lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 16 Jan 2014 10:39:30 -0800 From: tip-bot for Peter Zijlstra <tipbot@...or.com> To: linux-tip-commits@...r.kernel.org Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org, peterz@...radead.org, tglx@...utronix.de, daniel.lezcano@...aro.org Subject: [tip:sched/core] sched: Fix __sched_setscheduler() nice test Commit-ID: eaad45132c564ce377e6dce05e78e08e456d5315 Gitweb: http://git.kernel.org/tip/eaad45132c564ce377e6dce05e78e08e456d5315 Author: Peter Zijlstra <peterz@...radead.org> AuthorDate: Thu, 16 Jan 2014 17:54:25 +0100 Committer: Ingo Molnar <mingo@...nel.org> CommitDate: Thu, 16 Jan 2014 18:07:08 +0100 sched: Fix __sched_setscheduler() nice test With the introduction of sched_attr::sched_nice we need to check if we've got permission to actually change the nice value. Daniel found that can_nice() would always fail; and upon inspection it turns out that can_nice() only tests to see if we can lower the nice value, but it doesn't validate if we're lowering or not. Therefore amend the test to only call can_nice() when we lower the nice value. Reported-and-Tested-by: Daniel Lezcano <daniel.lezcano@...aro.org> Signed-off-by: Peter Zijlstra <peterz@...radead.org> Cc: raistlin@...ux.it Cc: juri.lelli@...il.com Cc: Daniel Lezcano <daniel.lezcano@...aro.org> Fixes: d50dde5a10f3 ("sched: Add new scheduler syscalls to support an extended scheduling parameters ABI") Link: http://lkml.kernel.org/r/20140116165425.GA9481@laptop.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@...nel.org> --- kernel/sched/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 93a2836..36c951b 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3296,7 +3296,8 @@ recheck: */ if (user && !capable(CAP_SYS_NICE)) { if (fair_policy(policy)) { - if (!can_nice(p, attr->sched_nice)) + if (attr->sched_nice < TASK_NICE(p) && + !can_nice(p, attr->sched_nice)) return -EPERM; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists