blob: fc29e61e1c8fd83c8396ae37e4048e7a77d9f944 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: trigger segfault. A recent 6.4-rc kernel introduced a bug
* via vhost where segfaults for applications using io_uring
* would hang in D state forever upon trying to generate the
* core file. Perform a trivial test where a child process
* generates a NULL pointer dereference and ensure that we don't
* hang.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include "liburing.h"
#include "helpers.h"
#ifndef CONFIG_USE_SANITIZER
static void test(void)
{
struct io_uring_sqe *sqe;
struct io_uring ring;
int *ptr = NULL;
int fds[2];
char r1;
if (pipe(fds) < 0) {
perror("pipe");
exit(0);
}
io_uring_queue_init(8, &ring, 0);
sqe = io_uring_get_sqe(&ring);
io_uring_prep_read(sqe, fds[0], &r1, sizeof(r1), 0);
sqe->flags = IOSQE_ASYNC;
sqe->user_data = 1;
io_uring_submit(&ring);
*ptr = 0;
exit(0);
}
int main(int argc, char *argv[])
{
pid_t pid;
int wstat;
pid = fork();
if (pid < 0) {
perror("fork");
return T_EXIT_SKIP;
} else if (!pid) {
test();
}
wait(&wstat);
unlink("core");
return T_EXIT_PASS;
}
#else
int main(int argc, char *argv[])
{
return T_EXIT_SKIP;
}
#endif
|
