RHBZ: 1972502 PATH_MAX is 4096 but PAGE_SIZE can be >4096 on some architectures such as ppc and would thus write beyond the end of the actual object. CC: Stable <stable@xxxxxxxxxxxxxxx> Reported-by: Xiaoli Feng <xifeng@xxxxxxxxxx> Suggested-by: Brian foster <bfoster@xxxxxxxxxx> Signed-off-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx> --- fs/cifs/dir.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index 79402ca0ddfa..5f8a302ffcb2 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -100,7 +100,7 @@ build_path_from_dentry_optional_prefix(struct dentry *direntry, void *page, if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) pplen = cifs_sb->prepath ? strlen(cifs_sb->prepath) + 1 : 0; - s = dentry_path_raw(direntry, page, PAGE_SIZE); + s = dentry_path_raw(direntry, page, PATH_MAX); if (IS_ERR(s)) return s; if (!s[1]) // for root we want "", not "/" -- 2.30.2
