This patch fixes a potential bug at drivers/char/hvc_beat.c.
- hvc_put_term_char routine will decrement "rest" variable twice,
and forget to advance "buf" pointer by "nlen" bytes.
This bug was not hit because the output handler in
drivers/char/hvc_console.c splits given output into 16 bytes
at maximum.
This patch is one of a series that I posted on Mar.14, "celleb:
patchset for 2.6.26 (take2)". I send this again because it
would be lost.
Reported-by: Timur Tabi <[EMAIL PROTECTED]>
Signed-off-by: Kou Ishizaki <[EMAIL PROTECTED]>
Acked-by: Arnd Bergmann <[EMAIL PROTECTED]>
---
drivers/char/hvc_beat.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
Index: b/drivers/char/hvc_beat.c
===================================================================
--- a/drivers/char/hvc_beat.c 2008-03-10 14:11:57.000000000 +0900
+++ b/drivers/char/hvc_beat.c 2008-03-10 14:13:40.000000000 +0900
@@ -78,8 +78,8 @@
for (rest = cnt; rest > 0; rest -= nlen) {
nlen = (rest > 16) ? 16 : rest;
memcpy(kb, buf, nlen);
- beat_put_term_char(vtermno, rest, kb[0], kb[1]);
- rest -= nlen;
+ beat_put_term_char(vtermno, nlen, kb[0], kb[1]);
+ buf += nlen;
}
return cnt;
}
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