From: Eric W. Biederman Date: Wed, 22 Mar 2006 08:07:40 +0000 (-0800) Subject: [PATCH] unshare: Error if passed unsupported flags X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=06f9d4f94a075285d25253edbf57f2cda07d4ff3;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git [PATCH] unshare: Error if passed unsupported flags A bare bones trivial patch to ensure we always get -EINVAL on the unsupported cases for sys_unshare. If this goes in before 2.6.16 it allows us to forward compatible with future applications using sys_unshare. Signed-off-by: Eric W. Biederman Cc: JANAK DESAI Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/kernel/fork.c b/kernel/fork.c index b373322ca497..9bd7b65ee418 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1534,6 +1534,12 @@ asmlinkage long sys_unshare(unsigned long unshare_flags) check_unshare_flags(&unshare_flags); + /* Return -EINVAL for all unsupported flags */ + err = -EINVAL; + if (unshare_flags & ~(CLONE_THREAD|CLONE_FS|CLONE_NEWNS|CLONE_SIGHAND| + CLONE_VM|CLONE_FILES|CLONE_SYSVSEM)) + goto bad_unshare_out; + if ((err = unshare_thread(unshare_flags))) goto bad_unshare_out; if ((err = unshare_fs(unshare_flags, &new_fs)))