Description
In the Linux kernel, the following vulnerability has been resolved:
fs/proc: fix softlockup in __read_vmcore (part 2)
Since commit 5cbcb62dddf5 ("fs/proc: fix softlockup in __read_vmcore") the number of softlockups in __read_vmcore at kdump time have gone down, but they still happen sometimes.
In a memory constrained environment like the kdump image, a softlockup is not just a harmless message, but it can interfere with things like RCU freeing memory, causing the crashdump to get stuck.
The second loop in __read_vmcore has a lot more opportunities for natural sleep points, like scheduling out while waiting for a data write to happen, but apparently that is not always enough.
Add a cond_resched() to the second loop in __read_vmcore to (hopefully) get rid of the softlockups.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 803d5a33d5ffdc2d86dcc0cfa01655a330612cdb, < 84c4ed15626574c9ac6c1039ba9c137a77bcc7f2; >= 70c1835e776c8447c1aca87ddb38cfe764fe756a, < 80da29deb88a3a907441fc35bb7bac309f31e713; >= e1b160a50c756e0efbea290b9bf5117cb80e8c4b, < 649b266606bc413407ce315f710c8ce8a88ee30a; >= a373ad833a6bfe4bc6cedcf7e56a99cc6fd9a193, < 65c367bd9d4f43513c7f837df5753bea9561b836; >= 518fbd644dabb6aedbdd4939c6c9cc1bf651459f, < a5a2ee8144c3897d37403a69118c3e3dc5713958; >= 5cbcb62dddf5346077feb82b7b0c9254222d3445, < 80828540dad0757b6337c6561d49c81038f38d87; >= 5cbcb62dddf5346077feb82b7b0c9254222d3445, < cbc5dde0a461240046e8a41c43d7c3b76d5db952; 7bdf1d550ddfcd9ab797087421f77b7aceddc8a7; e8780e8a0e25dc4c3927f611ec8970d26c0c7369; >= 5.4.279, < 5.4.290; >= 5.10.221, < 5.10.234; >= 5.15.162, < 5.15.177; >= 6.1.95, < 6.1.127; >= 6.6.35, < 6.6.74; >= 4.19.317, < 4.20; >= 6.9.6, < 6.10 |
| Linux | Linux | 6.10 |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.0, < V3.1.5 |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.0, < V3.1.5 |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | >= V3.1.0, < V3.1.5 |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | >= V3.1.0, < V3.1.5 |
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | < * |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.0, < V3.1.5 |
| Siemens | RUGGEDCOM RST2428P | < V3.2 |
| Siemens | SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family | < V3.2 |
| Siemens | SCALANCE XCM-/XRM-/XCH-/XRH-300 family | < V3.2 |
References
- https://git.kernel.org/stable/c/649b266606bc413407ce315f710c8ce8a88ee30aPatch
- https://git.kernel.org/stable/c/65c367bd9d4f43513c7f837df5753bea9561b836Patch
- https://git.kernel.org/stable/c/80828540dad0757b6337c6561d49c81038f38d87Patch
- https://git.kernel.org/stable/c/80da29deb88a3a907441fc35bb7bac309f31e713Patch
- https://git.kernel.org/stable/c/84c4ed15626574c9ac6c1039ba9c137a77bcc7f2Patch
- https://git.kernel.org/stable/c/a5a2ee8144c3897d37403a69118c3e3dc5713958Patch
- https://git.kernel.org/stable/c/cbc5dde0a461240046e8a41c43d7c3b76d5db952Patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
Timeline
- Published
- Feb 12, 2025
- Last modified
- Oct 15, 2026
- NVD status
- Modified