{"id":"CVE-2022-50314","summary":"nbd: Fix hung when signal interrupts nbd_start_device_ioctl()","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(&config-\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().","modified":"2026-04-11T12:44:55.864187Z","published":"2025-09-15T14:46:09.240Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50314.json"},"references":[{"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"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50314.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50314"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5ea8d10802ec4c153a6e21eebaf412e2abd29736"},{"fixed":"3ba3846cb3e2fb3c6fbf79e998472821b298419e"},{"fixed":"c7b4641bd2395c2f3cd3b0a0cbf292ed9d489398"},{"fixed":"3575949513ea3b387b30dac1e69468a923c86caf"},{"fixed":"b2700f98b3f4dd19fb4315b70581e5caff89eb49"},{"fixed":"c0d73be0af8c1310713bc39a8d7a22e35084e14f"},{"fixed":"62006a72b05e0d38727eef5188700f2488be5e89"},{"fixed":"35fb7d4a53d9e36d1b91161ea9870d9c6d57dccf"},{"fixed":"1de7c3cf48fc41cd95adb12bd1ea9033a917798a"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50314.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.12.0"},{"fixed":"4.14.296"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.262"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.220"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.150"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.75"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"5.19.17"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.20.0"},{"fixed":"6.0.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50314.json"}}],"schema_version":"1.7.5"}