CVE-2024-42315 (GCVE-0-2024-42315)

Vulnerability from cvelistv5 – Published: 2024-08-17 09:09 – Updated: 2025-11-03 20:38
VLAI?
Title
exfat: fix potential deadlock on __exfat_get_dentry_set
Summary
In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential deadlock on __exfat_get_dentry_set When accessing a file with more entries than ES_MAX_ENTRY_NUM, the bh-array is allocated in __exfat_get_entry_set. The problem is that the bh-array is allocated with GFP_KERNEL. It does not make sense. In the following cases, a deadlock for sbi->s_lock between the two processes may occur. CPU0 CPU1 ---- ---- kswapd balance_pgdat lock(fs_reclaim) exfat_iterate lock(&sbi->s_lock) exfat_readdir exfat_get_uniname_from_ext_entry exfat_get_dentry_set __exfat_get_dentry_set kmalloc_array ... lock(fs_reclaim) ... evict exfat_evict_inode lock(&sbi->s_lock) To fix this, let's allocate bh-array with GFP_NOFS.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: bd3bdb9e0d656f760b11d0c638d35d7f7068144d , < 632fb232b6bbf8277edcbe9ecd4b4d98ecb122eb (git)
Affected: 92dcd7d6c6068bf4fd35a6f64d606e27d634807e , < c052f775ee6ccacd3c97e4cf41a2a657e63d4259 (git)
Affected: d8fe01ad2d8ab33aaf8f2efad9e8f1dae11c4b0c , < cd1c7858641384191ff7033fb1fc65dfcd559c6f (git)
Affected: a3ff29a95fde16906304455aa8c0bd84eb770258 , < a7ac198f8dba791e3144c4da48a5a9b95773ee4b (git)
Affected: a3ff29a95fde16906304455aa8c0bd84eb770258 , < 1d1970493c289e3f44b9ec847ed26a5dbdf56a62 (git)
Affected: a3ff29a95fde16906304455aa8c0bd84eb770258 , < 89fc548767a2155231128cb98726d6d2ea1256c9 (git)
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    Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 5.10.232 , ≤ 5.10.* (semver)
Unaffected: 5.15.175 , ≤ 5.15.* (semver)
Unaffected: 6.6.44 , ≤ 6.6.* (semver)
Unaffected: 6.10.3 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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