Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected df133f3f96257ee29696c0ed8bd198ec801dc810 before d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa; affected df133f3f96257ee29696c0ed8bd198ec801dc810 before 842a97b5e44f0c8a9fc356fe976e0e13ddcf7783; affected df133f3f96257ee29696c0ed8bd198ec801dc810 before cc7340f18e45886121c131227985d64ef666012f; affected df133f3f96257ee29696c0ed8bd198ec801dc810 before 6b5325f2457521bbece29499970c0117a648c620; affected df133f3f96257ee29696c0ed8bd198ec801dc810 before f5e9a22d19bb98a7e86034db85eb295e94187caa; affected df133f3f96257ee29696c0ed8bd198ec801dc810 before 468a729b78895893d0e580ceea49bed8ada2a2bd; affected df133f3f96257ee29696c0ed8bd198ec801dc810 before f8321fa75102246d7415a6af441872f6637c93ab |
| Linux / Linux | affected 5.0; unaffected 0 before 5.0; unaffected 5.4.284 through 5.4.*; unaffected 5.10.226 through 5.10.*; unaffected 5.15.167 through 5.15.*; unaffected 6.1.109 through 6.1.*; unaffected 6.6.50 through 6.6.*; unaffected 6.10.3 through 6.10.*; unaffected 6.11 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa
- https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783
- https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f
- https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620
- https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa
- https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd
- https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.