CVE-2024-53183

In the Linux kernel, the following vulnerability has been resolved: um: net: Do not use drvdata in release The drvdata is not available in release. Let's just use container_of() to get the uml_net instance. Otherwise, removing a network device will result in a crash: RIP: 0033:net_device_release+0x10/0x6f RSP: 00000000e20c7c40 EFLAGS: 00010206 RAX: 000000006002e4e7 RBX: 00000000600f1baf RCX: 00000000624074e0 RDX: 0000000062778000 RSI: 0000000060551c80 RDI: 00000000627af028 RBP: 00000000e20c7c50 R08: 00000000603ad594 R09: 00000000e20c7b70 R10: 000000000000135a R11: 00000000603ad422 R12: 0000000000000000 R13: 0000000062c7af00 R14: 0000000062406d60 R15: 00000000627700b6 Kernel panic - not syncing: Segfault with no mm CPU: 0 UID: 0 PID: 29 Comm: kworker/0:2 Not tainted 6.12.0-rc6-g59b723cd2adb #1 Workqueue: events mc_work_proc Stack: 627af028 62c7af00 e20c7c80 60276fcd 62778000 603f5820 627af028 00000000 e20c7cb0 603a2bcd 627af000 62770010 Call Trace: [ ] device_release+0x70/0xba [ ] kobject_put+0xba/0xe7 [ ] put_device+0x19/0x1c [ ] platform_device_put+0x26/0x29 [ ] platform_device_unregister+0x2c/0x2e [ ] net_remove+0x63/0x69 [ ] ? mconsole_reply+0x0/0x50 [ ] mconsole_remove+0x160/0x1cc [ ] ? __remove_hrtimer+0x38/0x74 [ ] ? hrtimer_try_to_cancel+0x8c/0x98 [ ] ? dl_server_stop+0x3f/0x48 [ ] ? dl_server_stop+0x0/0x48 [ ] ? dequeue_entities+0x327/0x390 [ ] ? um_set_signals+0x0/0x43 [ ] mc_work_proc+0x77/0x91 [ ] process_scheduled_works+0x1b3/0x2dd [ ] ? assign_work+0x0/0x58 [ ] worker_thread+0x1e9/0x293 [ ] ? set_pf_worker+0x0/0x64 [ ] ? arch_local_irq_save+0x0/0x2d [ ] ? kthread_exit+0x0/0x3a [ ] ? worker_thread+0x0/0x293 [ ] kthread+0x126/0x12b [ ] new_thread_handler+0x85/0xb6