[ 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... [ OK ] Started Update UTMP about System Runlevel Changes. [ 58.472975][ T446] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:4/446 [ 58.482112][ T446] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.488498][ T446] CPU: 0 PID: 446 Comm: kworker/u4:4 Not tainted 5.8.0-rc1-syzkaller #0 [ 58.496825][ T446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.506896][ T446] Workqueue: writeback wb_workfn (flush-8:0) [ 58.512877][ T446] Call Trace: [ 58.516172][ T446] dump_stack+0x18f/0x20d [ 58.520515][ T446] check_preemption_disabled+0x20d/0x220 [ 58.526151][ T446] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.531272][ T446] ? ext4_find_extent+0x81a/0xad0 [ 58.536312][ T446] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.541802][ T446] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.547535][ T446] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.552837][ T446] ? ext4_ext_release+0x10/0x10 [ 58.557714][ T446] ? down_write_killable+0x170/0x170 [ 58.563000][ T446] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.568470][ T446] ext4_map_blocks+0x4cb/0x1640 [ 58.573334][ T446] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.578554][ T446] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.584106][ T446] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.590089][ T446] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.595555][ T446] ext4_writepages+0x1a7b/0x33c0 [ 58.600524][ T446] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.606282][ T446] ? __lock_acquire+0x2224/0x48b0 [ 58.611360][ T446] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.617356][ T446] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.623355][ T446] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.628993][ T446] ? do_writepages+0xfa/0x2a0 [ 58.633674][ T446] do_writepages+0xfa/0x2a0 [ 58.638196][ T446] ? page_writeback_cpu_online+0x10/0x10 [ 58.643849][ T446] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.649409][ T446] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.655401][ T446] ? lock_downgrade+0x840/0x840 [ 58.660265][ T446] __writeback_single_inode+0x12a/0x13d0 [ 58.665903][ T446] ? _raw_spin_unlock+0x24/0x40 [ 58.670760][ T446] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 58.676749][ T446] writeback_sb_inodes+0x515/0xdc0 [ 58.681886][ T446] ? __writeback_single_inode+0x13d0/0x13d0 [ 58.687806][ T446] __writeback_inodes_wb+0xc3/0x250 [ 58.693016][ T446] wb_writeback+0x8db/0xd50 [ 58.697533][ T446] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 58.703870][ T446] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 58.709783][ T446] ? cpumask_next+0x3c/0x40 [ 58.715509][ T446] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.720727][ T446] wb_workfn+0xab3/0x1090 [ 58.725069][ T446] ? inode_wait_for_writeback+0x30/0x30 [ 58.730632][ T446] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.736186][ T446] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.742179][ T446] process_one_work+0x965/0x1690 [ 58.747130][ T446] ? lock_release+0x800/0x800 [ 58.751812][ T446] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.757189][ T446] ? rwlock_bug.part.0+0x90/0x90 [ 58.762153][ T446] worker_thread+0x96/0xe10 [ 58.766676][ T446] ? process_one_work+0x1690/0x1690 [ 58.771889][ T446] kthread+0x3b5/0x4a0 [ 58.775965][ T446] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.781685][ T446] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.787412][ T446] ret_from_fork+0x1f/0x30 Starting Load/Save RF Kill Switch Status... [ 58.937897][ T6727] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6727 [ 58.947373][ T6727] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.953686][ T6727] CPU: 0 PID: 6727 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 58.962267][ T6727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.972311][ T6727] Call Trace: [ 58.975592][ T6727] dump_stack+0x18f/0x20d [ 58.979921][ T6727] check_preemption_disabled+0x20d/0x220 [ 58.985550][ T6727] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.990736][ T6727] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.996196][ T6727] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.001905][ T6727] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.007187][ T6727] ? ext4_ext_release+0x10/0x10 [ 59.012030][ T6727] ? down_write_killable+0x170/0x170 [ 59.017292][ T6727] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.022865][ T6727] ext4_map_blocks+0x4cb/0x1640 [ 