diff options
| author | Ondrej Zajicek (work) <santiago@crfreenet.org> | 2021-04-12 17:01:31 +0200 |
|---|---|---|
| committer | Ondrej Zajicek (work) <santiago@crfreenet.org> | 2021-04-12 17:01:31 +0200 |
| commit | 9c41e1ca3e93d4498eaa085139caf1545e08c1d8 (patch) | |
| tree | b8ab505a29b7b0e8a0f0fc1968999fc60f445e35 /lib/timer.c | |
| parent | a2277975d787fb388e753432673acefd69454b1a (diff) | |
Lib: Fix handling of buffers in timestamp formatting
The code in tm_format_real_time() mixed up two buffers and their
sizes, which may cause crash in MRT dumping code.
Thanks to Piotr Wydrych for the bugreport.
Diffstat (limited to 'lib/timer.c')
| -rw-r--r-- | lib/timer.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/timer.c b/lib/timer.c index a5abbcc4..381163d0 100644 --- a/lib/timer.c +++ b/lib/timer.c @@ -365,8 +365,9 @@ tm_format_real_time(char *x, size_t max, const char *fmt, btime t) if (!localtime_r(&ts, &tm)) return 0; - byte tbuf[TM_DATETIME_BUFFER_SIZE]; - if (!strfusec(tbuf, max, fmt, t2)) + size_t tbuf_size = MIN(max, 4096); + byte *tbuf = alloca(tbuf_size); + if (!strfusec(tbuf, tbuf_size, fmt, t2)) return 0; if (!strftime(x, max, tbuf, &tm)) |