CVE - CVE-2024-43835

CVE-ID
CVE-2024-43835	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: virtio_net: Fix napi_skb_cache_put warning After the commit bdacf3e34945 ("net: Use nested-BH locking for napi_alloc_cache.") was merged, the following warning began to appear: WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0 __warn+0x12f/0x340 napi_skb_cache_put+0x82/0x4b0 napi_skb_cache_put+0x82/0x4b0 report_bug+0x165/0x370 handle_bug+0x3d/0x80 exc_invalid_op+0x1a/0x50 asm_exc_invalid_op+0x1a/0x20 __free_old_xmit+0x1c8/0x510 napi_skb_cache_put+0x82/0x4b0 __free_old_xmit+0x1c8/0x510 __free_old_xmit+0x1c8/0x510 __pfx___free_old_xmit+0x10/0x10 The issue arises because virtio is assuming it's running in NAPI context even when it's not, such as in the netpoll case. To resolve this, modify virtnet_poll_tx() to only set NAPI when budget is available. Same for virtnet_poll_cleantx(), which always assumed that it was in a NAPI context.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/19ac6f29bf64304ef04630c8ab56ecd2059d7aa1 URL:https://git.kernel.org/stable/c/19ac6f29bf64304ef04630c8ab56ecd2059d7aa1 MISC:https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd URL:https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd MISC:https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620 URL:https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620 MISC:https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783 URL:https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783 MISC:https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f URL:https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f MISC:https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa URL:https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa MISC:https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa URL:https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa MISC:https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab URL:https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab
Assigning CNA
kernel.org
Date Record Created
20240817	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240817)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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