Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix softlockup in ftrace_module_enable A soft lockup was observed when loading amdgpu module. If a module has a lot of tracable functions, multiple calls to kallsyms_lookup can spend too much time in RCU critical section and with disabled preemption, causing kernel panic. This is the same issue that was fixed in commit d0b24b4e91fc ("ftrace: Prevent RCU stall on PREEMPT_VOLUNTARY kernels") and commit 42ea22e754ba ("ftrace: Add cond_resched() to ftrace_graph_set_hash()"). Fix it the same way by adding cond_resched() in ftrace_module_enable.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b7ffffbb46f205e7727a18bcc7a46c3c2b534f7c before a1dd0abd741a8111260676da729825d6c1461a71; affected b7ffffbb46f205e7727a18bcc7a46c3c2b534f7c before e81e6d6d99b16dae11adbeda5c996317942a940c; affected b7ffffbb46f205e7727a18bcc7a46c3c2b534f7c before 40c8ee40e48a2c82c762539952ed8fc0571db5bf; affected b7ffffbb46f205e7727a18bcc7a46c3c2b534f7c before 7e3c96010ade29bb340a5bdce8675f50c7f59001; affected b7ffffbb46f205e7727a18bcc7a46c3c2b534f7c before 4099b98203d6b33d990586542fa5beee408032a3 |
| Linux / Linux | affected 4.5; unaffected 0 before 4.5; unaffected 6.1.159 through 6.1.*; unaffected 6.6.117 through 6.6.*; unaffected 6.12.58 through 6.12.*; unaffected 6.17.8 through 6.17.*; unaffected 6.18 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a1dd0abd741a8111260676da729825d6c1461a71
- https://git.kernel.org/stable/c/e81e6d6d99b16dae11adbeda5c996317942a940c
- https://git.kernel.org/stable/c/40c8ee40e48a2c82c762539952ed8fc0571db5bf
- https://git.kernel.org/stable/c/7e3c96010ade29bb340a5bdce8675f50c7f59001
- https://git.kernel.org/stable/c/4099b98203d6b33d990586542fa5beee408032a3