[ 54.207853][ T6771] do_syscall_64+0x60/0xe0 [ 54.212274][ T6771] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 54.218164][ T6771] RIP: 0033:0x7fbe7e267687 [ 54.222571][ T6771] Code: Bad RIP value. [ 54.226634][ T6771] RSP: 002b:00007ffc7399de88 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 54.235055][ T6771] RAX: ffffffffffffffda RBX: 0000560dfa6c9985 RCX: 00007fbe7e267687 [ 54.243054][ T6771] RDX: 00007ffc7399dd50 RSI: 00000000000001ed RDI: 0000560dfa6c9985 [ 54.251031][ T6771] RBP: 00007fbe7e267680 R08: 0000000000000100 R09: 0000000000000000 [ 54.259005][ T6771] R10: 0000560dfa6c9980 R11: 0000000000000246 R12: 00000000000001ed [ 54.266984][ T6771] R13: 00007ffc7399e010 R14: 0000000000000000 R15: 0000000000000000 [ 57.303789][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 57.312897][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.318962][ T21] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 57.327221][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.337295][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 57.343283][ T21] Call Trace: [ 57.346581][ T21] dump_stack+0x18f/0x20d [ 57.350947][ T21] check_preemption_disabled+0x20d/0x220 [ 57.356592][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.361715][ T21] ? ext4_find_extent+0x81a/0xad0 [ 57.366756][ T21] ? ext4_ext_search_right+0x2ca/0xb20 [ 57.372231][ T21] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 57.377970][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 57.383271][ T21] ? ext4_ext_release+0x10/0x10 [ 57.388150][ T21] ? down_write_killable+0x170/0x170 [ 57.393443][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 57.398914][ T21] ext4_map_blocks+0x4cb/0x1640 [ 57.403783][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 57.408994][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.414547][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.420536][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 57.426012][ T21] ext4_writepages+0x1a7b/0x33c0 [ 57.430980][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.436619][ T21] ? __lock_acquire+0x2224/0x48b0 [ 57.441669][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.447662][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.453654][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.459293][ T21] ? do_writepages+0xfa/0x2a0 [ 57.463978][ T21] do_writepages+0xfa/0x2a0 [ 57.468495][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 57.474141][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.479693][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.485678][ T21] ? lock_downgrade+0x840/0x840 [ 57.490543][ T21] __writeback_single_inode+0x12a/0x13d0 [ 57.496181][ T21] ? _raw_spin_unlock+0x24/0x40 [ 57.501037][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 57.507028][ T21] writeback_sb_inodes+0x515/0xdc0 [ 57.514160][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 57.520083][ T21] __writeback_inodes_wb+0xc3/0x250 [ 57.525296][ T21] wb_writeback+0x8db/0xd50 [ 57.529815][ T21] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 57.536151][ T21] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 57.542055][ T21] ? cpumask_next+0x3c/0x40 [ 57.546562][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 57.551783][ T21] wb_workfn+0xab3/0x1090 [ 57.556124][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 57.561683][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.567236][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.573226][ T21] process_one_work+0x965/0x1690 [ 57.578180][ T21] ? lock_release+0x800/0x800 [ 57.582863][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 57.588251][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 57.593201][ T21] worker_thread+0x96/0xe10 [ 57.597724][ T21] ? process_one_work+0x1690/0x1690 [ 57.602933][ T21] kthread+0x3b5/0x4a0 [ 57.607006][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.612727][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.618458][ T21] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.1.37' (ECDSA) to the list of known hosts. 2020/06/16 01:30:46 fuzzer started 2020/06/16 01:30:46 connecting to host at 10.128.0.26:41635 2020/06/16 01:30:46 checking machine... 2020/06/16 01:30:46 checking revisions... [ 62.672958][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 62.682089][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 62.687993][ T21] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 62.696224][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.706302][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 62.712279][ T21] Call Trace: [ 62.715573][ T21] dump_stack+0x18f/0x20d [ 62.719910][ T21] check_preemption_disabled+0x20d/0x220 [ 62.725571][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 62.730727][ T21] ? ext4_find_extent+0x81a/0xad0 [ 62.735761][ T21] ? ext4_ext_search_right+0x2ca/0xb20 [ 62.741224][ T21] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 62.746955][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 62.752253][ T21] ? ext4_ext_release+0x10/0x10 [ 62.757148][ T21] ? down_write_killable+0x170/0x170 [ 62.762440][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 62.767907][ T21] ext4_map_blocks+0x4cb/0x1640 [ 62.772768][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 