Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 803d5a33d5ffdc2d86dcc0cfa01655a330612cdb before 84c4ed15626574c9ac6c1039ba9c137a77bcc7f2; affected 70c1835e776c8447c1aca87ddb38cfe764fe756a before 80da29deb88a3a907441fc35bb7bac309f31e713; affected e1b160a50c756e0efbea290b9bf5117cb80e8c4b before 649b266606bc413407ce315f710c8ce8a88ee30a; affected a373ad833a6bfe4bc6cedcf7e56a99cc6fd9a193 before 65c367bd9d4f43513c7f837df5753bea9561b836; affected 518fbd644dabb6aedbdd4939c6c9cc1bf651459f before a5a2ee8144c3897d37403a69118c3e3dc5713958; affected 5cbcb62dddf5346077feb82b7b0c9254222d3445 before 80828540dad0757b6337c6561d49c81038f38d87; affected 5cbcb62dddf5346077feb82b7b0c9254222d3445 before cbc5dde0a461240046e8a41c43d7c3b76d5db952; affected 7bdf1d550ddfcd9ab797087421f77b7aceddc8a7; affected e8780e8a0e25dc4c3927f611ec8970d26c0c7369; affected 5.4.279 before 5.4.290; affected 5.10.221 before 5.10.234; affected 5.15.162 before 5.15.177; affected 6.1.95 before 6.1.127; affected 6.6.35 before 6.6.74; affected 4.19.317 before 4.20; affected 6.9.6 before 6.10 |
| Linux / Linux | affected 6.10; unaffected 0 before 6.10; unaffected 5.4.290 through 5.4.*; unaffected 5.10.234 through 5.10.*; unaffected 5.15.177 through 5.15.*; unaffected 6.1.127 through 6.1.*; unaffected 6.6.74 through 6.6.*; unaffected 6.12.11 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/84c4ed15626574c9ac6c1039ba9c137a77bcc7f2
- https://git.kernel.org/stable/c/80da29deb88a3a907441fc35bb7bac309f31e713
- https://git.kernel.org/stable/c/649b266606bc413407ce315f710c8ce8a88ee30a
- https://git.kernel.org/stable/c/65c367bd9d4f43513c7f837df5753bea9561b836
- https://git.kernel.org/stable/c/a5a2ee8144c3897d37403a69118c3e3dc5713958
- https://git.kernel.org/stable/c/80828540dad0757b6337c6561d49c81038f38d87
- https://git.kernel.org/stable/c/cbc5dde0a461240046e8a41c43d7c3b76d5db952
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
No English description supplied.