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| author | David Jeffery <djeffery@redhat.com> | 2023-10-02 14:32:29 -0400 |
|---|---|---|
| committer | Song Liu <song@kernel.org> | 2023-10-03 08:53:09 -0700 |
| commit | 2fd7b0f6d5ad655b1d947d3acdd82f687c31465e (patch) | |
| tree | b786c0716dfd48329fa5c081a34e72a86258860c /tools/testing/selftests/bpf/prog_tests/sockmap_basic.c | |
| parent | a578a25339aca38e23bb5af6e3fc6c2c51f0215c (diff) | |
md/raid5: release batch_last before waiting for another stripe_head
When raid5_get_active_stripe is called with a ctx containing a stripe_head in
its batch_last pointer, it can cause a deadlock if the task sleeps waiting on
another stripe_head to become available. The stripe_head held by batch_last
can be blocking the advancement of other stripe_heads, leading to no
stripe_heads being released so raid5_get_active_stripe waits forever.
Like with the quiesce state handling earlier in the function, batch_last
needs to be released by raid5_get_active_stripe before it waits for another
stripe_head.
Fixes: 3312e6c887fe ("md/raid5: Keep a reference to last stripe_head for batch")
Cc: stable@vger.kernel.org # v6.0+
Signed-off-by: David Jeffery <djeffery@redhat.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20231002183422.13047-1-djeffery@redhat.com
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/sockmap_basic.c')
0 files changed, 0 insertions, 0 deletions