4.0-stable review patch. If anyone has any objections, please let me know.
------------------ From: "J. Bruce Fields" <[email protected]> commit 9fc2b4b436cff7d8403034676014f1be9d534942 upstream. Before calling into the filesystem, vfs_setxattr calls security_inode_setxattr, which ends up calling selinux_inode_setxattr in our case. That returns -EOPNOTSUPP whenever SBLABEL_MNT is not set. SBLABEL_MNT was supposed to be set by sb_finish_set_opts, which sets it only if selinux_is_sblabel_mnt returns true. The selinux_is_sblabel_mnt logic was broken by eadcabc697e9 "SELinux: do all flags twiddling in one place", which didn't take into the account the SECURITY_FS_USE_NATIVE behavior that had been introduced for nfs with eb9ae686507b "SELinux: Add new labeling type native labels". This caused setxattr's of security labels over NFSv4.2 to fail. Cc: Eric Paris <[email protected]> Cc: David Quigley <[email protected]> Reported-by: Richard Chan <[email protected]> Signed-off-by: J. Bruce Fields <[email protected]> Acked-by: Stephen Smalley <[email protected]> [PM: added the stable dependency] Signed-off-by: Paul Moore <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- security/selinux/hooks.c | 1 + 1 file changed, 1 insertion(+) --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -404,6 +404,7 @@ static int selinux_is_sblabel_mnt(struct return sbsec->behavior == SECURITY_FS_USE_XATTR || sbsec->behavior == SECURITY_FS_USE_TRANS || sbsec->behavior == SECURITY_FS_USE_TASK || + sbsec->behavior == SECURITY_FS_USE_NATIVE || /* Special handling. Genfs but also in-core setxattr handler */ !strcmp(sb->s_type->name, "sysfs") || !strcmp(sb->s_type->name, "pstore") || -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
