tree 997be12ea9a9d13824fc082cf22831dbdc51838e
parent ca12910b1509a83aabfdb7ee9282256455dfc9bd
author Willy Tarreau <w@1wt.eu> 1421335793 +0100
committer Willy Tarreau <w@1wt.eu> 1421335982 +0100
encoding latin1

BUG/MAJOR: log: don't try to emit a log if no logger is set

send_log() calls update_hdr() to build a log header. It may happen
that no logger is defined at all but that we try to send a log anyway
(eg: upon startup). This results in a segfault when building the log
header because logline was never allocated.

This bug was revealed by the recent log-tag changes because the logline
is dereferenced after the call to snprintf(). So in 1.5 on most platforms
it has no impact because snprintf() will ignore NULL, but not necessarily
on all platforms.

The fix needs to be backported to 1.5.
(cherry picked from commit 8c97ab5eb2da447441932ad35b06dc94574140ad)