proxmox-mirrors/mirror_frr
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_frr synced 2025-08-15 11:30:30 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

lib: fix log target removal when singlethreaded

Browse Source 
While running singlethreaded, the RCU code is "dormant" and rcu_free is
an immediate operation.  This results in the log target loop accessing
free'd memory if a log target removes itself while a message is printed
(which is likely to happen on e.g. error conditions.)

Just use frr_each_safe to avoid this issue.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
This commit is contained in:
David Lamparter 2022-03-05 19:39:53 +01:00
parent 404e53da28
commit d03440cab7
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
lib/zlog.c
View File

@ -401,7 +401,7 @@ void zlog_tls_buffer_flush(void)
return;
rcu_read_lock();
frr_each (zlog_targets, &zlog_targets, zt) {
frr_each_safe (zlog_targets, &zlog_targets, zt) {
if (!zt->logfn)
continue;
@ -431,7 +431,7 @@ static void vzlog_notls(const struct xref_logmsg *xref, int prio,
msg->stackbufsz = sizeof(stackbuf);
rcu_read_lock();
frr_each (zlog_targets, &zlog_targets, zt) {
frr_each_safe (zlog_targets, &zlog_targets, zt) {
if (prio > zt->prio_min)
continue;
if (!zt->logfn)