Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
b7ffffbb46f205e7727a18bcc7a46c3c2b534f7c to < a1dd0abd741a8111260676da729825d6c1461a71affectedb7ffffbb46f205e7727a18bcc7a46c3c2b534f7c to < e81e6d6d99b16dae11adbeda5c996317942a940caffectedb7ffffbb46f205e7727a18bcc7a46c3c2b534f7c to < 40c8ee40e48a2c82c762539952ed8fc0571db5bfaffectedb7ffffbb46f205e7727a18bcc7a46c3c2b534f7c to < 7e3c96010ade29bb340a5bdce8675f50c7f59001affectedb7ffffbb46f205e7727a18bcc7a46c3c2b534f7c to < 4099b98203d6b33d990586542fa5beee408032a3affected
Linux Linux
Default version status: affected
4.5affected0 to < 4.5unaffected6.1.159 to ≤ 6.1.*unaffected6.6.117 to ≤ 6.6.*unaffected6.12.58 to ≤ 6.12.*unaffected6.17.8 to ≤ 6.17.*unaffected6.18 to ≤ *unaffected
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 ↗