CVE-2024-35882: SUNRPC: Fix a slow server-side memory leak with RPC-over-TCP
First published: Sun May 19 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.106-3 6.1.112-1 6.10.11-1 6.11.2-1 |
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Reference Links
- https://git.kernel.org/stable/c/05258a0a69b3c5d2c003f818702c0a52b6fea861
- https://git.kernel.org/stable/c/1ba1291172f935e6b6fe703161a948f3347400b8
- https://git.kernel.org/stable/c/a2ebedf7bcd17a1194a0a18122c885eb578ee882
- https://launchpad.net/bugs/cve/CVE-2024-35882
- https://git.kernel.org/linus/05258a0a69b3c5d2c003f818702c0a52b6fea861
- https://security-tracker.debian.org/tracker/CVE-2024-35882
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-35882
- https://nvd.nist.gov/vuln/detail/CVE-2024-35882
- https://ubuntu.com/security/CVE-2024-35882
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