[patch 34/76] file capabilities: simplify signal check

[Chris Wright]

-stable review patch.  If anyone has any objections, please let us know.
---------------------

From: Serge E. Hallyn <serue@xxxxxxxxxx>

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@xxxxxxxxxx>
Signed-off-by: Andrew G. Morgan <morgan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
 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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