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CVE PROGRAM SOURCE RECORD5.5 Medium

CVE-2025-21694

fs/proc: fix softlockup in __read_vmcore (part 2)

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 803d5a33d5ffdc2d86dcc0cfa01655a330612cdb to < 84c4ed15626574c9ac6c1039ba9c137a77bcc7f2affected
  • 70c1835e776c8447c1aca87ddb38cfe764fe756a to < 80da29deb88a3a907441fc35bb7bac309f31e713affected
  • e1b160a50c756e0efbea290b9bf5117cb80e8c4b to < 649b266606bc413407ce315f710c8ce8a88ee30aaffected
  • a373ad833a6bfe4bc6cedcf7e56a99cc6fd9a193 to < 65c367bd9d4f43513c7f837df5753bea9561b836affected
  • 518fbd644dabb6aedbdd4939c6c9cc1bf651459f to < a5a2ee8144c3897d37403a69118c3e3dc5713958affected
  • 5cbcb62dddf5346077feb82b7b0c9254222d3445 to < 80828540dad0757b6337c6561d49c81038f38d87affected
  • 5cbcb62dddf5346077feb82b7b0c9254222d3445 to < cbc5dde0a461240046e8a41c43d7c3b76d5db952affected
  • 7bdf1d550ddfcd9ab797087421f77b7aceddc8a7affected
  • e8780e8a0e25dc4c3927f611ec8970d26c0c7369affected
  • 5.4.279 to < 5.4.290affected
  • 5.10.221 to < 5.10.234affected
  • 5.15.162 to < 5.15.177affected
  • 6.1.95 to < 6.1.127affected
  • 6.6.35 to < 6.6.74affected
  • 4.19.317 to < 4.20affected
  • 6.9.6 to < 6.10affected

Linux Linux

Default version status: affected

  • 6.10affected
  • 0 to < 6.10unaffected
  • 5.4.290 to ≤ 5.4.*unaffected
  • 5.10.234 to ≤ 5.10.*unaffected
  • 5.15.177 to ≤ 5.15.*unaffected
  • 6.1.127 to ≤ 6.1.*unaffected
  • 6.6.74 to ≤ 6.6.*unaffected
  • 6.12.11 to ≤ 6.12.*unaffected
  • 6.13 to ≤ *unaffected

References