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| author | Colin Ian King <colin.i.king@gmail.com> | 2022-12-02 13:51:49 +0000 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-12-27 12:44:00 +0100 |
| commit | 08245672cdc6505550d1a5020603b0a8d4a6dcc7 (patch) | |
| tree | 98a01f344a7b4888c3247ae02b5329a486883a5b /kernel/events | |
| parent | f841b682baef90ee144df8b12e2c76aa460717c1 (diff) | |
| download | linux-08245672cdc6505550d1a5020603b0a8d4a6dcc7.tar.bz2 | |
perf/x86/amd: fix potential integer overflow on shift of a int
The left shift of int 32 bit integer constant 1 is evaluated using 32 bit
arithmetic and then passed as a 64 bit function argument. In the case where
i is 32 or more this can lead to an overflow. Avoid this by shifting
using the BIT_ULL macro instead.
Fixes: 471af006a747 ("perf/x86/amd: Constrain Large Increment per Cycle events")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Ian Rogers <irogers@google.com>
Acked-by: Kim Phillips <kim.phillips@amd.com>
Link: https://lore.kernel.org/r/20221202135149.1797974-1-colin.i.king@gmail.com
Diffstat (limited to 'kernel/events')
0 files changed, 0 insertions, 0 deletions