59.027724][ T6727] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.032908][ T6727] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.038438][ T6727] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.044452][ T6727] ? prandom_u32_state+0xe/0x170 [ 59.049369][ T6727] ? __brelse+0x84/0xa0 [ 59.053504][ T6727] ? __ext4_new_inode+0x144/0x55e0 [ 59.058598][ T6727] ext4_getblk+0xad/0x520 [ 59.062909][ T6727] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.068607][ T6727] ? ext4_free_inode+0x1700/0x1700 [ 59.073713][ T6727] ext4_bread+0x7c/0x380 [ 59.077941][ T6727] ? ext4_getblk+0x520/0x520 [ 59.082509][ T6727] ? dquot_get_next_dqblk+0x180/0x180 [ 59.087862][ T6727] ext4_append+0x153/0x360 [ 59.092263][ T6727] ext4_mkdir+0x5e0/0xdf0 [ 59.096575][ T6727] ? ext4_rmdir+0xde0/0xde0 [ 59.101053][ T6727] ? security_inode_permission+0xc4/0xf0 [ 59.106665][ T6727] vfs_mkdir+0x419/0x690 [ 59.110900][ T6727] do_mkdirat+0x21e/0x280 [ 59.115209][ T6727] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.120046][ T6727] ? do_syscall_64+0x1c/0xe0 [ 59.124631][ T6727] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.130603][ T6727] do_syscall_64+0x60/0xe0 [ 59.135014][ T6727] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.140973][ T6727] RIP: 0033:0x7f850523e687 [ 59.145360][ T6727] Code: Bad RIP value. [ 59.149399][ T6727] RSP: 002b:00007ffc578012b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 59.157888][ T6727] RAX: ffffffffffffffda RBX: 0000556fbfbbf985 RCX: 00007f850523e687 [ 59.165835][ T6727] RDX: 00007ffc57801180 RSI: 00000000000001ed RDI: 0000556fbfbbf985 [ 59.174912][ T6727] RBP: 00007f850523e680 R08: 0000000000000100 R09: 0000000000000000 [ 59.182871][ T6727] R10: 0000556fbfbbf980 R11: 0000000000000246 R12: 00000000000001ed [ 59.190816][ T6727] R13: 00007ffc57801440 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.56' (ECDSA) to the list of known hosts. 2020/06/16 15:17:18 fuzzer started 2020/06/16 15:17:19 connecting to host at 10.128.0.26:40385 2020/06/16 15:17:19 checking machine... 2020/06/16 15:17:19 checking revisions... syzkaller login: [ 63.832588][ T28] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/28 [ 63.841921][ T28] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.847829][ T28] CPU: 0 PID: 28 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 63.856072][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.866230][ T28] Workqueue: writeback wb_workfn (flush-8:0) [ 63.872200][ T28] Call Trace: [ 63.875480][ T28] dump_stack+0x18f/0x20d [ 63.879813][ T28] check_preemption_disabled+0x20d/0x220 [ 63.885428][ T28] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.890525][ T28] ? ext4_find_extent+0x81a/0xad0 [ 63.895537][ T28] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.900981][ T28] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.906705][ T28] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.911986][ T28] ? ext4_ext_release+0x10/0x10 [ 63.916837][ T28] ? down_write_killable+0x170/0x170 [ 63.922101][ T28] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.927547][ T28] ext4_map_blocks+0x4cb/0x1640 [ 63.932388][ T28] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.937589][ T28] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.943211][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.949171][ T28] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 63.954616][ T28] ext4_writepages+0x1a7b/0x33c0 [ 63.959556][ T28] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.965173][ T28] ? __lock_acquire+0x2224/0x48b0 [ 63.970191][ T28] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 63.976259][ T28] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 63.982225][ T28] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.987838][ T28] ? do_writepages+0xfa/0x2a0 [ 63.992497][ T28] do_writepages+0xfa/0x2a0 [ 63.997000][ T28] ? page_writeback_cpu_online+0x10/0x10 [ 64.002619][ T28] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.008150][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.016455][ T28] ? lock_downgrade+0x840/0x840 [ 64.021295][ T28] __writeback_single_inode+0x12a/0x13d0 [ 64.026913][ T28] ? _raw_spin_unlock+0x24/0x40 [ 64.031746][ T28] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.037710][ T28] writeback_sb_inodes+0x515/0xdc0 [ 64.042906][ T28] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.048798][ T28] __writeback_inodes_wb+0xc3/0x250 [ 64.053995][ T28] wb_writeback+0x8db/0xd50 [ 64.058489][ T28] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.064806][ T28] ? cpumask_next+0x3c/0x40 [ 64.069290][ T28] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.074476][ T28] wb_workfn+0x9bc/0x1090 [ 64.078795][ T28] ? inode_wait_for_writeback+0x30/0x30 [ 64.084336][ T28] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.089865][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.095870][ T28] process_one_work+0x965/0x1690 [ 64.100803][ T28] ? lock_release+0x800/0x800 [ 64.105462][ T28] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.110819][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 64.115745][ T28] worker_thread+0x96/0xe10 [ 64.120238][ T28] ? process_one_work+0x1690/0x1690 [ 64.125418][ T28] kthread+0x3b5/0x4a0 2020/06/16 15:17:19 testing simple program... [ 64.129470][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.135170][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.140877][ T28] ret_from_fork+0x1f/0x30 [ 64.174275][ T28] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/28 [ 64.183603][ T28] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.189505][ T28] CPU: 0 PID: 28 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.197735][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.207804][ T28] Workqueue: writeback wb_workfn (flush-8:0) [ 64.213804][ T28] Call Trace: [ 64.217100][ T28] dump_stack+0x18f/0x20d [ 64.221444][ T28] check_preemption_disabled+0x20d/0x220 [ 64.227083][ T28] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.232204][ T28] ? ext4_find_extent+0x81a/0xad0 [ 64.237241][ T28] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.242705][ T28] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.248466][ T28] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.253764][ T28] ? ext4_ext_release+0x10/0x10 [ 64.258640][ T28] ? down_write_killable+0x170/0x170 [ 64.263947][ T28] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.269423][ T28] ext4_map_blocks+0x4cb/0x1640 [ 64.274287][ T28] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.279501][ T28] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.285057][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.291039][ T28] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.296508][ T28] ext4_writepages+0x1a7b/0x33c0 [ 64.301479][ T28] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.307122][ T28] ? __lock_acquire+0x2224/0x48b0 [ 64.312176][ T28] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.318171][ T28] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.324161][ T28] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.329796][ T28] ? do_writepages+0xfa/0x2a0 [ 64.334474][ T28] do_writepages+0xfa/0x2a0 [ 64.339250][ T28] ? page_writeback_cpu_online+0x10/0x10 [ 64.344895][ T28] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.350454][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.356435][ T28] ? lock_downgrade+0x840/0x840 [ 64.361306][ T28] __writeback_single_inode+0x12a/0x13d0 [ 64.366945][ T28] ? _raw_spin_unlock+0x24/0x40 [ 64.371800][ T28] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.377791][ T28] writeback_sb_inodes+0x515/0xdc0 [ 64.382921][ T28] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.391010][ T28] __writeback_inodes_wb+0xc3/0x250 [ 64.396235][ T28] wb_writeback+0x8db/0xd50 [ 64.400762][ T28] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.407102][ T28] ? cpumask_next+0x3c/0x40 [ 64.411608][ T28] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.416832][ T28] wb_workfn+0x9bc/0x1090 [ 64.421177][ T28] ? inode_wait_for_writeback+0x30/0x30 [ 64.426729][ T28] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.432296][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.438289][ T28] process_one_work+0x965/0x1690 [ 64.443239][ T28] ? lock_release+0x800/0x800 [ 64.447917][ T28] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.453293][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 64.458241][ T28] worker_thread+0x96/0xe10 [ 64.462761][ T28] ? process_one_work+0x1690/0x1690 [ 64.467960][ T28] kthread+0x3b5/0x4a0 [ 64.472030][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.477745][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.483471][ T28] ret_from_fork+0x1f/0x30 [ 64.493840][ T28] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/28 [ 64.503157][ T28] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.509058][ T28] CPU: 0 PID: 28 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.517297][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.527363][ T28] Workqueue: writeback wb_workfn (flush-8:0) [ 