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| author | Chuck Lever <chuck.lever@oracle.com> | 2023-12-31 01:46:00 +0100 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2024-01-23 16:58:56 +0100 |
| commit | 42c3732fa8073717dd7d924472f1c0bc5b452fdc (patch) | |
| tree | d62658e93e5fe91a8e0e75b7c1ab90d384c90e54 /fs/namei.c | |
| parent | exportfs: fix the fallback implementation of the get_name export operation (diff) | |
| download | linux-42c3732fa8073717dd7d924472f1c0bc5b452fdc.tar.xz linux-42c3732fa8073717dd7d924472f1c0bc5b452fdc.zip | |
fs: Create a generic is_dot_dotdot() utility
De-duplicate the same functionality in several places by hoisting
the is_dot_dotdot() utility function into linux/fs.h.
Suggested-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Acked-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/namei.c b/fs/namei.c index 71c13b2990b4..2386a70667fa 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2667,10 +2667,8 @@ static int lookup_one_common(struct mnt_idmap *idmap, if (!len) return -EACCES; - if (unlikely(name[0] == '.')) { - if (len < 2 || (len == 2 && name[1] == '.')) - return -EACCES; - } + if (is_dot_dotdot(name, len)) + return -EACCES; while (len--) { unsigned int c = *(const unsigned char *)name++; |