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authorFedor Pchelkin <pchelkin@ispras.ru>2024-01-09 17:14:44 +0300
committerSteve French <stfrench@microsoft.com>2024-01-09 19:27:36 -0600
commit8cf9bedfc3c47d24bb0de386f808f925dc52863e (patch)
treee7c8db7e9ca26fd266cc040117015fa3886ca0e8 /fs/smb/server
parent3fc74c65b367476874da5fe6f633398674b78e5a (diff)
ksmbd: free ppace array on error in parse_dacl
The ppace array is not freed if one of the init_acl_state() calls inside parse_dacl() fails. At the moment the function may fail only due to the memory allocation errors so it's highly unlikely in this case but nevertheless a fix is needed. Move ppace allocation after the init_acl_state() calls with proper error handling. Found by Linux Verification Center (linuxtesting.org). Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3") Cc: stable@vger.kernel.org Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru> Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/smb/server')
-rw-r--r--fs/smb/server/smbacl.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/smb/server/smbacl.c b/fs/smb/server/smbacl.c
index 1164365533f0..1c9775f1efa5 100644
--- a/fs/smb/server/smbacl.c
+++ b/fs/smb/server/smbacl.c
@@ -401,10 +401,6 @@ static void parse_dacl(struct mnt_idmap *idmap,
if (num_aces > ULONG_MAX / sizeof(struct smb_ace *))
return;
- ppace = kmalloc_array(num_aces, sizeof(struct smb_ace *), GFP_KERNEL);
- if (!ppace)
- return;
-
ret = init_acl_state(&acl_state, num_aces);
if (ret)
return;
@@ -414,6 +410,13 @@ static void parse_dacl(struct mnt_idmap *idmap,
return;
}
+ ppace = kmalloc_array(num_aces, sizeof(struct smb_ace *), GFP_KERNEL);
+ if (!ppace) {
+ free_acl_state(&default_acl_state);
+ free_acl_state(&acl_state);
+ return;
+ }
+
/*
* reset rwx permissions for user/group/other.
* Also, if num_aces is 0 i.e. DACL has no ACEs,