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| author |   Sidong Yang <sidong.yang@furiosa.ai> | 2025-03-19 11:24:01 +0000 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2025-04-01 01:02:26 +0200 |
| commit | 8e587ab43cb92a9e57f99ea8d6c069ee65863707 (patch) | |
| tree | 1e82ee19972a0678b1982a6e0dbedb97bd81522b | |
| parent | btrfs: zoned: fix zone finishing with missing devices (diff) | |
| download | wireguard-linux-8e587ab43cb92a9e57f99ea8d6c069ee65863707.tar.xz wireguard-linux-8e587ab43cb92a9e57f99ea8d6c069ee65863707.zip | |
btrfs: ioctl: don't free iov when btrfs_encoded_read() returns -EAGAIN
Fix a bug in encoded read that mistakenly frees the iov in case
btrfs_encoded_read() returns -EAGAIN assuming the structure will be
reused. This can happen when when receiving requests concurrently, the
io_uring subsystem does not reset the data, and the last free will
happen in btrfs_uring_read_finished().
Handle the -EAGAIN error and skip freeing iov.
CC: stable@vger.kernel.org # 6.13+
Signed-off-by: Sidong Yang <sidong.yang@furiosa.ai>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/btrfs/ioctl.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index a13d81bb56a0..63aeacc54945 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -4902,6 +4902,8 @@ static int btrfs_uring_encoded_read(struct io_uring_cmd *cmd, unsigned int issue ret = btrfs_encoded_read(&kiocb, &data->iter, &data->args, &cached_state, &disk_bytenr, &disk_io_size); + if (ret == -EAGAIN) + goto out_acct; if (ret < 0 && ret != -EIOCBQUEUED) goto out_free; |