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channels: Don't read from a closed channel

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Fixes T76

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Andreas Schneider
2018-09-04 20:33:21 +02:00
parent 1e195a232a
commit e558827c4e
1 changed files with 6 additions and 1 deletions
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7
src/channels.c
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@@ -2726,7 +2726,12 @@ int ssh_channel_read_timeout(ssh_channel channel,
if (rc == SSH_ERROR){ if (rc == SSH_ERROR){
return rc; return rc;
} }
if (session->session_state == SSH_SESSION_STATE_ERROR){
/*
* If the channel is closed or in an error state, reading from it is an error
*/
if (session->session_state == SSH_SESSION_STATE_ERROR ||
channel->state == SSH_CHANNEL_STATE_CLOSED) {
return SSH_ERROR; return SSH_ERROR;
} }
if (channel->remote_eof && ssh_buffer_get_len(stdbuf) == 0) { if (channel->remote_eof && ssh_buffer_get_len(stdbuf) == 0) {