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io_uring/futex: always remove futex entry for cancel all 

We know the request is either being removed, or already in the process of
being removed through task_work, so we can delete it from our futex list
upfront. This is important for remove all conditions, as we otherwise
will find it multiple times and prevent cancelation progress.

Cc: stable@vger.kernel.org
Fixes: 194bb58c60 ("io_uring: add support for futex wake and wait")
Fixes: 8f350194d5 ("io_uring: add support for vectored futex waits")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2024-03-15 15:37:15 -06:00
parent 5e3afe580a
commit 30dab608c3
1 changed files with 1 additions and 0 deletions
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io_uring/futex.c
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@ -159,6 +159,7 @@ bool io_futex_remove_all(struct io_ring_ctx *ctx, struct task_struct *task,
hlist_for_each_entry_safe(req, tmp, &ctx->futex_list, hash_node) {
if (!io_match_task_safe(req, task, cancel_all))
continue;
hlist_del_init(&req->hash_node);
__io_futex_cancel(ctx, req);
found = true;
}