| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.2 307/313] CIFS: fix max ea value size | Date | Thu, 3 Oct 2019 17:54:45 +0200 |
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From: Murphy Zhou <jencce.kernel@gmail.com>
commit 63d37fb4ce5ae7bf1e58f906d1bf25f036fe79b2 upstream.
It should not be larger then the slab max buf size. If user specifies a larger size, it passes this check and goes straightly to SMB2_set_info_init performing an insecure memcpy.
Signed-off-by: Murphy Zhou <jencce.kernel@gmail.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com> CC: Stable <stable@vger.kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/cifs/xattr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/cifs/xattr.c +++ b/fs/cifs/xattr.c @@ -31,7 +31,7 @@ #include "cifs_fs_sb.h" #include "cifs_unicode.h" -#define MAX_EA_VALUE_SIZE 65535 +#define MAX_EA_VALUE_SIZE CIFSMaxBufSize #define CIFS_XATTR_CIFS_ACL "system.cifs_acl" #define CIFS_XATTR_ATTRIB "cifs.dosattrib" /* full name: user.cifs.dosattrib */ #define CIFS_XATTR_CREATETIME "cifs.creationtime" /* user.cifs.creationtime */
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