diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2025-11-10 14:21:18 +0100 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2025-11-12 11:36:20 +0100 |
| commit | 372a12bd5df0199aa234eaf8ef31ed7ecd61d40f (patch) | |
| tree | f7b9a5cd68bb249202741391cd1bda2f9c2d0158 | |
| parent | 394aa576c0b783ae728d87ed98fe4f1831dfd720 (diff) | |
lib/vsprintf: Check pointer before dereferencing in time_and_date()
The pointer may be invalid when gets to the printf(). In particular
the time_and_date() dereferencing it in some cases without checking.
Move the check from rtc_str() to time_and_date() to cover all cases.
Fixes: 7daac5b2fdf8 ("lib/vsprintf: Print time64_t in human readable format")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://patch.msgid.link/20251110132118.4113976-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
| -rw-r--r-- | lib/vsprintf.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index e49f350ee549..3f99834fd788 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1928,9 +1928,6 @@ char *rtc_str(char *buf, char *end, const struct rtc_time *tm, bool found = true; int count = 2; - if (check_pointer(&buf, end, tm, spec)) - return buf; - switch (fmt[count]) { case 'd': have_t = false; @@ -1996,6 +1993,9 @@ static noinline_for_stack char *time_and_date(char *buf, char *end, void *ptr, struct printf_spec spec, const char *fmt) { + if (check_pointer(&buf, end, ptr, spec)) + return buf; + switch (fmt[1]) { case 'R': return rtc_str(buf, end, (const struct rtc_time *)ptr, spec, fmt); |