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ftp/sftp: strdup data info memory

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Fix the broken implementation to have `data->state` carry pointers into
connectdata members. Always dup the memory and free when easy handle
closes.

Closes #16733
This commit is contained in:
Stefan Eissing 2025-03-15 11:20:15 +01:00 • committed by Daniel Stenberg
parent d12129dda5
commit ebce3f0c02
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GPG key ID: 5CC908FDB71E12C2
4 changed files with 18 additions and 15 deletions
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7
lib/vssh/libssh.c
View file

@ -944,7 +944,10 @@ static CURLcode myssh_statemach_act(struct Curl_easy *data, bool *block)
MOVE_TO_ERROR_STATE(CURLE_COULDNT_CONNECT);
break;
}
data->state.most_recent_ftp_entrypath = sshc->homedir;
free(data->state.most_recent_ftp_entrypath);
data->state.most_recent_ftp_entrypath = strdup(sshc->homedir);
if(!data->state.most_recent_ftp_entrypath)
return CURLE_OUT_OF_MEMORY;
/* This is the last step in the SFTP connect phase. Do note that while
we get the homedir here, we get the "workingpath" in the DO action
@ -1763,7 +1766,6 @@ static CURLcode myssh_statemach_act(struct Curl_easy *data, bool *block)
}
SSH_STRING_FREE_CHAR(sshc->homedir);
data->state.most_recent_ftp_entrypath = NULL;
state(data, SSH_SESSION_DISCONNECT);
break;
@ -1939,7 +1941,6 @@ static CURLcode myssh_statemach_act(struct Curl_easy *data, bool *block)
}
SSH_STRING_FREE_CHAR(sshc->homedir);
data->state.most_recent_ftp_entrypath = NULL;
state(data, SSH_SESSION_FREE);
FALLTHROUGH();

7
lib/vssh/libssh2.c
View file

@ -2008,7 +2008,10 @@ static CURLcode ssh_statemachine(struct Curl_easy *data, bool *block)
sshc->actualcode = CURLE_OUT_OF_MEMORY;
break;
}
data->state.most_recent_ftp_entrypath = sshc->homedir;
free(data->state.most_recent_ftp_entrypath);
data->state.most_recent_ftp_entrypath = strdup(sshc->homedir);
if(!data->state.most_recent_ftp_entrypath)
return CURLE_OUT_OF_MEMORY;
}
else {
/* Return the error type */
@ -2591,7 +2594,6 @@ static CURLcode ssh_statemachine(struct Curl_easy *data, bool *block)
}
Curl_safefree(sshc->homedir);
data->state.most_recent_ftp_entrypath = NULL;
state(data, SSH_SESSION_DISCONNECT);
break;
@ -2857,7 +2859,6 @@ static CURLcode ssh_statemachine(struct Curl_easy *data, bool *block)
}
Curl_safefree(sshc->homedir);
data->state.most_recent_ftp_entrypath = NULL;
state(data, SSH_SESSION_FREE);
break;