syzkaller login: [ 69.253098][ C0] BUG: unable to handle page fault for address: 00007710ffffea08 [ 69.261047][ C0] #PF: supervisor read access in kernel mode [ 69.267028][ C0] #PF: error_code(0x0000) - not-present page [ 69.273004][ C0] PGD 0 P4D 0 [ 69.276360][ C0] Oops: 0000 [#1] PREEMPT SMP KASAN [ 69.281540][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.12.0-rc8-next-20210423-syzkaller #0 [ 69.291149][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.301437][ C0] RIP: 0010:stack_depot_save+0x12b/0x4e0 [ 69.307916][ C0] Code: 05 7a 64 b8 0c 89 da 81 e2 ff ff 0f 00 4c 8d 3c d0 4d 8b 37 4d 85 f6 75 11 e9 94 00 00 00 4d 8b 36 4d 85 f6 0f 84 88 00 00 00 <41> 39 5e 08 75 ee 45 3b 66 0c 75 e8 31 c0 49 8b 4c c6 18 48 39 4c [ 69.327942][ C0] RSP: 0018:ffffc900000074b0 EFLAGS: 00010206 [ 69.334017][ C0] RAX: ffff88823b000000 RBX: 00000000b2ab8271 RCX: 0000000000000001 [ 69.342111][ C0] RDX: 00000000000b8271 RSI: 0000000000000800 RDI: 000000000b2f12b6 [ 69.350709][ C0] RBP: ffffc90000007520 R08: 00000000f87a1e3e R09: ffffffff8e3c75e0 [ 69.358941][ C0] R10: 0000000000000001 R11: 0000000000084087 R12: 0000000000000011 [ 69.366922][ C0] R13: 0000000000000011 R14: 00007710ffffea00 R15: ffff88823b5c1388 [ 69.374898][ C0] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 69.383972][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.391239][ C0] CR2: 00007710ffffea08 CR3: 000000000bc8e000 CR4: 00000000001506f0 [ 69.399314][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.407354][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.415667][ C0] Call Trace: [ 69.419301][ C0] [ 69.422146][ C0] ? kmem_cache_free+0x97/0x750 [ 69.427031][ C0] kasan_save_stack+0x32/0x40 [ 69.432012][ C0] ? kasan_save_stack+0x1b/0x40 [ 69.436883][ C0] ? kasan_set_track+0x1c/0x30 [ 69.441662][ C0] ? kasan_set_free_info+0x20/0x30 [ 69.446794][ C0] ? __kasan_slab_free+0xfb/0x130 [ 69.451837][ C0] ? slab_free_freelist_hook+0xdf/0x240 [ 69.457509][ C0] ? kmem_cache_free+0x97/0x750 [ 69.462413][ C0] ? kfree_skbmem+0xef/0x1b0 [ 69.467792][ C0] ? consume_skb+0xcf/0x160 [ 69.472408][ C0] ? arp_process+0xa83/0x24e0 [ 69.477217][ C0] ? arp_rcv+0x3d7/0x540 [ 69.481474][ C0] ? __netif_receive_skb_list_core+0x6c7/0x8e0 [ 69.487636][ C0] ? netif_receive_skb_list_internal+0x75e/0xd80 [ 69.494041][ C0] ? napi_complete_done+0x1f1/0x880 [ 69.499294][ C0] ? virtnet_poll+0xbeb/0x1180 [ 69.504356][ C0] ? __napi_poll+0xaf/0x440 [ 69.509110][ C0] ? net_rx_action+0x801/0xb40 [ 69.514031][ C0] ? __do_softirq+0x29b/0x9fe [ 69.518724][ C0] ? __irq_exit_rcu+0x136/0x200 [ 69.523585][ C0] ? irq_exit_rcu+0x5/0x20 [ 69.528005][ C0] ? common_interrupt+0xa4/0xd0 [ 69.532844][ C0] ? asm_common_interrupt+0x1e/0x40 [ 69.538200][ C0] ? acpi_idle_do_entry+0x1c9/0x250 [ 69.543459][ C0] ? acpi_idle_enter+0x361/0x500 [ 69.548389][ C0] ? cpuidle_enter_state+0x1b1/0xc80 [ 69.553656][ C0] ? cpuidle_enter+0x4a/0xa0 [ 69.558289][ C0] ? do_idle+0x3e8/0x590 [ 69.562681][ C0] ? cpu_startup_entry+0x14/0x20 [ 69.567624][ C0] ? start_kernel+0x47a/0x49b [ 69.572309][ C0] ? secondary_startup_64_no_verify+0xb0/0xbb [ 69.578729][ C0] ? debug_check_no_obj_freed+0x20c/0x420 [ 69.584487][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 69.589339][ C0] ? kfence_protect+0xb1/0x190 [ 69.594088][ C0] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 69.599879][ C0] ? lockdep_hardirqs_on+0x79/0x100 [ 69.605066][ C0] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 69.610856][ C0] ? debug_check_no_obj_freed+0x20c/0x420 [ 69.616564][ C0] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 69.622793][ C0] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 69.629284][ C0] kasan_set_track+0x1c/0x30 [ 69.633892][ C0] kasan_set_free_info+0x20/0x30 [ 69.638933][ C0] __kasan_slab_free+0xfb/0x130 [ 69.644010][ C0] slab_free_freelist_hook+0xdf/0x240 [ 69.649975][ C0] kmem_cache_free+0x97/0x750 [ 69.655109][ C0] ? kfree_skbmem+0xef/0x1b0 [ 69.659885][ C0] ? skb_release_data+0x622/0x750 [ 69.664936][ C0] kfree_skbmem+0xef/0x1b0 [ 69.669363][ C0] consume_skb+0xcf/0x160 [ 69.673696][ C0] arp_process+0xa83/0x24e0 [ 69.678403][ C0] ? arp_send+0x100/0x100 [ 69.683171][ C0] ? arp_req_delete+0x670/0x670 [ 69.688362][ C0] ? arp_send+0x100/0x100 [ 69.692695][ C0] arp_rcv+0x3d7/0x540 [ 69.696909][ C0] ? parp_redo+0x70/0x70 [ 69.701351][ C0] __netif_receive_skb_list_core+0x6c7/0x8e0 [ 69.707460][ C0] ? process_backlog+0x6c0/0x6c0 [ 69.712403][ C0] ? ktime_get_with_offset+0x3f2/0x500 [ 69.717876][ C0] ? lockdep_hardirqs_on+0x79/0x100 [ 69.723082][ C0] netif_receive_skb_list_internal+0x75e/0xd80 [ 69.729538][ C0] ? __netif_receive_skb_list_core+0x8e0/0x8e0 [ 69.735705][ C0] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 69.742071][ C0] ? detach_buf_split+0x599/0x7b0 [ 69.747110][ C0] ? __sanitizer_cov_trace_cmp2+0x22/0x80 [ 69.753066][ C0] napi_complete_done+0x1f1/0x880 [ 69.758434][ C0] virtnet_poll+0xbeb/0x1180 [ 69.763320][ C0] ? receive_buf+0x6250/0x6250 [ 69.768220][ C0] __napi_poll+0xaf/0x440 [ 69.772675][ C0] net_rx_action+0x801/0xb40 [ 69.777426][ C0] ? napi_threaded_poll+0x5b0/0x5b0 [ 69.782964][ C0] ? sched_clock_cpu+0x18/0x1f0 [ 69.787850][ C0] __do_softirq+0x29b/0x9fe [ 69.793038][ C0] __irq_exit_rcu+0x136/0x200 [ 69.797748][ C0] irq_exit_rcu+0x5/0x20 [ 69.801983][ C0] common_interrupt+0xa4/0xd0 [ 69.806652][ C0] [ 69.809714][ C0] asm_common_interrupt+0x1e/0x40 [ 69.814853][ C0] RIP: 0010:acpi_idle_do_entry+0x1c9/0x250 [ 69.820679][ C0] Code: fd 2a 5e f8 84 db 75 ac e8 44 24 5e f8 e8 6f 35 64 f8 e9 0c 00 00 00 e8 35 24 5e f8 0f 00 2d 3e 60 b7 00 e8 29 24 5e f8 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 34 2c 5e f8 48 85 db [ 69.840285][ C0] RSP: 0018:ffffffff8bc07d60 EFLAGS: 00000293 [ 69.846817][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 69.854788][ C0] RDX: ffffffff8bcbc540 RSI: ffffffff8916d547 RDI: 0000000000000000 [ 69.863056][ C0] RBP: ffff8880162b0064 R08: 0000000000000001 R09: 0000000000000001 [ 69.871153][ C0] R10: ffffffff817b0ad8 R11: 0000000000000000 R12: 0000000000000001 [ 69.886160][ C0] R13: ffff8880162b0000 R14: ffff8880162b0064 R15: ffff8881417ae804 [ 69.894276][ C0] ? trace_hardirqs_on+0x38/0x1c0 [ 69.899389][ C0] ? acpi_idle_do_entry+0x1c7/0x250 [ 69.904694][ C0] acpi_idle_enter+0x361/0x500 [ 69.909841][ C0] cpuidle_enter_state+0x1b1/0xc80 [ 69.914957][ C0] cpuidle_enter+0x4a/0xa0 [ 69.919362][ C0] do_idle+0x3e8/0x590 [ 69.923418][ C0] ? arch_cpu_idle_exit+0x30/0x30 [ 69.928992][ C0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe [ 69.935437][ C0] cpu_startup_entry+0x14/0x20 [ 69.940206][ C0] start_kernel+0x47a/0x49b [ 69.944822][ C0] secondary_startup_64_no_verify+0xb0/0xbb [ 69.951227][ C0] Modules linked in: [ 69.955123][ C0] CR2: 00007710ffffea08 [ 69.959280][ C0] ---[ end trace 9163078334f3b8cd ]--- [ 69.965024][ C0] RIP: 0010:stack_depot_save+0x12b/0x4e0 [ 69.970659][ C0] Code: 05 7a 64 b8 0c 89 da 81 e2 ff ff 0f 00 4c 8d 3c d0 4d 8b 37 4d 85 f6 75 11 e9 94 00 00 00 4d 8b 36 4d 85 f6 0f 84 88 00 00 00 <41> 39 5e 08 75 ee 45 3b 66 0c 75 e8 31 c0 49 8b 4c c6 18 48 39 4c [ 69.990678][ C0] RSP: 0018:ffffc900000074b0 EFLAGS: 00010206 [ 69.996997][ C0] RAX: ffff88823b000000 RBX: 00000000b2ab8271 RCX: 0000000000000001 [ 70.004994][ C0] RDX: 00000000000b8271 RSI: 0000000000000800 RDI: 000000000b2f12b6 [ 70.013224][ C0] RBP: ffffc90000007520 R08: 00000000f87a1e3e R09: ffffffff8e3c75e0 [ 70.021382][ C0] R10: 0000000000000001 R11: 0000000000084087 R12: 0000000000000011 [ 70.029343][ C0] R13: 0000000000000011 R14: 00007710ffffea00 R15: ffff88823b5c1388 [ 70.037555][ C0] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 70.046492][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.053421][ C0] CR2: 00007710ffffea08 CR3: 000000000bc8e000 CR4: 00000000001506f0 [ 70.061391][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.069349][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.077308][ C0] Kernel panic - not syncing: Fatal exception in interrupt [ 70.085126][ C0] Kernel Offset: disabled [ 70.089469][ C0] Rebooting in 86400 seconds..