[for-next][PATCH 10/24] seq_buf: Use size_t for len in seq_buf_puts()

From: Steven Rostedt
Date: Fri Dec 21 2018 - 12:58:35 EST

From: Michael Ellerman <mpe@xxxxxxxxxxxxxx>

Jann Horn points out that we're using unsigned int for len in
seq_buf_puts(), which could potentially overflow if we're passed a
UINT_MAX sized string.

The rest of the code already uses size_t, so we should also use that
in seq_buf_puts() to avoid any issues.

Link: http://lkml.kernel.org/r/20181019042109.8064-2-mpe@xxxxxxxxxxxxxx

Suggested-by: Jann Horn <jannh@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
lib/seq_buf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/seq_buf.c b/lib/seq_buf.c
index 6aabb609dd87..bd807f545a9d 100644
--- a/lib/seq_buf.c
+++ b/lib/seq_buf.c
@@ -140,7 +140,7 @@ int seq_buf_bprintf(struct seq_buf *s, const char *fmt, const u32 *binary)
int seq_buf_puts(struct seq_buf *s, const char *str)
- unsigned int len = strlen(str);
+ size_t len = strlen(str);

WARN_ON(s->size == 0);