res.data_size) so it can't overflow on a 64bit systems but on 32bit systems the "+ 1023" can overflow and the result is zero. This means that the kmalloc will succeed by returning the ZERO_SIZE_PTR and then the memcpy() will crash with an Oops on the next line. "> res.data_size),so,it,can't,overflow,on,a,64bit systems,but,on,32bit,systems,the,"+,1023",can,overflow,and,the,result is,zero.,This,means,that,the,kmalloc,will,succeed,by,returning,the ZERO_SIZE_PTR,and,then,the,memcpy(),will,crash,with,an,Oops,on,the next,line. "> SecuritySpace - CVE-2023-52631
 
 
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CVE ID:CVE-2023-52631
Description:In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fix an NULL dereference bug The issue here is when this is called from ntfs_load_attr_list(). The "size" comes from le32_to_cpu(attr->res.data_size) so it can't overflow on a 64bit systems but on 32bit systems the "+ 1023" can overflow and the result is zero. This means that the kmalloc will succeed by returning the ZERO_SIZE_PTR and then the memcpy() will crash with an Oops on the next line.
Test IDs: None available
Cross References: Common Vulnerability Exposure (CVE) ID: CVE-2023-52631
https://git.kernel.org/stable/c/686820fe141ea0220fc6fdfc7e5694f915cf64b2
https://git.kernel.org/stable/c/686820fe141ea0220fc6fdfc7e5694f915cf64b2
https://git.kernel.org/stable/c/ae4acad41b0f93f1c26cc0fc9135bb79d8282d0b
https://git.kernel.org/stable/c/ae4acad41b0f93f1c26cc0fc9135bb79d8282d0b
https://git.kernel.org/stable/c/b2dd7b953c25ffd5912dda17e980e7168bebcf6c
https://git.kernel.org/stable/c/b2dd7b953c25ffd5912dda17e980e7168bebcf6c
https://git.kernel.org/stable/c/ec1bedd797588fe38fc11cba26d77bb1d9b194c6
https://git.kernel.org/stable/c/ec1bedd797588fe38fc11cba26d77bb1d9b194c6
https://git.kernel.org/stable/c/fb7bcd1722bc9bc55160378f5f99c01198fd14a7
https://git.kernel.org/stable/c/fb7bcd1722bc9bc55160378f5f99c01198fd14a7




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