MF Symlinks are regular files containing content in a specified format. The function couldbe_mf_symlink() checks the mode for a set S_IFREG bit as a test to confirm that it is a regular file. This bit is also set for other filetypes and simply checking for this bit being set may return false positives.
We ensure that we are actually checking for a regular file by using the S_ISREG macro to test instead. Signed-off-by: Sachin Prabhu <[email protected]> Reported-by: Neil Brown <[email protected]> Reported-by: Dan Carpenter <[email protected]> --- fs/cifs/link.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/cifs/link.c b/fs/cifs/link.c index 52f41f9..264ece7 100644 --- a/fs/cifs/link.c +++ b/fs/cifs/link.c @@ -185,7 +185,7 @@ format_mf_symlink(u8 *buf, unsigned int buf_len, const char *link_str) bool couldbe_mf_symlink(const struct cifs_fattr *fattr) { - if (!(fattr->cf_mode & S_IFREG)) + if (!S_ISREG(fattr->cf_mode)) /* it's not a symlink */ return false; -- 1.8.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
