https://github.com/torvalds/linux
Revision f8bbc07ac535593139c875ffa19af924b1084540 authored by Lei Chen on 15 April 2024, 02:02:46 UTC, committed by Jakub Kicinski on 17 April 2024, 00:13:23 UTC
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
#1 [fffffe00003fce58] nmi_handle at ffffffff89225fa3
#2 [fffffe00003fceb0] default_do_nmi at ffffffff8922642e
#3 [fffffe00003fced0] do_nmi at ffffffff8922660d
#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
#5 [ffffa655314979e8] io_serial_in at ffffffff89792594
#6 [ffffa655314979e8] wait_for_xmitr at ffffffff89793470
#7 [ffffa65531497a08] serial8250_console_putchar at ffffffff897934f6
#8 [ffffa65531497a20] uart_console_write at ffffffff8978b605
#9 [ffffa65531497a48] serial8250_console_write at ffffffff89796558
#10 [ffffa65531497ac8] console_unlock at ffffffff89316124
#11 [ffffa65531497b10] vprintk_emit at ffffffff89317c07
#12 [ffffa65531497b68] printk at ffffffff89318306
#13 [ffffa65531497bc8] print_hex_dump at ffffffff89650765
#14 [ffffa65531497ca8] tun_do_read at ffffffffc0b06c27 [tun]
#15 [ffffa65531497d38] tun_recvmsg at ffffffffc0b06e34 [tun]
#16 [ffffa65531497d68] handle_rx at ffffffffc0c5d682 [vhost_net]
#17 [ffffa65531497ed0] vhost_worker at ffffffffc0c644dc [vhost]
#18 [ffffa65531497f10] kthread at ffffffff892d2e72
#19 [ffffa65531497f50] ret_from_fork at ffffffff89c0022f
Fixes: ef3db4a59542 ("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>
1 parent e226ead
Tip revision: f8bbc07ac535593139c875ffa19af924b1084540 authored by Lei Chen on 15 April 2024, 02:02:46 UTC
tun: limit printing rate when illegal packet received by tun dev
tun: limit printing rate when illegal packet received by tun dev
Tip revision: f8bbc07
| File | Mode | Size |
|---|---|---|
| damon | ||
| kasan | ||
| kfence | ||
| kmsan | ||
| Kconfig | -rw-r--r-- | 38.6 KB |
| Kconfig.debug | -rw-r--r-- | 9.9 KB |
| Makefile | -rw-r--r-- | 4.9 KB |
| backing-dev.c | -rw-r--r-- | 26.6 KB |
| balloon_compaction.c | -rw-r--r-- | 8.2 KB |
| bootmem_info.c | -rw-r--r-- | 3.4 KB |
| cma.c | -rw-r--r-- | 15.6 KB |
| cma.h | -rw-r--r-- | 1.6 KB |
| cma_debug.c | -rw-r--r-- | 4.5 KB |
| cma_sysfs.c | -rw-r--r-- | 2.9 KB |
| compaction.c | -rw-r--r-- | 92.7 KB |
| debug.c | -rw-r--r-- | 7.3 KB |
| debug_page_alloc.c | -rw-r--r-- | 1.6 KB |
| debug_page_ref.c | -rw-r--r-- | 1.4 KB |
| debug_vm_pgtable.c | -rw-r--r-- | 40.4 KB |
| dmapool.c | -rw-r--r-- | 13.1 KB |
| dmapool_test.c | -rw-r--r-- | 2.9 KB |
| early_ioremap.c | -rw-r--r-- | 6.7 KB |
| fadvise.c | -rw-r--r-- | 5.5 KB |
| fail_page_alloc.c | -rw-r--r-- | 1.6 KB |
| failslab.c | -rw-r--r-- | 1.6 KB |
| filemap.c | -rw-r--r-- | 121.7 KB |
| folio-compat.c | -rw-r--r-- | 2.8 KB |
| gup.c | -rw-r--r-- | 96.5 KB |
| gup_test.c | -rw-r--r-- | 9.0 KB |
| gup_test.h | -rw-r--r-- | 1.2 KB |
| highmem.c | -rw-r--r-- | 20.2 KB |
| hmm.c | -rw-r--r-- | 17.1 KB |
| huge_memory.c | -rw-r--r-- | 100.7 KB |
| hugetlb.c | -rw-r--r-- | 218.7 KB |
| hugetlb_cgroup.c | -rw-r--r-- | 24.2 KB |
| hugetlb_vmemmap.c | -rw-r--r-- | 20.7 KB |
| hugetlb_vmemmap.h | -rw-r--r-- | 2.3 KB |
| hwpoison-inject.c | -rw-r--r-- | 2.8 KB |
| init-mm.c | -rw-r--r-- | 1.7 KB |
| internal.h | -rw-r--r-- | 42.0 KB |
| interval_tree.c | -rw-r--r-- | 3.1 KB |
| io-mapping.c | -rw-r--r-- | 993 bytes |
| ioremap.c | -rw-r--r-- | 1.7 KB |
| khugepaged.c | -rw-r--r-- | 71.8 KB |
| kmemleak.c | -rw-r--r-- | 62.8 KB |
| ksm.c | -rw-r--r-- | 107.9 KB |
| list_lru.c | -rw-r--r-- | 13.8 KB |
