[ OK ] Started Getty on tty3. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.171' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 60.991140][ T6833] general protection fault, probably for non-canonical address 0xdffffc000000001e: 0000 [#1] PREEMPT SMP KASAN [ 61.002872][ T6833] KASAN: null-ptr-deref in range [0x00000000000000f0-0x00000000000000f7] [ 61.011276][ T6833] CPU: 1 PID: 6833 Comm: systemd-udevd Not tainted 5.9.0-rc1-syzkaller #0 [ 61.019759][ T6833] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.029809][ T6833] RIP: 0010:bdev_read_page+0x37/0x290 [ 61.035153][ T6833] Code: 4c 8d b3 f0 00 00 00 48 83 ec 10 48 89 54 24 08 48 89 34 24 e8 ea f3 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 [ 61.054767][ T6833] RSP: 0018:ffffc90001097560 EFLAGS: 00010206 [ 61.060804][ T6833] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81d11a3a [ 61.068747][ T6833] RDX: 000000000000001e RSI: ffffffff81d04b26 RDI: 0000000000000000 [ 61.076690][ T6833] RBP: fff897467d600000 R08: 0000000000000001 R09: ffffea0002269947 [ 61.084632][ T6833] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 61.092574][ T6833] R13: 0000000000000000 R14: 00000000000000f0 R15: ffffc90001097780 [ 61.100521][ T6833] FS: 00007f81fabc28c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 61.109420][ T6833] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.115985][ T6833] CR2: 00000000ffc28828 CR3: 00000000a149d000 CR4: 00000000001506e0 [ 61.123942][ T6833] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.131884][ T6833] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.140009][ T6833] Call Trace: [ 61.143285][ T6833] do_mpage_readpage+0x10ca/0x1ef0 [ 61.148368][ T6833] ? lock_downgrade+0x830/0x830 [ 61.153200][ T6833] ? mpage_writepage+0x1b0/0x1b0 [ 61.158132][ T6833] ? __xa_clear_mark+0x110/0x110 [ 61.163043][ T6833] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 61.169015][ T6833] ? __lock_acquire+0x16cb/0x5640 [ 61.174041][ T6833] mpage_readahead+0x3a3/0x880 [ 61.178777][ T6833] ? do_mpage_readpage+0x1ef0/0x1ef0 [ 61.184038][ T6833] ? bdev_evict_inode+0x410/0x410 [ 61.189046][ T6833] ? lock_downgrade+0x830/0x830 [ 61.193884][ T6833] ? blkdev_write_begin+0x40/0x40 [ 61.198881][ T6833] read_pages+0x1df/0x8d0 [ 61.203186][ T6833] ? read_cache_pages+0x750/0x750 [ 61.208196][ T6833] ? add_to_page_cache_lru+0x2ab/0x5b0 [ 61.213631][ T6833] ? alloc_pages_current+0x18f/0x280 [ 61.218892][ T6833] ? __page_cache_alloc+0x10b/0x450 [ 61.224070][ T6833] page_cache_readahead_unbounded+0x572/0x850 [ 61.230152][ T6833] ? lock_acquire+0x1f1/0xad0 [ 61.234806][ T6833] ? read_pages+0x8d0/0x8d0 [ 61.239285][ T6833] ? blk_cgroup_congested+0x1f9/0x3e0 [ 61.244633][ T6833] force_page_cache_readahead+0x2e9/0x460 [ 61.250407][ T6833] page_cache_sync_readahead+0x113/0x130 [ 61.256012][ T6833] generic_file_buffered_read+0x159d/0x3150 [ 61.261880][ T6833] generic_file_read_iter+0x396/0x4e0 [ 61.267234][ T6833] ? aa_path_link+0x2f0/0x2f0 [ 61.271894][ T6833] blkdev_read_iter+0x11b/0x180 [ 61.276718][ T6833] new_sync_read+0x41a/0x6e0 [ 61.281288][ T6833] ? vfs_dedupe_file_range+0x780/0x780 [ 61.286721][ T6833] vfs_read+0x383/0x5a0 [ 61.290850][ T6833] ksys_read+0x12d/0x250 [ 61.295062][ T6833] ? vfs_write+0x730/0x730 [ 61.299449][ T6833] ? __secure_computing+0x104/0x360 [ 61.304619][ T6833] do_syscall_64+0x2d/0x70 [ 61.309008][ T6833] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.314877][ T6833] RIP: 0033:0x7f81f9d09210 [ 61.319276][ T6833] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 61.338853][ T6833] RSP: 002b:00007ffd9be7e568 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 61.347477][ T6833] RAX: ffffffffffffffda RBX: 0000562417b06340 RCX: 00007f81f9d09210 [ 61.355429][ T6833] RDX: 0000000000000400 RSI: 0000562417b06368 RDI: 000000000000000f [ 61.363372][ T6833] RBP: 0000562417af2f20 R08: 00007f81f9cf3f68 R09: 0000000000000430 [ 61.371341][ T6833] R10: 0000562417b06358 R11: 0000000000000246 R12: 0000000000000000 [ 61.379293][ T6833] R13: 0000000000000400 R14: 0000562417af2f70 R15: 0000000000000400 [ 61.387241][ T6833] 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 [ 61.399360][ T6833] ---[ end trace 60d08b19c7fbad58 ]--- [ 61.404978][ T6833] RIP: 0010:bdev_read_page+0x37/0x290 [ 61.410708][ T6833] Code: 4c 8d b3 f0 00 00 00 48 83 ec 10 48 89 54 24 08 48 89 34 24 e8 ea f3 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 [ 61.431087][ T6833] RSP: 0018:ffffc90001097560 EFLAGS: 00010206 [ 61.437301][ T6833] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81d11a3a executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 61.446058][ T6833] RDX: 000000000000001e RSI: ffffffff81d04b26 RDI: 0000000000000000 [ 61.454468][ T6833] RBP: fff897467d600000 R08: 0000000000000001 R09: ffffea0002269947 [ 61.462701][ T6833] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 61.470890][ T6833] R13: 0000000000000000 R14: 00000000000000f0 R15: ffffc90001097780 [ 61.479138][ T6833] FS: 00007f81fabc28c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 61.488316][ T6833] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.495093][ T6833] CR2: 00007f036acc4000 CR3: 00000000a149d000 CR4: 00000000001506e0 [ 61.503438][ T6833] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.511635][ T6833] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.519841][ T6833] Kernel panic - not syncing: Fatal exception [ 61.527252][ T6833] Kernel Offset: disabled [ 61.531562][ T6833] Rebooting in 86400 seconds..