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| author | Chen Gang <gang.chen@asianux.com> | 2014-01-28 02:07:13 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-28 06:02:40 +0100 |
| commit | a19428e5c3f4f39c302cb97b847dfd23613145c1 (patch) | |
| tree | ef2341c5034451ae55e5c0ca0a727a4455ec6c44 | |
| parent | splice: fix unexpected size truncation (diff) | |
| download | linux-a19428e5c3f4f39c302cb97b847dfd23613145c1.tar.xz linux-a19428e5c3f4f39c302cb97b847dfd23613145c1.zip | |
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>
| -rw-r--r-- | kernel/kexec.c | 2 |
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); |