CVEvulnerability
CVE-2025-68173
- Status
- Deferred
- Published
- 2025-12-16
- Last modified
- 2026-10-14
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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.
References
- https://git.kernel.org/stable/c/4099b98203d6b33d990586542fa5beee408032a3 git.kernel.org
- https://git.kernel.org/stable/c/40c8ee40e48a2c82c762539952ed8fc0571db5bf git.kernel.org
- https://git.kernel.org/stable/c/7e3c96010ade29bb340a5bdce8675f50c7f59001 git.kernel.org
- https://git.kernel.org/stable/c/a1dd0abd741a8111260676da729825d6c1461a71 git.kernel.org
- https://git.kernel.org/stable/c/e81e6d6d99b16dae11adbeda5c996317942a940c git.kernel.org