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authorAurelien Aptel <aaptel@suse.com>2019-09-16 04:28:36 +0200
committerSteve French <stfrench@microsoft.com>2019-09-16 11:43:38 -0500
commit0892ba693f304ce3e9ca1f0a64a5cfc051454996 (patch)
tree59678f1b7714176901261169a26f5a01ac90e4a2 /fs
parent2255397c33425b9c43e36ab01479842258dedccb (diff)
cifs: modefromsid: make room for 4 ACE
when mounting with modefromsid, we end up writing 4 ACE in a security descriptor that only has room for 3, thus triggering an out-of-bounds write. fix this by changing the min size of a security descriptor. Signed-off-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/cifsacl.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/cifs/cifsacl.h b/fs/cifs/cifsacl.h
index dd95a6fa24bf..eb428349f29a 100644
--- a/fs/cifs/cifsacl.h
+++ b/fs/cifs/cifsacl.h
@@ -45,7 +45,7 @@
*/
#define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \
sizeof(struct cifs_acl) + \
- (sizeof(struct cifs_ace) * 3))
+ (sizeof(struct cifs_ace) * 4))
/*
* Maximum size of a string representation of a SID: