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io_uring: ensure fput() called correspondingly when direct install fails

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io_fixed_fd_install() may fail for short of free fixed file bitmap,
in this case, need to call fput() correspondingly.

Signed-off-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220527025400.51048-1-xiaoguang.wang@linux.alibaba.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Xiaoguang Wang 2022-05-27 10:54:00 +08:00 • committed by Jens Axboe
parent fa82dd105b
commit 8c71fe7502
1 changed files with 5 additions and 0 deletions
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5
fs/io_uring.c
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@ -5438,6 +5438,10 @@ static int io_file_bitmap_get(struct io_ring_ctx *ctx)
return -ENFILE; return -ENFILE;
} }
/*
* Note when io_fixed_fd_install() returns error value, it will ensure
* fput() is called correspondingly.
*/
static int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags, static int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags,
struct file *file, unsigned int file_slot) struct file *file, unsigned int file_slot)
{ {
@ -5450,6 +5454,7 @@ static int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags,
ret = io_file_bitmap_get(ctx); ret = io_file_bitmap_get(ctx);
if (unlikely(ret < 0)) { if (unlikely(ret < 0)) {
io_ring_submit_unlock(ctx, issue_flags); io_ring_submit_unlock(ctx, issue_flags);
fput(file);
return ret; return ret;
} }