CVE - CVE-2024-42315

CVE-ID
CVE-2024-42315	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1d1970493c289e3f44b9ec847ed26a5dbdf56a62 URL:https://git.kernel.org/stable/c/1d1970493c289e3f44b9ec847ed26a5dbdf56a62 MISC:https://git.kernel.org/stable/c/89fc548767a2155231128cb98726d6d2ea1256c9 URL:https://git.kernel.org/stable/c/89fc548767a2155231128cb98726d6d2ea1256c9 MISC:https://git.kernel.org/stable/c/a7ac198f8dba791e3144c4da48a5a9b95773ee4b URL:https://git.kernel.org/stable/c/a7ac198f8dba791e3144c4da48a5a9b95773ee4b
Assigning CNA
kernel.org
Date Record Created
20240730	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240730)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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