64.533339][ T28] Call Trace: [ 64.536631][ T28] dump_stack+0x18f/0x20d [ 64.539116][ T6799] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6799 [ 64.540975][ T28] check_preemption_disabled+0x20d/0x220 [ 64.541003][ T28] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.549998][ T6799] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.555609][ T28] ? ext4_find_extent+0x81a/0xad0 [ 64.555632][ T28] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.555648][ T28] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.555674][ T28] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.555702][ T28] ? ext4_ext_release+0x10/0x10 [ 64.592963][ T28] ? down_write_killable+0x170/0x170 [ 64.598232][ T28] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.603699][ T28] ext4_map_blocks+0x4cb/0x1640 [ 64.608548][ T28] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.613743][ T28] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.619282][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.625251][ T28] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.630709][ T28] ext4_writepages+0x1a7b/0x33c0 [ 64.635654][ T28] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.641270][ T28] ? __lock_acquire+0x2224/0x48b0 [ 64.646291][ T28] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.652360][ T28] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.658342][ T28] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.663978][ T28] ? do_writepages+0xfa/0x2a0 [ 64.668643][ T28] do_writepages+0xfa/0x2a0 [ 64.673140][ T28] ? page_writeback_cpu_online+0x10/0x10 [ 64.678760][ T28] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.684305][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.690267][ T28] ? lock_downgrade+0x840/0x840 [ 64.695117][ T28] __writeback_single_inode+0x12a/0x13d0 [ 64.700735][ T28] ? _raw_spin_unlock+0x24/0x40 [ 64.705570][ T28] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.711537][ T28] writeback_sb_inodes+0x515/0xdc0 [ 64.716645][ T28] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.722553][ T28] __writeback_inodes_wb+0xc3/0x250 [ 64.727753][ T28] wb_writeback+0x8db/0xd50 [ 64.732252][ T28] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.738588][ T28] ? cpumask_next+0x3c/0x40 [ 64.743076][ T28] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.748278][ T28] wb_workfn+0x9bc/0x1090 [ 64.752608][ T28] ? inode_wait_for_writeback+0x30/0x30 [ 64.758144][ T28] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.763676][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.769645][ T28] process_one_work+0x965/0x1690 [ 64.774680][ T28] ? lock_release+0x800/0x800 [ 64.779349][ T28] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.784726][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 64.789671][ T28] worker_thread+0x96/0xe10 [ 64.794174][ T28] ? process_one_work+0x1690/0x1690 [ 64.799357][ T28] kthread+0x3b5/0x4a0 [ 64.803414][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.809129][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.814845][ T28] ret_from_fork+0x1f/0x30 [ 64.819267][ T6799] CPU: 1 PID: 6799 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 64.827653][ T6799] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.837707][ T6799] Call Trace: [ 64.841017][ T6799] dump_stack+0x18f/0x20d [ 64.845449][ T6799] check_preemption_disabled+0x20d/0x220 [ 64.851083][ T6799] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.856215][ T6799] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.861655][ T6799] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.867361][ T6799] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.872644][ T6799] ? ext4_ext_release+0x10/0x10 [ 64.877482][ T6799] ? down_write_killable+0x170/0x170 [ 64.882749][ T6799] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.888203][ T6799] ext4_map_blocks+0x4cb/0x1640 [ 64.893056][ T6799] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.898348][ T6799] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.903900][ T6799] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.909863][ T6799] ? prandom_u32_state+0xe/0x170 [ 64.914789][ T6799] ? __brelse+0x84/0xa0 [ 64.918928][ T6799] ? __ext4_new_inode+0x144/0x55e0 [ 64.924020][ T6799] ext4_getblk+0xad/0x520 [ 64.928397][ T6799] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.934150][ T6799] ? ext4_free_inode+0x1700/0x1700 [ 64.939280][ T6799] ext4_bread+0x7c/0x380 [ 64.943509][ T6799] ? ext4_getblk+0x520/0x520 [ 64.948262][ T6799] ? dquot_get_next_dqblk+0x180/0x180 [ 64.953725][ T6799] ext4_append+0x153/0x360 [ 64.958125][ T6799] ext4_mkdir+0x5e0/0xdf0 [ 64.962456][ T6799] ? ext4_rmdir+0xde0/0xde0 [ 64.966938][ T6799] ? security_inode_permission+0xc4/0xf0 [ 64.974734][ T6799] vfs_mkdir+0x419/0x690 [ 64.978960][ T6799] do_mkdirat+0x21e/0x280 [ 64.983268][ T6799] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.988097][ T6799] ? do_syscall_64+0x1c/0xe0 [ 64.992666][ T6799] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.998644][ T6799] do_syscall_64+0x60/0xe0 [ 65.003475][ T6799] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.009355][ T6799] RIP: 0033:0x4b02a0 [ 65.013221][ T6799] Code: Bad RIP value. [ 65.017260][ T6799] RSP: 002b:000000c0000e54b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 65.025645][ T6799] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 65.033592][ T6799] RDX: 00000000000001c0 RSI: 000000c000316860 RDI: ffffffffffffff9c [ 65.041552][ T6799] RBP: 000000c0000e5510 R08: 0000000000000000 R09: 0000000000000000 [ 65.049505][ T6799] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 65.057464][ T6799] R13: 0000000000000044 R14: 0000000000000043 R15: 0000000000000100 [ 65.083415][ T6818] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6818 [ 65.092915][ T6818] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.098818][ T6818] CPU: 1 PID: 6818 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.107395][ T6818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.117439][ T6818] Call Trace: [ 65.120741][ T6818] dump_stack+0x18f/0x20d [ 65.125170][ T6818] check_preemption_disabled+0x20d/0x220 [ 65.130795][ T6818] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.135907][ T6818] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.141346][ T6818] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.147051][ T6818] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.152329][ T6818] ? ext4_ext_release+0x10/0x10 [ 65.157167][ T6818] ? down_write_killable+0x170/0x170 [ 65.162427][ T6818] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.167864][ T6818] ext4_map_blocks+0x4cb/0x1640 [ 65.172697][ T6818] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.177891][ T6818] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.183422][ T6818] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.189380][ T6818] ? prandom_u32_state+0xe/0x170 [ 65.194298][ T6818] ? __brelse+0x84/0xa0 [ 65.198442][ T6818] ? __ext4_new_inode+0x144/0x55e0 [ 65.203533][ T6818] ext4_getblk+0xad/0x520 [ 65.207841][ T6818] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.213645][ T6818] ? ext4_free_inode+0x1700/0x1700 [ 65.218765][ T6818] ext4_bread+0x7c/0x380 [ 65.223003][ T6818] ? ext4_getblk+0x520/0x520 [ 65.227590][ T6818] ? dquot_get_next_dqblk+0x180/0x180 [ 65.232949][ T6818] ext4_append+0x153/0x360 [ 65.237352][ T6818] ext4_mkdir+0x5e0/0xdf0 [ 65.241681][ T6818] ? ext4_rmdir+0xde0/0xde0 [ 65.246169][ T6818] ? security_inode_permission+0xc4/0xf0 [ 65.251788][ T6818] vfs_mkdir+0x419/0x690 [ 65.256013][ T6818] do_mkdirat+0x21e/0x280 [ 65.260326][ T6818] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.265173][ T6818] ? do_syscall_64+0x1c/0xe0 [ 65.269747][ T6818] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.275708][ T6818] do_syscall_64+0x60/0xe0 [ 65.280111][ T6818] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.285980][ T6818] RIP: 0033:0x45bed7 [ 65.289853][ T6818] Code: Bad RIP value. [ 65.293907][ T6818] RSP: 002b:00007ffed29b9b18 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 65.302295][ T6818] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 65.310254][ T6818] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffed29b9cf0 [ 65.318224][ T6818] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 00000000000031c0 [ 65.326181][ T6818] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 65.334143][ T6818] R13: 00007ffed29b9cf0 R14: 8421084210842109 R15: 00007ffed29b9cfc [ 65.419123][ T6819] IPVS: ftp: loaded support on port[0] = 21 [ 65.454797][ T6819] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6819 [ 65.464317][ T6819] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.470208][ T6819] CPU: 1 PID: 6819 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.478784][ T6819] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.488815][ T6819] Call Trace: [ 65.492121][ T6819] dump_stack+0x18f/0x20d [ 65.496432][ T6819] check_preemption_disabled+0x20d/0x220 [ 65.502054][ T6819] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.507151][ T6819] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.512599][ T6819] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.518297][ T6819] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.523585][ T6819] ? ext4_ext_release+0x10/0x10 [ 65.528428][ T6819] ? down_write_killable+0x170/0x170 [ 65.533700][ T6819] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.539137][ T6819] ext4_map_blocks+0x4cb/0x1640 [ 65.543969][ T6819] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.549153][ T6819] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.554679][ T6819] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.560632][ T6819] ? prandom_u32_state+0xe/0x170 [ 65.565546][ T6819] ? __brelse+0x84/0xa0 [ 65.569686][ T6819] ? __ext4_new_inode+0x144/0x55e0 [ 65.574786][ T6819] ext4_getblk+0xad/0x520 [ 65.579094][ T6819] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.584801][ T6819] ? ext4_free_inode+0x1700/0x1700 [ 65.590106][ T6819] ext4_bread+0x7c/0x380 [ 65.594333][ T6819] ? ext4_getblk+0x520/0x520 [ 65.598917][ T6819] ? dquot_get_next_dqblk+0x180/0x180 [ 65.604357][ T6819] ext4_append+0x153/0x360 [ 65.608764][ T6819] ext4_mkdir+0x5e0/0xdf0 [ 65.613147][ T6819] ? ext4_rmdir+0xde0/0xde0 [ 65.617643][ T6819] ? security_inode_permission+0xc4/0xf0 [ 65.623400][ T6819] vfs_mkdir+0x419/0x690 [ 65.627625][ T6819] do_mkdirat+0x21e/0x280 [ 65.631935][ T6819] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.636764][ T6819] ? do_syscall_64+0x1c/0xe0 [ 65.641336][ T6819] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.647293][ T6819] do_syscall_64+0x60/0xe0 [ 65.651690][ T6819] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.657556][ T6819] RIP: 0033:0x45bed7 [ 65.661436][ T6819] Code: Bad RIP value. [ 65.665485][ T6819] RSP: 002b:00007ffed29b9a08 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 65.674072][ T6819] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 65.682023][ T6819] RDX: 00007ffed29b9a53 RSI: 00000000000001ff RDI: 00007ffed29b9a50 [ 65.689986][ T6819] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 65.697943][ T6819] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185c0 [ 65.705891][ T6819] R13: 00007ffed29b9a40 R14: 0000000000000000 R15: 00007ffed29b9a50 [ 65.771751][ T6819] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6819 [ 65.781211][ T6819] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.787111][ T6819] CPU: 1 PID: 6819 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.795712][ T6819] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.805759][ T6819] Call Trace: [ 65.809078][ T6819] dump_stack+0x18f/0x20d [ 65.813423][ T6819] check_preemption_disabled+0x20d/0x220 [ 65.819072][ T6819] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.824201][ T6819] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.829666][ T6819] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.835403][ T6819] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.840700][ T6819] ? ext4_ext_release+0x10/0x10 [ 65.845571][ T6819] ? down_write_killable+0x170/0x170 [ 65.850851][ T6819] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.856334][ T6819] ext4_map_blocks+0x4cb/0x1640 [ 65.861183][ T6819] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.866370][ T6819] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.871894][ T6819] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.877850][ T6819] ? prandom_u32_state+0xe/0x170 [ 65.882826][ T6819] ? __brelse+0x84/0xa0 [ 65.886974][ T6819] ? __ext4_new_inode+0x144/0x55e0 [ 65.892076][ T6819] ext4_getblk+0xad/0x520 [ 65.896385][ T6819] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.902097][ T6819] ? ext4_free_inode+0x1700/0x1700 [ 65.907186][ T6819] ext4_bread+0x7c/0x380 [ 65.911419][ T6819] ? ext4_getblk+0x520/0x520 [ 65.915996][ T6819] ? dquot_get_next_dqblk+0x180/0x180 [ 65.921377][ T6819] ext4_append+0x153/0x360 [ 65.925773][ T6819] ext4_mkdir+0x5e0/0xdf0 [ 65.930081][ T6819] ? ext4_rmdir+0xde0/0xde0 [ 65.934580][ T6819] ? security_inode_permission+0xc4/0xf0 [ 65.940197][ T6819] vfs_mkdir+0x419/0x690 [ 65.944419][ T6819] do_mkdirat+0x21e/0x280 [ 65.948727][ T6819] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.953558][ T6819] ? do_syscall_64+0x1c/0xe0 [ 65.958124][ T6819] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.964082][ T6819] do_syscall_64+0x60/0xe0 [ 65.968477][ T6819] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.974345][ T6819] RIP: 0033:0x45bed7 [ 65.978219][ T6819] Code: Bad RIP value. [ 65.982268][ T6819] RSP: 002b:00007ffed29b9a08 