| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37940: ftrace: Add cond_resched() to ftrace_graph_set_hash() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ftrace: Add cond_resched() to ftrace_graph_set_hash() |
| |
| When the kernel contains a large number of functions that can be traced, |
| the loop in ftrace_graph_set_hash() may take a lot of time to execute. |
| This may trigger the softlockup watchdog. |
| |
| Add cond_resched() within the loop to allow the kernel to remain |
| responsive even when processing a large number of functions. |
| |
| This matches the cond_resched() that is used in other locations of the |
| code that iterates over all functions that can be traced. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37940 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.11 with commit b9b0c831bed2682c2e3e9f5420fb6985549ef020 and fixed in 5.4.293 with commit e5b4ae6f01d4a510d5725eca7254519a1093920d |
| Issue introduced in 4.11 with commit b9b0c831bed2682c2e3e9f5420fb6985549ef020 and fixed in 5.10.237 with commit 618655d54c5f8af5d57b77491d08c0f0ff77d114 |
| Issue introduced in 4.11 with commit b9b0c831bed2682c2e3e9f5420fb6985549ef020 and fixed in 5.15.181 with commit dd38803c9088b848c6b56f4f6d7efc4497bfde61 |
| Issue introduced in 4.11 with commit b9b0c831bed2682c2e3e9f5420fb6985549ef020 and fixed in 6.1.135 with commit 8dd7d7280357596ba63dfdb4c1725d9dd24bd42a |
| Issue introduced in 4.11 with commit b9b0c831bed2682c2e3e9f5420fb6985549ef020 and fixed in 6.6.88 with commit 5d336ac215e5c76e43ef4bca9ba699835e53e2fd |
| Issue introduced in 4.11 with commit b9b0c831bed2682c2e3e9f5420fb6985549ef020 and fixed in 6.12.24 with commit 1fce9574b9d515bcb8a75379a8053e18602424e3 |
| Issue introduced in 4.11 with commit b9b0c831bed2682c2e3e9f5420fb6985549ef020 and fixed in 6.13.12 with commit 4429535acab750d963fdc3dfcc9e0eee42f4d599 |
| Issue introduced in 4.11 with commit b9b0c831bed2682c2e3e9f5420fb6985549ef020 and fixed in 6.14.3 with commit 72be43ff061a889c6ee648a330a42486cafa15a6 |
| Issue introduced in 4.11 with commit b9b0c831bed2682c2e3e9f5420fb6985549ef020 and fixed in 6.15 with commit 42ea22e754ba4f2b86f8760ca27f6f71da2d982c |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2025-37940 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| kernel/trace/ftrace.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/e5b4ae6f01d4a510d5725eca7254519a1093920d |
| https://git.kernel.org/stable/c/618655d54c5f8af5d57b77491d08c0f0ff77d114 |
| https://git.kernel.org/stable/c/dd38803c9088b848c6b56f4f6d7efc4497bfde61 |
| https://git.kernel.org/stable/c/8dd7d7280357596ba63dfdb4c1725d9dd24bd42a |
| https://git.kernel.org/stable/c/5d336ac215e5c76e43ef4bca9ba699835e53e2fd |
| https://git.kernel.org/stable/c/1fce9574b9d515bcb8a75379a8053e18602424e3 |
| https://git.kernel.org/stable/c/4429535acab750d963fdc3dfcc9e0eee42f4d599 |
| https://git.kernel.org/stable/c/72be43ff061a889c6ee648a330a42486cafa15a6 |
| https://git.kernel.org/stable/c/42ea22e754ba4f2b86f8760ca27f6f71da2d982c |
