cve-2022-48819
Vulnerability from cvelistv5
Published
2024-07-16 11:44
Modified
2024-11-04 12:17
Severity ?
Summary
tcp: take care of mixed splice()/sendmsg(MSG_ZEROCOPY) case
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/47f3860c4931175f112f28dcac66eacca9b1040f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8d9d938514f46c4892aff6bfe32f425e84d81cc
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/47f3860c4931175f112f28dcac66eacca9b1040f
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f8d9d938514f46c4892aff6bfe32f425e84d81cc
Impacted products
Vendor Product Version
Linux Linux Version: 5.16
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: take care of mixed splice()/sendmsg(MSG_ZEROCOPY) case\n\nsyzbot found that mixing sendpage() and sendmsg(MSG_ZEROCOPY)\ncalls over the same TCP socket would again trigger the\ninfamous warning in inet_sock_destruct()\n\n\tWARN_ON(sk_forward_alloc_get(sk));\n\nWhile Talal took into account a mix of regular copied data\nand MSG_ZEROCOPY one in the same skb, the sendpage() path\nhas been forgotten.\n\nWe want the charging to happen for sendpage(), because\npages could be coming from a pipe. What is missing is the\ndowngrading of pure zerocopy status to make sure\nsk_forward_alloc will stay synced.\n\nAdd tcp_downgrade_zcopy_pure() helper so that we can\nuse it from the two callers."
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