/0x63 [<60038fa6>] ? um_set_signals+0x0/0x43 [<6003070c>] mc_work_proc+0x77/0x91 [<60057664>] process_scheduled_works+0x1b3/0x2dd [<60055f32>] ? assign_work+0x0/0x58 [<60057f0a>] worker_thread+0x1e9/0x293 [<6005406f>] ? set_pf_worker+0x0/0x64 [<6005d65d>] ? arch_local_irq_save+0x0/0x2d [<6005d748>] ? kthread_exit+0x0/0x3a [<60057d21>] ? worker_thread+0x0/0x293 [<6005dbf1>] kthread+0x126/0x12b [<600219c5>] new_thread_handler+0x85/0xb6

Affected Software

References

• https://git.kernel.org/stable/c/12f52e373d63f008ee386f371bdd82a3a3779199
• https://git.kernel.org/stable/c/35f8f72b45791a6a71b81140c59d02a6183b6f3b
• https://git.kernel.org/stable/c/376c7f0beb8f6f3800fc3013ef2f422d0cbfbf92
• https://git.kernel.org/stable/c/51b39d741970742a5c41136241a9c48ac607cf82
• https://git.kernel.org/stable/c/8204dd589c4f25a7618eece5da3f0871e02af8ae
• https://git.kernel.org/stable/c/8ed7793f6f589b4e1f0b38f8448578d2a48f9c82
• https://git.kernel.org/stable/c/bef9a2835011668c221851a7572b6c8433087f85
• https://git.kernel.org/stable/c/dc5251b1af5c9a0749322bf58bd5aa673f545fe2
• https://git.kernel.org/stable/c/e9d36f7e71a907ec507f84ee5d60a622c345cac4