CVE-2024-42315

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Source
https://nvd.nist.gov/vuln/detail/CVE-2024-42315
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-42315.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-42315
Downstream
Related
Published
2024-08-17T09:15:11Z
Modified
2025-08-09T20:01:27Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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

exfat: fix potential deadlock on _exfatgetdentryset

When accessing a file with more entries than ESMAXENTRYNUM, the bh-array is allocated in _exfatgetentryset. The problem is that the bh-array is allocated with GFPKERNEL. It does not make sense. In the following cases, a deadlock for sbi->s_lock between the two processes may occur.

   CPU0                CPU1
   ----                ----

kswapd balancepgdat lock(fsreclaim) exfatiterate lock(&sbi->slock) exfatreaddir exfatgetuninamefromextentry exfatgetdentryset _exfatgetdentryset kmallocarray ... lock(fsreclaim) ... evict exfatevictinode lock(&sbi->slock)

To fix this, let's allocate bh-array with GFP_NOFS.

References

Affected packages