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authorEric W. Biederman <ebiederm@xmission.com>2006-03-22 00:07:40 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-22 07:53:55 -0800
commit06f9d4f94a075285d25253edbf57f2cda07d4ff3 (patch)
tree56a3d3c05606811b15ab7b301c25815e9ac5e1e8 /kernel/fork.c
parentb40607fc02f8248828d52d88f91b7d68df1933b0 (diff)
downloadlinux-06f9d4f94a075285d25253edbf57f2cda07d4ff3.tar.bz2
[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 <ebiederm@xmission.com> Cc: JANAK DESAI <janak@us.ibm.com> Cc: <stable@kerenl.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c6
1 files changed, 6 insertions, 0 deletions
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)))