cve-2024-42315
Vulnerability from cvelistv5
Published
2024-08-17 09:09
Modified
2024-12-19 18:32
Severity ?
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d1970493c289e3f44b9ec847ed26a5dbdf56a62Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/632fb232b6bbf8277edcbe9ecd4b4d98ecb122eb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89fc548767a2155231128cb98726d6d2ea1256c9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a7ac198f8dba791e3144c4da48a5a9b95773ee4bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c052f775ee6ccacd3c97e4cf41a2a657e63d4259
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cd1c7858641384191ff7033fb1fc65dfcd559c6f
Impacted products
Vendor Product Version
Linux Linux Version: bd3bdb9e0d656f760b11d0c638d35d7f7068144d
Version: 92dcd7d6c6068bf4fd35a6f64d606e27d634807e
Version: d8fe01ad2d8ab33aaf8f2efad9e8f1dae11c4b0c
Version: a3ff29a95fde16906304455aa8c0bd84eb770258
Version: a3ff29a95fde16906304455aa8c0bd84eb770258
Version: a3ff29a95fde16906304455aa8c0bd84eb770258
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   Linux Linux Version: 6.2
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}


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