CVE-2023-54236

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net/net_failover: fix txq exceeding warning<br /> <br /> The failover txq is inited as 16 queues.<br /> when a packet is transmitted from the failover device firstly,<br /> the failover device will select the queue which is returned from<br /> the primary device if the primary device is UP and running.<br /> If the primary device txq is bigger than the default 16,<br /> it can lead to the following warning:<br /> eth0 selects TX queue 18, but real number of TX queues is 16<br /> <br /> The warning backtrace is:<br /> [ 32.146376] CPU: 18 PID: 9134 Comm: chronyd Tainted: G E 6.2.8-1.el7.centos.x86_64 #1<br /> [ 32.147175] Hardware name: Red Hat KVM, BIOS 1.10.2-3.el7_4.1 04/01/2014<br /> [ 32.147730] Call Trace:<br /> [ 32.147971] <br /> [ 32.148183] dump_stack_lvl+0x48/0x70<br /> [ 32.148514] dump_stack+0x10/0x20<br /> [ 32.148820] netdev_core_pick_tx+0xb1/0xe0<br /> [ 32.149180] __dev_queue_xmit+0x529/0xcf0<br /> [ 32.149533] ? __check_object_size.part.0+0x21c/0x2c0<br /> [ 32.149967] ip_finish_output2+0x278/0x560<br /> [ 32.150327] __ip_finish_output+0x1fe/0x2f0<br /> [ 32.150690] ip_finish_output+0x2a/0xd0<br /> [ 32.151032] ip_output+0x7a/0x110<br /> [ 32.151337] ? __pfx_ip_finish_output+0x10/0x10<br /> [ 32.151733] ip_local_out+0x5e/0x70<br /> [ 32.152054] ip_send_skb+0x19/0x50<br /> [ 32.152366] udp_send_skb.isra.0+0x163/0x3a0<br /> [ 32.152736] udp_sendmsg+0xba8/0xec0<br /> [ 32.153060] ? __folio_memcg_unlock+0x25/0x60<br /> [ 32.153445] ? __pfx_ip_generic_getfrag+0x10/0x10<br /> [ 32.153854] ? sock_has_perm+0x85/0xa0<br /> [ 32.154190] inet_sendmsg+0x6d/0x80<br /> [ 32.154508] ? inet_sendmsg+0x6d/0x80<br /> [ 32.154838] sock_sendmsg+0x62/0x70<br /> [ 32.155152] ____sys_sendmsg+0x134/0x290<br /> [ 32.155499] ___sys_sendmsg+0x81/0xc0<br /> [ 32.155828] ? _get_random_bytes.part.0+0x79/0x1a0<br /> [ 32.156240] ? ip4_datagram_release_cb+0x5f/0x1e0<br /> [ 32.156649] ? get_random_u16+0x69/0xf0<br /> [ 32.156989] ? __fget_light+0xcf/0x110<br /> [ 32.157326] __sys_sendmmsg+0xc4/0x210<br /> [ 32.157657] ? __sys_connect+0xb7/0xe0<br /> [ 32.157995] ? __audit_syscall_entry+0xce/0x140<br /> [ 32.158388] ? syscall_trace_enter.isra.0+0x12c/0x1a0<br /> [ 32.158820] __x64_sys_sendmmsg+0x24/0x30<br /> [ 32.159171] do_syscall_64+0x38/0x90<br /> [ 32.159493] entry_SYSCALL_64_after_hwframe+0x72/0xdc<br /> <br /> Fix that by reducing txq number as the non-existent primary-dev does.