linux-kernel - [PATCH 37/44] lib/crypto/mpi: use min() instead of min

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251119224140.8616-38-david.laight.linux@gmail.com>
Date: Wed, 19 Nov 2025 22:41:33 +0000
From: david.laight.linux@...il.com
To: linux-kernel@...r.kernel.org,
	linux-crypto@...r.kernel.org
Cc: Ard Biesheuvel <ardb@...nel.org>,
	Eric Biggers <ebiggers@...nel.org>,
	"Jason A. Donenfeld" <Jason@...c4.com>,
	David Laight <david.laight.linux@...il.com>
Subject: [PATCH 37/44] lib/crypto/mpi: use min() instead of min_t()

From: David Laight <david.laight.linux@...il.com>

min_t(unsigned int, a, b) casts an 'unsigned long' to 'unsigned int'.
Use min(a, b) instead as it promotes any 'unsigned int' to 'unsigned long'
and so cannot discard significant bits.

In this case the 'unsigned long' value is small enough that the result
is ok.

Detected by an extra check added to min_t().

Signed-off-by: David Laight <david.laight.linux@...il.com>
---
 lib/crypto/mpi/mpicoder.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/crypto/mpi/mpicoder.c b/lib/crypto/mpi/mpicoder.c
index 47f6939599b3..bf716a03c704 100644
--- a/lib/crypto/mpi/mpicoder.c
+++ b/lib/crypto/mpi/mpicoder.c
@@ -398,7 +398,7 @@ MPI mpi_read_raw_from_sgl(struct scatterlist *sgl, unsigned int nbytes)
 
 	while (sg_miter_next(&miter)) {
 		buff = miter.addr;
-		len = min_t(unsigned, miter.length, nbytes);
+		len = min(miter.length, nbytes);
 		nbytes -= len;
 
 		for (x = 0; x < len; x++) {
-- 
2.39.5