| maccess.c | -rw-r--r-- | 5.9 KB |
| madvise.c | -rw-r--r-- | 38.7 KB |
| mapping_dirty_helpers.c | -rw-r--r-- | 10.4 KB |
| memblock.c | -rw-r--r-- | 64.9 KB |
| memcontrol.c | -rw-r--r-- | 215.4 KB |
| memfd.c | -rw-r--r-- | 9.3 KB |
| memory-failure.c | -rw-r--r-- | 73.6 KB |
| memory-tiers.c | -rw-r--r-- | 24.2 KB |
| memory.c | -rw-r--r-- | 175.6 KB |
| memory_hotplug.c | -rw-r--r-- | 68.1 KB |
| mempolicy.c | -rw-r--r-- | 89.2 KB |
| mempool.c | -rw-r--r-- | 17.6 KB |
| memremap.c | -rw-r--r-- | 14.4 KB |
| memtest.c | -rw-r--r-- | 3.5 KB |
| migrate.c | -rw-r--r-- | 69.5 KB |
| migrate_device.c | -rw-r--r-- | 27.0 KB |
| mincore.c | -rw-r--r-- | 7.1 KB |
| mlock.c | -rw-r--r-- | 20.7 KB |
| mm_init.c | -rw-r--r-- | 78.4 KB |
| mm_slot.h | -rw-r--r-- | 1.4 KB |
| mmap.c | -rw-r--r-- | 105.3 KB |
| mmap_lock.c | -rw-r--r-- | 6.2 KB |
| mmu_gather.c | -rw-r--r-- | 12.3 KB |
| mmu_notifier.c | -rw-r--r-- | 34.5 KB |
| mmzone.c | -rw-r--r-- | 2.6 KB |
| mprotect.c | -rw-r--r-- | 22.4 KB |
| mremap.c | -rw-r--r-- | 31.1 KB |
| msync.c | -rw-r--r-- | 2.9 KB |
| nommu.c | -rw-r--r-- | 44.3 KB |
| oom_kill.c | -rw-r--r-- | 33.4 KB |
| page-writeback.c | -rw-r--r-- | 94.6 KB |
| page_alloc.c | -rw-r--r-- | 192.2 KB |
| page_counter.c | -rw-r--r-- | 6.8 KB |
| page_ext.c | -rw-r--r-- | 13.6 KB |
| page_idle.c | -rw-r--r-- | 5.3 KB |
| page_io.c | -rw-r--r-- | 13.7 KB |
| page_isolation.c | -rw-r--r-- | 21.5 KB |
| page_owner.c | -rw-r--r-- | 23.7 KB |
| page_poison.c | -rw-r--r-- | 2.5 KB |
| page_reporting.c | -rw-r--r-- | 11.7 KB |
| page_reporting.h | -rw-r--r-- | 1.6 KB |
| page_table_check.c | -rw-r--r-- | 5.8 KB |
| page_vma_mapped.c | -rw-r--r-- | 9.2 KB |
| pagewalk.c | -rw-r--r-- | 18.7 KB |
| percpu-internal.h | -rw-r--r-- | 7.3 KB |
| percpu-km.c | -rw-r--r-- | 3.2 KB |
| percpu-stats.c | -rw-r--r-- | 5.8 KB |
| percpu-vm.c | -rw-r--r-- | 11.7 KB |
| percpu.c | -rw-r--r-- | 102.6 KB |
| pgalloc-track.h | -rw-r--r-- | 1.3 KB |
| pgtable-generic.c | -rw-r--r-- | 11.1 KB |
| process_vm_access.c | -rw-r--r-- | 8.3 KB |
| ptdump.c | -rw-r--r-- | 4.6 KB |
| readahead.c | -rw-r--r-- | 25.4 KB |
| rmap.c | -rw-r--r-- | 78.6 KB |
| rodata_test.c | -rw-r--r-- | 1.2 KB |
| secretmem.c | -rw-r--r-- | 6.4 KB |
| shmem.c | -rw-r--r-- | 130.7 KB |
| shmem_quota.c | -rw-r--r-- | 9.5 KB |
| show_mem.c | -rw-r--r-- | 11.8 KB |
| shrinker.c | -rw-r--r-- | 21.3 KB |
| shrinker_debug.c | -rw-r--r-- | 6.1 KB |
| shuffle.c | -rw-r--r-- | 4.6 KB |
| shuffle.h | -rw-r--r-- | 1.2 KB |
| slab.h | -rw-r--r-- | 18.3 KB |
| slab_common.c | -rw-r--r-- | 33.7 KB |
| slub.c | -rw-r--r-- | 177.2 KB |
| sparse-vmemmap.c | -rw-r--r-- | 11.9 KB |
| sparse.c | -rw-r--r-- | 25.6 KB |
| swap.c | -rw-r--r-- | 31.8 KB |
| swap.h | -rw-r--r-- | 4.1 KB |
| swap_cgroup.c | -rw-r--r-- | 5.2 KB |
| swap_slots.c | -rw-r--r-- | 9.3 KB |
| swap_state.c | -rw-r--r-- | 25.7 KB |
| swapfile.c | -rw-r--r-- | 92.8 KB |
| truncate.c | -rw-r--r-- | 25.6 KB |
| usercopy.c | -rw-r--r-- | 8.1 KB |
| userfaultfd.c | -rw-r--r-- | 45.0 KB |
| util.c | -rw-r--r-- | 29.6 KB |
| vmalloc.c | -rw-r--r-- | 131.0 KB |
| vmpressure.c | -rw-r--r-- | 14.1 KB |
| vmscan.c | -rw-r--r-- | 207.3 KB |
| vmstat.c | -rw-r--r-- | 55.6 KB |
| workingset.c | -rw-r--r-- | 27.1 KB |
| z3fold.c | -rw-r--r-- | 36.8 KB |
| zbud.c | -rw-r--r-- | 12.8 KB |
| zpool.c | -rw-r--r-- | 9.9 KB |
| zsmalloc.c | -rw-r--r-- | 54.1 KB |
| zswap.c | -rw-r--r-- | 50.6 KB |
Computing file changes ...