62.777976][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.783527][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.789506][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 62.794969][ T21] ext4_writepages+0x1a7b/0x33c0 [ 62.799930][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.805568][ T21] ? __lock_acquire+0x2224/0x48b0 [ 62.810618][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 62.816610][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 62.822595][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.828227][ T21] ? do_writepages+0xfa/0x2a0 [ 62.832903][ T21] do_writepages+0xfa/0x2a0 [ 62.837442][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 62.843093][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.848663][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.854646][ T21] ? lock_downgrade+0x840/0x840 [ 62.859503][ T21] __writeback_single_inode+0x12a/0x13d0 [ 62.865136][ T21] ? _raw_spin_unlock+0x24/0x40 2020/06/16 01:30:46 testing simple program... [ 62.869990][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 62.875984][ T21] writeback_sb_inodes+0x515/0xdc0 [ 62.881201][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 62.887133][ T21] __writeback_inodes_wb+0xc3/0x250 [ 62.892342][ T21] wb_writeback+0x8db/0xd50 [ 62.896859][ T21] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 62.903291][ T21] ? cpumask_next+0x3c/0x40 [ 62.907799][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 62.913007][ T21] wb_workfn+0x9bc/0x1090 [ 62.917953][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 62.923509][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.929058][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.935049][ T21] process_one_work+0x965/0x1690 [ 62.939685][ T6803] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6803 [ 62.939992][ T21] ? lock_release+0x800/0x800 [ 62.940019][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.949137][ T6803] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 62.953702][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 62.953730][ T21] worker_thread+0x96/0xe10 [ 62.953759][ T21] ? process_one_work+0x1690/0x1690 [ 62.953781][ T21] kthread+0x3b5/0x4a0 [ 62.983625][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.989331][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.995051][ T21] ret_from_fork+0x1f/0x30 [ 62.999649][ T6803] CPU: 1 PID: 6803 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 63.007898][ T6803] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.017982][ T6803] Call Trace: [ 63.021281][ T6803] dump_stack+0x18f/0x20d [ 63.025626][ T6803] check_preemption_disabled+0x20d/0x220 [ 63.027091][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 63.031257][ T6803] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.031289][ T6803] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.040638][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.045446][ T6803] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.045471][ T6803] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.045498][ T6803] ? ext4_ext_release+0x10/0x10 [ 63.045534][ T6803] ? down_write_killable+0x170/0x170 [ 63.077998][ T6803] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.083449][ T6803] ext4_map_blocks+0x4cb/0x1640 [ 63.088297][ T6803] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.093496][ T6803] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.099035][ T6803] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.105031][ T6803] ? prandom_u32_state+0xe/0x170 [ 63.109962][ T6803] ? __brelse+0x84/0xa0 [ 63.114123][ T6803] ? __ext4_new_inode+0x144/0x55e0 [ 63.119231][ T6803] ext4_getblk+0xad/0x520 [ 63.123551][ T6803] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.129263][ T6803] ? ext4_free_inode+0x1700/0x1700 [ 63.134385][ T6803] ext4_bread+0x7c/0x380 [ 63.138614][ T6803] ? ext4_getblk+0x520/0x520 [ 63.143202][ T6803] ? dquot_get_next_dqblk+0x180/0x180 [ 63.148583][ T6803] ext4_append+0x153/0x360 [ 63.153099][ T6803] ext4_mkdir+0x5e0/0xdf0 [ 63.157428][ T6803] ? ext4_rmdir+0xde0/0xde0 [ 63.162206][ T6803] ? security_inode_permission+0xc4/0xf0 [ 63.167832][ T6803] vfs_mkdir+0x419/0x690 [ 63.172155][ T6803] do_mkdirat+0x21e/0x280 [ 63.176475][ T6803] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.181312][ T6803] ? do_syscall_64+0x1c/0xe0 [ 63.185889][ T6803] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.191872][ T6803] do_syscall_64+0x60/0xe0 [ 63.196276][ T6803] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.202152][ T6803] RIP: 0033:0x4b02a0 [ 63.206037][ T6803] Code: Bad RIP value. [ 63.210097][ T6803] RSP: 002b:000000c00004f4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 63.218749][ T6803] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 63.226702][ T6803] RDX: 00000000000001c0 RSI: 000000c000027380 RDI: ffffffffffffff9c [ 63.234655][ T6803] RBP: 000000c00004f510 R08: 0000000000000000 R09: 0000000000000000 [ 63.242622][ T6803] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 63.250585][ T6803] R13: 000000000000009d R14: 000000000000009c R15: 0000000000000100 [ 63.258561][ T21] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 63.266817][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.276896][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 63.282883][ T21] Call Trace: [ 63.286182][ T21] dump_stack+0x18f/0x20d [ 63.290621][ T21] check_preemption_disabled+0x20d/0x220 [ 63.296269][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.298337][ T6806] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6806 [ 63.301796][ T21] ? ext4_find_extent+0x81a/0xad0 [ 63.301822][ T21] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.301838][ T21] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.301864][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.311221][ T6806] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.316231][ T21] ? ext4_ext_release+0x10/0x10 [ 63.316265][ T21] ? down_write_killable+0x170/0x170 [ 63.316281][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.316305][ T21] ext4_map_blocks+0x4cb/0x1640 [ 63.316329][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.316355][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.369652][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.375628][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 63.381088][ T21] ext4_writepages+0x1a7b/0x33c0 [ 63.386030][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.391660][ T21] ? __lock_acquire+0x2224/0x48b0 [ 63.396703][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 63.402672][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 63.408639][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.414256][ T21] ? do_writepages+0xfa/0x2a0 [ 63.418921][ T21] do_writepages+0xfa/0x2a0 [ 63.423419][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 63.429044][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.434574][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.440540][ T21] ? lock_downgrade+0x840/0x840 [ 63.445384][ T21] __writeback_single_inode+0x12a/0x13d0 [ 63.451002][ T21] ? _raw_spin_unlock+0x24/0x40 [ 63.455836][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 63.461805][ T21] writeback_sb_inodes+0x515/0xdc0 [ 63.466914][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 63.472809][ T21] __writeback_inodes_wb+0xc3/0x250 [ 63.477998][ T21] wb_writeback+0x8db/0xd50 [ 63.482507][ T21] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 63.488837][ T21] ? cpumask_next+0x3c/0x40 [ 63.493328][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 63.498517][ T21] wb_workfn+0x9bc/0x1090 [ 63.502840][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 63.508374][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.513908][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.519881][ T21] process_one_work+0x965/0x1690 [ 63.524814][ T21] ? lock_release+0x800/0x800 [ 63.529483][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 63.534843][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 63.539773][ T21] worker_thread+0x96/0xe10 [ 63.544269][ T21] ? process_one_work+0x1690/0x1690 [ 63.549452][ T21] kthread+0x3b5/0x4a0 [ 63.553506][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.559207][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.564917][ T21] ret_from_fork+0x1f/0x30 [ 63.569336][ T6806] CPU: 1 PID: 6806 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 63.577954][ T6806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.588023][ T6806] Call Trace: [ 63.589994][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 63.591319][ T6806] dump_stack+0x18f/0x20d [ 63.591345][ T6806] check_preemption_disabled+0x20d/0x220 [ 63.600466][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.604726][ T6806] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.604760][ T6806] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.626758][ T6806] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.632478][ T6806] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.637773][ T6806] ? ext4_ext_release+0x10/0x10 [ 63.642634][ T6806] ? down_write_killable+0x170/0x170 [ 63.647908][ T6806] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.653359][ T6806] ext4_map_blocks+0x4cb/0x1640 [ 63.658213][ T6806] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.663399][ T6806] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.668942][ T6806] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.674908][ T6806] ? prandom_u32_state+0xe/0x170 [ 63.679833][ T6806] ? __brelse+0x84/0xa0 [ 63.683976][ T6806] ? __ext4_new_inode+0x144/0x55e0 [ 63.689078][ T6806] ext4_getblk+0xad/0x520 [ 63.693915][ T6806] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.700077][ T6806] ? ext4_free_inode+0x1700/0x1700 [ 63.705178][ T6806] ext4_bread+0x7c/0x380 [ 63.709408][ T6806] ? ext4_getblk+0x520/0x520 [ 63.713986][ T6806] ? dquot_get_next_dqblk+0x180/0x180 [ 63.719350][ T6806] ext4_append+0x153/0x360 [ 63.723763][ T6806] ext4_mkdir+0x5e0/0xdf0 [ 63.728083][ T6806] ? ext4_rmdir+0xde0/0xde0 [ 63.732577][ T6806] ? security_inode_permission+0xc4/0xf0 [ 63.738219][ T6806] vfs_mkdir+0x419/0x690 [ 63.742451][ T6806] do_mkdirat+0x21e/0x280 [ 63.746768][ T6806] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.751794][ T6806] ? do_syscall_64+0x1c/0xe0 [ 63.756380][ T6806] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.762357][ T6806] do_syscall_64+0x60/0xe0 [ 63.766784][ T6806] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.772662][ T6806] RIP: 0033:0x45bed7 [ 63.776552][ T6806] Code: Bad RIP value. [ 63.780597][ T6806] RSP: 002b:00007ffe9c4374a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 63.789094][ T6806] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 