CVE-2024-27389

Summary

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

pstore: inode: Only d_invalidate() is needed

Unloading a modular pstore backend with records in pstorefs would trigger the dput() double-drop warning:

WARNING: CPU: 0 PID: 2569 at fs/dcache.c:762 dput.part.0+0x3f3/0x410

Using the combo of d_drop()/dput() (as mentioned in Documentation/filesystems/vfs.rst) isn't the right approach here, and leads to the reference counting problem seen above. Use d_invalidate() and update the code to not bother checking for error codes that can never happen.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux609e28bb139e53621521130f0d4aea27a725d465 < d0ee2a8adb6673382cce8a4280e1ca0849b3b783affected
LinuxLinux609e28bb139e53621521130f0d4aea27a725d465 < db6e5e16f1ee9e3b01d2f71c7f0ba945f4bf0f4eaffected
LinuxLinux609e28bb139e53621521130f0d4aea27a725d465 < 4cdf9006fc095af71da80e9b5f48a32e991b9ed3affected
LinuxLinux609e28bb139e53621521130f0d4aea27a725d465 < cb9e802e49c24eeb3af35e9e8c04d526f35f112aaffected
LinuxLinux609e28bb139e53621521130f0d4aea27a725d465 < 340682ed1932b8e3bd0bfc6c31a0c6354eb57cc6affected
LinuxLinux609e28bb139e53621521130f0d4aea27a725d465 < a43e0fc5e9134a46515de2f2f8d4100b74e50de3affected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.83 <= 6.1.*unaffected
LinuxLinux6.6.23 <= 6.6.*unaffected
LinuxLinux6.7.11 <= 6.7.*unaffected
LinuxLinux6.8.2 <= 6.8.*unaffected
LinuxLinux6.9 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References