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authorChen Gang <gang.chen@asianux.com>2014-01-27 17:07:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-27 21:02:40 -0800
commita19428e5c3f4f39c302cb97b847dfd23613145c1 (patch)
treeef2341c5034451ae55e5c0ca0a727a4455ec6c44 /kernel/kexec.c
parent53e0ee9fc59cb17fcad57e481b5889c791afe6c3 (diff)
downloadlinux-next-a19428e5c3f4f39c302cb97b847dfd23613145c1.tar.gz
kernel/kexec.c: use vscnprintf() instead of vsnprintf() in vmcoreinfo_append_str()
vsnprintf() may let 'r' larger than sizeof(buf), in this case, if 'r' is also less than "vmcoreinfo_max_size - vmcoreinfo_size" (left size of destination buffer), next memcpy() will read the unexpected addresses. Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/kexec.c')
-rw-r--r--kernel/kexec.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/kexec.c b/kernel/kexec.c
index ac738781d356..60bafbed06ab 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1537,7 +1537,7 @@ void vmcoreinfo_append_str(const char *fmt, ...)
size_t r;
va_start(args, fmt);
- r = vsnprintf(buf, sizeof(buf), fmt, args);
+ r = vscnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
r = min(r, vmcoreinfo_max_size - vmcoreinfo_size);