3.8.13.3 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Jeff Layton <[email protected]> commit 1fc29bacedeabb278080e31bb9c1ecb49f143c3b upstream. commit 839db3d10a (cifs: fix up handling of prefixpath= option) changed the code such that the vol->prepath no longer contained a leading delimiter and then fixed up the places that accessed that field to account for that change. One spot in build_unc_path_to_root was missed however. When doing the pointer addition on pos, that patch failed to account for the fact that we had already incremented "pos" by one when adding the length of the prepath. This caused a buffer overrun by one byte. This patch fixes the problem by correcting the handling of "pos". Reported-by: Marcus Moeller <[email protected]> Reported-by: Ken Fallon <[email protected]> Signed-off-by: Jeff Layton <[email protected]> Signed-off-by: Steve French <[email protected]> Signed-off-by: Kamal Mostafa <[email protected]> --- fs/cifs/connect.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index f7199b9..c70d31a 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -3316,8 +3316,8 @@ build_unc_path_to_root(const struct smb_vol *vol, pos = full_path + unc_len; if (pplen) { - *pos++ = CIFS_DIR_SEP(cifs_sb); - strncpy(pos, vol->prepath, pplen); + *pos = CIFS_DIR_SEP(cifs_sb); + strncpy(pos + 1, vol->prepath, pplen); pos += pplen; } -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
