[ 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... [ 53.393790][ T6730] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6730 [ 53.403281][ T6730] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 53.409757][ T6730] CPU: 0 PID: 6730 Comm: systemd-rfkill Not tainted 5.7.0-syzkaller #0 [ 53.418006][ T6730] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.428260][ T6730] Call Trace: [ 53.431554][ T6730] dump_stack+0x18f/0x20d [ 53.435918][ T6730] check_preemption_disabled+0x20d/0x220 [ 53.435937][ T6730] ext4_mb_new_blocks+0xa4d/0x3b70 [ 53.447057][ T6730] ? ext4_ext_search_right+0x2ca/0xb20 [ 53.452522][ T6730] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 53.458259][ T6730] ext4_ext_map_blocks+0x201b/0x33e0 [ 53.463569][ T6730] ? ext4_ext_release+0x10/0x10 [ 53.468511][ T6730] ? down_write_killable+0x170/0x170 [ 53.473796][ T6730] ? ext4_es_lookup_extent+0x41d/0xd10 [[ 53.479259][ T6730] ext4_map_blocks+0x4cb/0x1640 [ 53.484175][ T6730] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 53.489380][ T6730] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 53.494929][ T6730] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 53.500902][ T6730] ? prandom_u32_state+0xe/0x170  OK [0[ 53.505836][ T6730] ? __brelse+0x84/0xa0 m] [ 53.511376][ T6730] ? __ext4_new_inode+0x144/0x55e0 [ 53.516734][ T6730] ext4_getblk+0xad/0x520 [ 53.521066][ T6730] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 53.526792][ T6730] ? ext4_free_inode+0x1700/0x1700 Started Update U[ 53.531931][ T6730] ext4_bread+0x7c/0x380 [ 53.537549][ T6730] ? ext4_getblk+0x520/0x520 [ 53.542138][ T6730] ? dquot_get_next_dqblk+0x180/0x180 TMP about System[ 53.547510][ T6730] ext4_append+0x153/0x360 Runlevel Change[ 53.553299][ T6730] ext4_mkdir+0x5e0/0xdf0 [ 53.559017][ T6730] ? ext4_rmdir+0xde0/0xde0 s. [ 53.563527][ T6730] ? security_inode_permission+0xc4/0xf0 [ 53.569520][ T6730] vfs_mkdir+0x419/0x690 [ 53.573762][ T6730] do_mkdirat+0x21e/0x280 [ 53.578102][ T6730] ? __ia32_sys_mknod+0xb0/0xb0 [ 53.582958][ T6730] ? do_syscall_64+0x1c/0xe0 [ 53.587544][ T6730] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 53.593505][ T6730] do_syscall_64+0x60/0xe0 [ 53.597918][ T6730] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.603803][ T6730] RIP: 0033:0x7fc2137f8687 [ 53.608191][ T6730] Code: Bad RIP value. [ 53.612235][ T6730] RSP: 002b:00007ffdc8d181c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 53.620620][ T6730] RAX: ffffffffffffffda RBX: 000055dacee02985 RCX: 00007fc2137f8687 [ 53.628584][ T6730] RDX: 00007ffdc8d18090 RSI: 00000000000001ed RDI: 000055dacee02985 [ 53.636556][ T6730] RBP: 00007fc2137f8680 R08: 0000000000000100 R09: 0000000000000000 [ 53.644512][ T6730] R10: 000055dacee02980 R11: 0000000000000246 R12: 00000000000001ed [ 53.652482][ T6730] R13: 00007ffdc8d18350 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 57.093323][ T675] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:4/675 [ 57.102511][ T675] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.108799][ T675] CPU: 1 PID: 675 Comm: kworker/u4:4 Not tainted 5.7.0-syzkaller #0 [ 57.116954][ T675] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.127002][ T675] Workqueue: writeback wb_workfn (flush-8:0) [ 57.132977][ T675] Call Trace: [ 57.136883][ T675] dump_stack+0x18f/0x20d [ 57.141195][ T675] check_preemption_disabled+0x20d/0x220 [ 57.146820][ T675] ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.151927][ T675] ? ext4_find_extent+0x81a/0xad0 [ 57.157130][ T675] ? ext4_ext_search_right+0x2ca/0xb20 [ 57.162567][ T675] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 57.168269][ T675] ext4_ext_map_blocks+0x201b/0x33e0 [ 57.174511][ T675] ? ext4_ext_release+0x10/0x10 [ 57.179347][ T675] ? down_write_killable+0x170/0x170 [ 57.184726][ T675] ? ext4_es_lookup_extent+0x41d/0xd10 [ 57.190165][ T675] ext4_map_blocks+0x4cb/0x1640 [ 57.195003][ T675] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 57.200208][ T675] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.206254][ T675] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.212209][ T675] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 57.217661][ T675] ext4_writepages+0x1a7b/0x33c0 [ 57.222603][ T675] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.228232][ T675] ? __lock_acquire+0x2224/0x48b0 [ 57.233258][ T675] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.239229][ T675] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.245196][ T675] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.250827][ T675] ? do_writepages+0xfa/0x2a0 [ 57.255486][ T675] do_writepages+0xfa/0x2a0 [ 57.259979][ T675] ? page_writeback_cpu_online+0x10/0x10 [ 57.265612][ T675] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.271224][ T675] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.277181][ T675] ? lock_downgrade+0x840/0x840 [ 57.282030][ T675] __writeback_single_inode+0x12a/0x13d0 [ 57.287642][ T675] ? _raw_spin_unlock+0x24/0x40 [ 57.292483][ T675] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 57.298455][ T675] writeback_sb_inodes+0x515/0xdc0 [ 57.303554][ T675] ? __writeback_single_inode+0x13d0/0x13d0 [ 57.309451][ T675] __writeback_inodes_wb+0xc3/0x250 [ 57.314632][ T675] wb_writeback+0x8db/0xd50 [ 57.319121][ T675] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 57.325428][ T675] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 57.331300][ T675] ? cpumask_next+0x3c/0x40 [ 57.336734][ T675] ? get_nr_dirty_inodes+0xd6/0x130 [ 57.341925][ T675] wb_workfn+0xab3/0x1090 [ 57.346248][ T675] ? inode_wait_for_writeback+0x30/0x30 [ 57.351774][ T675] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.357297][ T675] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.363279][ T675] process_one_work+0x965/0x1690 [ 57.368202][ T675] ? lock_release+0x800/0x800 [ 57.372967][ T675] ? pwq_dec_nr_in_flight+0x310/0x310 [ 57.378323][ T675] ? rwlock_bug.part.0+0x90/0x90 [ 57.383259][ T675] worker_thread+0x96/0xe10 [ 57.387747][ T675] ? process_one_work+0x1690/0x1690 [ 57.392943][ T675] kthread+0x3b5/0x4a0 [ 57.396988][ T675] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.402691][ T675] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.408404][ T675] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.15.193' (ECDSA) to the list of known hosts. 2020/06/14 19:26:08 fuzzer started 2020/06/14 19:26:08 connecting to host at 10.128.0.26:33555 2020/06/14 19:26:08 checking machine... 2020/06/14 19:26:08 checking revisions... 2020/06/14 19:26:08 testing simple program... [ 58.851640][ T6799] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6799 [ 58.860725][ T6799] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.866694][ T6799] CPU: 0 PID: 6799 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 58.874720][ T6799] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.884795][ T6799] Call Trace: [ 58.888070][ T6799] dump_stack+0x18f/0x20d [ 58.892398][ T6799] check_preemption_disabled+0x20d/0x220 [ 58.898015][ T6799] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.903127][ T6799] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.908574][ T6799] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.914284][ T6799] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.919559][ T6799] ? ext4_ext_release+0x10/0x10 [ 58.924407][ T6799] ? down_write_killable+0x170/0x170 [ 58.929705][ T6799] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.935145][ T6799] ext4_map_blocks+0x4cb/0x1640 [ 58.939978][ T6799] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.945155][ T6799] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.950702][ T6799] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.956663][ T6799] ? prandom_u32_state+0xe/0x170 [ 58.961580][ T6799] ? __brelse+0x84/0xa0 [ 58.965716][ T6799] ? __ext4_new_inode+0x144/0x55e0 [ 58.970970][ T6799] ext4_getblk+0xad/0x520 [ 58.975295][ T6799] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.980999][ T6799] ? ext4_free_inode+0x1700/0x1700 [ 58.986100][ T6799] ext4_bread+0x7c/0x380 [ 58.990357][ T6799] ? ext4_getblk+0x520/0x520 [ 58.994971][ T6799] ? dquot_get_next_dqblk+0x180/0x180 [ 59.000344][ T6799] ext4_append+0x153/0x360 [ 59.004754][ T6799] ext4_mkdir+0x5e0/0xdf0 [ 59.009090][ T6799] ? ext4_rmdir+0xde0/0xde0 [ 59.013578][ T6799] ? security_inode_permission+0xc4/0xf0 [ 59.019200][ T6799] vfs_mkdir+0x419/0x690 [ 59.023426][ T6799] do_mkdirat+0x21e/0x280 [ 59.027734][ T6799] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.032589][ T6799] ? do_syscall_64+0x1c/0xe0 [ 59.037173][ T6799] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.043148][ T6799] do_syscall_64+0x60/0xe0 [ 59.047560][ T6799] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.053430][ T6799] RIP: 0033:0x4b02a0 [ 59.057295][ T6799] Code: Bad RIP value. [ 59.061334][ T6799] RSP: 002b:000000c0000e94b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 59.069734][ T6799] RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004b02a0 [ 59.077697][ T6799] RDX: 00000000000001c0 RSI: 000000c000026cc0 RDI: ffffffffffffff9c [ 59.085645][ T6799] RBP: 000000c0000e9510 R08: 0000000000000000 R09: 0000000000000000 [ 59.093620][ T6799] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 59.101573][ T6799] R13: 0000000000000067 R14: 0000000000000066 R15: 0000000000000100 [ 59.116882][ T6817] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6817 [ 59.126419][ T6817] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.132410][ T6817] CPU: 0 PID: 6817 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.141839][ T6817] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.151872][ T6817] Call Trace: [ 59.155149][ T6817] dump_stack+0x18f/0x20d [ 59.159480][ T6817] check_preemption_disabled+0x20d/0x220 [ 59.165136][ T6817] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.170300][ T6817] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.175745][ T6817] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.181451][ T6817] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.186730][ T6817] ? ext4_ext_release+0x10/0x10 [ 59.191569][ T6817] ? down_write_killable+0x170/0x170 [ 59.196866][ T6817] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.202660][ T6817] ext4_map_blocks+0x4cb/0x1640 [ 59.207496][ T6817] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.212675][ T6817] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.218199][ T6817] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.224157][ T6817] ? prandom_u32_state+0xe/0x170 [ 59.229073][ T6817] ? __brelse+0x84/0xa0 [ 59.233204][ T6817] ? __ext4_new_inode+0x144/0x55e0 [ 59.238313][ T6817] ext4_getblk+0xad/0x520 [ 59.242640][ T6817] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.248340][ T6817] ? ext4_free_inode+0x1700/0x1700 [ 59.253430][ T6817] ext4_bread+0x7c/0x380 [ 59.257652][ T6817] ? ext4_getblk+0x520/0x520 [ 59.262225][ T6817] ? dquot_get_next_dqblk+0x180/0x180 [ 59.268301][ T6817] ext4_append+0x153/0x360 [ 59.272701][ T6817] ext4_mkdir+0x5e0/0xdf0 [ 59.277379][ T6817] ? ext4_rmdir+0xde0/0xde0 [ 59.281866][ T6817] ? security_inode_permission+0xc4/0xf0 [ 59.287633][ T6817] vfs_mkdir+0x419/0x690 [ 59.291856][ T6817] do_mkdirat+0x21e/0x280 [ 59.296169][ T6817] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.301025][ T6817] ? do_syscall_64+0x1c/0xe0 [ 59.305605][ T6817] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.311566][ T6817] do_syscall_64+0x60/0xe0 [ 59.315990][ T6817] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.321944][ T6817] RIP: 0033:0x45bee7 [ 59.325908][ T6817] Code: Bad RIP value. [ 59.329964][ T6817] RSP: 002b:00007ffe970ea348 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 59.338376][ T6817] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 59.346350][ T6817] RDX: 0000000000000002 RSI: 00000000000001c0 RDI: 00007ffe970ea520 [ 59.354302][ T6817] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000002980 [ 59.362263][ T6817] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 59.370222][ T6817] R13: 00007ffe970ea520 R14: 8421084210842109 R15: 00007ffe970ea52c [ 59.454940][ T6818] IPVS: ftp: loaded support on port[0] = 21 [ 59.492021][ T6818] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6818 [ 59.501536][ T6818] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.507640][ T6818] CPU: 1 PID: 6818 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.515871][ T6818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.525903][ T6818] Call Trace: [ 59.529201][ T6818] dump_stack+0x18f/0x20d [ 59.533512][ T6818] check_preemption_disabled+0x20d/0x220 [ 59.539127][ T6818] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.544235][ T6818] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.549670][ T6818] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.555542][ T6818] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.560807][ T6818] ? ext4_ext_release+0x10/0x10 [ 59.565651][ T6818] ? down_write_killable+0x170/0x170 [ 59.570912][ T6818] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.576352][ T6818] ext4_map_blocks+0x4cb/0x1640 [ 59.581195][ T6818] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.586369][ T6818] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.591887][ T6818] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.598014][ T6818] ? prandom_u32_state+0xe/0x170 [ 59.602929][ T6818] ? __brelse+0x84/0xa0 [ 59.607059][ T6818] ? __ext4_new_inode+0x144/0x55e0 [ 59.612147][ T6818] ext4_getblk+0xad/0x520 [ 59.616473][ T6818] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.622170][ T6818] ? ext4_free_inode+0x1700/0x1700 [ 59.627259][ T6818] ext4_bread+0x7c/0x380 [ 59.631481][ T6818] ? ext4_getblk+0x520/0x520 [ 59.636047][ T6818] ? dquot_get_next_dqblk+0x180/0x180 [ 59.641397][ T6818] ext4_append+0x153/0x360 [ 59.645809][ T6818] ext4_mkdir+0x5e0/0xdf0 [ 59.650135][ T6818] ? ext4_rmdir+0xde0/0xde0 [ 59.654615][ T6818] ? security_inode_permission+0xc4/0xf0 [ 59.660235][ T6818] vfs_mkdir+0x419/0x690 [ 59.664455][ T6818] do_mkdirat+0x21e/0x280 [ 59.668784][ T6818] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.673611][ T6818] ? do_syscall_64+0x1c/0xe0 [ 59.678178][ T6818] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.684133][ T6818] do_syscall_64+0x60/0xe0 [ 59.688525][ T6818] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.694392][ T6818] RIP: 0033:0x45bee7 [ 59.698256][ T6818] Code: Bad RIP value. [ 59.702390][ T6818] RSP: 002b:00007ffe970ea238 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 59.710945][ T6818] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 59.718892][ T6818] RDX: 00007ffe970ea283 RSI: 00000000000001ff RDI: 00007ffe970ea280 [ 59.726856][ T6818] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 59.734805][ T6818] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185d0 [ 59.742755][ T6818] R13: 00007ffe970ea270 R14: 0000000000000000 R15: 00007ffe970ea280 [ 59.790983][ T6818] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6818 [ 59.800813][ T6818] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.806824][ T6818] CPU: 0 PID: 6818 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.815238][ T6818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.825293][ T6818] Call Trace: [ 59.828592][ T6818] dump_stack+0x18f/0x20d [ 59.832941][ T6818] check_preemption_disabled+0x20d/0x220 [ 59.838666][ T6818] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.843813][ T6818] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.849283][ T6818] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.855020][ T6818] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.860316][ T6818] ? ext4_ext_release+0x10/0x10 [ 59.865178][ T6818] ? down_write_killable+0x170/0x170 [ 59.870444][ T6818] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.875904][ T6818] ext4_map_blocks+0x4cb/0x1640 [ 59.880753][ T6818] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.885935][ T6818] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.891458][ T6818] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.897427][ T6818] ? prandom_u32_state+0xe/0x170 [ 59.902364][ T6818] ? __brelse+0x84/0xa0 [ 59.906624][ T6818] ? __ext4_new_inode+0x144/0x55e0 [ 59.911734][ T6818] ext4_getblk+0xad/0x520 [ 59.916066][ T6818] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.921799][ T6818] ? ext4_free_inode+0x1700/0x1700 [ 59.926894][ T6818] ext4_bread+0x7c/0x380 [ 59.931118][ T6818] ? ext4_getblk+0x520/0x520 [ 59.935710][ T6818] ? dquot_get_next_dqblk+0x180/0x180 [ 59.941075][ T6818] ext4_append+0x153/0x360 [ 59.945484][ T6818] ext4_mkdir+0x5e0/0xdf0 [ 59.949824][ T6818] ? ext4_rmdir+0xde0/0xde0 [ 59.954317][ T6818] ? security_inode_permission+0xc4/0xf0 [ 59.959940][ T6818] vfs_mkdir+0x419/0x690 [ 59.964298][ T6818] do_mkdirat+0x21e/0x280 [ 59.968618][ T6818] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.973588][ T6818] ? do_syscall_64+0x1c/0xe0 [ 59.978164][ T6818] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.984148][ T6818] do_syscall_64+0x60/0xe0 2020/06/14 19:26:10 building call list... [ 59.988565][ T6818] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.994531][ T6818] RIP: 0033:0x45bee7 [ 59.998404][ T6818] Code: Bad RIP value. [ 60.002459][ T6818] RSP: 002b:00007ffe970ea238 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 60.011208][ T6818] RAX: ffffffffffffffda RBX: 000000000000e98d RCX: 000000000045bee7 [ 60.019158][ T6818] RDX: 00007ffe970ea283 RSI: 00000000000001ff RDI: 00007ffe970ea280 [ 60.027134][ T6818] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 60.035105][ T6818] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 60.043125][ T6818] R13: 00007ffe970ea270 R14: 000000000000e97d R15: 00007ffe970ea280 [ 60.322033][ T3517] tipc: TX() has been purged, node left! [ 60.824126][ T3517] ================================================================== [ 60.832356][ T3517] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 60.840329][ T3517] Write of size 1 at addr ffff88809deb81e4 by task kworker/u4:5/3517 [ 60.848376][ T3517] [ 60.850708][ T3517] CPU: 0 PID: 3517 Comm: kworker/u4:5 Not tainted 5.7.0-syzkaller #0 [ 60.858849][ T3517] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.868907][ T3517] Workqueue: netns cleanup_net [ 60.873665][ T3517] Call Trace: [ 60.877494][ T3517] dump_stack+0x18f/0x20d [ 60.881824][ T3517] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.887449][ T3517] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.892991][ T3517] ? afs_put_call+0xa40/0xa40 [ 60.897670][ T3517] print_address_description.constprop.0.cold+0xd3/0x413 [ 60.905216][ T3517] ? vprintk_func+0x97/0x1a6 [ 60.910252][ T3517] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.915826][ T3517] kasan_report.cold+0x1f/0x37 [ 60.920589][ T3517] ? rcu_read_lock_held+0x81/0xb0 [ 60.925610][ T3517] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.931156][ T3517] afs_wake_up_async_call+0x6aa/0x770 [ 60.936524][ T3517] ? afs_close_socket+0x320/0x320 [ 