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[PATCH] unshare: Error if passed unsupported flags

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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>
This commit is contained in:
Eric W. Biederman 2006-03-22 00:07:40 -08:00 • committed by Linus Torvalds
parent b40607fc02
commit 06f9d4f94a
1 changed files with 6 additions and 0 deletions
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6
kernel/fork.c
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@ -1534,6 +1534,12 @@ asmlinkage long sys_unshare(unsigned long unshare_flags)
check_unshare_flags(&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))) if ((err = unshare_thread(unshare_flags)))
goto bad_unshare_out; goto bad_unshare_out;
if ((err = unshare_fs(unshare_flags, &new_fs))) if ((err = unshare_fs(unshare_flags, &new_fs)))