CVE-2023-54235
Description
In the Linux kernel, the following vulnerability has been resolved: PCI/DOE: Fix destroy_work_on_stack() race The following debug object splat was observed in testing: ODEBUG: free active (active state 0) object: 0000000097d23782 object type: work_struct hint: doe_statemachine_work+0x0/0x510 WARNING: CPU: 1 PID: 71 at lib/debugobjects.c:514 debug_print_object+0x7d/0xb0 ... Workqueue: pci 0000:36:00.0 DOE [1 doe_statemachine_work RIP: 0010:debug_print_object+0x7d/0xb0 ... Call Trace: ? debug_print_object+0x7d/0xb0 ? __pfx_doe_statemachine_work+0x10/0x10 debug_object_free.part.0+0x11b/0x150 doe_statemachine_work+0x45e/0x510 process_one_work+0x1d4/0x3c0 This occurs because destroy_work_on_stack() was called after signaling the completion in the calling thread. This creates a race between destroy_work_on_stack() and the task->work struct going out of scope in pci_doe(). Signal the work complete after destroying the work struct. This is safe because signal_task_complete() is the final thing the work item does and the workqueue code is careful not to access the work struct after.
How to fix
- Linux Linuxd96799ee3b78962c80e4b6653734f488f999ca09, c4f9c0a3a6df143f2e1092823b7fa9e07d6ab57f, 19cf3ba16dcc2ef059dcf010072d4f96d76486e0, e3a3a097eaebaf234a482b4d2f9f18fe989208c1, 6.1.53, 6.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 2a0e0f4773fe8032fb17e56f897bee32ce3cdc2b ≤ v < d96799ee3b78962c80e4b6653734f488f999ca09, abf04be0e7071f2bcd39bf97ba407e7d4439785e ≤ v < c4f9c0a3a6df143f2e1092823b7fa9e07d6ab57f, abf04be0e7071f2bcd39bf97ba407e7d4439785e ≤ v < 19cf3ba16dcc2ef059dcf010072d4f96d76486e0, abf04be0e7071f2bcd39bf97ba407e7d4439785e ≤ v < e3a3a097eaebaf234a482b4d2f9f18fe989208c1, 95628b830952943631d3d74f73f431f501c5d6f5, 6.1.24 ≤ v < 6.1.53, 6.2.11 ≤ v < 6.3, 6.3 | d96799ee3b78962c80e4b6653734f488f999ca09, c4f9c0a3a6df143f2e1092823b7fa9e07d6ab57f, 19cf3ba16dcc2ef059dcf010072d4f96d76486e0, e3a3a097eaebaf234a482b4d2f9f18fe989208c1, 6.1.53, 6.3 |
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