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authorColin Ian King <[email protected]>2022-12-02 13:51:49 +0000
committerPeter Zijlstra <[email protected]>2022-12-27 12:44:00 +0100
commit08245672cdc6505550d1a5020603b0a8d4a6dcc7 (patch)
tree98a01f344a7b4888c3247ae02b5329a486883a5b /scripts/gdb/linux/genpd.py
parentf841b682baef90ee144df8b12e2c76aa460717c1 (diff)
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 <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Ian Rogers <[email protected]> Acked-by: Kim Phillips <[email protected]> Link: https://lore.kernel.org/r/[email protected]
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