[ OK ] Started Getty on tty4. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ 58.324374][ T6759] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6759 [ 58.333936][ T6759] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.339822][ T6759] CPU: 1 PID: 6759 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 58.348406][ T6759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.358455][ T6759] Call Trace: [ 58.361743][ T6759] dump_stack+0x18f/0x20d [ 58.366073][ T6759] check_preemption_disabled+0x20d/0x220 [ 58.371684][ T6759] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.377561][ T6759] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.382554][ T4173] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:5/4173 [ 58.383027][ T6759] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.392285][ T4173] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.397910][ T6759] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.409056][ T6759] ? ext4_ext_release+0x10/0x10 [ 58.413909][ T6759] ? down_write_killable+0x170/0x170 [ 58.419177][ T6759] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.424635][ T6759] ext4_map_blocks+0x4cb/0x1640 [ 58.429477][ T6759] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.434666][ T6759] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.440196][ T6759] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.446161][ T6759] ? prandom_u32_state+0xe/0x170 [ 58.451083][ T6759] ? __brelse+0x84/0xa0 [ 58.455221][ T6759] ? __ext4_new_inode+0x144/0x55e0 [ 58.460318][ T6759] ext4_getblk+0xad/0x520 [ 58.464633][ T6759] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.470360][ T6759] ? ext4_free_inode+0x1700/0x1700 [ 58.475460][ T6759] ext4_bread+0x7c/0x380 [ 58.479781][ T6759] ? ext4_getblk+0x520/0x520 [ 58.484369][ T6759] ? dquot_get_next_dqblk+0x180/0x180 [ 58.489776][ T6759] ext4_append+0x153/0x360 [ 58.494193][ T6759] ext4_mkdir+0x5e0/0xdf0 [ 58.498516][ T6759] ? ext4_rmdir+0xde0/0xde0 [ 58.503018][ T6759] ? security_inode_permission+0xc4/0xf0 [ 58.508641][ T6759] vfs_mkdir+0x419/0x690 [ 58.512884][ T6759] do_mkdirat+0x21e/0x280 [ 58.517198][ T6759] ? __ia32_sys_mknod+0xb0/0xb0 [ 58.522032][ T6759] ? do_syscall_64+0x1c/0xe0 [ 58.526637][ T6759] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.532601][ T6759] do_syscall_64+0x60/0xe0 [ 58.537004][ T6759] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.542877][ T6759] RIP: 0033:0x7f6ec4a33687 [ 58.547278][ T6759] Code: Bad RIP value. [ 58.551324][ T6759] RSP: 002b:00007ffcec175be8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 58.559715][ T6759] RAX: ffffffffffffffda RBX: 000055f2104f8985 RCX: 00007f6ec4a33687 [ 58.567687][ T6759] RDX: 00007ffcec175ab0 RSI: 00000000000001ed RDI: 000055f2104f8985 [ 58.575670][ T6759] RBP: 00007f6ec4a33680 R08: 0000000000000100 R09: 0000000000000000 [ 58.583631][ T6759] R10: 000055f2104f8980 R11: 0000000000000246 R12: 00000000000001ed [ 58.591599][ T6759] R13: 00007ffcec175d70 R14: 0000000000000000 R15: 0000000000000000 [ 58.599588][ T4173] CPU: 0 PID: 4173 Comm: kworker/u4:5 Not tainted 5.8.0-rc1-syzkaller #0 [ 58.608006][ T4173] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.618075][ T4173] Workqueue: writeback wb_workfn (flush-8:0) [ 58.624057][ T4173] Call Trace: [ 58.627354][ T4173] dump_stack+0x18f/0x20d [ 58.631700][ T4173] check_preemption_disabled+0x20d/0x220 [ 58.637344][ T4173] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.642467][ T4173] ? ext4_find_extent+0x81a/0xad0 [ 58.647510][ T4173] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.652979][ T4173] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.658786][ T4173] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.664074][ T4173] ? ext4_ext_release+0x10/0x10 [ 58.668916][ T4173] ? down_write_killable+0x170/0x170 [ 58.674177][ T4173] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.679623][ T4173] ext4_map_blocks+0x4cb/0x1640 [ 58.684473][ T4173] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.689678][ T4173] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.695260][ T4173] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.701230][ T4173] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.706679][ T4173] ext4_writepages+0x1a7b/0x33c0 [ 58.711615][ T4173] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.717227][ T4173] ? __lock_acquire+0x2224/0x48b0 [ 58.722263][ T4173] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.728223][ T4173] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.734181][ T4173] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.739789][ T4173] ? do_writepages+0xfa/0x2a0 [ 58.744442][ T4173] do_writepages+0xfa/0x2a0 [ 58.748950][ T4173] ? page_writeback_cpu_online+0x10/0x10 [ 58.754564][ T4173] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.760100][ T4173] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.766055][ T4173] ? lock_downgrade+0x840/0x840 [ 58.770897][ T4173] __writeback_single_inode+0x12a/0x13d0 [ 58.776523][ T4173] ? _raw_spin_unlock+0x24/0x40 [ 58.781348][ T4173] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 58.787329][ T4173] writeback_sb_inodes+0x515/0xdc0 [ 58.792451][ T4173] ? __writeback_single_inode+0x13d0/0x13d0 [ 58.798332][ T4173] __writeback_inodes_wb+0xc3/0x250 [ 58.803541][ T4173] wb_writeback+0x8db/0xd50 [ 58.808278][ T4173] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 58.808298][ T4173] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 58.808321][ T4173] ? cpumask_next+0x3c/0x40 [ 58.825031][ T4173] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.830231][ T4173] wb_workfn+0xab3/0x1090 [ 58.834591][ T4173] ? inode_wait_for_writeback+0x30/0x30 [ 58.840213][ T4173] ? rcu_read_lock_sched_held+0x9c/0xd0 [[ 58.845784][ T4173] ? rcu_read_lock_any_held.part.0+0x50/0x50  OK [0[ 58.851823][ T4173] process_one_work+0x965/0x1690 [ 58.858156][ T4173] ? lock_release+0x800/0x800 [ 58.862854][ T4173] ? pwq_dec_nr_in_flight+0x310/0x310 m] [ 58.868276][ T4173] ? rwlock_bug.part.0+0x90/0x90 [ 58.873506][ T4173] worker_thread+0x96/0xe10 [ 58.878022][ T4173] ? process_one_work+0x1690/0x1690 [ 58.883220][ T4173] kthread+0x3b5/0x4a0 Started Load/Sav[ 58.887285][ T4173] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.894405][ T4173] ? kthread_mod_delayed_work+0x1a0/0x1a0 e RF Kill Switch[ 58.900138][ T4173] ret_from_fork+0x1f/0x30 Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.54' (ECDSA) to the list of known hosts. 2020/06/16 07:51:17 fuzzer started 2020/06/16 07:51:17 connecting to host at 10.128.0.26:32851 2020/06/16 07:51:17 checking machine... 2020/06/16 07:51:17 checking revisions... 2020/06/16 07:51:17 testing simple program... syzkaller login: [ 63.474305][ T6818] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6818 [ 63.483386][ T6818] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.489539][ T6818] CPU: 0 PID: 6818 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 63.497782][ T6818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.507834][ T6818] Call Trace: [ 63.511157][ T6818] dump_stack+0x18f/0x20d [ 63.515561][ T6818] check_preemption_disabled+0x20d/0x220 [ 63.521176][ T6818] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.526296][ T6818] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.531740][ T6818] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.537442][ T6818] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.542709][ T6818] ? ext4_ext_release+0x10/0x10 [ 63.547544][ T6818] ? down_write_killable+0x170/0x170 [ 63.552809][ T6818] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.558248][ T6818] ext4_map_blocks+0x4cb/0x1640 [ 63.563082][ T6818] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.568255][ T6818] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.573780][ T6818] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.579751][ T6818] ? prandom_u32_state+0xe/0x170 [ 63.584667][ T6818] ? __brelse+0x84/0xa0 [ 63.588842][ T6818] ? __ext4_new_inode+0x144/0x55e0 [ 63.593934][ T6818] ext4_getblk+0xad/0x520 [ 63.598244][ T6818] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.603944][ T6818] ? ext4_free_inode+0x1700/0x1700 [ 63.609034][ T6818] ext4_bread+0x7c/0x380 [ 63.613313][ T6818] ? ext4_getblk+0x520/0x520 [ 63.617879][ T6818] ? dquot_get_next_dqblk+0x180/0x180 [ 63.623232][ T6818] ext4_append+0x153/0x360 [ 63.627627][ T6818] ext4_mkdir+0x5e0/0xdf0 [ 63.631938][ T6818] ? ext4_rmdir+0xde0/0xde0 [ 63.636439][ T6818] ? security_inode_permission+0xc4/0xf0 [ 63.642066][ T6818] vfs_mkdir+0x419/0x690 [ 63.646306][ T6818] do_mkdirat+0x21e/0x280 [ 63.650660][ T6818] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.655626][ T6818] ? do_syscall_64+0x1c/0xe0 [ 63.660213][ T6818] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.666203][ T6818] do_syscall_64+0x60/0xe0 [ 63.670629][ T6818] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.676522][ T6818] RIP: 0033:0x4b02a0 [ 63.680406][ T6818] Code: Bad RIP value. [ 63.684466][ T6818] RSP: 002b:000000c0000e74b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 63.692881][ T6818] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 63.700855][ T6818] RDX: 00000000000001c0 RSI: 000000c000026b00 RDI: ffffffffffffff9c [ 63.708827][ T6818] RBP: 000000c0000e7510 R08: 0000000000000000 R09: 0000000000000000 [ 63.716801][ T6818] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 63.724775][ T6818] R13: 0000000000000059 R14: 0000000000000058 R15: 0000000000000100 [ 63.760117][ T6833] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6833 [ 63.770078][ T6833] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.776035][ T6833] CPU: 1 PID: 6833 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 63.784616][ T6833] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.794687][ T6833] Call Trace: [ 63.797958][ T6833] dump_stack+0x18f/0x20d [ 63.802283][ T6833] check_preemption_disabled+0x20d/0x220 [ 63.807904][ T6833] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.813013][ T6833] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.818535][ T6833] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.824364][ T6833] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.829644][ T6833] ? ext4_ext_release+0x10/0x10 [ 63.834507][ T6833] ? down_write_killable+0x170/0x170 [ 63.839782][ T6833] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.845226][ T6833] ext4_map_blocks+0x4cb/0x1640 [ 63.850089][ T6833] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.855281][ T6833] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.860810][ T6833] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.866769][ T6833] ? prandom_u32_state+0xe/0x170 [ 63.871698][ T6833] ? __brelse+0x84/0xa0 [ 63.875832][ T6833] ? __ext4_new_inode+0x144/0x55e0 [ 63.880957][ T6833] ext4_getblk+0xad/0x520 [ 63.885430][ T6833] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.891139][ T6833] ? ext4_free_inode+0x1700/0x1700 [ 63.896287][ T6833] ext4_bread+0x7c/0x380 [ 63.900529][ T6833] ? ext4_getblk+0x520/0x520 [ 63.905106][ T6833] ? dquot_get_next_dqblk+0x180/0x180 [ 63.910471][ T6833] ext4_append+0x153/0x360 [ 63.914869][ T6833] ext4_mkdir+0x5e0/0xdf0 [ 63.919180][ T6833] ? ext4_rmdir+0xde0/0xde0 [ 63.923678][ T6833] ? security_inode_permission+0xc4/0xf0 [ 63.929316][ T6833] vfs_mkdir+0x419/0x690 [ 63.933553][ T6833] do_mkdirat+0x21e/0x280 [ 63.937860][ T6833] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.942690][ T6833] ? do_syscall_64+0x1c/0xe0 [ 63.947268][ T6833] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.953234][ T6833] do_syscall_64+0x60/0xe0 [ 63.957639][ T6833] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.963517][ T6833] RIP: 0033:0x45bed7 [ 63.967403][ T6833] Code: Bad RIP value. [ 63.971443][ T6833] RSP: 002b:00007ffd4e1796f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 63.979831][ T6833] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 63.987878][ T6833] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffd4e1798d0 [ 63.995828][ T6833] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 00000000000039c0 [ 64.007374][ T6833] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 64.015365][ T6833] R13: 00007ffd4e1798d0 R14: 8421084210842109 R15: 00007ffd4e1798dc [ 64.032822][ T43] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:3/43 [ 64.041923][ T43] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.047840][ T43] CPU: 0 PID: 43 Comm: kworker/u4:3 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.056081][ T43] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.066149][ T43] Workqueue: writeback wb_workfn (flush-8:0) [ 64.072271][ T43] Call Trace: [ 64.075566][ T43] dump_stack+0x18f/0x20d [ 64.079908][ T43] check_preemption_disabled+0x20d/0x220 [ 64.085553][ T43] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.090676][ T43] ? ext4_find_extent+0x81a/0xad0 [ 64.095718][ T43] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.101182][ T43] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.106912][ T43] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.112227][ T43] ? ext4_ext_release+0x10/0x10 [ 64.117141][ T43] ? down_write_killable+0x170/0x170 [ 64.122430][ T43] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.127902][ T43] ext4_map_blocks+0x4cb/0x1640 [ 64.132797][ T43] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.138008][ T43] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.143560][ T43] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.148451][ T6834] IPVS: ftp: loaded support on port[0] = 21 [ 64.149912][ T43] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.161288][ T43] ext4_writepages+0x1a7b/0x33c0 [ 64.166641][ T43] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.172456][ T43] ? __lock_acquire+0x2224/0x48b0 [ 64.177536][ T43] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.183545][ T43] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.189534][ T43] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.195169][ T43] ? do_writepages+0xfa/0x2a0 [ 64.197417][ T6834] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6834 [ 64.199856][ T43] do_writepages+0xfa/0x2a0 [ 64.209298][ T6834] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.213683][ T43] ? page_writeback_cpu_online+0x10/0x10 [ 64.213709][ T43] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.213727][ T43] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.213749][ T43] ? lock_downgrade+0x840/0x840 [ 64.241516][ T43] __writeback_single_inode+0x12a/0x13d0 [ 64.247136][ T43] ? _raw_spin_unlock+0x24/0x40 [ 64.251986][ T43] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.257961][ T43] writeback_sb_inodes+0x515/0xdc0 [ 64.263069][ T43] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.268966][ T43] __writeback_inodes_wb+0xc3/0x250 [ 64.274169][ T43] wb_writeback+0x8db/0xd50 [ 64.278665][ T43] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.284983][ T43] ? cpumask_next+0x3c/0x40 [ 64.289481][ T43] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.294670][ T43] wb_workfn+0x9bc/0x1090 [ 64.298997][ T43] ? inode_wait_for_writeback+0x30/0x30 [ 64.304534][ T43] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.310065][ T43] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.316033][ T43] process_one_work+0x965/0x1690 [ 64.320965][ T43] ? lock_release+0x800/0x800 [ 64.325627][ T43] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.331003][ T43] ? rwlock_bug.part.0+0x90/0x90 [ 64.335930][ T43] worker_thread+0x96/0xe10 [ 64.340869][ T43] ? process_one_work+0x1690/0x1690 [ 64.346067][ T43] kthread+0x3b5/0x4a0 [ 64.350120][ T43] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.355834][ T43] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.361540][ T43] ret_from_fork+0x1f/0x30 [ 64.365958][ T6834] CPU: 1 PID: 6834 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.374552][ T6834] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.384604][ T6834] Call Trace: [ 64.387899][ T6834] dump_stack+0x18f/0x20d [ 64.392239][ T6834] check_preemption_disabled+0x20d/0x220 [ 64.396260][ T43] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:3/43 [ 64.397881][ T6834] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.397914][ T6834] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.407176][ T43] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.412304][ T6834] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.412329][ T6834] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.412356][ T6834] ? ext4_ext_release+0x10/0x10 [ 64.412393][ T6834] ? down_write_killable+0x170/0x170 [ 64.444782][ T6834] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.450231][ T6834] ext4_map_blocks+0x4cb/0x1640 [ 64.455073][ T6834] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.460256][ T6834] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.465787][ T6834] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.471748][ T6834] ? prandom_u32_state+0xe/0x170 [ 64.476671][ T6834] ? __brelse+0x84/0xa0 [ 64.480819][ T6834] ? __ext4_new_inode+0x144/0x55e0 [ 64.485925][ T6834] ext4_getblk+0xad/0x520 [ 64.490243][ T6834] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.495952][ T6834] ? ext4_free_inode+0x1700/0x1700 [ 64.501064][ T6834] ext4_bread+0x7c/0x380 [ 64.505303][ T6834] ? ext4_getblk+0x520/0x520 [ 64.509879][ T6834] ? dquot_get_next_dqblk+0x180/0x180 [ 64.515244][ T6834] ext4_append+0x153/0x360 [ 64.519648][ T6834] ext4_mkdir+0x5e0/0xdf0 [ 64.523968][ T6834] ? ext4_rmdir+0xde0/0xde0 [ 64.528458][ T6834] ? security_inode_permission+0xc4/0xf0 [ 64.534098][ T6834] vfs_mkdir+0x419/0x690 [ 64.538501][ T6834] do_mkdirat+0x21e/0x280 [ 64.542817][ T6834] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.547653][ T6834] ? do_syscall_64+0x1c/0xe0 [ 64.552229][ T6834] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.558281][ T6834] do_syscall_64+0x60/0xe0 [ 64.562685][ T6834] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.568566][ T6834] RIP: 0033:0x45bed7 [ 64.572451][ T6834] Code: Bad RIP value. [ 64.576498][ T6834] RSP: 002b:00007ffd4e1795e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 64.584890][ T6834] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 64.592844][ T6834] RDX: 00007ffd4e179633 RSI: 00000000000001ff RDI: 00007ffd4e179630 [ 64.600972][ T6834] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 64.608925][ T6834] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185c0 [ 64.616877][ T6834] R13: 00007ffd4e179620 R14: 0000000000000000 R15: 00007ffd4e179630 [ 64.625114][ T43] CPU: 0 PID: 43 Comm: kworker/u4:3 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.633357][ T43] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.643428][ T43] Workqueue: writeback wb_workfn (flush-8:0) [ 64.649412][ T43] Call Trace: [ 64.652971][ T43] dump_stack+0x18f/0x20d [ 64.657314][ T43] check_preemption_disabled+0x20d/0x220 [ 64.662953][ T43] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.668094][ T43] ? ext4_find_extent+0x81a/0xad0 [ 64.673134][ T43] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.678598][ T43] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.684331][ T43] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.689635][ T43] ? ext4_ext_release+0x10/0x10 [ 64.694516][ T43] ? down_write_killable+0x170/0x170 [ 64.699805][ T43] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.705279][ T43] ext4_map_blocks+0x4cb/0x1640 [ 64.710235][ T43] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.715446][ T43] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.721004][ T43] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.726991][ T43] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.732464][ T43] ext4_writepages+0x1a7b/0x33c0 [ 64.737433][ T43] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.743074][ T43] ? __lock_acquire+0x2224/0x48b0 [ 64.748125][ T43] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.754113][ T43] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.760114][ T43] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.765750][ T43] ? do_writepages+0xfa/0x2a0 [ 64.770433][ T43] do_writepages+0xfa/0x2a0 [ 64.775211][ T43] ? page_writeback_cpu_online+0x10/0x10 [ 64.775989][ T6834] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6834 [ 64.780846][ T43] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.780863][ T43] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.780879][ T43] ? lock_downgrade+0x840/0x840 [ 64.780901][ T43] __writeback_single_inode+0x12a/0x13d0 [ 64.780919][ T43] ? _raw_spin_unlock+0x24/0x40 [ 64.780936][ T43] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.780957][ T43] writeback_sb_inodes+0x515/0xdc0 [ 64.780987][ T43] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.781022][ T43] __writeback_inodes_wb+0xc3/0x250 [ 64.790367][ T6834] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.795891][ T43] wb_writeback+0x8db/0xd50 [ 64.795917][ T43] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.795945][ T43] ? cpumask_next+0x3c/0x40 [ 64.795962][ T43] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.795986][ T43] wb_workfn+0x9bc/0x1090 [ 64.870137][ T43] ? inode_wait_for_writeback+0x30/0x30 [ 64.875677][ T43] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.881208][ T43] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.887531][ T43] process_one_work+0x965/0x1690 [ 64.892595][ T43] ? lock_release+0x800/0x800 [ 64.897281][ T43] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.902652][ T43] ? rwlock_bug.part.0+0x90/0x90 [ 64.907602][ T43] worker_thread+0x96/0xe10 [ 64.912113][ T43] ? process_one_work+0x1690/0x1690 [ 64.917300][ T43] kthread+0x3b5/0x4a0 [ 64.921356][ T43] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.927072][ T43] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.932784][ T43] ret_from_fork+0x1f/0x30 [ 64.937206][ T6834] CPU: 1 PID: 6834 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.943230][ T43] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:3/43 [ 64.945787][ T6834] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.945794][ T6834] Call Trace: [ 64.945821][ T6834] dump_stack+0x18f/0x20d [ 64.945844][ T6834] check_preemption_disabled+0x20d/0x220 [ 64.954875][ T43] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.964879][ T6834] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.964909][ T6834] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.964929][ T6834] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.000203][ T6834] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.005482][ T6834] ? ext4_ext_release+0x10/0x10 [ 65.010453][ T6834] ? down_write_killable+0x170/0x170 [ 65.015730][ T6834] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.021186][ T6834] ext4_map_blocks+0x4cb/0x1640 [ 65.026033][ T6834] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.031217][ T6834] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.036834][ T6834] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.042795][ T6834] ? prandom_u32_state+0xe/0x170 [ 65.047817][ T6834] ? __brelse+0x84/0xa0 [ 65.051955][ T6834] ? __ext4_new_inode+0x144/0x55e0 [ 65.057144][ T6834] ext4_getblk+0xad/0x520 [ 65.061461][ T6834] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.067193][ T6834] ? ext4_free_inode+0x1700/0x1700 [ 65.072298][ T6834] ext4_bread+0x7c/0x380 [ 65.076528][ T6834] ? ext4_getblk+0x520/0x520 [ 65.081109][ T6834] ? dquot_get_next_dqblk+0x180/0x180 [ 65.086476][ T6834] ext4_append+0x153/0x360 [ 65.090883][ T6834] ext4_mkdir+0x5e0/0xdf0 [ 65.095306][ T6834] ? ext4_rmdir+0xde0/0xde0 [ 65.099800][ T6834] ? security_inode_permission+0xc4/0xf0 [ 65.105426][ T6834] vfs_mkdir+0x419/0x690 [ 65.109658][ T6834] do_mkdirat+0x21e/0x280 [ 65.113974][ T6834] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.118808][ T6834] ? do_syscall_64+0x1c/0xe0 [ 65.123385][ T6834] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.129441][ T6834] do_syscall_64+0x60/0xe0 [ 65.133846][ T6834] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.139721][ T6834] RIP: 0033:0x45bed7 [ 65.143590][ T6834] Code: Bad RIP value. [ 65.147642][ T6834] RSP: 002b:00007ffd4e1795e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 65.156035][ T6834] RAX: ffffffffffffffda RBX: 000000000000fc84 RCX: 000000000045bed7 [ 65.163988][ T6834] RDX: 00007ffd4e179633 RSI: 00000000000001ff RDI: 00007ffd4e179630 [ 65.171940][ T6834] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 65.179978][ T6834] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 65.187943][ T6834] R13: 00007ffd4e179620 R14: 000000000000fc81 R15: 00007ffd4e179630 [ 65.195920][ T43] CPU: 0 PID: 43 Comm: kworker/u4:3 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.204165][ T43] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.214232][ T43] Workqueue: writeback wb_workfn (flush-8:0) [ 65.220207][ T43] Call Trace: [ 65.223499][ T43] dump_stack+0x18f/0x20d [ 65.227928][ T43] check_preemption_disabled+0x20d/0x220 [ 65.233571][ T43] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.238692][ T43] ? ext4_find_extent+0x81a/0xad0 [ 65.243729][ T43] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.249191][ T43] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.254927][ T43] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.260224][ T43] ? ext4_ext_release+0x10/0x10 [ 65.265096][ T43] ? down_write_killable+0x170/0x170 [ 65.270406][ T43] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.275878][ T43] ext4_map_blocks+0x4cb/0x1640 [ 65.280859][ T43] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.286074][ T43] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.292143][ T43] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.298138][ T43] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 65.303582][ T43] ext4_writepages+0x1a7b/0x33c0 [ 65.308535][ T43] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.314161][ T43] ? __lock_acquire+0x2224/0x48b0 [ 65.319182][ T43] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.325164][ T43] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.331135][ T43] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.336749][ T43] ? do_writepages+0xfa/0x2a0 [ 65.341407][ T43] do_writepages+0xfa/0x2a0 [ 65.345907][ T43] ? page_writeback_cpu_online+0x10/0x10 [ 65.351528][ T43] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.357055][ T43] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.363016][ T43] ? lock_downgrade+0x840/0x840 [ 65.367856][ T43] __writeback_single_inode+0x12a/0x13d0 [ 65.373473][ T43] ? _raw_spin_unlock+0x24/0x40 [ 65.378305][ T43] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 65.384269][ T43] writeback_sb_inodes+0x515/0xdc0 [ 65.389386][ T43] ? __writeback_single_inode+0x13d0/0x13d0 [ 65.395278][ T43] __writeback_inodes_wb+0xc3/0x250 [ 65.400466][ T43] wb_writeback+0x8db/0xd50 [ 65.404969][ T43] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 65.411297][ T43] ? cpumask_next+0x3c/0x40 [ 65.415787][ T43] ? get_nr_dirty_inodes+0xd6/0x130 [ 65.420972][ T43] wb_workfn+0x9bc/0x1090 [ 65.425292][ T43] ? inode_wait_for_writeback+0x30/0x30 [ 65.430823][ T43] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.436350][ T43] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.442329][ T43] process_one_work+0x965/0x1690 [ 65.447254][ T43] ? lock_release+0x800/0x800 [ 65.451913][ T43] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.457616][ T43] ? rwlock_bug.part.0+0x90/0x90 [ 65.462541][ T43] worker_thread+0x96/0xe10 [ 65.467042][ T43] ? process_one_work+0x1690/0x1690 [ 65.472222][ T43] kthread+0x3b5/0x4a0 [ 65.476274][ T43] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.481980][ T43] ? kthread_mod_delayed_work+0x1a0/0x1a0 2020/06/16 07:51:19 building call list... [ 65.487684][ T43] ret_from_fork+0x1f/0x30 [ 65.710745][ T43] tipc: TX() has been purged, node left! [ 66.233050][ T43] ================================================================== [ 66.241286][ T43] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 66.249170][ T43] Write of size 1 at addr ffff88809fd939e4 by task kworker/u4:3/43 [ 66.257047][ T43] [ 66.259379][ T43] CPU: 0 PID: 43 Comm: kworker/u4:3 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.267602][ T43] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.277658][ T43] Workqueue: netns cleanup_net [ 66.282445][ T43] Call Trace: [ 66.285741][ T43] dump_stack+0x18f/0x20d [ 66.290071][ T43] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.295612][ T43] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.301149][ T43] ? afs_put_call+0xa40/0xa40 [ 66.305824][ T43] print_address_description.constprop.0.cold+0xd3/0x413 [ 66.312849][ T43] ? vprintk_func+0x97/0x1a6 [ 66.317441][ T43] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.322981][ T43] kasan_report.cold+0x1f/0x37 [ 66.327751][ T43] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.333377][ T43] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.338920][ T43] afs_wake_up_async_call+0x6aa/0x770 [ 66.344305][ T43] ? afs_close_socket+0x320/0x320 [ 66.349331][ T43] ? afs_put_call+0xa40/0xa40 [ 66.354006][ T43] rxrpc_notify_socket+0x1db/0x5d0 [ 66.359127][ T43] ? afs_put_call+0xa40/0xa40 [ 66.363804][ T43] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.370220][ T43] rxrpc_call_completed+0xca/0xf0 [ 66.375338][ T43] rxrpc_discard_prealloc+0x781/0xab0 [ 66.380710][ T43] ? lock_sock_nested+0x94/0x110 [ 66.385649][ T43] rxrpc_listen+0x147/0x360 [ 66.390152][ T43] afs_close_socket+0x95/0x320 [ 66.394911][ T43] ? afs_purge_servers+0x16d/0x300 [ 66.400028][ T43] ? afs_rx_discard_new_call+0x50/0x50 [ 66.405493][ T43] ? init_wait_var_entry+0x200/0x200 [ 66.410795][ T43] ? rcu_read_lock_held_common+0xa0/0xa0 [ 66.416444][ T43] ? check_preemption_disabled+0x38/0x220 [ 66.422166][ T43] afs_net_exit+0x1bc/0x310 [ 66.426666][ T43] ? afs_net_init+0xe30/0xe30 [ 66.431339][ T43] ops_exit_list.isra.0+0xa8/0x150 [ 66.436449][ T43] cleanup_net+0x511/0xa50 [ 66.440874][ T43] ? unregister_pernet_device+0x70/0x70 [ 66.446437][ T43] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.452424][ T43] process_one_work+0x965/0x1690 [ 66.457371][ T43] ? lock_release+0x800/0x800 [ 66.462054][ T43] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.467432][ T43] ? rwlock_bug.part.0+0x90/0x90 [ 66.472380][ T43] worker_thread+0x96/0xe10 [ 66.476895][ T43] ? process_one_work+0x1690/0x1690 [ 66.482096][ T43] kthread+0x3b5/0x4a0 [ 66.486165][ T43] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.491884][ T43] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.497606][ T43] ret_from_fork+0x1f/0x30 [ 66.502031][ T43] [ 66.504377][ T43] Allocated by task 6834: [ 66.508706][ T43] save_stack+0x1b/0x40 [ 66.512858][ T43] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 66.518745][ T43] kmem_cache_alloc_trace+0x153/0x7d0 [ 66.524112][ T43] afs_alloc_call+0x55/0x630 [ 66.528694][ T43] afs_charge_preallocation+0xe9/0x2d0 [ 66.534149][ T43] afs_open_socket+0x292/0x360 [ 66.538907][ T43] afs_net_init+0xa6c/0xe30 [ 66.543401][ T43] ops_init+0xaf/0x420 [ 66.547464][ T43] setup_net+0x2de/0x860 [ 66.551700][ T43] copy_net_ns+0x293/0x590 [ 66.556118][ T43] create_new_namespaces+0x3fb/0xb30 [ 66.561396][ T43] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 66.567020][ T43] ksys_unshare+0x43d/0x8e0 [ 66.571519][ T43] __x64_sys_unshare+0x2d/0x40 [ 66.576279][ T43] do_syscall_64+0x60/0xe0 [ 66.580691][ T43] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.586568][ T43] [ 66.588894][ T43] Freed by task 43: [ 66.592714][ T43] save_stack+0x1b/0x40 [ 66.596890][ T43] __kasan_slab_free+0xf7/0x140 [ 66.601748][ T43] kfree+0x109/0x2b0 [ 66.605644][ T43] afs_put_call+0x585/0xa40 [ 66.610146][ T43] rxrpc_discard_prealloc+0x764/0xab0 [ 66.615518][ T43] rxrpc_listen+0x147/0x360 [ 66.620013][ T43] afs_close_socket+0x95/0x320 [ 66.624768][ T43] afs_net_exit+0x1bc/0x310 [ 66.629265][ T43] ops_exit_list.isra.0+0xa8/0x150 [ 66.634385][ T43] cleanup_net+0x511/0xa50 [ 66.638797][ T43] process_one_work+0x965/0x1690 [ 66.643726][ T43] worker_thread+0x96/0xe10 [ 66.648261][ T43] kthread+0x3b5/0x4a0 [ 66.652325][ T43] ret_from_fork+0x1f/0x30 [ 66.656724][ T43] [ 66.659046][ T43] The buggy address belongs to the object at ffff88809fd93800 [ 66.659046][ T43] which belongs to the cache kmalloc-1k of size 1024 [ 66.673490][ T43] The buggy address is located 484 bytes inside of [ 66.673490][ T43] 1024-byte region [ffff88809fd93800, ffff88809fd93c00) [ 66.686833][ T43] The buggy address belongs to the page: [ 66.692464][ T43] page:ffffea00027f64c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88809fd93000 [ 66.702873][ T43] flags: 0xfffe0000000200(slab) [ 66.707732][ T43] raw: 00fffe0000000200 ffffea0002a1a908 ffffea0002749ec8 ffff8880aa000c40 [ 66.716320][ T43] raw: ffff88809fd93000 ffff88809fd93000 0000000100000001 0000000000000000 [ 66.724918][ T43] page dumped because: kasan: bad access detected [ 66.731317][ T43] [ 66.733640][ T43] Memory state around the buggy address: [ 66.739631][ T43] ffff88809fd93880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.747699][ T43] ffff88809fd93900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.755743][ T43] >ffff88809fd93980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.763786][ T43] ^ [ 66.770975][ T43] ffff88809fd93a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.779031][ T43] ffff88809fd93a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.787130][ T43] ================================================================== [ 66.795181][ T43] Disabling lock debugging due to kernel taint [ 66.801629][ T43] Kernel panic - not syncing: panic_on_warn set ... [ 66.808259][ T43] CPU: 0 PID: 43 Comm: kworker/u4:3 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 66.818045][ T43] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.828187][ T43] Workqueue: netns cleanup_net [ 66.832942][ T43] Call Trace: [ 66.836357][ T43] dump_stack+0x18f/0x20d [ 66.840686][ T43] ? afs_wake_up_async_call+0x670/0x770 [ 66.846222][ T43] ? afs_put_call+0xa40/0xa40 [ 66.850919][ T43] panic+0x2e3/0x75c [ 66.854833][ T43] ? __warn_printk+0xf3/0xf3 [ 66.859417][ T43] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 66.865566][ T43] ? trace_hardirqs_on+0x55/0x220 [ 66.871549][ T43] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.877084][ T43] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.882618][ T43] ? afs_put_call+0xa40/0xa40 [ 66.887288][ T43] end_report+0x4d/0x53 [ 66.891435][ T43] kasan_report.cold+0xd/0x37 [ 66.896110][ T43] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.901752][ T43] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.907303][ T43] afs_wake_up_async_call+0x6aa/0x770 [ 66.912689][ T43] ? afs_close_socket+0x320/0x320 [ 66.917704][ T43] ? afs_put_call+0xa40/0xa40 [ 66.922372][ T43] rxrpc_notify_socket+0x1db/0x5d0 [ 66.927499][ T43] ? afs_put_call+0xa40/0xa40 [ 66.932184][ T43] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.938594][ T43] rxrpc_call_completed+0xca/0xf0 [ 66.943620][ T43] rxrpc_discard_prealloc+0x781/0xab0 [ 66.948999][ T43] ? lock_sock_nested+0x94/0x110 [ 66.953936][ T43] rxrpc_listen+0x147/0x360 [ 66.958445][ T43] afs_close_socket+0x95/0x320 [ 66.963220][ T43] ? afs_purge_servers+0x16d/0x300 [ 66.969282][ T43] ? afs_rx_discard_new_call+0x50/0x50 [ 66.974739][ T43] ? init_wait_var_entry+0x200/0x200 [ 66.980020][ T43] ? rcu_read_lock_held_common+0xa0/0xa0 [ 66.985646][ T43] ? check_preemption_disabled+0x38/0x220 [ 66.991361][ T43] afs_net_exit+0x1bc/0x310 [ 66.995856][ T43] ? afs_net_init+0xe30/0xe30 [ 67.000528][ T43] ops_exit_list.isra.0+0xa8/0x150 [ 67.005632][ T43] cleanup_net+0x511/0xa50 [ 67.010039][ T43] ? unregister_pernet_device+0x70/0x70 [ 67.015583][ T43] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.021557][ T43] process_one_work+0x965/0x1690 [ 67.026493][ T43] ? lock_release+0x800/0x800 [ 67.031164][ T43] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.036526][ T43] ? rwlock_bug.part.0+0x90/0x90 [ 67.041455][ T43] worker_thread+0x96/0xe10 [ 67.045959][ T43] ? process_one_work+0x1690/0x1690 [ 67.051149][ T43] kthread+0x3b5/0x4a0 [ 67.055210][ T43] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.061058][ T43] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.066863][ T43] ret_from_fork+0x1f/0x30 [ 67.072701][ T43] Kernel Offset: disabled [ 67.077072][ T43] Rebooting in 86400 seconds..