CVE-2024-39469

Summary

In the Linux kernel, the following vulnerability has been resolved:

nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O errors

The error handling in nilfs_empty_dir() when a directory folio/page read fails is incorrect, as in the old ext2 implementation, and if the folio/page cannot be read or nilfs_check_folio() fails, it will falsely determine the directory as empty and corrupt the file system.

In addition, since nilfs_empty_dir() does not immediately return on a failed folio/page read, but continues to loop, this can cause a long loop with I/O if i_size of the directory's inode is also corrupted, causing the log writer thread to wait and hang, as reported by syzbot.

Fix these issues by making nilfs_empty_dir() immediately return a false value (0) if it fails to get a directory folio/page.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 2ac8a2fe22bdde9eecce2a42cf5cab79333fb428affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 405b71f1251e5ae865f53bd27c45114e6c83bee3affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < c77ad608df6c091fe64ecb91f41ef7cb465587f1affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 11a2edb70356a2202dcb7c9c189c8356ab4752cdaffected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 129dcd3e7d036218db3f59c82d82004b9539ed82affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < d18b05eda7fa77f02114f15b02c009f28ee42346affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 59f14875a96ef93f05b82ad3c980605f2cb444b5affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 7373a51e7998b508af7136530f3a997b286ce81caffected
LinuxLinux2.6.30affected
LinuxLinux0 < 2.6.30unaffected
LinuxLinux4.19.317 <= 4.19.*unaffected
LinuxLinux5.4.279 <= 5.4.*unaffected
LinuxLinux5.10.221 <= 5.10.*unaffected
LinuxLinux5.15.162 <= 5.15.*unaffected
LinuxLinux6.1.95 <= 6.1.*unaffected
LinuxLinux6.6.35 <= 6.6.*unaffected
LinuxLinux6.9.5 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References