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SUNRPC: clean up integer overflow check 

This integer overflow check works as intended but Clang and GCC and warn
about it when compiling with W=1.

    include/linux/sunrpc/xdr.h:539:17: error: comparison is always false
    due to limited range of data type [-Werror=type-limits]

Use size_mul() to prevent the integer overflow.  It silences the warning
and it's cleaner as well.

Reported-by: Dmitry Antipov <dmantipov@yandex.ru>
Closes: https://lore.kernel.org/all/20230601143332.255312-1-dmantipov@yandex.ru/
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Dan Carpenter 2023-06-30 12:46:53 +03:00 committed by Anna Schumaker
parent f9597ba887
commit e87cf8a28e
1 changed files with 1 additions and 3 deletions
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4
include/linux/sunrpc/xdr.h
View File

@ -777,9 +777,7 @@ xdr_stream_decode_uint32_array(struct xdr_stream *xdr,
if (unlikely(xdr_stream_decode_u32(xdr, &len) < 0))
return -EBADMSG;
if (len > SIZE_MAX / sizeof(*p))
return -EBADMSG;
p = xdr_inline_decode(xdr, len * sizeof(*p));
p = xdr_inline_decode(xdr, size_mul(len, sizeof(*p)));
if (unlikely(!p))
return -EBADMSG;
if (array == NULL)