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commit7f9f7c6974upstream. 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(). Fixes:773ca82fa1("raid5: make release_stripe lockless") Cc: stable@vger.kernel.org Signed-off-by: FengWei Shih <dannyshih@synology.com> Signed-off-by: Chia-Ming Chang <chiamingc@synology.com> Link: https://lore.kernel.org/linux-raid/20260402061406.455755-1-chiamingc@synology.com/ Signed-off-by: Yu Kuai <yukuai@fnnas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
8847 lines
249 KiB
8847 lines
249 KiB