{"id":"CVE-2022-48635","summary":"fsdax: Fix infinite loop in dax_iomap_rw()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfsdax: Fix infinite loop in dax_iomap_rw()\n\nI got an infinite loop and a WARNING report when executing a tail command\nin virtiofs.\n\n  WARNING: CPU: 10 PID: 964 at fs/iomap/iter.c:34 iomap_iter+0x3a2/0x3d0\n  Modules linked in:\n  CPU: 10 PID: 964 Comm: tail Not tainted 5.19.0-rc7\n  Call Trace:\n  \u003cTASK\u003e\n  dax_iomap_rw+0xea/0x620\n  ? __this_cpu_preempt_check+0x13/0x20\n  fuse_dax_read_iter+0x47/0x80\n  fuse_file_read_iter+0xae/0xd0\n  new_sync_read+0xfe/0x180\n  ? 0xffffffff81000000\n  vfs_read+0x14d/0x1a0\n  ksys_read+0x6d/0xf0\n  __x64_sys_read+0x1a/0x20\n  do_syscall_64+0x3b/0x90\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThe tail command will call read() with a count of 0. In this case,\niomap_iter() will report this WARNING, and always return 1 which casuing\nthe infinite loop in dax_iomap_rw().\n\nFixing by checking count whether is 0 in dax_iomap_rw().","modified":"2026-05-18T05:55:14.392953503Z","published":"2024-04-28T12:59:24.359Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48635.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/17d9c15c9b9e7fb285f7ac5367dfb5f00ff575e3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/463f36137c40342fb03bba380c1bf703c40d89a6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/60644dffac87b1bb47bdb393aa29d5f2ffcf41a0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/929ef155e1da41c06f4d8ca86ae12b851a83a744"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48635.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-48635"},{"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":"8df4919cb921b28809d05feae3e98dc5d8b48146"},{"fixed":"463f36137c40342fb03bba380c1bf703c40d89a6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ca289e0b95afa973d204c77a4ad5c37e06145fbf"},{"fixed":"929ef155e1da41c06f4d8ca86ae12b851a83a744"},{"fixed":"60644dffac87b1bb47bdb393aa29d5f2ffcf41a0"},{"fixed":"17d9c15c9b9e7fb285f7ac5367dfb5f00ff575e3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48635.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.15.0"},{"fixed":"5.15.71"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"5.19.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48635.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}