[ 57.801521][ T37] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:3/37 [ 57.810643][ T37] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.816681][ T37] CPU: 0 PID: 37 Comm: kworker/u4:3 Not tainted 5.8.0-rc1-syzkaller #0 [ 57.824927][ T37] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.835694][ T37] Workqueue: writeback wb_workfn (flush-8:0) [ 57.835718][ T37] Call Trace: [ 57.835739][ T37] dump_stack+0x18f/0x20d [ 57.835764][ T37] check_preemption_disabled+0x20d/0x220 [ 57.835784][ T37] ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.835805][ T37] ? ext4_find_extent+0x81a/0xad0 [ 57.835832][ T37] ? ext4_ext_search_right+0x2ca/0xb20 [ 57.835848][ T37] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 57.835876][ T37] ext4_ext_map_blocks+0x201b/0x33e0 [ 57.835905][ T37] ? ext4_ext_release+0x10/0x10 [ 57.835942][ T37] ? down_write_killable+0x170/0x170 [ 57.835955][ T37] ? ext4_es_lookup_extent+0x41d/0xd10 [ 57.835974][ T37] ext4_map_blocks+0x4cb/0x1640 [ 57.835997][ T37] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 57.836020][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.836037][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.836053][ T37] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 57.836073][ T37] ext4_writepages+0x1a7b/0x33c0 [ 57.836110][ T37] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.836124][ T37] ? __lock_acquire+0x2224/0x48b0 [ 57.836154][ T37] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.836174][ T37] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.836193][ T37] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.836209][ T37] ? do_writepages+0xfa/0x2a0 [ 57.836224][ T37] do_writepages+0xfa/0x2a0 [ 57.836246][ T37] ? page_writeback_cpu_online+0x10/0x10 [ 57.836267][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.836284][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.836299][ T37] ? lock_downgrade+0x840/0x840 [ 57.836319][ T37] __writeback_single_inode+0x12a/0x13d0 [ 57.836335][ T37] ? _raw_spin_unlock+0x24/0x40 [ 57.836351][ T37] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 57.836371][ T37] writeback_sb_inodes+0x515/0xdc0 [ 57.836398][ T37] ? __writeback_single_inode+0x13d0/0x13d0 [ 57.836432][ T37] __writeback_inodes_wb+0xc3/0x250 [ 57.836455][ T37] wb_writeback+0x8db/0xd50 [ 57.836480][ T37] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 57.836499][ T37] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 57.836518][ T37] ? cpumask_next+0x3c/0x40 [ 57.836535][ T37] ? get_nr_dirty_inodes+0xd6/0x130 [ 57.836556][ T37] wb_workfn+0xab3/0x1090 [ 57.836578][ T37] ? inode_wait_for_writeback+0x30/0x30 [ 57.836599][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.836616][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.836639][ T37] process_one_work+0x965/0x1690 [ 57.836661][ T37] ? lock_release+0x800/0x800 [ 57.836677][ T37] ? pwq_dec_nr_in_flight+0x310/0x310 [ 57.836697][ T37] ? rwlock_bug.part.0+0x90/0x90 [ 57.836721][ T37] worker_thread+0x96/0xe10 [ 57.836746][ T37] ? process_one_work+0x1690/0x1690 [ 57.836763][ T37] kthread+0x3b5/0x4a0 [ 57.836777][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.836791][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.836810][ T37] ret_from_fork+0x1f/0x30 [ 57.910123][ T37] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:3/37 [ 58.070005][ T6754] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6754 [ 58.076217][ T37] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.076235][ T37] CPU: 0 PID: 37 Comm: kworker/u4:3 Not tainted 5.8.0-rc1-syzkaller #0 [ 58.076244][ T37] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.076259][ T37] Workqueue: writeback wb_workfn (flush-8:0) [ 58.081546][ T6754] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.085966][ T37] Call Trace: [ 58.240434][ T37] dump_stack+0x18f/0x20d [ 58.240458][ T37] check_preemption_disabled+0x20d/0x220 [ 58.240478][ T37] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.240496][ T37] ? ext4_find_extent+0x81a/0xad0 [ 58.240517][ T37] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.240531][ T37] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.240552][ T37] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.240574][ T37] ? ext4_ext_release+0x10/0x10 [ 58.240603][ T37] ? down_write_killable+0x170/0x170 [ 58.240615][ T37] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.240634][ T37] ext4_map_blocks+0x4cb/0x1640 [ 58.240654][ T37] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.240675][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.240689][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.240702][ T37] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.240719][ T37] ext4_writepages+0x1a7b/0x33c0 [ 58.240802][ T37] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.240816][ T37] ? __lock_acquire+0x2224/0x48b0 [ 58.240842][ T37] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.240860][ T37] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.240877][ T37] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.240891][ T37] ? do_writepages+0xfa/0x2a0 [ 58.240903][ T37] do_writepages+0xfa/0x2a0 [ 58.240922][ T37] ? page_writeback_cpu_online+0x10/0x10 [ 58.240941][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.240955][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.240968][ T37] ? lock_downgrade+0x840/0x840 [ 58.240987][ T37] __writeback_single_inode+0x12a/0x13d0 [ 58.241000][ T37] ? _raw_spin_unlock+0x24/0x40 [ 58.241014][ T37] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 58.241030][ T37] writeback_sb_inodes+0x515/0xdc0 [ 58.241055][ T37] ? __writeback_single_inode+0x13d0/0x13d0 [ 58.241084][ T37] __writeback_inodes_wb+0xc3/0x250 [ 58.241104][ T37] wb_writeback+0x8db/0xd50 [ 58.241126][ T37] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 58.241146][ T37] ? cpumask_next+0x3c/0x40 [ 58.241161][ T37] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.241179][ T37] wb_workfn+0x9bc/0x1090 [ 58.241199][ T37] ? inode_wait_for_writeback+0x30/0x30 [ 58.241217][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.241232][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.241252][ T37] process_one_work+0x965/0x1690 [ 58.241273][ T37] ? lock_release+0x800/0x800 [ 58.241286][ T37] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.241302][ T37] ? rwlock_bug.part.0+0x90/0x90 [ 58.241323][ T37] worker_thread+0x96/0xe10 [ 58.241346][ T37] ? process_one_work+0x1690/0x1690 [ 58.241360][ T37] kthread+0x3b5/0x4a0 [ 58.241372][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.241384][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.241400][ T37] ret_from_fork+0x1f/0x30 [ 58.241432][ T6754] CPU: 1 PID: 6754 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 58.241442][ T6754] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.241447][ T6754] Call Trace: [ 58.241463][ T6754] dump_stack+0x18f/0x20d [ 58.241482][ T6754] check_preemption_disabled+0x20d/0x220 [ 58.241497][ T6754] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.241521][ T6754] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.241536][ T6754] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.241557][ T6754] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.241581][ T6754] ? ext4_ext_release+0x10/0x10 [ 58.241612][ T6754] ? down_write_killable+0x170/0x170 [ 58.241626][ T6754] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.241648][ T6754] ext4_map_blocks+0x4cb/0x1640 [ 58.241671][ T6754] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.241685][ T6754] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.241704][ T6754] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.241719][ T6754] ? prandom_u32_state+0xe/0x170 [ 58.241738][ T6754] ? __brelse+0x84/0xa0 [ 58.241754][ T6754] ? __ext4_new_inode+0x144/0x55e0 [ 58.241771][ T6754] ext4_getblk+0xad/0x520 [ 58.241788][ T6754] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 58.241810][ T6754] ? ext4_free_inode+0x1700/0x1700 [ 58.241831][ T6754] ext4_bread+0x7c/0x380 [ 58.241847][ T6754] ? ext4_getblk+0x520/0x520 [ 58.241865][ T6754] ? dquot_get_next_dqblk+0x180/0x180 [ 58.241889][ T6754] ext4_append+0x153/0x360 [ 58.241908][ T6754] ext4_mkdir+0x5e0/0xdf0 [ 58.241930][ T6754] ? ext4_rmdir+0xde0/0xde0 [ 58.241948][ T6754] ? security_inode_permission+0xc4/0xf0 [ 58.241972][ T6754] vfs_mkdir+0x419/0x690 [ 58.241993][ T6754] do_mkdirat+0x21e/0x280 [ 58.242012][ T6754] ? __ia32_sys_mknod+0xb0/0xb0 [ 58.242028][ T6754] ? do_syscall_64+0x1c/0xe0 [ 58.242043][ T6754] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.242061][ T6754] do_syscall_64+0x60/0xe0 [ 58.242079][ T6754] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.242092][ T6754] RIP: 0033:0x7f363155c687 [ 58.242098][ T6754] Code: Bad RIP value. [ 58.242107][ T6754] RSP: 002b:00007ffdc0908ca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 58.242122][ T6754] RAX: ffffffffffffffda RBX: 0000563dcda14985 RCX: 00007f363155c687 [ 58.242132][ T6754] RDX: 00007ffdc0908b70 RSI: 00000000000001ed RDI: 0000563dcda14985 [ 58.242141][ T6754] RBP: 00007f363155c680 R08: 0000000000000100 R09: 0000000000000000 [ 58.242151][ T6754] R10: 0000563dcda14980 R11: 0000000000000246 R12: 00000000000001ed [ 58.242160][ T6754] R13: 00007ffdc0908e30 R14: 0000000000000000 R15: 0000000000000000 [ 58.343499][ T37] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:3/37 [ 58.811152][ T37] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.811171][ T37] CPU: 1 PID: 37 Comm: kworker/u4:3 Not tainted 5.8.0-rc1-syzkaller #0 [ 58.811179][ T37] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.811197][ T37] Workqueue: writeback wb_workfn (flush-8:0) [ 58.841316][ T37] Call Trace: [ 58.841338][ T37] dump_stack+0x18f/0x20d [ 58.841362][ T37] check_preemption_disabled+0x20d/0x220 [ 58.841379][ T37] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.841399][ T37] ? ext4_find_extent+0x81a/0xad0 [ 58.841424][ T37] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.841441][ T37] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.841468][ T37] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.841496][ T37] ? ext4_ext_release+0x10/0x10 [ 58.841531][ T37] ? down_write_killable+0x170/0x170 [ 58.841546][ T37] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.841572][ T37] ext4_map_blocks+0x4cb/0x1640 [ 58.841599][ T37] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.841628][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.841648][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.841671][ T37] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.841695][ T37] ext4_writepages+0x1a7b/0x33c0 [ 58.841739][ T37] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.841755][ T37] ? __lock_acquire+0x2224/0x48b0 [ 58.841789][ T37] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.841809][ T37] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.841828][ T37] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.841843][ T37] ? do_writepages+0xfa/0x2a0 [ 58.841857][ T37] do_writepages+0xfa/0x2a0 [ 58.841879][ T37] ? page_writeback_cpu_online+0x10/0x10 [ 58.841901][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.841919][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.841935][ T37] ? lock_downgrade+0x840/0x840 [ 58.841958][ T37] __writeback_single_inode+0x12a/0x13d0 [ 58.841976][ T37] ? _raw_spin_unlock+0x24/0x40 [ 58.841994][ T37] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 58.842014][ T37] writeback_sb_inodes+0x515/0xdc0 [ 58.842046][ T37] ? __writeback_single_inode+0x13d0/0x13d0 [ 58.842084][ T37] __writeback_inodes_wb+0xc3/0x250 [ 58.842109][ T37] wb_writeback+0x8db/0xd50 [ 58.842136][ T37] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 58.842164][ T37] ? cpumask_next+0x3c/0x40 [ 58.842181][ T37] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.842205][ T37] wb_workfn+0x9bc/0x1090 [ 58.842232][ T37] ? inode_wait_for_writeback+0x30/0x30 [ 58.842256][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.842275][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.842301][ T37] process_one_work+0x965/0x1690 [ 58.842328][ T37] ? lock_release+0x800/0x800 [ 58.842346][ T37] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.842367][ T37] ? rwlock_bug.part.0+0x90/0x90 [ 58.842392][ T37] worker_thread+0x96/0xe10 [ 58.842422][ T37] ? process_one_work+0x1690/0x1690 [ 58.842441][ T37] kthread+0x3b5/0x4a0 [ 58.842457][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.842473][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.842494][ T37] ret_from_fork+0x1f/0x30 [ 58.921940][ T37] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:3/37 [ 59.162565][ T37] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.162583][ T37] CPU: 0 PID: 37 Comm: kworker/u4:3 Not tainted 5.8.0-rc1-syzkaller #0 [ 59.162597][ T37] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.186776][ T37] Workqueue: writeback wb_workfn (flush-8:0) [ 59.186788][ T37] Call Trace: [ 59.186809][ T37] dump_stack+0x18f/0x20d [ 59.186832][ T37] check_preemption_disabled+0x20d/0x220 [ 59.186850][ T37] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.186869][ T37] ? ext4_find_extent+0x81a/0xad0 [ 59.186894][ T37] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.186911][ T37] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.186936][ T37] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.186965][ T37] ? ext4_ext_release+0x10/0x10 [ 59.186999][ T37] ? down_write_killable+0x170/0x170 [ 59.187015][ T37] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.187041][ T37] ext4_map_blocks+0x4cb/0x1640 [ 59.187067][ T37] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.187093][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.187112][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.187130][ T37] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 59.187151][ T37] ext4_writepages+0x1a7b/0x33c0 [ 59.187193][ T37] ? __ext4_mark_inode_dirty+0x940/0x940 [ 59.187209][ T37] ? __lock_acquire+0x2224/0x48b0 [ 59.187242][ T37] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 59.187264][ T37] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 59.187282][ T37] ? __ext4_mark_inode_dirty+0x940/0x940 [ 59.187297][ T37] ? do_writepages+0xfa/0x2a0 [ 59.187311][ T37] do_writepages+0xfa/0x2a0 [ 59.187333][ T37] ? page_writeback_cpu_online+0x10/0x10 [ 59.187355][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.187372][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.187386][ T37] ? lock_downgrade+0x840/0x840 [ 59.187408][ T37] __writeback_single_inode+0x12a/0x13d0 [ 59.187425][ T37] ? _raw_spin_unlock+0x24/0x40 [ 59.187442][ T37] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 59.187464][ T37] writeback_sb_inodes+0x515/0xdc0 [ 59.187494][ T37] ? __writeback_single_inode+0x13d0/0x13d0 [ 59.187533][ T37] __writeback_inodes_wb+0xc3/0x250 [ 59.187556][ T37] wb_writeback+0x8db/0xd50 [ 59.187583][ T37] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 59.187602][ T37] ? cpumask_next+0x3c/0x40 [ 59.187616][ T37] ? get_nr_dirty_inodes+0xd6/0x130 [ 59.187634][ T37] wb_workfn+0x9bc/0x1090 [ 59.187689][ T37] ? inode_wait_for_writeback+0x30/0x30 [ 59.187708][ T37] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.187723][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.187743][ T37] process_one_work+0x965/0x1690 [ 59.187764][ T37] ? lock_release+0x800/0x800 [ 59.187777][ T37] ? pwq_dec_nr_in_flight+0x310/0x310 [ 59.187794][ T37] ? rwlock_bug.part.0+0x90/0x90 [ 59.187816][ T37] worker_thread+0x96/0xe10 [ 59.187839][ T37] ? process_one_work+0x1690/0x1690 [ 59.187856][ T37] kthread+0x3b5/0x4a0 [ 59.187871][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.187886][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.187905][ T37] ret_from_fork+0x1f/0x30 Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.15.197' (ECDSA) to the list of known hosts. 2020/06/16 05:55:20 fuzzer started 2020/06/16 05:55:20 connecting to host at 10.128.0.26:40905 2020/06/16 05:55:20 checking machine... 2020/06/16 05:55:20 checking revisions... 2020/06/16 05:55:21 testing simple program... syzkaller login: [ 63.309987][ T6827] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6827 [ 63.319167][ T6827] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.325253][ T6827] CPU: 1 PID: 6827 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 63.333523][ T6827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.343839][ T6827] Call Trace: [ 63.347121][ T6827] dump_stack+0x18f/0x20d [ 63.351449][ T6827] check_preemption_disabled+0x20d/0x220 [ 63.357064][ T6827] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.362166][ T6827] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.367886][ T6827] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.374561][ T6827] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.379848][ T6827] ? ext4_ext_release+0x10/0x10 [ 63.384888][ T6827] ? down_write_killable+0x170/0x170 [ 63.390177][ T6827] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.395657][ T6827] ext4_map_blocks+0x4cb/0x1640 [ 63.400536][ T6827] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.405743][ T6827] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.411299][ T6827] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.417295][ T6827] ? prandom_u32_state+0xe/0x170 [ 63.422254][ T6827] ? __brelse+0x84/0xa0 [ 63.426438][ T6827] ? __ext4_new_inode+0x144/0x55e0 [ 63.431585][ T6827] ext4_getblk+0xad/0x520 [ 63.435931][ T6827] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.441756][ T6827] ? ext4_free_inode+0x1700/0x1700 [ 63.446898][ T6827] ext4_bread+0x7c/0x380 [ 63.451182][ T6827] ? ext4_getblk+0x520/0x520 [ 63.455782][ T6827] ? dquot_get_next_dqblk+0x180/0x180 [ 63.461256][ T6827] ext4_append+0x153/0x360 [ 63.465688][ T6827] ext4_mkdir+0x5e0/0xdf0 [ 63.470044][ T6827] ? ext4_rmdir+0xde0/0xde0 [ 63.474567][ T6827] ? security_inode_permission+0xc4/0xf0 [ 63.480188][ T6827] vfs_mkdir+0x419/0x690 [ 63.484431][ T6827] do_mkdirat+0x21e/0x280 [ 63.488751][ T6827] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.493586][ T6827] ? do_syscall_64+0x1c/0xe0 [ 63.498158][ T6827] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.504135][ T6827] do_syscall_64+0x60/0xe0 [ 63.508553][ T6827] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.514881][ T6827] RIP: 0033:0x4b02a0 [ 63.518748][ T6827] Code: Bad RIP value. [ 63.522792][ T6827] RSP: 002b:000000c0000dd4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 63.531298][ T6827] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 63.539261][ T6827] RDX: 00000000000001c0 RSI: 000000c00009cfe0 RDI: ffffffffffffff9c [ 63.547227][ T6827] RBP: 000000c0000dd510 R08: 0000000000000000 R09: 0000000000000000 [ 63.555265][ T6827] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000 [ 63.563218][ T6827] R13: 0000000000000080 R14: 000000000000007f R15: 0000000000000100 [ 63.592266][ T6840] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6840 [ 63.601806][ T6840] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.607696][ T6840] CPU: 0 PID: 6840 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 63.616376][ T6840] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.626725][ T6840] Call Trace: [ 63.630038][ T6840] dump_stack+0x18f/0x20d [ 63.634362][ T6840] check_preemption_disabled+0x20d/0x220 [ 63.640165][ T6840] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.646152][ T6840] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.651612][ T6840] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.657356][ T6840] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.662650][ T6840] ? ext4_ext_release+0x10/0x10 [ 63.667581][ T6840] ? down_write_killable+0x170/0x170 [ 63.672850][ T6840] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.678294][ T6840] ext4_map_blocks+0x4cb/0x1640 [ 63.684217][ T6840] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.689591][ T6840] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.695786][ T6840] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.701907][ T6840] ? prandom_u32_state+0xe/0x170 [ 63.707011][ T6840] ? __brelse+0x84/0xa0 [ 63.711154][ T6840] ? __ext4_new_inode+0x144/0x55e0 [ 63.716256][ T6840] ext4_getblk+0xad/0x520 [ 63.720592][ T6840] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.726309][ T6840] ? ext4_free_inode+0x1700/0x1700 [ 63.731431][ T6840] ext4_bread+0x7c/0x380 [ 63.735666][ T6840] ? ext4_getblk+0x520/0x520 [ 63.740308][ T6840] ? dquot_get_next_dqblk+0x180/0x180 [ 63.745698][ T6840] ext4_append+0x153/0x360 [ 63.750110][ T6840] ext4_mkdir+0x5e0/0xdf0 [ 63.754432][ T6840] ? ext4_rmdir+0xde0/0xde0 [ 63.758932][ T6840] ? security_inode_permission+0xc4/0xf0 [ 63.764595][ T6840] vfs_mkdir+0x419/0x690 [ 63.768834][ T6840] do_mkdirat+0x21e/0x280 [ 63.773159][ T6840] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.778021][ T6840] ? do_syscall_64+0x1c/0xe0 [ 63.782602][ T6840] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.788573][ T6840] do_syscall_64+0x60/0xe0 [ 63.793051][ T6840] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.798938][ T6840] RIP: 0033:0x45bed7 [ 63.802906][ T6840] Code: Bad RIP value. [ 63.806964][ T6840] RSP: 002b:00007fff6a64c0f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 63.815377][ T6840] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 63.823334][ T6840] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007fff6a64c2d0 [ 63.831286][ T6840] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003280 [ 63.839238][ T6840] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 63.847191][ T6840] R13: 00007fff6a64c2d0 R14: 8421084210842109 R15: 00007fff6a64c2dc [ 63.939793][ T6841] IPVS: ftp: loaded support on port[0] = 21 [ 63.978206][ T6841] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6841 [ 63.987741][ T6841] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.993700][ T6841] CPU: 1 PID: 6841 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.002283][ T6841] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.012331][ T6841] Call Trace: [ 64.015669][ T6841] dump_stack+0x18f/0x20d [ 64.020066][ T6841] check_preemption_disabled+0x20d/0x220 [ 64.026121][ T6841] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.031226][ T6841] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.036675][ T6841] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.042404][ T6841] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.047682][ T6841] ? ext4_ext_release+0x10/0x10 [ 64.052621][ T6841] ? down_write_killable+0x170/0x170 [ 64.058496][ T6841] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.063969][ T6841] ext4_map_blocks+0x4cb/0x1640 [ 64.068806][ T6841] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.074005][ T6841] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.082067][ T6841] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.088022][ T6841] ? prandom_u32_state+0xe/0x170 [ 64.092940][ T6841] ? __brelse+0x84/0xa0 [ 64.097075][ T6841] ? __ext4_new_inode+0x144/0x55e0 [ 64.102251][ T6841] ext4_getblk+0xad/0x520 [ 64.106570][ T6841] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.112300][ T6841] ? ext4_free_inode+0x1700/0x1700 [ 64.117473][ T6841] ext4_bread+0x7c/0x380 [ 64.122254][ T6841] ? ext4_getblk+0x520/0x520 [ 64.126870][ T6841] ? dquot_get_next_dqblk+0x180/0x180 [ 64.132240][ T6841] ext4_append+0x153/0x360 [ 64.136752][ T6841] ext4_mkdir+0x5e0/0xdf0 [ 64.141243][ T6841] ? ext4_rmdir+0xde0/0xde0 [ 64.146348][ T6841] ? security_inode_permission+0xc4/0xf0 [ 64.152059][ T6841] vfs_mkdir+0x419/0x690 [ 64.156286][ T6841] do_mkdirat+0x21e/0x280 [ 64.160600][ T6841] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.165537][ T6841] ? do_syscall_64+0x1c/0xe0 [ 64.170457][ T6841] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.176419][ T6841] do_syscall_64+0x60/0xe0 [ 64.180822][ T6841] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.186711][ T6841] RIP: 0033:0x45bed7 [ 64.190581][ T6841] Code: Bad RIP value. [ 64.194649][ T6841] RSP: 002b:00007fff6a64bfe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 64.203497][ T6841] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 64.211464][ T6841] RDX: 00007fff6a64c033 RSI: 00000000000001ff RDI: 00007fff6a64c030 [ 64.219692][ T6841] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 64.227653][ T6841] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185c0 [ 64.235881][ T6841] R13: 00007fff6a64c020 R14: 0000000000000000 R15: 00007fff6a64c030 [ 64.279856][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 64.289246][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.295245][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.303481][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.313559][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 64.320172][ T21] Call Trace: [ 64.323496][ T21] dump_stack+0x18f/0x20d [ 64.327830][ T21] check_preemption_disabled+0x20d/0x220 [ 64.333464][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.338621][ T21] ? ext4_find_extent+0x81a/0xad0 [ 64.343665][ T21] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.349140][ T21] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.354888][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.360207][ T21] ? ext4_ext_release+0x10/0x10 [ 64.365088][ T21] ? down_write_killable+0x170/0x170 [ 64.370495][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.375948][ T21] ext4_map_blocks+0x4cb/0x1640 [ 64.380809][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.382657][ T6841] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6841 [ 64.386041][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.395478][ T6841] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.400994][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.401011][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.401033][ T21] ext4_writepages+0x1a7b/0x33c0 [ 64.401080][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.428934][ T21] ? __lock_acquire+0x2224/0x48b0 [ 64.433962][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.440014][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.445980][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.451949][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.457580][ T21] ? do_writepages+0xfa/0x2a0 [ 64.462329][ T21] do_writepages+0xfa/0x2a0 [ 64.466839][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 64.472666][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.478199][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.484164][ T21] ? lock_downgrade+0x840/0x840 [ 64.489016][ T21] __writeback_single_inode+0x12a/0x13d0 [ 64.494641][ T21] ? _raw_spin_unlock+0x24/0x40 [ 64.499489][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 64.505456][ T21] writeback_sb_inodes+0x515/0xdc0 [ 64.510563][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 64.516458][ T21] __writeback_inodes_wb+0xc3/0x250 [ 64.521649][ T21] wb_writeback+0x8db/0xd50 [ 64.526167][ T21] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 64.532481][ T21] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 64.538373][ T21] ? cpumask_next+0x3c/0x40 [ 64.542873][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 64.548059][ T21] wb_workfn+0xab3/0x1090 [ 64.552380][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 64.557915][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.563445][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.569436][ T21] process_one_work+0x965/0x1690 [ 64.574375][ T21] ? lock_release+0x800/0x800 [ 64.579037][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.584395][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 64.589360][ T21] worker_thread+0x96/0xe10 [ 64.593858][ T21] ? process_one_work+0x1690/0x1690 [ 64.599055][ T21] kthread+0x3b5/0x4a0 [ 64.603109][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.608821][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.614529][ T21] ret_from_fork+0x1f/0x30 [ 64.618946][ T6841] CPU: 0 PID: 6841 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.627539][ T6841] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.637599][ T6841] Call Trace: [ 64.641069][ T6841] dump_stack+0x18f/0x20d [ 64.645200][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 64.645409][ T6841] check_preemption_disabled+0x20d/0x220 [ 64.654949][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.660474][ T6841] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.660504][ T6841] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.660521][ T6841] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.660545][ T6841] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.660572][ T6841] ? ext4_ext_release+0x10/0x10 [ 64.692824][ T6841] ? down_write_killable+0x170/0x170 [ 64.698119][ T6841] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.703569][ T6841] ext4_map_blocks+0x4cb/0x1640 [ 64.708412][ T6841] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.713600][ T6841] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.719131][ T6841] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.725100][ T6841] ? prandom_u32_state+0xe/0x170 [ 64.730025][ T6841] ? __brelse+0x84/0xa0 [ 64.734166][ T6841] ? __ext4_new_inode+0x144/0x55e0 [ 64.739381][ T6841] ext4_getblk+0xad/0x520 [ 64.743713][ T6841] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.749430][ T6841] ? ext4_free_inode+0x1700/0x1700 [ 64.754552][ T6841] ext4_bread+0x7c/0x380 [ 64.759740][ T6841] ? ext4_getblk+0x520/0x520 [ 64.764318][ T6841] ? dquot_get_next_dqblk+0x180/0x180 [ 64.769684][ T6841] ext4_append+0x153/0x360 [ 64.774096][ T6841] ext4_mkdir+0x5e0/0xdf0 [ 64.778435][ T6841] ? ext4_rmdir+0xde0/0xde0 [ 64.782935][ T6841] ? security_inode_permission+0xc4/0xf0 [ 64.788583][ T6841] vfs_mkdir+0x419/0x690 [ 64.792836][ T6841] do_mkdirat+0x21e/0x280 [ 64.797156][ T6841] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.801994][ T6841] ? do_syscall_64+0x1c/0xe0 [ 64.806572][ T6841] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.812541][ T6841] do_syscall_64+0x60/0xe0 [ 64.816945][ T6841] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.822821][ T6841] RIP: 0033:0x45bed7 [ 64.826701][ T6841] Code: Bad RIP value. [ 64.830749][ T6841] RSP: 002b:00007fff6a64bfe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 64.839145][ T6841] RAX: ffffffffffffffda RBX: 000000000000fb1c RCX: 000000000045bed7 [ 64.847124][ T6841] RDX: 00007fff6a64c033 RSI: 00000000000001ff RDI: 00007fff6a64c030 [ 64.855094][ T6841] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 64.863052][ T6841] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 64.871011][ T6841] R13: 00007fff6a64c020 