5.15-stable review patch. If anyone has any objections, please let me know.
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From: Luis Henriques (SUSE) luis.henriques@linux.dev
commit 04e6ce8f06d161399e5afde3df5dcfa9455b4952 upstream.
Calling ext4_fc_mark_ineligible() with a NULL handle is racy and may result in a fast-commit being done before the filesystem is effectively marked as ineligible. This patch moves the call to this function so that an handle can be used. If a transaction fails to start, then there's not point in trying to mark the filesystem as ineligible, and an error will eventually be returned to user-space.
Suggested-by: Jan Kara jack@suse.cz Signed-off-by: Luis Henriques (SUSE) luis.henriques@linux.dev Reviewed-by: Jan Kara jack@suse.cz Link: https://patch.msgid.link/20240923104909.18342-3-luis.henriques@linux.dev Signed-off-by: Theodore Ts'o tytso@mit.edu Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ext4/xattr.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -2512,6 +2512,8 @@ retry:
error = ext4_xattr_set_handle(handle, inode, name_index, name, value, value_len, flags); + ext4_fc_mark_ineligible(inode->i_sb, EXT4_FC_REASON_XATTR, + handle); error2 = ext4_journal_stop(handle); if (error == -ENOSPC && ext4_should_retry_alloc(sb, &retries)) @@ -2519,7 +2521,6 @@ retry: if (error == 0) error = error2; } - ext4_fc_mark_ineligible(inode->i_sb, EXT4_FC_REASON_XATTR, NULL);
return error; }