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Fix GError handling

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Several users have reported segfaults when starting up profanity which
has OMEMO support, but OMEMO is not set up yet.

@StefanKropp has been able to reproduce this and tracked it down to
`_load_identity()` calling `omemo_known_devices_keyfile_save()`.
The latter then calls `save_keyfile()` which calls
`g_key_file_save_to_file()`. This can then fail if one of the first two
strings is NULL and won't set the `error` on return. In its error handling
`save_keyfile()` unconditionally dereferences `error` which leads to the
segfault.

Fix this and also go through the entire codebase and verify that the usage
of `GError` is done correctly.

Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>
This commit is contained in:
Steffen Jaeckel
2025-10-09 10:23:00 +02:00
parent 5da079bbb2
commit 48ac88de08
15 changed files with 57 additions and 66 deletions
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12
src/tools/editor.c
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@@ -55,7 +55,7 @@ get_message_from_editor(gchar* message, gchar** returned_message)
*returned_message = NULL;
auto_gchar gchar* filename = NULL;
GError* glib_error = NULL;
auto_gerror GError* glib_error = NULL;
const char* jid = connection_get_barejid();
if (jid) {
filename = files_file_in_account_data_path(DIR_EDITOR, jid, "compose.md");
@@ -78,10 +78,7 @@ get_message_from_editor(gchar* message, gchar** returned_message)
}
if (!g_file_set_contents(filename, message, messagelen, &glib_error)) {
log_error("[Editor] could not write to %s: %s", filename, glib_error ? glib_error->message : "No GLib error given");
if (glib_error) {
g_error_free(glib_error);
}
log_error("[Editor] could not write to %s: %s", filename, PROF_GERROR_MESSAGE(glib_error));
return TRUE;
}
@@ -106,10 +103,7 @@ get_message_from_editor(gchar* message, gchar** returned_message)
gchar* contents;
gsize length;
if (!g_file_get_contents(filename, &contents, &length, &glib_error)) {
log_error("[Editor] could not read from %s: %s", filename, glib_error ? glib_error->message : "No GLib error given");
if (glib_error) {
g_error_free(glib_error);
}
log_error("[Editor] could not read from %s: %s", filename, PROF_GERROR_MESSAGE(glib_error));
return TRUE;
}
/* Remove all trailing new-line characters */