[ Upstream commit f8bbc07ac535593139c875ffa19af924b1084540 ] vhost_worker will call tun call backs to receive packets. If too many illegal packets arrives, tun_do_read will keep dumping packet contents. When console is enabled, it will costs much more cpu time to dump packet and soft lockup will be detected. net_ratelimit mechanism can be used to limit the dumping rate. PID: 33036 TASK: ffff949da6f20000 CPU: 23 COMMAND: "vhost-32980" #0 [fffffe00003fce50] crash_nmi_callback at ffffffff89249253 kutemeikito#1 [fffffe00003fce58] nmi_handle at ffffffff89225fa3 kutemeikito#2 [fffffe00003fceb0] default_do_nmi at ffffffff8922642e kutemeikito#3 [fffffe00003fced0] do_nmi at ffffffff8922660d kutemeikito#4 [fffffe00003fcef0] end_repeat_nmi at ffffffff89c01663 [exception RIP: io_serial_in+20] RIP: ffffffff89792594 RSP: ffffa655314979e8 RFLAGS: 00000002 RAX: ffffffff89792500 RBX: ffffffff8af428a0 RCX: 0000000000000000 RDX: 00000000000003fd RSI: 0000000000000005 RDI: ffffffff8af428a0 RBP: 0000000000002710 R8: 0000000000000004 R9: 000000000000000f R10: 0000000000000000 R11: ffffffff8acbf64f R12: 0000000000000020 R13: ffffffff8acbf698 R14: 0000000000000058 R15: 0000000000000000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 kutemeikito#5 [ffffa655314979e8] io_serial_in at ffffffff89792594 kutemeikito#6 [ffffa655314979e8] wait_for_xmitr at ffffffff89793470 kutemeikito#7 [ffffa65531497a08] serial8250_console_putchar at ffffffff897934f6 kutemeikito#8 [ffffa65531497a20] uart_console_write at ffffffff8978b605 kutemeikito#9 [ffffa65531497a48] serial8250_console_write at ffffffff89796558 kutemeikito#10 [ffffa65531497ac8] console_unlock at ffffffff89316124 kutemeikito#11 [ffffa65531497b10] vprintk_emit at ffffffff89317c07 kutemeikito#12 [ffffa65531497b68] printk at ffffffff89318306 kutemeikito#13 [ffffa65531497bc8] print_hex_dump at ffffffff89650765 kutemeikito#14 [ffffa65531497ca8] tun_do_read at ffffffffc0b06c27 [tun] kutemeikito#15 [ffffa65531497d38] tun_recvmsg at ffffffffc0b06e34 [tun] kutemeikito#16 [ffffa65531497d68] handle_rx at ffffffffc0c5d682 [vhost_net] kutemeikito#17 [ffffa65531497ed0] vhost_worker at ffffffffc0c644dc [vhost] kutemeikito#18 [ffffa65531497f10] kthread at ffffffff892d2e72 kutemeikito#19 [ffffa65531497f50] ret_from_fork at ffffffff89c0022f Fixes: ef3db4a ("tun: avoid BUG, dump packet on GSO errors") Signed-off-by: Lei Chen <lei.chen@smartx.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Acked-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Link: https://lore.kernel.org/r/20240415020247.2207781-1-lei.chen@smartx.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> (cherry picked from commit 68459b8e3ee554ce71878af9eb69659b9462c588) Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>

Error: defconf #18

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