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Smack: Safer check for a socket in file_receive

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The check of S_ISSOCK() in smack_file_receive() is not
appropriate if the passed descriptor is a socket.

Reported-by: Stephen Smalley <[email protected]>
Signed-off-by: Casey Schaufler <[email protected]>
This commit is contained in:
Casey Schaufler 2017-05-31 08:53:42 -07:00
commit 51d59af26f
1 changed files with 1 additions and 1 deletions
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2
security/smack/smack_lsm.c
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@ -1915,7 +1915,7 @@ static int smack_file_receive(struct file *file)
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path);
if (S_ISSOCK(inode->i_mode)) {
if (inode->i_sb->s_magic == SOCKFS_MAGIC) {
sock = SOCKET_I(inode);
ssp = sock->sk->sk_security;
tsp = current_security();