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log: fixes legacy fallback for multiple sessions.

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Legacy code in 'ssh_set_callbacks' will fallback to
'ssh_legacy_log_callback' (if the current log cb is
NULL) setting the user data to the current session.

However, if any other session is created afterwards,
it won't update the user data with the new session,
potentially leading to a use-after-free.

Fixes #238.

Signed-off-by: Diego Roux <diegoroux04@protonmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This commit is contained in:
Diego Roux
2024-03-27 14:31:11 +00:00
committed by Jakub Jelen
parent 3227a4cae0
commit 46a28cfc49
6 changed files with 108 additions and 10 deletions
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13
tests/unittests/torture_callbacks.c
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@ -3,9 +3,10 @@
#define LIBSSH_STATIC
#include "torture.h"
#include <libssh/priv.h>
#include <errno.h>
#include <libssh/callbacks.h>
#include <libssh/misc.h>
#include <libssh/priv.h>
static int myauthcallback (const char *prompt, char *buf, size_t len,
int echo, int verify, void *userdata) {
@ -249,11 +250,15 @@ static void torture_callbacks_iterate(void **state){
int torture_run_tests(void) {
int rc;
struct CMUnitTest tests[] = {
cmocka_unit_test_setup_teardown(torture_callbacks_size, setup, teardown),
cmocka_unit_test_setup_teardown(torture_callbacks_exists, setup, teardown),
cmocka_unit_test_setup_teardown(torture_callbacks_size,
setup,
teardown),
cmocka_unit_test_setup_teardown(torture_callbacks_exists,
setup,
teardown),
cmocka_unit_test(torture_log_callback),
cmocka_unit_test(torture_callbacks_execute_list),
cmocka_unit_test(torture_callbacks_iterate)
cmocka_unit_test(torture_callbacks_iterate),
};
ssh_init();