From: Enzo Matsumiya <ematsumiya@suse.de>
To: linux-cifs@vger.kernel.org
Cc: smfrench@gmail.com, pc@manguebit.com, ronniesahlberg@gmail.com,
sprasad@microsoft.com, tom@talpey.com, bharathsm@microsoft.com,
henrique.carvalho@suse.com
Subject: [PATCH 2/8] smb: client: compress: fix bad encoding on last LZ77 flag
Date: Mon, 13 Apr 2026 16:07:07 -0300 [thread overview]
Message-ID: <20260413190713.283939-2-ematsumiya@suse.de> (raw)
In-Reply-To: <20260413190713.283939-1-ematsumiya@suse.de>
End-of-stream flag could lead to UB because of int promotion
(overwriting signed bit).
Fix it by changing operand from '1' to '1UL'.
Signed-off-by: Enzo Matsumiya <ematsumiya@suse.de>
---
fs/smb/client/compress/lz77.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/smb/client/compress/lz77.c b/fs/smb/client/compress/lz77.c
index 16c7d8f3ef17..c1e7fada6e61 100644
--- a/fs/smb/client/compress/lz77.c
+++ b/fs/smb/client/compress/lz77.c
@@ -216,7 +216,7 @@ noinline int lz77_compress(const void *src, u32 slen, void *dst, u32 *dlen)
}
flag <<= (32 - flag_count);
- flag |= (1 << (32 - flag_count)) - 1;
+ flag |= (1UL << (32 - flag_count)) - 1;
lz77_write32(flag_pos, flag);
*dlen = dstp - dst;
--
2.53.0
next prev parent reply other threads:[~2026-04-13 19:07 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-13 19:07 [PATCH 1/8] smb: client: compress: fix buffer overrun in lz77_compress() Enzo Matsumiya
2026-04-13 19:07 ` Enzo Matsumiya [this message]
2026-04-19 1:35 ` [PATCH 2/8] smb: client: compress: fix bad encoding on last LZ77 flag Steve French
2026-04-13 19:07 ` [PATCH 3/8] smb: client: compress: fix counting in LZ77 match finding Enzo Matsumiya
2026-04-13 19:07 ` [PATCH 4/8] smb: client: compress: increase LZ77_MATCH_MAX_DIST Enzo Matsumiya
2026-04-13 19:07 ` [PATCH 5/8] smb: client: compress: LZ77 optimizations Enzo Matsumiya
2026-04-13 19:07 ` [PATCH 6/8] smb: client: compress: add code docs to lz77.c Enzo Matsumiya
2026-04-13 19:07 ` [PATCH 7/8] smb: client: compress: add compress/common.h Enzo Matsumiya
2026-04-20 21:24 ` Nathan Chancellor
2026-04-20 21:31 ` Steve French
2026-04-13 19:07 ` [PATCH 8/8] smb: common: add SMB3_COMPRESS_MAX_ALGS Enzo Matsumiya
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