ghsa-x3q5-jcq9-7rv7
Vulnerability from github
Published
2025-09-15 15:31
Modified
2025-09-15 15:31
VLAI Severity ?
Details
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().
{
"affected": [],
"aliases": [
"CVE-2022-50314"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-15T15:15:43Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: Fix hung when signal interrupts nbd_start_device_ioctl()\n\nsyzbot reported hung task [1]. The following program is a simplified\nversion of the reproducer:\n\nint main(void)\n{\n\tint sv[2], fd;\n\n\tif (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) \u003c 0)\n\t\treturn 1;\n\tif ((fd = open(\"/dev/nbd0\", 0)) \u003c 0)\n\t\treturn 1;\n\tif (ioctl(fd, NBD_SET_SIZE_BLOCKS, 0x81) \u003c 0)\n\t\treturn 1;\n\tif (ioctl(fd, NBD_SET_SOCK, sv[0]) \u003c 0)\n\t\treturn 1;\n\tif (ioctl(fd, NBD_DO_IT) \u003c 0)\n\t\treturn 1;\n\treturn 0;\n}\n\nWhen signal interrupt nbd_start_device_ioctl() waiting the condition\natomic_read(\u0026config-\u003erecv_threads) == 0, the task can hung because it\nwaits the completion of the inflight IOs.\n\nThis patch fixes the issue by clearing queue, not just shutdown, when\nsignal interrupt nbd_start_device_ioctl().",
"id": "GHSA-x3q5-jcq9-7rv7",
"modified": "2025-09-15T15:31:27Z",
"published": "2025-09-15T15:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50314"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1de7c3cf48fc41cd95adb12bd1ea9033a917798a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3575949513ea3b387b30dac1e69468a923c86caf"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/35fb7d4a53d9e36d1b91161ea9870d9c6d57dccf"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3ba3846cb3e2fb3c6fbf79e998472821b298419e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/62006a72b05e0d38727eef5188700f2488be5e89"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b2700f98b3f4dd19fb4315b70581e5caff89eb49"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c0d73be0af8c1310713bc39a8d7a22e35084e14f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c7b4641bd2395c2f3cd3b0a0cbf292ed9d489398"
}
],
"schema_version": "1.4.0",
"severity": []
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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