| commit | 10632008b9e18b76cbff0ffc69c15e948aa548e0 | [log] [tgz] |
|---|---|---|
| author | Thomas Gleixner <tglx@linutronix.de> | Mon Oct 20 15:07:50 2014 +0400 |
| committer | Thomas Gleixner <tglx@linutronix.de> | Sat Oct 25 10:43:15 2014 +0200 |
| tree | 4694d20120da394c2d501ef7eb4b9f7d5dd8ec90 | |
| parent | 6891c4509c792209c44ced55a60f13954cb50ef4 [diff] |
clockevents: Prevent shift out of bounds
Andrey reported that on a kernel with UBSan enabled he found:
UBSan: Undefined behaviour in ../kernel/time/clockevents.c:75:34
I guess it should be 1ULL here instead of 1U:
(!ismax || evt->mult <= (1U << evt->shift)))
That's indeed the correct solution because shift might be 32.
Reported-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>