[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.85' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 78.202880][ T26] audit: type=1400 audit(1598077144.112:8): avc: denied { execmem } for pid=6869 comm="syz-executor151" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 78.448973][ T6873] general protection fault, probably for non-canonical address 0xdffffc000000001e: 0000 [#1] PREEMPT SMP KASAN [ 78.460715][ T6873] KASAN: null-ptr-deref in range [0x00000000000000f0-0x00000000000000f7] [ 78.469246][ T6873] CPU: 0 PID: 6873 Comm: systemd-udevd Not tainted 5.9.0-rc1-syzkaller #0 [ 78.477737][ T6873] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.488077][ T6873] RIP: 0010:bdev_read_page+0x37/0x290 executing program executing program executing program executing program executing program executing program executing program executing program [ 78.493449][ T6873] Code: 4c 8d b3 f0 00 00 00 48 83 ec 10 48 89 54 24 08 48 89 34 24 e8 6a f8 a3 ff 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 e8 01 00 00 48 8b ab f0 00 00 00 48 ba 00 00 00 [ 78.513723][ T6873] RSP: 0018:ffffc90004fa7560 EFLAGS: 00010206 [ 78.519949][ T6873] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81d115ba [ 78.528072][ T6873] RDX: 000000000000001e RSI: ffffffff81d046a6 RDI: 0000000000000000 [ 78.536439][ T6873] RBP: fff8974587e00000 R08: 0000000000000001 R09: ffffea000273c087 [ 78.544413][ T6873] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 78.552543][ T6873] R13: 0000000000000000 R14: 00000000000000f0 R15: ffffc90004fa7780 [ 78.560681][ T6873] FS: 00007fda31eaa8c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 78.569614][ T6873] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.576199][ T6873] CR2: 000055fe3c51bc58 CR3: 00000000a75d9000 CR4: 00000000001506f0 [ 78.584164][ T6873] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.592139][ T6873] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.600299][ T6873] Call Trace: [ 78.603595][ T6873] do_mpage_readpage+0x10ca/0x1ef0 [ 78.608717][ T6873] ? lock_downgrade+0x830/0x830 [ 78.614306][ T6873] ? mpage_writepage+0x1b0/0x1b0 [ 78.619259][ T6873] ? __xa_clear_mark+0x110/0x110 [ 78.624472][ T6873] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 78.630499][ T6873] ? __lock_acquire+0x16cb/0x5640 [ 78.635834][ T6873] mpage_readahead+0x3a3/0x880 [ 78.640607][ T6873] ? do_mpage_readpage+0x1ef0/0x1ef0 [ 78.646133][ T6873] ? bdev_evict_inode+0x410/0x410 [ 78.651870][ T6873] ? lock_downgrade+0x830/0x830 [ 78.656728][ T6873] ? blkdev_write_begin+0x40/0x40 [ 78.661755][ T6873] read_pages+0x1df/0x8d0 [ 78.666222][ T6873] ? read_cache_pages+0x750/0x750 [ 78.671247][ T6873] ? add_to_page_cache_lru+0x2ab/0x5b0 [ 78.676703][ T6873] ? alloc_pages_current+0x18f/0x280 [ 78.681985][ T6873] ? __page_cache_alloc+0x10b/0x450 [ 78.687189][ T6873] page_cache_readahead_unbounded+0x572/0x850 [ 78.693252][ T6873] ? lock_acquire+0x1f1/0xad0 [ 78.697923][ T6873] ? read_pages+0x8d0/0x8d0 [ 78.702435][ T6873] ? blk_cgroup_congested+0x1f9/0x3e0 [ 78.707830][ T6873] force_page_cache_readahead+0x2e9/0x460 [ 78.713551][ T6873] page_cache_sync_readahead+0x113/0x130 [ 78.719188][ T6873] generic_file_buffered_read+0x159d/0x3150 [ 78.725208][ T6873] generic_file_read_iter+0x396/0x4e0 [ 78.730592][ T6873] blkdev_read_iter+0x11b/0x180 [ 78.735587][ T6873] new_sync_read+0x41a/0x6e0 [ 78.740184][ T6873] ? vfs_dedupe_file_range+0x780/0x780 [ 78.745683][ T6873] ? selinux_file_permission+0x92/0x520 [ 78.751238][ T6873] vfs_read+0x383/0x5a0 [ 78.755548][ T6873] ksys_read+0x12d/0x250 [ 78.759803][ T6873] ? vfs_write+0x730/0x730 [ 78.764359][ T6873] ? __secure_computing+0x104/0x360 [ 78.769568][ T6873] do_syscall_64+0x2d/0x70 [ 78.773990][ T6873] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 78.779883][ T6873] RIP: 0033:0x7fda30ff1210 [ 78.784386][ T6873] Code: 73 01 c3 48 8b 0d 98 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d b9 c1 20 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 4e fc ff ff 48 89 04 24 [ 78.804183][ T6873] RSP: 002b:00007ffd4d8ff508 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 78.812673][ T6873] RAX: ffffffffffffffda RBX: 000055fe3c52aba0 RCX: 00007fda30ff1210 [ 78.820647][ T6873] RDX: 0000000000000400 RSI: 000055fe3c52abc8 RDI: 000000000000000f [ 78.828748][ T6873] RBP: 000055fe3c52d160 R08: 00007fda30fdbfd8 R09: 0000000000000430 [ 78.836719][ T6873] R10: 000055fe3c52abb8 R11: 0000000000000246 R12: 0000000000000000 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 78.844693][ T6873] R13: 0000000000000400 R14: 000055fe3c52d1b0 R15: 0000000000000400 [ 78.852683][ T6873] Modules linked in: [ 78.879493][ T6873] ---[ end trace ea5043d044a0e30e ]--- [ 78.886727][ T6873] RIP: 0010:bdev_read_page+0x37/0x290 executing program executing program executing program executing program executing program executing program executing program executing program [ 78.901163][ T6873] Code: 4c 8d b3 f0 00 00 00 48 83 ec 10 48 89 54 24 08 48 89 34 24 e8 6a f8 a3 ff 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 e8 01 00 00 48 8b ab f0 00 00 00 48 ba 00 00 00 [ 78.926352][ T6873] RSP: 0018:ffffc90004fa7560 EFLAGS: 00010206 [ 78.932968][ T6873] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81d115ba [ 78.941131][ T6873] RDX: 000000000000001e RSI: ffffffff81d046a6 RDI: 0000000000000000 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 78.949152][ T6873] RBP: fff8974587e00000 R08: 0000000000000001 R09: ffffea000273c087 [ 78.957391][ T6873] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 78.965461][ T6873] R13: 0000000000000000 R14: 00000000000000f0 R15: ffffc90004fa7780 [ 78.974261][ T6873] FS: 00007fda31eaa8c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 78.983408][ T6873] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.990082][ T6873] CR2: 00007f42ed1ff000 CR3: 00000000a75d9000 CR4: 00000000001506e0 executing program executing program executing program executing program executing program [ 78.998059][ T6873] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.008893][ T6873] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.016883][ T6873] Kernel panic - not syncing: Fatal exception [ 79.023762][ T6873] Kernel Offset: disabled [ 79.028194][ T6873] Rebooting in 86400 seconds..