bcachefs: varint: Avoid left-shift of a negative value

Shifting a negative value left is undefined. Signed-off-by: Tavian Barnes <[email protected]> Signed-off-by: Kent Overstreet <[email protected]>
wafgo · Jul 18, 2024 · ee1b8dc · ee1b8dc
1 parent 2e118ba
commit ee1b8dc
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/bcachefs/varint.c b/fs/bcachefs/varint.c
@@ -85,7 +85,7 @@ int bch2_varint_encode_fast(u8 *out, u64 v)
 
 	if (likely(bytes < 9)) {
 		v <<= bytes;
-		v |= ~(~0 << (bytes - 1));
+		v |= ~(~0U << (bytes - 1));
 	} else {
 		*out++ = 255;
 		bytes = 9;