[ 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 '10.128.0.162' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 66.578102][ T6835] general protection fault, probably for non-canonical address 0xdffffc000000001e: 0000 [#1] PREEMPT SMP KASAN [ 66.589849][ T6835] KASAN: null-ptr-deref in range [0x00000000000000f0-0x00000000000000f7] [ 66.598248][ T6835] CPU: 1 PID: 6835 Comm: systemd-udevd Not tainted 5.9.0-rc1-syzkaller #0 [ 66.606765][ T6835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.616817][ T6835] RIP: 0010:bdev_read_page+0x37/0x290 [ 66.622165][ T6835] Code: 4c 8d b3 f0 00 00 00 48 83 ec 10 48 89 54 24 08 48 89 34 24 e8 ba f6 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 [ 66.641743][ T6835] RSP: 0018:ffffc90005307560 EFLAGS: 00010206 [ 66.647779][ T6835] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81d1176a [ 66.655727][ T6835] RDX: 000000000000001e RSI: ffffffff81d04856 RDI: 0000000000000000 [ 66.663668][ T6835] RBP: fff8974639600000 R08: 0000000000000001 R09: ffffea00024c2507 [ 66.671610][ T6835] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 66.679553][ T6835] R13: 0000000000000000 R14: 00000000000000f0 R15: ffffc90005307780 [ 66.687545][ T6835] FS: 00007fecfa1fe8c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 66.696444][ T6835] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.703001][ T6835] CR2: 00000000004a6236 CR3: 0000000099463000 CR4: 00000000001506e0 [ 66.710947][ T6835] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.718889][ T6835] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.726836][ T6835] Call Trace: [ 66.730103][ T6835] do_mpage_readpage+0x10ca/0x1ef0 [ 66.735200][ T6835] ? lock_downgrade+0x830/0x830 [ 66.740023][ T6835] ? mpage_writepage+0x1b0/0x1b0 [ 66.744977][ T6835] ? __xa_clear_mark+0x110/0x110 [ 66.749928][ T6835] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 66.755884][ T6835] ? __lock_acquire+0x16cb/0x5640 [ 66.760879][ T6835] mpage_readahead+0x3a3/0x880 [ 66.765614][ T6835] ? do_mpage_readpage+0x1ef0/0x1ef0 [ 66.770874][ T6835] ? bdev_evict_inode+0x410/0x410 [ 66.775872][ T6835] ? lock_downgrade+0x830/0x830 [ 66.780737][ T6835] ? blkdev_write_begin+0x40/0x40 [ 66.785732][ T6835] read_pages+0x1df/0x8d0 [ 66.790077][ T6835] ? read_cache_pages+0x750/0x750 [ 66.795115][ T6835] ? add_to_page_cache_lru+0x2ab/0x5b0 [ 66.800547][ T6835] ? alloc_pages_current+0x18f/0x280 [ 66.805806][ T6835] ? __page_cache_alloc+0x10b/0x450 [ 66.810990][ T6835] page_cache_readahead_unbounded+0x572/0x850 [ 66.817029][ T6835] ? lock_acquire+0x1f1/0xad0 [ 66.821696][ T6835] ? read_pages+0x8d0/0x8d0 [ 66.826186][ T6835] ? blk_cgroup_congested+0x1f9/0x3e0 [ 66.831532][ T6835] force_page_cache_readahead+0x2e9/0x460 [ 66.837224][ T6835] page_cache_sync_readahead+0x113/0x130 [ 66.842827][ T6835] generic_file_buffered_read+0x159d/0x3150 [ 66.848781][ T6835] generic_file_read_iter+0x396/0x4e0 [ 66.854125][ T6835] ? aa_path_link+0x2f0/0x2f0 [ 66.858774][ T6835] blkdev_read_iter+0x11b/0x180 [ 66.863617][ T6835] new_sync_read+0x41a/0x6e0 [ 66.868195][ T6835] ? vfs_dedupe_file_range+0x780/0x780 [ 66.873660][ T6835] vfs_read+0x383/0x5a0 [ 66.877794][ T6835] ksys_read+0x12d/0x250 [ 66.882008][ T6835] ? vfs_write+0x730/0x730 [ 66.886399][ T6835] ? __secure_computing+0x104/0x360 [ 66.891622][ T6835] do_syscall_64+0x2d/0x70 [ 66.896011][ T6835] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.902010][ T6835] RIP: 0033:0x7fecf9345210 [ 66.906417][ T6835] 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 [ 66.926117][ T6835] RSP: 002b:00007fff4f235a08 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 66.934500][ T6835] RAX: ffffffffffffffda RBX: 000055dd87d6dda0 RCX: 00007fecf9345210 [ 66.942445][ T6835] RDX: 0000000000000400 RSI: 000055dd87d6ddc8 RDI: 000000000000000f [ 66.950388][ T6835] RBP: 000055dd87d74a60 R08: 00007fecf932ff88 R09: 0000000000000430 [ 66.958353][ T6835] R10: 000055dd87d6ddb8 R11: 0000000000000246 R12: 0000000000000000 [ 66.966311][ T6835] R13: 0000000000000400 R14: 000055dd87d74ab0 R15: 0000000000000400 [ 66.974272][ T6835] Modules linked in: 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 [ 66.982017][ T6835] ---[ end trace b9d95e5785945a23 ]--- [ 66.987753][ T6835] RIP: 0010:bdev_read_page+0x37/0x290 [ 66.993261][ T6835] Code: 4c 8d b3 f0 00 00 00 48 83 ec 10 48 89 54 24 08 48 89 34 24 e8 ba f6 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 [ 67.013378][ T6835] RSP: 0018:ffffc90005307560 EFLAGS: 00010206 [ 67.019746][ T6835] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81d1176a 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 [ 67.028315][ T6835] RDX: 000000000000001e RSI: ffffffff81d04856 RDI: 0000000000000000 [ 67.036808][ T6835] RBP: fff8974639600000 R08: 0000000000000001 R09: ffffea00024c2507 [ 67.044966][ T6835] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 67.053425][ T6835] R13: 0000000000000000 R14: 00000000000000f0 R15: ffffc90005307780 [ 67.061812][ T6835] FS: 00007fecfa1fe8c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 67.071150][ T6835] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 executing program executing program executing program executing program executing program executing program executing program executing program [ 67.078054][ T6835] CR2: 00000000004c3a28 CR3: 0000000099463000 CR4: 00000000001506e0 [ 67.086358][ T6835] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.094540][ T6835] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.102964][ T6835] Kernel panic - not syncing: Fatal exception [ 67.110262][ T6835] Kernel Offset: disabled [ 67.114575][ T6835] Rebooting in 86400 seconds..