60.941554][ T3517] ? afs_put_call+0xa40/0xa40 [ 60.946229][ T3517] rxrpc_notify_socket+0x1db/0x5d0 [ 60.951343][ T3517] ? afs_put_call+0xa40/0xa40 [ 60.956137][ T3517] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 60.962636][ T3517] rxrpc_call_completed+0xca/0xf0 [ 60.967846][ T3517] rxrpc_discard_prealloc+0x781/0xab0 [ 60.973220][ T3517] ? lock_sock_nested+0x94/0x110 [ 60.978158][ T3517] rxrpc_listen+0x147/0x360 [ 60.982663][ T3517] afs_close_socket+0x95/0x320 [ 60.987440][ T3517] ? afs_purge_servers+0x16d/0x300 [ 60.992570][ T3517] ? afs_rx_discard_new_call+0x50/0x50 [ 60.998051][ T3517] ? init_wait_var_entry+0x200/0x200 [ 61.003354][ T3517] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.009003][ T3517] ? check_preemption_disabled+0x38/0x220 [ 61.014741][ T3517] afs_net_exit+0x1bc/0x310 [ 61.019247][ T3517] ? afs_net_init+0xe30/0xe30 [ 61.023924][ T3517] ops_exit_list.isra.0+0xa8/0x150 [ 61.030015][ T3517] cleanup_net+0x511/0xa50 [ 61.034450][ T3517] ? unregister_pernet_device+0x70/0x70 [ 61.040311][ T3517] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.046306][ T3517] process_one_work+0x965/0x1690 [ 61.051274][ T3517] ? lock_release+0x800/0x800 [ 61.055960][ T3517] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.061339][ T3517] ? rwlock_bug.part.0+0x90/0x90 [ 61.066294][ T3517] worker_thread+0x96/0xe10 [ 61.070812][ T3517] ? process_one_work+0x1690/0x1690 [ 61.076012][ T3517] kthread+0x3b5/0x4a0 [ 61.080077][ T3517] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.085790][ T3517] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.091514][ T3517] ret_from_fork+0x1f/0x30 [ 61.095941][ T3517] [ 61.098263][ T3517] Allocated by task 6818: [ 61.102600][ T3517] save_stack+0x1b/0x40 [ 61.106755][ T3517] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.112386][ T3517] kmem_cache_alloc_trace+0x153/0x7d0 [ 61.117752][ T3517] afs_alloc_call+0x55/0x630 [ 61.122337][ T3517] afs_charge_preallocation+0xe9/0x2d0 [ 61.127790][ T3517] afs_open_socket+0x292/0x360 [ 61.132557][ T3517] afs_net_init+0xa6c/0xe30 [ 61.137051][ T3517] ops_init+0xaf/0x420 [ 61.141112][ T3517] setup_net+0x2de/0x860 [ 61.145345][ T3517] copy_net_ns+0x293/0x590 [ 61.149755][ T3517] create_new_namespaces+0x3fb/0xb30 [ 61.155035][ T3517] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 61.161966][ T3517] ksys_unshare+0x43d/0x8e0 [ 61.166464][ T3517] __x64_sys_unshare+0x2d/0x40 [ 61.171234][ T3517] do_syscall_64+0x60/0xe0 [ 61.175673][ T3517] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.181585][ T3517] [ 61.183909][ T3517] Freed by task 3517: [ 61.187890][ T3517] save_stack+0x1b/0x40 [ 61.192042][ T3517] __kasan_slab_free+0xf7/0x140 [ 61.196888][ T3517] kfree+0x109/0x2b0 [ 61.200778][ T3517] afs_put_call+0x585/0xa40 [ 61.205279][ T3517] rxrpc_discard_prealloc+0x764/0xab0 [ 61.210733][ T3517] rxrpc_listen+0x147/0x360 [ 61.215331][ T3517] afs_close_socket+0x95/0x320 [ 61.220095][ T3517] afs_net_exit+0x1bc/0x310 [ 61.224593][ T3517] ops_exit_list.isra.0+0xa8/0x150 [ 61.229699][ T3517] cleanup_net+0x511/0xa50 [ 61.234113][ T3517] process_one_work+0x965/0x1690 [ 61.239047][ T3517] worker_thread+0x96/0xe10 [ 61.243545][ T3517] kthread+0x3b5/0x4a0 [ 61.247636][ T3517] ret_from_fork+0x1f/0x30 [ 61.252039][ T3517] [ 61.254375][ T3517] The buggy address belongs to the object at ffff88809deb8000 [ 61.254375][ T3517] which belongs to the cache kmalloc-1k of size 1024 [ 61.268472][ T3517] The buggy address is located 484 bytes inside of [ 61.268472][ T3517] 1024-byte region [ffff88809deb8000, ffff88809deb8400) [ 61.281839][ T3517] The buggy address belongs to the page: [ 61.287904][ T3517] page:ffffea000277ae00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 61.297004][ T3517] flags: 0xfffe0000000200(slab) [ 61.301876][ T3517] raw: 00fffe0000000200 