diff options
| author | Edward O'Callaghan <eocallaghan@alterapraxis.com> | 2014-05-22 03:36:22 +1000 |
|---|---|---|
| committer | Marc Jones <marc.jones@se-eng.com> | 2014-05-21 21:35:16 +0200 |
| commit | 3312ed7e7a0b3269d6559207cdf9ed932ffecd31 (patch) | |
| tree | 226a81ddc59f953ce12921d9fce566e100630ca0 /src/vendorcode/amd/agesa/f15tn | |
| parent | 2c9e3706469e65629d6e74b5a43df9277f176933 (diff) | |
amd/agesa/f1?/Lib/amdlib.c: Integer overflow in loop construct
The semantics of this loop relies on an integer overflow in Index >=0
that implies a return value of (UINT8)-1 which around wraps to 0xFF, or
VOLT_UNSUPPORTED.
Change-Id: I44d68973d0a80093350b2a8a4d3b46bfbb57917a
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5801
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
Diffstat (limited to 'src/vendorcode/amd/agesa/f15tn')
| -rw-r--r-- | src/vendorcode/amd/agesa/f15tn/Lib/amdlib.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/vendorcode/amd/agesa/f15tn/Lib/amdlib.c b/src/vendorcode/amd/agesa/f15tn/Lib/amdlib.c index 55adc8a478..9646e6d3b9 100644 --- a/src/vendorcode/amd/agesa/f15tn/Lib/amdlib.c +++ b/src/vendorcode/amd/agesa/f15tn/Lib/amdlib.c @@ -359,11 +359,11 @@ LibAmdBitScanReverse ( IN UINT32 value ) { - UINTN Index; + UINT8 Index; for (Index = 31; Index >= 0; Index--){ - if (value & (1 << Index)) break; + if (value & (1 << Index)) return Index; } - return (UINT8) Index; + return 0xFF; } VOID LibAmdMsrRead ( |