From bc46dfac2f21756642e549b05689e03db538639f Mon Sep 17 00:00:00 2001
From: Jayachandran Chandrasekharan Nair <jayachandranc@netlogicmicro.com>
Date: Tue, 10 Jul 2012 11:48:54 +0530
Subject: [PATCH] net: tftp: fix type of block arg to store_block
The block argument for store_block can be -1 when the tftp sequence
number rolls over (i.e TftpBlock == 0), so the first argument to
store_block has to be of type 'int' instead of 'unsigned'.
In our environment (gcc 4.4.5 mips toolchain), this causes incorrect
'offset' to be generated for storing the block, and the tftp block
with number 0 will be written elsewhere, resulting in a bad block in
the downloaded file and a memory corruption.
Signed-off-by: Jayachandran Chandrasekharan Nair <jayachandranc@netlogicmicro.com>
---
net/tftp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/tftp.c b/net/tftp.c
index b2e08b4bfb..59a8ebb3cf 100644
--- a/net/tftp.c
+++ b/net/tftp.c
@@ -156,7 +156,7 @@ mcast_cleanup(void)
#endif /* CONFIG_MCAST_TFTP */
static inline void
-store_block(unsigned block, uchar *src, unsigned len)
+store_block(int block, uchar *src, unsigned len)
{
ulong offset = block * TftpBlkSize + TftpBlockWrapOffset;
ulong newsize = offset + len;
--
2.39.5