CVE-2025-68173
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
16/12/2025
Last modified:
18/12/2025
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
ftrace: Fix softlockup in ftrace_module_enable<br />
<br />
A soft lockup was observed when loading amdgpu module.<br />
If a module has a lot of tracable functions, multiple calls<br />
to kallsyms_lookup can spend too much time in RCU critical<br />
section and with disabled preemption, causing kernel panic.<br />
This is the same issue that was fixed in<br />
commit d0b24b4e91fc ("ftrace: Prevent RCU stall on PREEMPT_VOLUNTARY<br />
kernels") and commit 42ea22e754ba ("ftrace: Add cond_resched() to<br />
ftrace_graph_set_hash()").<br />
<br />
Fix it the same way by adding cond_resched() in ftrace_module_enable.
Impact
References to Advisories, Solutions, and Tools
- https://git.kernel.org/stable/c/4099b98203d6b33d990586542fa5beee408032a3
- https://git.kernel.org/stable/c/40c8ee40e48a2c82c762539952ed8fc0571db5bf
- https://git.kernel.org/stable/c/7e3c96010ade29bb340a5bdce8675f50c7f59001
- https://git.kernel.org/stable/c/a1dd0abd741a8111260676da729825d6c1461a71
- https://git.kernel.org/stable/c/e81e6d6d99b16dae11adbeda5c996317942a940c



