Description
In the Linux kernel, the following vulnerability has been resolved: md/raid5: fix soft lockup in retry_aligned_read() When retry_aligned_read() encounters an overlapped stripe, it releases the stripe via raid5_release_stripe() which puts it on the lockless released_stripes llist. In the next raid5d loop iteration, release_stripe_list() drains the stripe onto handle_list (since STRIPE_HANDLE is set by the original IO), but retry_aligned_read() runs before handle_active_stripes() and removes the stripe from handle_list via find_get_stripe() -> list_del_init(). This prevents handle_stripe() from ever processing the stripe to resolve the overlap, causing an infinite loop and soft lockup. Fix this by using __release_stripe() with temp_inactive_list instead of raid5_release_stripe() in the failure path, so the stripe does not go through the released_stripes llist. This allows raid5d to break out of its loop, and the overlap will be resolved when the stripe is eventually processed by handle_stripe().
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
773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 to < 66df9f30673db66ac35145820a8e24906069ae57affected773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 to < 4166d5234fe8b6c3c7f796a6c198605356c5b355affected773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 to < a9055300e07d9d6800264d3c2560e1d0144689caaffected773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 to < 09880592f5a9dc73377d6eb5ac123537b5f8df49affected773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 to < 80fc6ca2cbde018d52e13f305edcd643911bd94baffected773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 to < 1985cb3247e87ff6b8ca4bc5f9626f4f51024507affected773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 to < 883cc33b7af1c448663287f069ef9dfea001e90faffected773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 to < 7f9f7c697474268d9ef9479df3ddfe7cdcfbbffcaffected
Linux Linux
Default version status: affected
3.12affected0 to < 3.12unaffected5.10.258 to ≤ 5.10.*unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.140 to ≤ 6.6.*unaffected6.12.86 to ≤ 6.12.*unaffected6.18.27 to ≤ 6.18.*unaffected7.0.4 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/66df9f30673db66ac35145820a8e24906069ae57 ↗
- https://git.kernel.org/stable/c/4166d5234fe8b6c3c7f796a6c198605356c5b355 ↗
- https://git.kernel.org/stable/c/a9055300e07d9d6800264d3c2560e1d0144689ca ↗
- https://git.kernel.org/stable/c/09880592f5a9dc73377d6eb5ac123537b5f8df49 ↗
- https://git.kernel.org/stable/c/80fc6ca2cbde018d52e13f305edcd643911bd94b ↗
- https://git.kernel.org/stable/c/1985cb3247e87ff6b8ca4bc5f9626f4f51024507 ↗
- https://git.kernel.org/stable/c/883cc33b7af1c448663287f069ef9dfea001e90f ↗
- https://git.kernel.org/stable/c/7f9f7c697474268d9ef9479df3ddfe7cdcfbbffc ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