[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.121' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.805578][ T8503] BUG: unable to handle page fault for address: ffffffff81417c79 [ 68.813299][ T8503] #PF: supervisor write access in kernel mode [ 68.819333][ T8503] #PF: error_code(0x0003) - permissions violation [ 68.825713][ T8503] PGD b08f067 P4D b08f067 PUD b090063 PMD 14001e1 [ 68.832238][ T8503] Oops: 0003 [#1] PREEMPT SMP KASAN [ 68.837408][ T8503] CPU: 1 PID: 8503 Comm: syz-executor118 Not tainted 5.10.0-rc5-next-20201130-syzkaller #0 [ 68.847346][ T8503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.857394][ T8503] RIP: 0010:workingset_age_nonresident+0x179/0x1c0 [ 68.863883][ T8503] Code: 85 db 0f 85 c8 fe ff ff 5b 5d 41 5c 41 5d 41 5e 41 5f e9 6a 67 cf ff e8 65 67 cf ff 49 8d 9d 18 4d 00 00 eb b3 e8 57 67 cf ff <4c> 89 ab c0 00 00 00 eb c7 e8 69 35 12 00 e9 d3 fe ff ff e8 5f 35 [ 68.883467][ T8503] RSP: 0018:ffffc9000112f4c0 EFLAGS: 00010093 [ 68.889543][ T8503] RAX: 0000000000000000 RBX: ffffffff81417bb9 RCX: 0000000000000000 [ 68.897493][ T8503] RDX: ffff88801eee5040 RSI: ffffffff81a159f9 RDI: ffffffff81417c79 [ 68.905439][ T8503] RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff88813ffffdbf [ 68.913429][ T8503] R10: ffffed1027ffffb7 R11: 0000000000000000 R12: ffffffff8e7911d0 [ 68.921409][ T8503] R13: ffff88813fffb000 R14: 0000000000000001 R15: ffffffff8e7910b0 [ 68.929354][ T8503] FS: 0000000002581880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 68.938254][ T8503] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.944824][ T8503] CR2: ffffffff81417c79 CR3: 0000000013a2f000 CR4: 00000000001506e0 [ 68.952770][ T8503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.960727][ T8503] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.968667][ T8503] Call Trace: [ 68.971936][ T8503] workingset_eviction+0x452/0x9b0 [ 68.977020][ T8503] __remove_mapping+0x867/0xd20 [ 68.981845][ T8503] shrink_page_list+0x246a/0x5e80 [ 68.986858][ T8503] ? pageout+0x1220/0x1220 [ 68.991349][ T8503] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 68.997314][ T8503] ? mark_lock+0xf7/0x1730 [ 69.001708][ T8503] reclaim_pages+0x3e2/0xcd0 [ 69.006270][ T8503] ? isolate_lru_page+0xbb0/0xbb0 [ 69.011266][ T8503] ? find_held_lock+0x2d/0x110 [ 69.016001][ T8503] ? lock_downgrade+0x6d0/0x6d0 [ 69.020836][ T8503] ? lockdep_hardirqs_on+0x79/0x100 [ 69.026020][ T8503] ? _raw_spin_unlock_irq+0x2a/0x40 [ 69.031241][ T8503] madvise_cold_or_pageout_pte_range+0x1615/0x2880 [ 69.037723][ T8503] ? swapin_walk_pmd_entry+0x690/0x690 [ 69.043157][ T8503] ? swapin_walk_pmd_entry+0x690/0x690 [ 69.048592][ T8503] __walk_page_range+0xda4/0x1e20 [ 69.053649][ T8503] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 69.059862][ T8503] ? walk_page_test+0x78/0x180 [ 69.064599][ T8503] walk_page_range+0x1be/0x450 [ 69.069335][ T8503] ? __walk_page_range+0x1e20/0x1e20 [ 69.074595][ T8503] madvise_pageout+0x21b/0x390 [ 69.079331][ T8503] ? madvise_free_single_vma+0x550/0x550 [ 69.084938][ T8503] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 69.090629][ T8503] ? vmacache_find+0x62/0x330 [ 69.095316][ T8503] ? find_vma_prev+0x7d/0x260 [ 69.099965][ T8503] ? __mm_populate+0x2e0/0x3e0 [ 69.104702][ T8503] do_madvise.part.0+0x9f2/0x1ed0 [ 69.109699][ T8503] ? vm_mmap_pgoff+0xea/0x290 [ 69.114345][ T8503] ? madvise_cold+0x210/0x210 [ 69.119035][ T8503] ? randomize_stack_top+0x100/0x100 [ 69.124331][ T8503] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 69.130548][ T8503] __x64_sys_madvise+0x113/0x150 [ 69.135588][ T8503] ? lockdep_hardirqs_on+0x79/0x100 [ 69.140759][ T8503] do_syscall_64+0x2d/0x70 [ 69.145148][ T8503] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 69.151024][ T8503] RIP: 0033:0x440279 [ 69.154895][ T8503] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 69.174472][ T8503] RSP: 002b:00007ffe7c1ab298 EFLAGS: 00000246 ORIG_RAX: 000000000000001c [ 69.182862][ T8503] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440279 [ 69.190808][ T8503] RDX: 0000000000000015 RSI: 0000000000600003 RDI: 0000000020000000 [ 69.198751][ T8503] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 69.206693][ T8503] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401a80 [ 69.214637][ T8503] R13: 0000000000401b10 R14: 0000000000000000 R15: 0000000000000000 [ 69.222625][ T8503] Modules linked in: [ 69.226493][ T8503] CR2: ffffffff81417c79 [ 69.230624][ T8503] ---[ end trace 89bcebda47215cf6 ]--- [ 69.236058][ T8503] RIP: 0010:workingset_age_nonresident+0x179/0x1c0 [ 69.242530][ T8503] Code: 85 db 0f 85 c8 fe ff ff 5b 5d 41 5c 41 5d 41 5e 41 5f e9 6a 67 cf ff e8 65 67 cf ff 49 8d 9d 18 4d 00 00 eb b3 e8 57 67 cf ff <4c> 89 ab c0 00 00 00 eb c7 e8 69 35 12 00 e9 d3 fe ff ff e8 5f 35 [ 69.262220][ T8503] RSP: 0018:ffffc9000112f4c0 EFLAGS: 00010093 [ 69.268257][ T8503] RAX: 0000000000000000 RBX: ffffffff81417bb9 RCX: 0000000000000000 [ 69.276205][ T8503] RDX: ffff88801eee5040 RSI: ffffffff81a159f9 RDI: ffffffff81417c79 [ 69.284152][ T8503] RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff88813ffffdbf [ 69.292098][ T8503] R10: ffffed1027ffffb7 R11: 0000000000000000 R12: ffffffff8e7911d0 [ 69.300041][ T8503] R13: ffff88813fffb000 R14: 0000000000000001 R15: ffffffff8e7910b0 [ 69.308001][ T8503] FS: 0000000002581880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 69.316904][ T8503] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.323460][ T8503] CR2: ffffffff81417c79 CR3: 0000000013a2f000 CR4: 00000000001506e0 [ 69.331446][ T8503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.339400][ T8503] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.347386][ T8503] Kernel panic - not syncing: Fatal exception [ 69.354164][ T8503] Kernel Offset: disabled [ 69.358473][ T8503] Rebooting in 86400 seconds..