linux-kernel - [GIT PULL] timer fix

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Message-ID: <Zj4BMV2Cf9s0X/mn@gmail.com>
Date: Fri, 10 May 2024 13:12:49 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Anna-Maria Behnsen <anna-maria@...utronix.de>,
	Frederic Weisbecker <frederic@...nel.org>
Subject: [GIT PULL] timer fix

Linus,

Please pull the latest timers/urgent Git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers-urgent-2024-05-10

   # HEAD: d7ad05c86e2191bd66e5b62fca8da53c4a53484f timers/migration: Prevent out of bounds access on failure

Fix possible (but unlikely) out-of-bounds access in
the timer migration per-CPU-init code.

 Thanks,

	Ingo

------------------>
Levi Yun (1):
      timers/migration: Prevent out of bounds access on failure


 kernel/time/timer_migration.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/time/timer_migration.c b/kernel/time/timer_migration.c
index ccba875d2234..84413114db5c 100644
--- a/kernel/time/timer_migration.c
+++ b/kernel/time/timer_migration.c
@@ -1596,7 +1596,7 @@ static int tmigr_setup_groups(unsigned int cpu, unsigned int node)
 
 	} while (i < tmigr_hierarchy_levels);
 
-	do {
+	while (i > 0) {
 		group = stack[--i];
 
 		if (err < 0) {
@@ -1645,7 +1645,7 @@ static int tmigr_setup_groups(unsigned int cpu, unsigned int node)
 				tmigr_connect_child_parent(child, group);
 			}
 		}
-	} while (i > 0);
+	}
 
 	kfree(stack);