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Commit b0f8ef20 authored by Santosh Nayak's avatar Santosh Nayak Committed by Steve French
Browse files

cifs: possible memory leak in xattr. 



Memory is allocated irrespective of whether CIFS_ACL is configured
or not. But free is happenning only if CIFS_ACL is set. This is a
possible memory leak scenario.

Fix is:
Allocate and free memory only if CIFS_ACL is configured.

Signed-off-by: default avatarSantosh Nayak <santoshprasadnayak@gmail.com>
Reviewed-by: default avatarShirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent 55062d06

fs/cifs/xattr.c

+3 −3
Original line number Diff line number Diff line
@@ -105,7 +105,6 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name, 
	struct cifs_tcon *pTcon;

	struct super_block *sb;

	char *full_path;

	struct cifs_ntsd *pacl;



	if (direntry == NULL)

		return -EIO;
@@ -164,23 +163,24 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name, 
			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);

	} else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,

			strlen(CIFS_XATTR_CIFS_ACL)) == 0) {

#ifdef CONFIG_CIFS_ACL

		struct cifs_ntsd *pacl;

		pacl = kmalloc(value_size, GFP_KERNEL);

		if (!pacl) {

			cFYI(1, "%s: Can't allocate memory for ACL",

					__func__);

			rc = -ENOMEM;

		} else {

#ifdef CONFIG_CIFS_ACL

			memcpy(pacl, ea_value, value_size);

			rc = set_cifs_acl(pacl, value_size,

				direntry->d_inode, full_path, CIFS_ACL_DACL);

			if (rc == 0) /* force revalidate of the inode */

				CIFS_I(direntry->d_inode)->time = 0;

			kfree(pacl);

		}

#else

			cFYI(1, "Set CIFS ACL not supported yet");

#endif /* CONFIG_CIFS_ACL */

		}

	} else {

		int temp;

		temp = strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,