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Subject[patch 34/76] file capabilities: simplify signal check
-stable review patch.  If anyone has any objections, please let us know.
---------------------

From: Serge E. Hallyn <serue@us.ibm.com>

Simplify the uid equivalence check in cap_task_kill(). Anyone can kill a
process owned by the same uid.

Without this patch wireshark is reported to fail.

Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: Andrew G. Morgan <morgan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
security/commoncap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -539,7 +539,7 @@ int cap_task_kill(struct task_struct *p,
* allowed.
* We must preserve legacy signal behavior in this case.
*/
- if (p->euid == 0 && p->uid == current->uid)
+ if (p->uid == current->uid)
return 0;

/* sigcont is permitted within same session */
--


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