[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 60.913574][ T8484] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 60.925531][ T8484] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 60.934010][ T8484] CPU: 0 PID: 8484 Comm: syz-executor116 Tainted: G W 5.13.0-syzkaller #0 [ 60.943963][ T8484] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.954306][ T8484] RIP: 0010:try_grab_compound_head+0x686/0x8f0 [ 60.960451][ T8484] Code: e9 16 fe ff ff e8 0a fe cc ff 0f 0b 45 31 e4 e9 07 fe ff ff e8 fb fd cc ff 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 44 02 00 00 48 8b 2b bf 03 00 00 00 49 bc 00 00 [ 60.980188][ T8484] RSP: 0018:ffffc900017df7e8 EFLAGS: 00010246 [ 60.986244][ T8484] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 60.994207][ T8484] RDX: 0000000000000000 RSI: ffffffff81a88c35 RDI: 0000000000000003 [ 61.002160][ T8484] RBP: 0000000000010000 R08: 0000000000000000 R09: 0000000000000003 [ 61.010110][ T8484] R10: ffffffff81a8862b R11: 000000000000003f R12: 0000000000040000 [ 61.018058][ T8484] R13: ffff88803ac03ff8 R14: 0000000000000000 R15: dffffc0000000000 [ 61.026008][ T8484] FS: 00000000005a5300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 61.034941][ T8484] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.041503][ T8484] CR2: 0000000020000084 CR3: 0000000021f85000 CR4: 00000000001506f0 [ 61.049459][ T8484] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.057419][ T8484] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.065382][ T8484] Call Trace: [ 61.068818][ T8484] follow_hugetlb_page+0x7bf/0x12c0 [ 61.074017][ T8484] __get_user_pages+0x5d8/0x1490 [ 61.078964][ T8484] ? follow_page_mask+0x14c0/0x14c0 [ 61.084270][ T8484] ? __zone_watermark_ok+0x450/0x450 [ 61.089568][ T8484] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 61.095370][ T8484] ? trace_hardirqs_on+0x5b/0x1c0 [ 61.100382][ T8484] __gup_longterm_locked+0x216/0xfa0 [ 61.105653][ T8484] ? lock_acquire+0x442/0x510 [ 61.110343][ T8484] ? pin_user_pages_unlocked+0x70/0x70 [ 61.115789][ T8484] ? __mod_node_page_state+0x98/0x130 [ 61.121255][ T8484] ? down_read+0x19a/0x440 [ 61.125666][ T8484] ? rwsem_down_read_slowpath+0x990/0x990 [ 61.131375][ T8484] pin_user_pages+0x84/0xc0 [ 61.135890][ T8484] io_sqe_buffer_register+0x24e/0x1350 [ 61.141348][ T8484] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 61.147578][ T8484] ? _copy_from_user+0x5d/0x180 [ 61.152518][ T8484] io_sqe_buffers_register+0x29c/0x620 [ 61.157986][ T8484] ? io_rsrc_data_alloc+0x370/0x370 [ 61.163166][ T8484] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 61.169489][ T8484] ? vm_mmap_pgoff+0xea/0x290 [ 61.174222][ T8484] __do_sys_io_uring_register+0x1049/0x2880 [ 61.180113][ T8484] ? lock_downgrade+0x6e0/0x6e0 [ 61.184973][ T8484] ? io_uring_setup+0x2b50/0x2b50 [ 61.190093][ T8484] ? get_vtime_delta+0x26e/0x420 [ 61.195162][ T8484] ? syscall_enter_from_user_mode+0x21/0x70 [ 61.201069][ T8484] do_syscall_64+0x35/0xb0 [ 61.205482][ T8484] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 61.211383][ T8484] RIP: 0033:0x43ef49 [ 61.215261][ T8484] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 61.234848][ T8484] RSP: 002b:00007ffea3542188 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab [ 61.243255][ T8484] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000043ef49 [ 61.251205][ T8484] RDX: 00000000200001c0 RSI: 0000000000000000 RDI: 0000000000000003 [ 61.259156][ T8484] RBP: 0000000000402f30 R08: 0000000010000000 R09: 0000000000000000 [ 61.267116][ T8484] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000402fc0 [ 61.275067][ T8484] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 61.283020][ T8484] Modules linked in: [ 61.287043][ T8484] ---[ end trace e3fc885187db8a03 ]--- [ 61.292513][ T8484] RIP: 0010:try_grab_compound_head+0x686/0x8f0 [ 61.298684][ T8484] Code: e9 16 fe ff ff e8 0a fe cc ff 0f 0b 45 31 e4 e9 07 fe ff ff e8 fb fd cc ff 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 44 02 00 00 48 8b 2b bf 03 00 00 00 49 bc 00 00 [ 61.320641][ T8484] RSP: 0018:ffffc900017df7e8 EFLAGS: 00010246 [ 61.326867][ T8484] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 61.334996][ T8484] RDX: 0000000000000000 RSI: ffffffff81a88c35 RDI: 0000000000000003 [ 61.343116][ T8484] RBP: 0000000000010000 R08: 0000000000000000 R09: 0000000000000003 [ 61.351190][ T8484] R10: ffffffff81a8862b R11: 000000000000003f R12: 0000000000040000 [ 61.359258][ T8484] R13: ffff88803ac03ff8 R14: 0000000000000000 R15: dffffc0000000000 [ 61.367293][ T8484] FS: 00000000005a5300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 61.376397][ T8484] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.383048][ T8484] CR2: 0000000020000084 CR3: 0000000021f85000 CR4: 00000000001506f0 [ 61.391064][ T8484] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.399039][ T8484] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.407053][ T8484] Kernel panic - not syncing: Fatal exception [ 61.413166][ T8484] Kernel Offset: disabled [ 61.417569][ T8484] Rebooting in 86400 seconds..