CVE-2021-47619

i40e: Fix queues reservation for XDP

State: Published
Severity: Not scored
Published: Jun 20, 2024
Updated: May 11, 2026
Reserved: Jun 20, 2024

Description

In the Linux kernel, the following vulnerability has been resolved:

i40e: Fix queues reservation for XDP

When XDP was configured on a system with large number of CPUs and X722 NIC there was a call trace with NULL pointer dereference.

i40e 0000:87:00.0: failed to get tracking for 256 queues for VSI 0 err -12 i40e 0000:87:00.0: setup of MAIN VSI failed

BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:i40e_xdp+0xea/0x1b0 [i40e] Call Trace: ? i40e_reconfig_rss_queues+0x130/0x130 [i40e] dev_xdp_install+0x61/0xe0 dev_xdp_attach+0x18a/0x4c0 dev_change_xdp_fd+0x1e6/0x220 do_setlink+0x616/0x1030 ? ahci_port_stop+0x80/0x80 ? ata_qc_issue+0x107/0x1e0 ? lock_timer_base+0x61/0x80 ? __mod_timer+0x202/0x380 rtnl_setlink+0xe5/0x170 ? bpf_lsm_binder_transaction+0x10/0x10 ? security_capable+0x36/0x50 rtnetlink_rcv_msg+0x121/0x350 ? rtnl_calcit.isra.0+0x100/0x100 netlink_rcv_skb+0x50/0xf0 netlink_unicast+0x1d3/0x2a0 netlink_sendmsg+0x22a/0x440 sock_sendmsg+0x5e/0x60 __sys_sendto+0xf0/0x160 ? __sys_getsockname+0x7e/0xc0 ? _copy_from_user+0x3c/0x80 ? __sys_setsockopt+0xc8/0x1a0 __x64_sys_sendto+0x20/0x30 do_syscall_64+0x33/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f83fa7a39e0

This was caused by PF queue pile fragmentation due to flow director VSI queue being placed right after main VSI. Because of this main VSI was not able to resize its queue allocation for XDP resulting in no queues allocated for main VSI when XDP was turned on.

Fix this by always allocating last queue in PF queue pile for a flow director VSI.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	41c445ff0f482bb6e6b72dcee9e598e20575f743 to before d46fa4ea9756ef6cbcf9752d0832cc66e2d7121bAffected 41c445ff0f482bb6e6b72dcee9e598e20575f743 to before be6998f232b8e4ca8225029e305b8329d89bfd59Affected 41c445ff0f482bb6e6b72dcee9e598e20575f743 to before 768eb705e6381f0c70ca29d4e66f19790d5d19a1Affected 41c445ff0f482bb6e6b72dcee9e598e20575f743 to before 00eddb0e4ea115154581d1049507a996acfc2d3eAffected 41c445ff0f482bb6e6b72dcee9e598e20575f743 to before 4b3aa858268b7b9aeef02e5f9c4cd8f8fac101c8Affected 41c445ff0f482bb6e6b72dcee9e598e20575f743 to before 92947844b8beee988c0ce17082b705c2f75f0742Affected
LinuxLinux	3.12Affected before 3.12Not affected 4.19.228 through 4.19.Not affected 5.4.176 through 5.4.Not affected 5.10.96 through 5.10.Not affected 5.15.19 through 5.15.Not affected 5.16.5 through 5.16.*Not affected 5.17 and laterNot affected

Product

Versions

LinuxLinux

41c445ff0f482bb6e6b72dcee9e598e20575f743 to before d46fa4ea9756ef6cbcf9752d0832cc66e2d7121bAffected
41c445ff0f482bb6e6b72dcee9e598e20575f743 to before be6998f232b8e4ca8225029e305b8329d89bfd59Affected
41c445ff0f482bb6e6b72dcee9e598e20575f743 to before 768eb705e6381f0c70ca29d4e66f19790d5d19a1Affected
41c445ff0f482bb6e6b72dcee9e598e20575f743 to before 00eddb0e4ea115154581d1049507a996acfc2d3eAffected
41c445ff0f482bb6e6b72dcee9e598e20575f743 to before 4b3aa858268b7b9aeef02e5f9c4cd8f8fac101c8Affected
41c445ff0f482bb6e6b72dcee9e598e20575f743 to before 92947844b8beee988c0ce17082b705c2f75f0742Affected

LinuxLinux

3.12Affected
before 3.12Not affected
4.19.228 through 4.19.*Not affected
5.4.176 through 5.4.*Not affected
5.10.96 through 5.10.*Not affected
5.15.19 through 5.15.*Not affected
5.16.5 through 5.16.*Not affected
5.17 and laterNot affected

References

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