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| author | Jiufei Xue <jiufei.xue@linux.alibaba.com> | 2020-09-01 13:35:02 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-09-01 08:04:58 -0600 |
| commit | 98dfd5024a2e9e170b85c07078e2d89f20a5dfbd (patch) | |
| tree | 84aedd19ec15ce61c55093cf6ed3adf7078d0736 | |
| parent | fdee946d0925f971f167d2606984426763355e4f (diff) | |
| download | linux-98dfd5024a2e9e170b85c07078e2d89f20a5dfbd.tar.gz | |
io_uring: fix removing the wrong file in __io_sqe_files_update()
Index here is already the position of the file in fixed_file_table, we
should not use io_file_from_index() again to get it. Otherwise, the
wrong file which still in use may be released unexpectedly.
Cc: stable@vger.kernel.org # v5.6
Fixes: 05f3fb3c5397 ("io_uring: avoid ring quiesce for fixed file set unregister and update")
Signed-off-by: Jiufei Xue <jiufei.xue@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | fs/io_uring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 852c2eaf1a9ac7..a06b5628903944 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -7324,7 +7324,7 @@ static int __io_sqe_files_update(struct io_ring_ctx *ctx, table = &ctx->file_data->table[i >> IORING_FILE_TABLE_SHIFT]; index = i & IORING_FILE_TABLE_MASK; if (table->files[index]) { - file = io_file_from_index(ctx, index); + file = table->files[index]; err = io_queue_file_removal(data, file); if (err) break; |