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 65.990659][ T6819] RAX: ffffffffffffffda RBX: 00000000000100e5 RCX: 000000000045bed7 [ 65.998613][ T6819] RDX: 00007ffed29b9a53 RSI: 00000000000001ff RDI: 00007ffed29b9a50 [ 66.006559][ T6819] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 66.014518][ T6819] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 2020/06/16 15:17:21 building call list... [ 66.022639][ T6819] R13: 00007ffed29b9a40 R14: 00000000000100d5 R15: 00007ffed29b9a50 [ 66.290730][ T28] tipc: TX() has been purged, node left! [ 66.822940][ T28] ================================================================== [ 66.831329][ T28] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 66.839219][ T28] Write of size 1 at addr ffff8880a206a1e4 by task kworker/u4:2/28 [ 66.847181][ T28] [ 66.849597][ T28] CPU: 1 PID: 28 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.857825][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.867879][ T28] Workqueue: netns cleanup_net [ 66.872636][ T28] Call Trace: [ 66.875928][ T28] dump_stack+0x18f/0x20d [ 66.880257][ T28] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.885797][ T28] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.891341][ T28] ? afs_put_call+0xa40/0xa40 [ 66.896015][ T28] print_address_description.constprop.0.cold+0xd3/0x413 [ 66.903048][ T28] ? vprintk_func+0x97/0x1a6 [ 66.907639][ T28] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.913182][ T28] kasan_report.cold+0x1f/0x37 [ 66.918466][ T28] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.924093][ T28] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.929635][ T28] afs_wake_up_async_call+0x6aa/0x770 [ 66.935000][ T28] ? afs_close_socket+0x320/0x320 [ 66.940029][ T28] ? afs_put_call+0xa40/0xa40 [ 66.944702][ T28] rxrpc_notify_socket+0x1db/0x5d0 [ 66.949818][ T28] ? afs_put_call+0xa40/0xa40 [ 66.954493][ T28] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.960907][ T28] rxrpc_call_completed+0xca/0xf0 [ 66.965934][ T28] rxrpc_discard_prealloc+0x781/0xab0 [ 66.971306][ T28] ? lock_sock_nested+0x94/0x110 [ 66.976244][ T28] rxrpc_listen+0x147/0x360 [ 66.980747][ T28] afs_close_socket+0x95/0x320 [ 66.985528][ T28] ? afs_purge_servers+0x16d/0x300 [ 66.990637][ T28] ? afs_rx_discard_new_call+0x50/0x50 [ 66.996099][ T28] ? init_wait_var_entry+0x200/0x200 [ 67.001386][ T28] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.007017][ T28] ? check_preemption_disabled+0x38/0x220 [ 67.012736][ T28] afs_net_exit+0x1bc/0x310 [ 67.017241][ T28] ? afs_net_init+0xe30/0xe30 [ 67.021915][ T28] ops_exit_list.isra.0+0xa8/0x150 [ 67.027041][ T28] cleanup_net+0x511/0xa50 [ 67.031455][ T28] ? unregister_pernet_device+0x70/0x70 [ 67.036999][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.042989][ T28] process_one_work+0x965/0x1690 [ 67.047936][ T28] ? lock_release+0x800/0x800 [ 67.052608][ T28] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.057982][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 67.062930][ T28] worker_thread+0x96/0xe10 [ 67.067443][ T28] ? process_one_work+0x1690/0x1690 [ 67.072643][ T28] kthread+0x3b5/0x4a0 [ 67.076716][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.082439][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.088165][ T28] ret_from_fork+0x1f/0x30 [ 67.092603][ T28] [ 67.094927][ T28] Allocated by task 6819: [ 67.099253][ T28] save_stack+0x1b/0x40 [ 67.103416][ T28] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 67.109040][ T28] kmem_cache_alloc_trace+0x153/0x7d0 [ 67.114404][ T28] afs_alloc_call+0x55/0x630 [ 67.118987][ T28] afs_charge_preallocation+0xe9/0x2d0 [ 67.124442][ T28] afs_open_socket+0x292/0x360 [ 67.129208][ T28] afs_net_init+0xa6c/0xe30 [ 67.133702][ T28] ops_init+0xaf/0x420 [ 67.137763][ T28] setup_net+0x2de/0x860 [ 67.141994][ T28] copy_net_ns+0x293/0x590 [ 67.146413][ T28] create_new_namespaces+0x3fb/0xb30 [ 67.151691][ T28] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 67.157315][ T28] ksys_unshare+0x43d/0x8e0 [ 67.161899][ T28] __x64_sys_unshare+0x2d/0x40 [ 67.166658][ T28] do_syscall_64+0x60/0xe0 [ 67.171076][ T28] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.176959][ T28] [ 67.179284][ T28] Freed by task 28: [ 67.183092][ T28] save_stack+0x1b/0x40 [ 67.187244][ T28] __kasan_slab_free+0xf7/0x140 [ 67.192088][ T28] kfree+0x109/0x2b0 [ 67.195976][ T28] afs_put_call+0x585/0xa40 [ 67.200476][ T28] rxrpc_discard_prealloc+0x764/0xab0 [ 67.205843][ T28] rxrpc_listen+0x147/0x360 [ 67.210340][ T28] afs_close_socket+0x95/0x320 [ 67.215094][ T28] afs_net_exit+0x1bc/0x310 [ 67.219589][ T28] ops_exit_list.isra.0+0xa8/0x150 [ 67.224693][ T28] cleanup_net+0x511/0xa50 [ 67.229108][ T28] process_one_work+0x965/0x1690 [ 67.234040][ T28] worker_thread+0x96/0xe10 [ 67.238537][ T28] kthread+0x3b5/0x4a0 [ 67.242603][ T28] ret_from_fork+0x1f/0x30 [ 67.247009][ T28] [ 67.249337][ T28] The buggy address belongs to the object at ffff8880a206a000 [ 67.249337][ T28] which belongs to the cache kmalloc-1k of size 1024 [ 67.263383][ T28] The buggy address is located 484 bytes inside of [ 67.263383][ T28] 1024-byte region [ffff8880a206a000, ffff8880a206a400) [ 67.276726][ T28] The buggy address belongs to the page: [ 67.282357][ T28] page:ffffea0002881a80 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880a206a800 [ 67.292755][ T28] flags: 0xfffe0000000200(slab) [ 67.297612][ T28] raw: 00fffe0000000200 ffffea00027aa148 ffffea00028d6e88 ffff8880aa000c40 [ 67.306192][ T28] raw: ffff8880a206a800 ffff8880a206a000 0000000100000001 0000000000000000 [ 67.314761][ T28] page dumped because: kasan: bad access detected [ 67.321159][ T28] [ 67.323499][ T28] Memory state around the buggy address: [ 67.329122][ T28] ffff8880a206a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.337263][ T28] ffff8880a206a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.345317][ T28] >ffff8880a206a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.353364][ T28] ^ [ 67.360552][ T28] ffff8880a206a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.368604][ T28] ffff8880a206a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.376746][ T28] ================================================================== [ 67.384795][ T28] Disabling lock debugging due to kernel taint [ 67.391009][ T28] Kernel panic - not syncing: panic_on_warn set ... [ 67.397849][ T28] CPU: 1 PID: 28 Comm: kworker/u4:2 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 67.407471][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.417518][ T28] Workqueue: netns cleanup_net [ 67.422264][ T28] Call Trace: [ 67.425546][ T28] dump_stack+0x18f/0x20d [ 67.429869][ T28] ? afs_wake_up_async_call+0x690/0x770 [ 67.435421][ T28] ? afs_put_call+0xa40/0xa40 [ 67.440694][ T28] panic+0x2e3/0x75c [ 67.444581][ T28] ? __warn_printk+0xf3/0xf3 [ 67.449164][ T28] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 67.455312][ T28] ? trace_hardirqs_on+0x55/0x220 [ 67.460328][ T28] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.465864][ T28] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.471410][ T28] ? afs_put_call+0xa40/0xa40 [ 67.476075][ T28] end_report+0x4d/0x53 [ 67.480224][ T28] kasan_report.cold+0xd/0x37 [ 67.484894][ T28] ? rcu_read_lock_held_common+0x51/0xa0 [ 67.490516][ T28] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.496049][ T28] afs_wake_up_async_call+0x6aa/0x770 [ 67.501416][ T28] ? afs_close_socket+0x320/0x320 [ 67.506429][ T28] ? afs_put_call+0xa40/0xa40 [ 67.511095][ T28] rxrpc_notify_socket+0x1db/0x5d0 [ 67.516195][ T28] ? afs_put_call+0xa40/0xa40 [ 67.520862][ T28] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 67.527265][ T28] rxrpc_call_completed+0xca/0xf0 [ 67.532282][ T28] rxrpc_discard_prealloc+0x781/0xab0 [ 67.537644][ T28] ? lock_sock_nested+0x94/0x110 [ 67.542575][ T28] rxrpc_listen+0x147/0x360 [ 67.547067][ T28] afs_close_socket+0x95/0x320 [ 67.551819][ T28] ? afs_purge_servers+0x16d/0x300 [ 67.556928][ T28] ? afs_rx_discard_new_call+0x50/0x50 [ 67.562376][ T28] ? init_wait_var_entry+0x200/0x200 [ 67.567653][ T28] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.573277][ T28] ? check_preemption_disabled+0x38/0x220 [ 67.578989][ T28] afs_net_exit+0x1bc/0x310 [ 67.583483][ T28] ? afs_net_init+0xe30/0xe30 [ 67.588174][ T28] ops_exit_list.isra.0+0xa8/0x150 [ 67.593283][ T28] cleanup_net+0x511/0xa50 [ 67.597695][ T28] ? unregister_pernet_device+0x70/0x70 [ 67.603231][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.609202][ T28] process_one_work+0x965/0x1690 [ 67.614135][ T28] ? lock_release+0x800/0x800 [ 67.618820][ T28] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.624207][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 67.629140][ T28] worker_thread+0x96/0xe10 [ 67.633644][ T28] ? process_one_work+0x1690/0x1690 [ 67.638833][ T28] kthread+0x3b5/0x4a0 [ 67.642895][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.648708][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.654424][ T28] ret_from_fork+0x1f/0x30 [ 67.659410][ T28] Kernel Offset: disabled [ 67.663724][ T28] Rebooting in 86400 seconds..