perf/x86/amd: fix potential integer overflow on shift of a int
commit 08245672cdc6505550d1a5020603b0a8d4a6dcc7 upstream.
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
Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Loading
Please register or sign in to comment