Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: wwan: t7xx: Fix FSM command timeout issue When driver processes the internal state change command, it use an asynchronous thread to process the command operation. If the main thread detects that the task has timed out, the asynchronous thread will panic when executing the completion notification because the main thread completion object has been released. BUG: unable to handle page fault for address: fffffffffffffff8 PGD 1f283a067 P4D 1f283a067 PUD 1f283c067 PMD 0 Oops: 0000 [#1] PREEMPT SMP NOPTI RIP: 0010:complete_all+0x3e/0xa0 [...] Call Trace: <TASK> ? __die_body+0x68/0xb0 ? page_fault_oops+0x379/0x3e0 ? exc_page_fault+0x69/0xa0 ? asm_exc_page_fault+0x22/0x30 ? complete_all+0x3e/0xa0 fsm_main_thread+0xa3/0x9c0 [mtk_t7xx (HASH:1400 5)] ? __pfx_autoremove_wake_function+0x10/0x10 kthread+0xd8/0x110 ? __pfx_fsm_main_thread+0x10/0x10 [mtk_t7xx (HASH:1400 5)] ? __pfx_kthread+0x10/0x10 ret_from_fork+0x38/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 </TASK> [...] CR2: fffffffffffffff8 ---[ end trace 0000000000000000 ]--- Use the reference counter to ensure safe release as Sergey suggests: https://lore.kernel.org/all/da90f64c-260a-4329-87bf-1f9ff20a5951@gmail.com/
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 13e920d93e37fcaef4a9309515798a3cae9dcf19 before b8ab9bd0c8855cd5a6f4e0265083576257ff3fc5; affected 13e920d93e37fcaef4a9309515798a3cae9dcf19 before 0cd3bde081cd3452c875fa1e5c55834c670d6e05; affected 13e920d93e37fcaef4a9309515798a3cae9dcf19 before e6e6882a1590cbdaca77a31a02f4954327237e14; affected 13e920d93e37fcaef4a9309515798a3cae9dcf19 before 4f619d518db9cd1a933c3a095a5f95d0c1584ae8 |
| Linux / Linux | affected 5.19; unaffected 0 before 5.19; unaffected 6.1.124 through 6.1.*; unaffected 6.6.70 through 6.6.*; unaffected 6.12.9 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b8ab9bd0c8855cd5a6f4e0265083576257ff3fc5
- https://git.kernel.org/stable/c/0cd3bde081cd3452c875fa1e5c55834c670d6e05
- https://git.kernel.org/stable/c/e6e6882a1590cbdaca77a31a02f4954327237e14
- https://git.kernel.org/stable/c/4f619d518db9cd1a933c3a095a5f95d0c1584ae8
ADP enrichment
No English description supplied.