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From: Kacper Kornet <kornet@camk.edu.pl>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, Jiri Slaby <jslaby@suse.cz>
Subject: [PATCH v2] Fix prlimit64 for suid/sgid processes
Date: Sat, 29 Jan 2011 00:21:04 +0100	[thread overview]
Message-ID: <20110128232104.GA22667@camk.edu.pl> (raw)
In-Reply-To: <AANLkTimOM7KDtFkU=CmXZ8J2FqekY=EjCuOdtZHQJQWT@mail.gmail.com>

Since check_prlimit_permission always fails in the case of SUID/GUID
processes, such processes are not able to read or set their own limits.
This commit changes this by assuming that process can always read/change
its own limits.

Signed-off-by: Kacper Kornet <kornet@camk.edu.pl>
---
 kernel/sys.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/kernel/sys.c b/kernel/sys.c
index e9ad444..03bead7 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1375,7 +1375,8 @@ static int check_prlimit_permission(struct task_struct *task)
 	const struct cred *cred = current_cred(), *tcred;
 
 	tcred = __task_cred(task);
-	if ((cred->uid != tcred->euid ||
+	if (current != task &&
+	    (cred->uid != tcred->euid ||
 	     cred->uid != tcred->suid ||
 	     cred->uid != tcred->uid  ||
 	     cred->gid != tcred->egid ||
-- 
1.7.3.5

-- 
  Kacper 

  reply	other threads:[~2011-01-28 23:21 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-27 13:47 [PATCH] " Kacper Kornet
2011-01-27 22:59 ` Linus Torvalds
2011-01-28 23:21   ` Kacper Kornet [this message]
2011-01-28 23:28     ` [PATCH v2] " Jiri Slaby
2011-01-31  9:40     ` [for .36,.37 stable] " Jiri Slaby
2011-02-15 14:28       ` [stable] [for .36, .37 " Greg KH

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