ffffea0002881408 ffffea0002606dc8 ffff8880aa000c40 [ 61.310459][ T3517] raw: 0000000000000000 ffff88809deb8000 0000000100000002 0000000000000000 [ 61.319032][ T3517] page dumped because: kasan: bad access detected [ 61.325443][ T3517] [ 61.327768][ T3517] Memory state around the buggy address: [ 61.333428][ T3517] ffff88809deb8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.341489][ T3517] ffff88809deb8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.349554][ T3517] >ffff88809deb8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.357642][ T3517] ^ [ 61.364833][ T3517] ffff88809deb8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.372892][ T3517] ffff88809deb8280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.380943][ T3517] ================================================================== [ 61.388995][ T3517] Disabling lock debugging due to kernel taint [ 61.395186][ T3517] Kernel panic - not syncing: panic_on_warn set ... [ 61.401801][ T3517] CPU: 0 PID: 3517 Comm: kworker/u4:5 Tainted: G B 5.7.0-syzkaller #0 [ 61.412193][ T3517] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.422250][ T3517] Workqueue: netns cleanup_net [ 61.427082][ T3517] Call Trace: [ 61.430364][ T3517] dump_stack+0x18f/0x20d [ 61.434686][ T3517] ? afs_wake_up_async_call+0x5f0/0x770 [ 61.440222][ T3517] ? afs_put_call+0xa40/0xa40 [ 61.444886][ T3517] panic+0x2e3/0x75c [ 61.448771][ T3517] ? __warn_printk+0xf3/0xf3 [ 61.453361][ T3517] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 61.459505][ T3517] ? trace_hardirqs_on+0x55/0x220 [ 61.464518][ T3517] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.470045][ T3517] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.475574][ T3517] ? afs_put_call+0xa40/0xa40 [ 61.480257][ T3517] end_report+0x4d/0x53 [ 61.484411][ T3517] kasan_report.cold+0xd/0x37 [ 61.489078][ T3517] ? rcu_read_lock_held+0x81/0xb0 [ 61.494789][ T3517] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.500321][ T3517] afs_wake_up_async_call+0x6aa/0x770 [ 61.505681][ T3517] ? afs_close_socket+0x320/0x320 [ 61.510691][ T3517] ? afs_put_call+0xa40/0xa40 [ 61.515362][ T3517] rxrpc_notify_socket+0x1db/0x5d0 [ 61.520463][ T3517] ? afs_put_call+0xa40/0xa40 [ 61.525128][ T3517] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.531531][ T3517] rxrpc_call_completed+0xca/0xf0 [ 61.536547][ T3517] rxrpc_discard_prealloc+0x781/0xab0 [ 61.541914][ T3517] ? lock_sock_nested+0x94/0x110 [ 61.546864][ T3517] rxrpc_listen+0x147/0x360 [ 61.551362][ T3517] afs_close_socket+0x95/0x320 [ 61.556121][ T3517] ? afs_purge_servers+0x16d/0x300 [ 61.561224][ T3517] ? afs_rx_discard_new_call+0x50/0x50 [ 61.566678][ T3517] ? init_wait_var_entry+0x200/0x200 [ 61.571956][ T3517] ? rcu_read_lock_held_common+0xa0/0xa0 executing program [ 61.577590][ T3517] ? check_preemption_disabled+0x38/0x220 [ 61.583307][ T3517] afs_net_exit+0x1bc/0x310 [ 61.587830][ T3517] ? afs_net_init+0xe30/0xe30 [ 61.592502][ T3517] ops_exit_list.isra.0+0xa8/0x150 [ 61.597614][ T3517] cleanup_net+0x511/0xa50 [ 61.602030][ T3517] ? unregister_pernet_device+0x70/0x70 [ 61.607581][ T3517] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.613563][ T3517] process_one_work+0x965/0x1690 [ 61.618489][ T3517] ? lock_release+0x800/0x800 [ 61.623154][ T3517] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.628516][ T3517] ? rwlock_bug.part.0+0x90/0x90 [ 61.633583][ T3517] worker_thread+0x96/0xe10 [ 61.638088][ T3517] ? process_one_work+0x1690/0x1690 [ 61.643280][ T3517] kthread+0x3b5/0x4a0 [ 61.647349][ T3517] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.653065][ T3517] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.658781][ T3517] ret_from_fork+0x1f/0x30 [ 61.663791][ T3517] Kernel Offset: disabled [ 61.668165][ T3517] Rebooting in 86400 seconds..