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Fix potential null-pointer dereference in ssh_reconfig.

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ssh->base_layer is NULL when the connection is still in its early
stages, before greetings are exchanged. If the user invokes the Change
Settings dialog in this situation, ssh_reconfig would call
ssh_ppl_reconfigure() on ssh->base_layer without checking if it was
NULL first.

(cherry picked from commit d67c13eeb8bf64516aac6c2752eb835e9bc7105a)
This commit is contained in:
Simon Tatham 2023-04-10 16:13:36 +01:00
parent f17daf6cc7
commit c545c04102
1 changed files with 2 additions and 1 deletions
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ssh/ssh.c
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@ -1038,6 +1038,7 @@ static void ssh_reconfig(Backend *be, Conf *conf)
if (ssh->pinger) if (ssh->pinger)
pinger_reconfig(ssh->pinger, ssh->conf, conf); pinger_reconfig(ssh->pinger, ssh->conf, conf);
if (ssh->base_layer)
ssh_ppl_reconfigure(ssh->base_layer, conf); ssh_ppl_reconfigure(ssh->base_layer, conf);
conf_free(ssh->conf); conf_free(ssh->conf);