Bugzilla – Bug 1228055
VUL-0: CVE-2022-48829: kernel: NFSD: Fix NFSv3 SETATTR/CREATE's handling of large file sizes
Last modified: 2024-07-17 12:17:27 UTC
In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix NFSv3 SETATTR/CREATE's handling of large file sizes iattr::ia_size is a loff_t, so these NFSv3 procedures must be careful to deal with incoming client size values that are larger than s64_max without corrupting the value. Silently capping the value results in storing a different value than the client passed in which is unexpected behavior, so remove the min_t() check in decode_sattr3(). Note that RFC 1813 permits only the WRITE procedure to return NFS3ERR_FBIG. We believe that NFSv3 reference implementations also return NFS3ERR_FBIG when ia_size is too large. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-48829 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-48829.mbox https://git.kernel.org/stable/c/a231ae6bb50e7c0a9e9efd7b0d10687f1d71b3a3 https://git.kernel.org/stable/c/37f2d2cd8eadddbbd9c7bda327a9393399b2f89b https://git.kernel.org/stable/c/aa9051ddb4b378bd22e72a67bc77b9fc1482c5f0 https://git.kernel.org/stable/c/a648fdeb7c0e17177a2280344d015dba3fbe3314 https://www.cve.org/CVERecord?id=CVE-2022-48829 https://bugzilla.redhat.com/show_bug.cgi?id=2298168