CVE-2021-47619

i40e: Fix queues reservation for XDP

MEDIUM

5.5

CVSS Score

Published: June 20, 2024 at 11:08 AM UTC

Updated: June 17, 2026 at 04:18 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

3.12 ≤ v < 4.19.2283.12 ≤ v < 5.10.963.12 ≤ v < 5.15.193.12 ≤ v < 5.16.53.12 ≤ v < 5.173.12 ≤ v < 5.4.1764.20 ≤ v < 5.4.1765.11 ≤ v < 5.15.195.16 ≤ v < 5.16.55.5 ≤ v < 5.10.9641c445ff0f482bb6e6b72dcee9e598e20575f7435.17 rc1

Vendor states this is fixed in 00eddb0e4ea115154581d1049507a996acfc2d3e (fixed)

Vendor states this is fixed in 4b3aa858268b7b9aeef02e5f9c4cd8f8fac101c8 (fixed)

Vendor states this is fixed in 768eb705e6381f0c70ca29d4e66f19790d5d19a1 (fixed)

Vendor states this is fixed in 92947844b8beee988c0ce17082b705c2f75f0742 (fixed)

Vendor states this is fixed in be6998f232b8e4ca8225029e305b8329d89bfd59 (fixed)

Vendor states this is fixed in d46fa4ea9756ef6cbcf9752d0832cc66e2d7121b (fixed)

Vendor states this is fixed in 3.12 (unaffected)

Vendor states this is fixed in 4.19.228 (unaffected)

Vendor states this is fixed in 5.10.96 (unaffected)

Vendor states this is fixed in 5.15.19 (unaffected)

Vendor states this is fixed in 5.16.5 (unaffected)

Vendor states this is fixed in 5.17 (unaffected)