CVE-2024-42315

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.

The following products are affected by CVE-2024-42315 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2024-42315.

URL	Resource
https://git.kernel.org/stable/c/1d1970493c289e3f44b9ec847ed26a5dbdf56a62
https://git.kernel.org/stable/c/632fb232b6bbf8277edcbe9ecd4b4d98ecb122eb
https://git.kernel.org/stable/c/89fc548767a2155231128cb98726d6d2ea1256c9
https://git.kernel.org/stable/c/a7ac198f8dba791e3144c4da48a5a9b95773ee4b
https://git.kernel.org/stable/c/c052f775ee6ccacd3c97e4cf41a2a657e63d4259
https://git.kernel.org/stable/c/cd1c7858641384191ff7033fb1fc65dfcd559c6f
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
https://lore.kernel.org/linux-cve-announce/2024081753-CVE-2024-42315-a707@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2024-42315
https://www.cve.org/CVERecord?id=CVE-2024-42315