63.797049][ T6806] RDX: 0000000000000002 RSI: 00000000000001c0 RDI: 00007ffe9c437680 [ 63.805028][ T6806] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000002c80 [ 63.812982][ T6806] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 63.820937][ T6806] R13: 00007ffe9c437680 R14: 8421084210842109 R15: 00007ffe9c43768c [ 63.828933][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.8.0-rc1-syzkaller #0 [ 63.837174][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.847243][ T1155] Call Trace: [ 63.850546][ T1155] dump_stack+0x18f/0x20d [ 63.854883][ T1155] check_preemption_disabled+0x20d/0x220 [ 63.860525][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.865651][ T1155] ? ext4_find_extent+0x81a/0xad0 [ 63.870689][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.876147][ T1155] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.881876][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.887173][ T1155] ? ext4_ext_release+0x10/0x10 [ 63.892041][ T1155] ? down_write_killable+0x170/0x170 [ 63.897330][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.902796][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 63.907656][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.912862][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.918445][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.924432][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 63.929898][ T1155] ext4_writepages+0x1a7b/0x33c0 [ 63.934841][ T1155] ? lock_release+0x7f0/0x800 [ 63.939543][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.942192][ T6807] IPVS: ftp: loaded support on port[0] = 21 [ 63.945202][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 63.956674][ T1155] ? do_writepages+0xfa/0x2a0 [ 63.961355][ T1155] do_writepages+0xfa/0x2a0 [ 63.965868][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 63.971504][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 63.976542][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 63.981746][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 63.986605][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 63.992327][ T1155] ? collapse_file+0x35a2/0x4330 [ 63.997269][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 64.000758][ T6807] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6807 [ 64.003347][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 64.003365][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.003390][ T1155] collapse_file+0x35ac/0x4330 [ 64.003422][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 64.003441][ T1155] ? khugepaged+0x2506/0x3fc0 [ 64.012844][ T6807] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.017990][ T1155] ? xas_find+0x31a/0x880 [ 64.049017][ T1155] ? check_preemption_disabled+0x38/0x220 [ 64.054724][ T1155] khugepaged+0x3041/0x3fc0 [ 64.059410][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 64.065033][ T1155] ? lock_downgrade+0x840/0x840 [ 64.069868][ T1155] ? finish_wait+0x260/0x260 [ 64.074446][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 64.080238][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.086209][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 64.091225][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 64.096842][ T1155] kthread+0x3b5/0x4a0 [ 64.100894][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.106596][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.112301][ T1155] ret_from_fork+0x1f/0x30 [ 64.116720][ T6807] CPU: 1 PID: 6807 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.125311][ T6807] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.135376][ T6807] Call Trace: [ 64.138676][ T6807] dump_stack+0x18f/0x20d [ 64.143023][ T6807] check_preemption_disabled+0x20d/0x220 [ 64.148680][ T6807] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.153825][ T6807] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.159293][ T6807] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.165040][ T6807] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.170344][ T6807] ? ext4_ext_release+0x10/0x10 [ 64.175220][ T6807] ? down_write_killable+0x170/0x170 [ 64.180519][ T6807] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.185988][ T6807] ext4_map_blocks+0x4cb/0x1640 [ 64.190856][ T6807] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.196053][ T6807] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.201597][ T6807] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.207574][ T6807] ? prandom_u32_state+0xe/0x170 [ 64.212517][ T6807] ? __brelse+0x84/0xa0 [ 64.216683][ T6807] ? __ext4_new_inode+0x144/0x55e0 [ 64.221779][ T6807] ext4_getblk+0xad/0x520 [ 64.226090][ T6807] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.231802][ T6807] ? ext4_free_inode+0x1700/0x1700 [ 64.236902][ T6807] ext4_bread+0x7c/0x380 [ 64.241122][ T6807] ? ext4_getblk+0x520/0x520 [ 64.245688][ T6807] ? dquot_get_next_dqblk+0x180/0x180 [ 64.251040][ T6807] ext4_append+0x153/0x360 [ 64.255437][ T6807] ext4_mkdir+0x5e0/0xdf0 [ 64.259745][ T6807] ? ext4_rmdir+0xde0/0xde0 [ 64.264228][ T6807] ? security_inode_permission+0xc4/0xf0 [ 64.269852][ T6807] vfs_mkdir+0x419/0x690 [ 64.274073][ T6807] do_mkdirat+0x21e/0x280 [ 64.278377][ T6807] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.283228][ T6807] ? do_syscall_64+0x1c/0xe0 [ 64.287794][ T6807] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.293752][ T6807] do_syscall_64+0x60/0xe0 [ 64.298146][ T6807] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.304014][ T6807] RIP: 0033:0x45bed7 [ 64.307878][ T6807] Code: Bad RIP value. [ 64.311917][ T6807] RSP: 002b:00007ffe9c437398 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 64.320323][ T6807] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 64.328279][ T6807] RDX: 00007ffe9c4373e3 RSI: 00000000000001ff RDI: 00007ffe9c4373e0 [ 64.336233][ T6807] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 64.344183][ T6807] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185c0 [ 64.352134][ T6807] R13: 00007ffe9c4373d0 R14: 0000000000000000 R15: 00007ffe9c4373e0 [ 64.376620][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 64.385751][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.391708][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.8.0-rc1-syzkaller #0 [ 64.399938][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.409989][ T1155] Call Trace: [ 64.413289][ T1155] dump_stack+0x18f/0x20d [ 64.417631][ T1155] check_preemption_disabled+0x20d/0x220 [ 64.423270][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.428413][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.433885][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 64.440047][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.445344][ T1155] ? ext4_ext_release+0x10/0x10 [ 64.450215][ T1155] ? down_write_killable+0x170/0x170 [ 64.455502][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.460973][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 64.465855][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.471064][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.476616][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.482591][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.488040][ T1155] ext4_writepages+0x1a7b/0x33c0 [ 64.492989][ T1155] ? lock_release+0x7f0/0x800 [ 64.497659][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.502985][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 64.503305][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.503325][ T1155] ? do_writepages+0xfa/0x2a0 [ 64.512575][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.517946][ T1155] do_writepages+0xfa/0x2a0 [ 64.532944][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 64.538576][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 64.543599][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 64.548788][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 64.553625][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 64.559328][ T1155] ? collapse_file+0x35a2/0x4330 [ 64.564248][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 64.570308][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 64.575487][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.581456][ T1155] collapse_file+0x35ac/0x4330 [ 64.586217][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 64.591571][ T1155] ? khugepaged+0x2506/0x3fc0 [ 64.596249][ T1155] ? xas_find+0x31a/0x880 [ 64.600564][ T1155] ? check_preemption_disabled+0x38/0x220 [ 64.606270][ T1155] khugepaged+0x3041/0x3fc0 [ 64.610805][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 64.616439][ T1155] ? lock_downgrade+0x840/0x840 [ 64.621279][ T1155] ? finish_wait+0x260/0x260 [ 64.625864][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 64.631659][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.637637][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 64.642649][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 64.648266][ T1155] kthread+0x3b5/0x4a0 [ 64.652323][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.658026][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.663734][ T1155] ret_from_fork+0x1f/0x30 [ 64.668154][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.676404][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.686474][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 64.692455][ T21] Call Trace: [ 64.695750][ T21] dump_stack+0x18f/0x20d [ 64.700091][ T21] check_preemption_disabled+0x20d/0x220 [ 64.705737][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.710853][ T21] ? ext4_find_extent+0x81a/0xad0 [ 64.715890][ T21] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.722302][ T21] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.728038][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.731063][ T1155] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1155 [ 64.733329][ T21] ? ext4_ext_release+0x10/0x10 [ 64.733367][ T21] ? down_write_killable+0x170/0x170 [ 64.742392][ T1155] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.747191][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.747221][ T21] ext4_map_blocks+0x4cb/0x1640 [ 64.768641][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.773838][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.779372][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.785335][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.790781][ T21] ext4_writepages+0x1a7b/0x33c0 [ 64.795724][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.801346][ T21] ? __lock_acquire+0x2224/0x48b0 [ 64.806370][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.812339][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.818308][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.823925][ T21] ? do_writepages+0xfa/0x2a0 [ 64.828588][ T21] do_writepages+0xfa/0x2a0 [ 64.833084][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 64.838713][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.844244][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.850221][ T21] ? lock_downgrade+0x840/0x840 [ 64.855063][ T21] __writeback_single_inode+0x12a/0x13d0 [ 64.860688][ T21] ? _raw_spin_unlock+0x24/0x40 [ 64.865613][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.871584][ T21] writeback_sb_inodes+0x515/0xdc0 [ 64.876691][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.882585][ T21] __writeback_inodes_wb+0xc3/0x250 [ 64.887776][ T21] wb_writeback+0x8db/0xd50 [ 64.892288][ T21] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.898620][ T21] ? cpumask_next+0x3c/0x40 [ 64.903120][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.908309][ T21] wb_workfn+0x9bc/0x1090 [ 64.912634][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 64.918169][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.923702][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.929694][ T21] process_one_work+0x965/0x1690 [ 64.934627][ T21] ? lock_release+0x800/0x800 [ 64.939292][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.944651][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 64.949580][ T21] worker_thread+0x96/0xe10 [ 64.954085][ T21] ? process_one_work+0x1690/0x1690 [ 64.959269][ T21] kthread+0x3b5/0x4a0 [ 64.963323][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.969025][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.974743][ T21] ret_from_fork+0x1f/0x30 [ 64.979163][ T1155] CPU: 0 PID: 1155 Comm: khugepaged Not tainted 5.8.0-rc1-syzkaller #0 [ 64.987404][ T1155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.997450][ T1155] Call Trace: [ 65.001409][ T1155] dump_stack+0x18f/0x20d [ 65.001839][ T6807] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6807 [ 65.005743][ T1155] check_preemption_disabled+0x20d/0x220 [ 65.015140][ T6807] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.020696][ T1155] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.031673][ T1155] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.037146][ T1155] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 65.043287][ T1155] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.048580][ T1155] ? ext4_ext_release+0x10/0x10 [ 65.053432][ T1155] ? down_write_killable+0x170/0x170 [ 65.058707][ T1155] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.064166][ T1155] ext4_map_blocks+0x4cb/0x1640 [ 65.069008][ T1155] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.074197][ T1155] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.079729][ T1155] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.085694][ T1155] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 65.091156][ T1155] ext4_writepages+0x1a7b/0x33c0 [ 65.096095][ T1155] ? lock_release+0x7f0/0x800 [ 65.101321][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.106962][ T1155] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.112586][ T1155] ? do_writepages+0xfa/0x2a0 [ 65.117248][ T1155] do_writepages+0xfa/0x2a0 [ 65.121742][ T1155] ? page_writeback_cpu_online+0x10/0x10 [ 65.127362][ T1155] ? do_raw_spin_lock+0x120/0x2d0 [ 65.132374][ T1155] ? do_raw_spin_unlock+0x171/0x260 [ 65.137560][ T1155] ? _raw_spin_unlock+0x24/0x40 [ 65.142404][ T1155] __filemap_fdatawrite_range+0x2aa/0x390 [ 65.148108][ T1155] ? collapse_file+0x35a2/0x4330 [ 65.153162][ T1155] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 65.159224][ T1155] ? _raw_spin_unlock_irq+0x1f/0x80 [ 65.164434][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.170415][ T1155] collapse_file+0x35ac/0x4330 [ 65.175199][ T1155] ? collapse_huge_page+0x4350/0x4350 [ 65.180558][ T1155] ? khugepaged+0x2506/0x3fc0 [ 65.185228][ T1155] ? xas_find+0x31a/0x880 [ 65.189543][ T1155] ? check_preemption_disabled+0x38/0x220 [ 65.195262][ T1155] khugepaged+0x3041/0x3fc0 [ 65.199769][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 65.205386][ T1155] ? lock_downgrade+0x840/0x840 [ 65.211104][ T1155] ? finish_wait+0x260/0x260 [ 65.215687][ T1155] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 65.221477][ T1155] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.227458][ T1155] ? __kthread_parkme+0x13f/0x1e0 [ 65.232467][ T1155] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 65.238090][ T1155] kthread+0x3b5/0x4a0 [ 65.242142][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.247861][ T1155] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.253568][ T1155] ret_from_fork+0x1f/0x30 [ 65.257994][ T6807] CPU: 1 PID: 6807 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.266593][ T6807] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.276646][ T6807] Call Trace: [ 65.279938][ T6807] dump_stack+0x18f/0x20d [ 65.284280][ T6807] check_preemption_disabled+0x20d/0x220 [ 65.289919][ T6807] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.295051][ T6807] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.300512][ T6807] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.306251][ T6807] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.311551][ T6807] ? ext4_ext_release+0x10/0x10 [ 65.316441][ T6807] ? down_write_killable+0x170/0x170 [ 65.321736][ T6807] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.327222][ T6807] ext4_map_blocks+0x4cb/0x1640 [ 65.332084][ T6807] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.337273][ T6807] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.342812][ T6807] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.348795][ T6807] ? prandom_u32_state+0xe/0x170 [ 65.353727][ T6807] ? __brelse+0x84/0xa0 [ 65.357868][ T6807] ? __ext4_new_inode+0x144/0x55e0 [ 65.362962][ T6807] ext4_getblk+0xad/0x520 [ 65.367298][ T6807] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.373008][ T6807] ? ext4_free_inode+0x1700/0x1700 [ 65.378361][ T6807] ext4_bread+0x7c/0x380 [ 65.382593][ T6807] ? ext4_getblk+0x520/0x520 [ 65.387162][ T6807] ? dquot_get_next_dqblk+0x180/0x180 [ 65.392526][ T6807] ext4_append+0x153/0x360 [ 65.396942][ T6807] ext4_mkdir+0x5e0/0xdf0 [ 65.401258][ T6807] ? ext4_rmdir+0xde0/0xde0 [ 65.405746][ T6807] ? security_inode_permission+0xc4/0xf0 [ 65.411383][ T6807] vfs_mkdir+0x419/0x690 [ 65.415604][ T6807] do_mkdirat+0x21e/0x280 [ 65.419914][ T6807] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.424742][ T6807] ? do_syscall_64+0x1c/0xe0 [ 65.430354][ T6807] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.436311][ T6807] do_syscall_64+0x60/0xe0 [ 65.440707][ T6807] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.446587][ T6807] RIP: 0033:0x45bed7 [ 65.450460][ T6807] Code: Bad RIP value. [ 65.454512][ T6807] RSP: 002b:00007ffe9c437398 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 65.462898][ T6807] RAX: ffffffffffffffda RBX: 000000000000fddd RCX: 000000000045bed7 [ 65.470855][ T6807] RDX: 00007ffe9c4373e3 RSI: 00000000000001ff RDI: 00007ffe9c4373e0 2020/06/16 01:30:49 building call list... [ 65.478802][ T6807] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 65.486753][ T6807] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 65.494700][ T6807] R13: 00007ffe9c4373d0 R14: 000000000000fb82 R15: 00007ffe9c4373e0 executing program [ 65.751136][ T132] tipc: TX() has been purged, node left! [ 66.264270][ T132] ================================================================== [ 66.272656][ T132] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 66.280548][ T132] Write of size 1 at addr ffff8880977fd1e4 by task kworker/u4:4/132 [ 66.288514][ T132] [ 66.290866][ T132] CPU: 1 PID: 132 Comm: kworker/u4:4 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.299439][ T132] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.309509][ T132] Workqueue: netns cleanup_net [ 66.314358][ T132] Call Trace: [ 66.317653][ T132] dump_stack+0x18f/0x20d [ 66.321987][ T132] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.327545][ T132] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.333101][ T132] ? afs_put_call+0xa40/0xa40 [ 66.337794][ T132] print_address_description.constprop.0.cold+0xd3/0x413 [ 66.345383][ T132] ? vprintk_func+0x97/0x1a6 [ 66.350412][ T132] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.355957][ T132] kasan_report.cold+0x1f/0x37 [ 66.360905][ T132] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.366728][ T132] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.372311][ T132] afs_wake_up_async_call+0x6aa/0x770 [ 66.377682][ T132] ? afs_close_socket+0x320/0x320 [ 66.383636][ T132] ? afs_put_call+0xa40/0xa40 [ 66.388340][ T132] rxrpc_notify_socket+0x1db/0x5d0 [ 66.393571][ T132] ? afs_put_call+0xa40/0xa40 [ 66.398444][ T132] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.406255][ T132] rxrpc_call_completed+0xca/0xf0 [ 66.411374][ T132] rxrpc_discard_prealloc+0x781/0xab0 [ 66.421047][ T132] ? lock_sock_nested+0x94/0x110 [ 66.426460][ T132] rxrpc_listen+0x147/0x360 [ 66.430979][ T132] afs_close_socket+0x95/0x320 [ 66.435797][ T132] ? afs_purge_servers+0x16d/0x300 [ 66.441201][ T132] ? afs_rx_discard_new_call+0x50/0x50 [ 66.448032][ T132] ? init_wait_var_entry+0x200/0x200 [ 66.453328][ T132] ? rcu_read_lock_held_common+0xa0/0xa0 [ 66.458966][ T132] ? check_preemption_disabled+0x38/0x220 [ 66.464694][ T132] afs_net_exit+0x1bc/0x310 [ 66.469293][ T132] ? afs_net_init+0xe30/0xe30 [ 66.475449][ T132] ops_exit_list.isra.0+0xa8/0x150 [ 66.480571][ T132] cleanup_net+0x511/0xa50 [ 66.485088][ T132] ? unregister_pernet_device+0x70/0x70 [ 66.490905][ T132] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.497919][ T132] process_one_work+0x965/0x1690 [ 66.502957][ T132] ? lock_release+0x800/0x800 [ 66.507686][ T132] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.513341][ T132] ? rwlock_bug.part.0+0x90/0x90 [ 66.519774][ T132] worker_thread+0x96/0xe10 [ 66.524467][ T132] ? process_one_work+0x1690/0x1690 [ 66.529674][ T132] kthread+0x3b5/0x4a0 [ 66.533744][ T132] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.539459][ T132] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.545181][ T132] ret_from_fork+0x1f/0x30 [ 66.549790][ T132] [ 66.552238][ T132] Allocated by task 6807: [ 66.556566][ T132] save_stack+0x1b/0x40 [ 66.560915][ T132] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 66.567030][ T132] kmem_cache_alloc_trace+0x153/0x7d0 [ 66.572483][ T132] afs_alloc_call+0x55/0x630 [ 66.577160][ T132] afs_charge_preallocation+0xe9/0x2d0 [ 66.582820][ T132] afs_open_socket+0x292/0x360 [ 66.587590][ T132] afs_net_init+0xa6c/0xe30 [ 66.593285][ T132] ops_init+0xaf/0x420 [ 66.597854][ T132] setup_net+0x2de/0x860 [ 66.602505][ T132] copy_net_ns+0x293/0x590 [ 66.606928][ T132] create_new_namespaces+0x3fb/0xb30 [ 66.613057][ T132] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 66.619042][ T132] ksys_unshare+0x43d/0x8e0 [ 66.623546][ T132] __x64_sys_unshare+0x2d/0x40 [ 66.628307][ T132] do_syscall_64+0x60/0xe0 [ 66.633068][ T132] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.638947][ T132] [ 66.641273][ T132] Freed by task 132: [ 66.645180][ T132] save_stack+0x1b/0x40 [ 66.649332][ T132] __kasan_slab_free+0xf7/0x140 [ 66.654181][ T132] kfree+0x109/0x2b0 [ 66.658081][ T132] afs_put_call+0x585/0xa40 [ 66.662593][ T132] rxrpc_discard_prealloc+0x764/0xab0 [ 66.667961][ T132] rxrpc_listen+0x147/0x360 [ 66.672633][ T132] afs_close_socket+0x95/0x320 [ 66.677477][ T132] afs_net_exit+0x1bc/0x310 [ 66.682016][ T132] ops_exit_list.isra.0+0xa8/0x150 [ 66.687225][ T132] cleanup_net+0x511/0xa50 [ 66.691638][ T132] process_one_work+0x965/0x1690 [ 66.696612][ T132] worker_thread+0x96/0xe10 [ 66.701727][ T132] kthread+0x3b5/0x4a0 [ 66.705797][ T132] ret_from_fork+0x1f/0x30 [ 66.710359][ T132] [ 66.712684][ T132] The buggy address belongs to the object at ffff8880977fd000 [ 66.712684][ T132] which belongs to the cache kmalloc-1k of size 1024 [ 66.726817][ T132] The buggy address is located 484 bytes inside of [ 66.726817][ T132] 1024-byte region [ffff8880977fd000, ffff8880977fd400) [ 66.740161][ T132] The buggy address belongs to the page: [ 66.745793][ T132] page:ffffea00025dff40 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880977fd800 [ 66.756192][ T132] flags: 0xfffe0000000200(slab) [ 66.761046][ T132] raw: 00fffe0000000200 ffffea00028adc08 ffffea00027f51c8 ffff8880aa000c40 [ 66.769628][ T132] raw: ffff8880977fd800 ffff8880977fd000 0000000100000001 0000000000000000 [ 66.778207][ T132] page dumped because: kasan: bad access detected [ 66.784604][ T132] [ 66.786924][ T132] Memory state around the buggy address: [ 66.792547][ T132] ffff8880977fd080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.800600][ T132] ffff8880977fd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.808662][ T132] >ffff8880977fd180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.816711][ T132] ^ [ 66.823898][ T132] ffff8880977fd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.831954][ T132] ffff8880977fd280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.840019][ T132] ================================================================== [ 66.848067][ T132] Disabling lock debugging due to kernel taint [ 66.854275][ T132] Kernel panic - not syncing: panic_on_warn set ... [ 66.860863][ T132] CPU: 1 PID: 132 Comm: kworker/u4:4 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 66.870565][ T132] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.880642][ T132] Workqueue: netns cleanup_net [ 66.885397][ T132] Call Trace: [ 66.888690][ T132] dump_stack+0x18f/0x20d [ 66.893021][ T132] ? afs_wake_up_async_call+0x670/0x770 [ 66.898563][ T132] ? afs_put_call+0xa40/0xa40 [ 66.903264][ T132] panic+0x2e3/0x75c [ 66.907167][ T132] ? __warn_printk+0xf3/0xf3 [ 66.911770][ T132] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 66.918353][ T132] ? trace_hardirqs_on+0x55/0x220 [ 66.923363][ T132] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.928982][ T132] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.934525][ T132] ? afs_put_call+0xa40/0xa40 [ 66.939190][ T132] end_report+0x4d/0x53 [ 66.943335][ T132] kasan_report.cold+0xd/0x37 [ 66.948010][ T132] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.953623][ T132] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.959155][ T132] afs_wake_up_async_call+0x6aa/0x770 [ 66.964516][ T132] ? afs_close_socket+0x320/0x320 [ 66.969533][ T132] ? afs_put_call+0xa40/0xa40 [ 66.974196][ T132] rxrpc_notify_socket+0x1db/0x5d0 [ 66.979295][ T132] ? afs_put_call+0xa40/0xa40 [ 66.984144][ T132] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.990557][ T132] rxrpc_call_completed+0xca/0xf0 [ 66.995563][ T132] rxrpc_discard_prealloc+0x781/0xab0 [ 67.001571][ T132] ? lock_sock_nested+0x94/0x110 [ 67.006495][ T132] rxrpc_listen+0x147/0x360 [ 67.011115][ T132] afs_close_socket+0x95/0x320 [ 67.015873][ T132] ? afs_purge_servers+0x16d/0x300 [ 67.020977][ T132] ? afs_rx_discard_new_call+0x50/0x50 [ 67.026442][ T132] ? init_wait_var_entry+0x200/0x200 [ 67.031722][ T132] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.037784][ T132] ? check_preemption_disabled+0x38/0x220 [ 67.043483][ T132] afs_net_exit+0x1bc/0x310 [ 67.047965][ T132] ? afs_net_init+0xe30/0xe30 [ 67.052636][ T132] ops_exit_list.isra.0+0xa8/0x150 [ 67.057737][ T132] cleanup_net+0x511/0xa50 [ 67.062167][ T132] ? unregister_pernet_device+0x70/0x70 [ 67.067700][ T132] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.073704][ T132] process_one_work+0x965/0x1690 [ 67.078639][ T132] ? lock_release+0x800/0x800 [ 67.083306][ T132] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.088695][ T132] ? rwlock_bug.part.0+0x90/0x90 [ 67.093619][ T132] worker_thread+0x96/0xe10 [ 67.098112][ T132] ? process_one_work+0x1690/0x1690 [ 67.103816][ T132] kthread+0x3b5/0x4a0 [ 67.107891][ T132] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.113602][ T132] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.119315][ T132] ret_from_fork+0x1f/0x30 [ 67.125215][ T132] Kernel Offset: disabled [ 67.129532][ T132] Rebooting in 86400 seconds..