Bugzilla – Bug 1224522
VUL-0: CVE-2024-35882: kernel: SUNRPC: Fix a slow server-side memory leak with RPC-over-TCP
Last modified: 2024-06-10 12:08:01 UTC
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix a slow server-side memory leak with RPC-over-TCP Jan Schunk reports that his small NFS servers suffer from memory exhaustion after just a few days. A bisect shows that commit e18e157bb5c8 ("SUNRPC: Send RPC message on TCP with a single sock_sendmsg() call") is the first bad commit. That commit assumed that sock_sendmsg() releases all the pages in the underlying bio_vec array, but the reality is that it doesn't. svc_xprt_release() releases the rqst's response pages, but the record marker page fragment isn't one of those, so it is never released. This is a narrow fix that can be applied to stable kernels. A more extensive fix is in the works. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-35882 https://www.cve.org/CVERecord?id=CVE-2024-35882 https://git.kernel.org/stable/c/05258a0a69b3c5d2c003f818702c0a52b6fea861 https://git.kernel.org/stable/c/1ba1291172f935e6b6fe703161a948f3347400b8 https://git.kernel.org/stable/c/a2ebedf7bcd17a1194a0a18122c885eb578ee882 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-35882.mbox
joeyli@linux-691t:/mnt/working/source_code-git/kernel-source> ./scripts/check-kernel-fix -s 0 CVE-2024-35882 05258a0a69b3 ("SUNRPC: Fix a slow server-side memory leak with RPC-over-TCP") merged v6.9-rc3~4^2~1 Fixes: e18e157bb5c8 ("SUNRPC: Send RPC message on TCP with a single sock_sendmsg() call") merged v6.6-rc1~108^2~27 Security fix for CVE-2024-35882 bsc#1224522 with CVSS 0 Experts candidates: neilb@suse.com .............................. NO ACTION NEEDED: All relevant branches contain the fix! Does not affect any branch. Reset assignee
All done, closing.