[ OK ] Started Daily apt download activities. [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ OK ] Found device /dev/ttyS0. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ 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 '10.128.15.192' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 82.997734][ T35] audit: type=1400 audit(1608676959.446:8): avc: denied { execmem } for pid=8516 comm="syz-executor204" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 83.015215][ T8518] loop0: detected capacity change from 96 to 0 [ 83.038413][ T8518] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024) [ 83.050080][ T8518] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 2048) [ 83.062380][ T8518] NILFS (loop0): mounting unchecked fs [ 83.078574][ T8518] NILFS (loop0): recovery complete [ 83.090580][ T8521] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 83.108361][ T8518] ------------[ cut here ]------------ [ 83.114156][ T8518] WARNING: CPU: 1 PID: 8518 at include/linux/backing-dev.h:283 account_page_dirtied+0x787/0xa20 [ 83.124776][ T8518] Modules linked in: [ 83.128701][ T8518] CPU: 1 PID: 8518 Comm: syz-executor204 Not tainted 5.10.0-syzkaller #0 [ 83.137526][ T8518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.147815][ T8518] RIP: 0010:account_page_dirtied+0x787/0xa20 [ 83.153843][ T8518] Code: a8 01 00 00 be ff ff ff ff 48 8d 78 70 e8 f1 4c 81 07 31 ff 89 c3 89 c6 e8 b6 cf d9 ff 85 db 0f 85 9c fa ff ff e8 89 c9 d9 ff <0f> 0b e9 90 fa ff ff e8 7d c9 d9 ff 48 89 ee 4c 89 ef e8 52 06 34 [ 83.174056][ T8518] RSP: 0018:ffffc90001b573d8 EFLAGS: 00010093 [ 83.180254][ T8518] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 83.188497][ T8518] RDX: ffff8880284de040 RSI: ffffffff81997c67 RDI: 0000000000000003 [ 83.196505][ T8518] RBP: ffffea000071e100 R08: 0000000000000000 R09: ffff888037fcdc3f [ 83.204504][ T8518] R10: ffffffff81997c5a R11: 0000000000000000 R12: ffff888037fcdc38 [ 83.212506][ T8518] R13: ffff888037fcda90 R14: ffff888037fcd8e0 R15: ffffea000071e108 [ 83.220733][ T8518] FS: 00007ff46ac10700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 83.230177][ T8518] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.237447][ T8518] CR2: 000056404ff9d720 CR3: 0000000013907000 CR4: 00000000001506e0 [ 83.245540][ T8518] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.253681][ T8518] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.261697][ T8518] Call Trace: [ 83.265110][ T8518] __set_page_dirty+0x7f/0x400 [ 83.269954][ T8518] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 83.277270][ T8518] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 83.284029][ T8518] mark_buffer_dirty+0x466/0x5f0 [ 83.289025][ T8518] nilfs_btree_convert_and_insert+0xdaf/0x1170 [ 83.295420][ T8518] ? nilfs_btree_last_key+0x5e0/0x5e0 [ 83.300939][ T8518] ? down_write_killable_nested+0x170/0x170 [ 83.307011][ T8518] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 83.312859][ T8518] ? nilfs_direct_gather_data+0xfe/0x160 [ 83.318544][ T8518] nilfs_bmap_insert+0x2a1/0x3f0 [ 83.323525][ T8518] ? nilfs_bmap_lookup_contig+0x180/0x180 [ 83.329285][ T8518] ? mark_page_accessed+0x273/0x1bd0 [ 83.334597][ T8518] nilfs_mdt_get_block+0x5bf/0xdb0 [ 83.339881][ T8518] ? nilfs_mdt_read_block+0x3f0/0x3f0 [ 83.345650][ T8518] ? do_raw_spin_lock+0x120/0x2b0 [ 83.350818][ T8518] ? rwlock_bug.part.0+0x90/0x90 [ 83.355878][ T8518] nilfs_palloc_get_block+0xc4/0x2b0 [ 83.361272][ T8518] nilfs_palloc_get_entry_block+0x167/0x1d0 [ 83.367329][ T8518] nilfs_dat_prepare_alloc+0x61/0xb0 [ 83.372958][ T8518] nilfs_direct_insert+0x3f2/0x530 [ 83.378151][ T8518] ? nilfs_direct_assign+0x440/0x440 [ 83.383784][ T8518] ? down_write_killable_nested+0x170/0x170 [ 83.389911][ T8518] nilfs_bmap_insert+0x27a/0x3f0 [ 83.395132][ T8518] ? nilfs_direct_last_key+0xf0/0xf0 [ 83.400930][ T8518] ? nilfs_bmap_lookup_contig+0x180/0x180 [ 83.406934][ T8518] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 83.413284][ T8518] ? trace_nilfs2_transaction_transition+0x1e5/0x260 [ 83.419979][ T8518] ? nilfs_transaction_begin+0x41d/0xa10 [ 83.425721][ T8518] nilfs_get_block+0x562/0xa50 [ 83.430508][ T8518] ? __nilfs_mark_inode_dirty+0x230/0x230 [ 83.436278][ T8518] ? create_empty_buffers+0x58f/0x820 [ 83.441730][ T8518] ? do_raw_spin_unlock+0x171/0x230 [ 83.446940][ T8518] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 83.453431][ T8518] ? __nilfs_mark_inode_dirty+0x230/0x230 [ 83.459252][ T8518] __block_write_begin_int+0x424/0x1770 [ 83.464938][ T8518] ? __nilfs_mark_inode_dirty+0x230/0x230 [ 83.471158][ T8518] ? __page_cache_alloc+0x10d/0x360 [ 83.476565][ T8518] ? remove_inode_buffers+0x1b0/0x1b0 [ 83.482096][ T8518] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 83.488434][ T8518] ? pagecache_get_page+0x23c/0x1460 [ 83.494273][ T8518] nilfs_make_empty+0x10a/0x820 [ 83.499308][ T8518] nilfs_mkdir+0x1e8/0x360 [ 83.504837][ T8518] ? nilfs_unlink+0x1c0/0x1c0 [ 83.509611][ T8518] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 83.515878][ T8518] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 83.523307][ T8518] vfs_mkdir+0x1b7/0x340 [ 83.528870][ T8518] ? security_path_mkdir+0x11b/0x160 [ 83.534233][ T8518] do_mkdirat+0x262/0x2d0 [ 83.538603][ T8518] ? user_path_create+0xf0/0xf0 [ 83.543946][ T8518] ? syscall_enter_from_user_mode+0x1d/0x50 [ 83.550336][ T8518] do_syscall_64+0x2d/0x70 [ 83.554901][ T8518] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 83.560835][ T8518] RIP: 0033:0x44b259 [ 83.564850][ T8518] Code: 7d cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 4b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 83.585592][ T8518] RSP: 002b:00007ff46ac0fd88 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 83.594098][ T8518] RAX: ffffffffffffffda RBX: 00000000006ddc28 RCX: 000000000044b259 [ 83.602777][ T8518] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 00000000ffffff9c [ 83.610765][ T8518] RBP: 00000000006ddc20 R08: 0000000000000000 R09: 0000000000000000 [ 83.620094][ T8518] R10: 0000000000000000 R11: 0000000000000246 R12: 000000005f671b56 [ 83.628261][ T8518] R13: 000000005f671b56 R14: 0000000000000000 R15: 0000000000000000 [ 83.636863][ T8518] Kernel panic - not syncing: panic_on_warn set ... [ 83.643452][ T8518] CPU: 1 PID: 8518 Comm: syz-executor204 Not tainted 5.10.0-syzkaller #0 [ 83.654783][ T8518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.666475][ T8518] Call Trace: [ 83.669893][ T8518] dump_stack+0x107/0x163 [ 83.674239][ T8518] panic+0x343/0x77f [ 83.678234][ T8518] ? __warn_printk+0xf3/0xf3 [ 83.683461][ T8518] ? __warn.cold+0x1a/0x44 [ 83.687899][ T8518] ? account_page_dirtied+0x787/0xa20 [ 83.694242][ T8518] __warn.cold+0x35/0x44 [ 83.698547][ T8518] ? account_page_dirtied+0x787/0xa20 [ 83.704057][ T8518] report_bug+0x1bd/0x210 [ 83.708422][ T8518] handle_bug+0x3c/0x60 [ 83.712771][ T8518] exc_invalid_op+0x14/0x40 [ 83.717392][ T8518] asm_exc_invalid_op+0x12/0x20 [ 83.722280][ T8518] RIP: 0010:account_page_dirtied+0x787/0xa20 [ 83.728271][ T8518] Code: a8 01 00 00 be ff ff ff ff 48 8d 78 70 e8 f1 4c 81 07 31 ff 89 c3 89 c6 e8 b6 cf d9 ff 85 db 0f 85 9c fa ff ff e8 89 c9 d9 ff <0f> 0b e9 90 fa ff ff e8 7d c9 d9 ff 48 89 ee 4c 89 ef e8 52 06 34 [ 83.748436][ T8518] RSP: 0018:ffffc90001b573d8 EFLAGS: 00010093 [ 83.754733][ T8518] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 83.763117][ T8518] RDX: ffff8880284de040 RSI: ffffffff81997c67 RDI: 0000000000000003 [ 83.771310][ T8518] RBP: ffffea000071e100 R08: 0000000000000000 R09: ffff888037fcdc3f [ 83.779462][ T8518] R10: ffffffff81997c5a R11: 0000000000000000 R12: ffff888037fcdc38 [ 83.787474][ T8518] R13: ffff888037fcda90 R14: ffff888037fcd8e0 R15: ffffea000071e108 [ 83.796758][ T8518] ? account_page_dirtied+0x77a/0xa20 [ 83.803366][ T8518] ? account_page_dirtied+0x787/0xa20 [ 83.808843][ T8518] ? account_page_dirtied+0x787/0xa20 [ 83.814328][ T8518] __set_page_dirty+0x7f/0x400 [ 83.819280][ T8518] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 83.825616][ T8518] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 83.831963][ T8518] mark_buffer_dirty+0x466/0x5f0 [ 83.837240][ T8518] nilfs_btree_convert_and_insert+0xdaf/0x1170 [ 83.843663][ T8518] ? nilfs_btree_last_key+0x5e0/0x5e0 [ 83.849841][ T8518] ? down_write_killable_nested+0x170/0x170 [ 83.855754][ T8518] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 83.861736][ T8518] ? nilfs_direct_gather_data+0xfe/0x160 [ 83.867670][ T8518] nilfs_bmap_insert+0x2a1/0x3f0 [ 83.873267][ T8518] ? nilfs_bmap_lookup_contig+0x180/0x180 [ 83.879355][ T8518] ? mark_page_accessed+0x273/0x1bd0 [ 83.884692][ T8518] nilfs_mdt_get_block+0x5bf/0xdb0 [ 83.889998][ T8518] ? nilfs_mdt_read_block+0x3f0/0x3f0 [ 83.895673][ T8518] ? do_raw_spin_lock+0x120/0x2b0 [ 83.900813][ T8518] ? rwlock_bug.part.0+0x90/0x90 [ 83.905775][ T8518] nilfs_palloc_get_block+0xc4/0x2b0 [ 83.911596][ T8518] nilfs_palloc_get_entry_block+0x167/0x1d0 [ 83.917641][ T8518] nilfs_dat_prepare_alloc+0x61/0xb0 [ 83.922950][ T8518] nilfs_direct_insert+0x3f2/0x530 [ 83.930097][ T8518] ? nilfs_direct_assign+0x440/0x440 [ 83.935701][ T8518] ? down_write_killable_nested+0x170/0x170 [ 83.941697][ T8518] nilfs_bmap_insert+0x27a/0x3f0 [ 83.947489][ T8518] ? nilfs_direct_last_key+0xf0/0xf0 [ 83.952973][ T8518] ? nilfs_bmap_lookup_contig+0x180/0x180 [ 83.958776][ T8518] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 83.965074][ T8518] ? trace_nilfs2_transaction_transition+0x1e5/0x260 [ 83.972156][ T8518] ? nilfs_transaction_begin+0x41d/0xa10 [ 83.978013][ T8518] nilfs_get_block+0x562/0xa50 [ 83.982872][ T8518] ? __nilfs_mark_inode_dirty+0x230/0x230 [ 83.989797][ T8518] ? create_empty_buffers+0x58f/0x820 [ 83.995337][ T8518] ? do_raw_spin_unlock+0x171/0x230 [ 84.000649][ T8518] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 84.007455][ T8518] ? __nilfs_mark_inode_dirty+0x230/0x230 [ 84.013198][ T8518] __block_write_begin_int+0x424/0x1770 [ 84.018783][ T8518] ? __nilfs_mark_inode_dirty+0x230/0x230 [ 84.024736][ T8518] ? __page_cache_alloc+0x10d/0x360 [ 84.030279][ T8518] ? remove_inode_buffers+0x1b0/0x1b0 [ 84.035775][ T8518] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 84.042027][ T8518] ? pagecache_get_page+0x23c/0x1460 [ 84.047695][ T8518] nilfs_make_empty+0x10a/0x820 [ 84.052804][ T8518] nilfs_mkdir+0x1e8/0x360 [ 84.057500][ T8518] ? nilfs_unlink+0x1c0/0x1c0 [ 84.062271][ T8518] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 84.073542][ T8518] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 84.079868][ T8518] vfs_mkdir+0x1b7/0x340 [ 84.084128][ T8518] ? security_path_mkdir+0x11b/0x160 [ 84.089432][ T8518] do_mkdirat+0x262/0x2d0 [ 84.093781][ T8518] ? user_path_create+0xf0/0xf0 [ 84.098652][ T8518] ? syscall_enter_from_user_mode+0x1d/0x50 [ 84.104648][ T8518] do_syscall_64+0x2d/0x70 [ 84.109166][ T8518] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 84.115069][ T8518] RIP: 0033:0x44b259 [ 84.119007][ T8518] Code: 7d cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 4b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 84.141135][ T8518] RSP: 002b:00007ff46ac0fd88 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 84.149620][ T8518] RAX: ffffffffffffffda RBX: 00000000006ddc28 RCX: 000000000044b259 [ 84.157797][ T8518] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 00000000ffffff9c [ 84.167274][ T8518] RBP: 00000000006ddc20 R08: 0000000000000000 R09: 0000000000000000 [ 84.177929][ T8518] R10: 0000000000000000 R11: 0000000000000246 R12: 000000005f671b56 [ 84.186001][ T8518] R13: 000000005f671b56 R14: 0000000000000000 R15: 0000000000000000 [ 84.195116][ T8518] Kernel Offset: disabled [ 84.200210][ T8518] Rebooting in 86400 seconds..