Tracker / CVE-2022-50314
CVE-2022-50314
In the Linux kernel, the following vulnerability has been resolved: nbd: Fix hung when signal interrupts nbd_start_device_ioctl() syzbot reported hung task [1]. The following program is a simplified version of the reproducer: int main(void) { int sv[2], fd; if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) < 0) return 1; if ((fd = open("/dev/nbd0", 0)) < 0) return 1; if (ioctl(fd, NBD_SET_SIZE_BLOCKS, 0x81) < 0) return 1; if (ioctl(fd, NBD_SET_SOCK, sv[0]) < 0) return 1; if (ioctl(fd, NBD_DO_IT) < 0) return 1; return 0; } When signal interrupt nbd_start_device_ioctl() waiting the condition atomic_read(&config->recv_threads) == 0, the task can hung because it waits the completion of the inflight IOs. This patch fixes the issue by clearing queue, not just shutdown, when signal interrupt nbd_start_device_ioctl().
Prodotti e versioni affette
| linux | linux_kernel · … → 4.14.296 |
|---|---|
| linux | linux_kernel · 4.15 → 4.19.262 |
| linux | linux_kernel · 4.20 → 5.4.220 |
| linux | linux_kernel · 5.11 → 5.15.75 |
| linux | linux_kernel · 5.16 → 5.19.17 |
| linux | linux_kernel · 5.5 → 5.10.150 |
| linux | linux_kernel · 6.0 → 6.0.3 |