CVE-2022-48635 (GCVE-0-2022-48635)
Vulnerability from cvelistv5
Published
2024-04-28 12:59
Modified
2025-10-29 13:18
Severity ?
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: fsdax: Fix infinite loop in dax_iomap_rw() I got an infinite loop and a WARNING report when executing a tail command in virtiofs. WARNING: CPU: 10 PID: 964 at fs/iomap/iter.c:34 iomap_iter+0x3a2/0x3d0 Modules linked in: CPU: 10 PID: 964 Comm: tail Not tainted 5.19.0-rc7 Call Trace: <TASK> dax_iomap_rw+0xea/0x620 ? __this_cpu_preempt_check+0x13/0x20 fuse_dax_read_iter+0x47/0x80 fuse_file_read_iter+0xae/0xd0 new_sync_read+0xfe/0x180 ? 0xffffffff81000000 vfs_read+0x14d/0x1a0 ksys_read+0x6d/0xf0 __x64_sys_read+0x1a/0x20 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd The tail command will call read() with a count of 0. In this case, iomap_iter() will report this WARNING, and always return 1 which casuing the infinite loop in dax_iomap_rw(). Fixing by checking count whether is 0 in dax_iomap_rw().
References
Impacted products
Vendor Product Version
Linux Linux Version: 8df4919cb921b28809d05feae3e98dc5d8b48146
Version: ca289e0b95afa973d204c77a4ad5c37e06145fbf
Version: ca289e0b95afa973d204c77a4ad5c37e06145fbf
Version: ca289e0b95afa973d204c77a4ad5c37e06145fbf
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__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().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.71\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19.12\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0\", \"versionStartIncluding\": \"5.15\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-10-29T13:18:47.502Z\"}}}",
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
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  }
}


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