R14: 000000000000fb16 R15: 00007fff6a64c030 [ 64.878990][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.887250][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.897325][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 64.903327][ T21] Call Trace: [ 64.906625][ T21] dump_stack+0x18f/0x20d [ 64.910966][ T21] check_preemption_disabled+0x20d/0x220 [ 64.916782][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.921905][ T21] ? ext4_find_extent+0x81a/0xad0 [ 64.926966][ T21] ? ext4_ext_search_right+0x2ca/0xb20 2020/06/16 05:55:22 building call list... [ 64.932439][ T21] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.938177][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.943507][ T21] ? ext4_ext_release+0x10/0x10 [ 64.948380][ T21] ? down_write_killable+0x170/0x170 [ 64.953750][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.959221][ T21] ext4_map_blocks+0x4cb/0x1640 [ 64.964086][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.969299][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.974866][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.980849][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 64.986313][ T21] ext4_writepages+0x1a7b/0x33c0 [ 64.991277][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 64.996908][ T21] ? __lock_acquire+0x2224/0x48b0 [ 65.001950][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.007935][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.014214][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.019854][ T21] ? do_writepages+0xfa/0x2a0 [ 65.024539][ T21] do_writepages+0xfa/0x2a0 [ 65.029066][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 65.034708][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.040254][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.046234][ T21] ? lock_downgrade+0x840/0x840 [ 65.051091][ T21] __writeback_single_inode+0x12a/0x13d0 [ 65.056724][ T21] ? _raw_spin_unlock+0x24/0x40 [ 65.061582][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 65.067656][ T21] writeback_sb_inodes+0x515/0xdc0 [ 65.072873][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 65.078796][ T21] __writeback_inodes_wb+0xc3/0x250 [ 65.084004][ T21] wb_writeback+0x8db/0xd50 [ 65.088519][ T21] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 65.094935][ T21] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 65.100844][ T21] ? cpumask_next+0x3c/0x40 [ 65.105354][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 65.110565][ T21] wb_workfn+0xab3/0x1090 [ 65.115047][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 65.120614][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.126532][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.132622][ T21] process_one_work+0x965/0x1690 [ 65.137587][ T21] ? lock_release+0x800/0x800 [ 65.142303][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.147846][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 65.152811][ T21] worker_thread+0x96/0xe10 [ 65.157366][ T21] ? process_one_work+0x1690/0x1690 [ 65.162570][ T21] kthread+0x3b5/0x4a0 [ 65.166733][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.172463][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.178198][ T21] ret_from_fork+0x1f/0x30 [ 65.188026][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 65.197187][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.203156][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.211397][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.221468][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 65.227449][ T21] Call Trace: [ 65.230742][ T21] dump_stack+0x18f/0x20d [ 65.235091][ T21] check_preemption_disabled+0x20d/0x220 [ 65.240738][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.245880][ T21] ? ext4_find_extent+0x81a/0xad0 [ 65.250933][ T21] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.256408][ T21] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.262178][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.267486][ T21] ? ext4_ext_release+0x10/0x10 [ 65.272363][ T21] ? down_write_killable+0x170/0x170 [ 65.277658][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.283133][ T21] ext4_map_blocks+0x4cb/0x1640 [ 65.288016][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.293324][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.298881][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.304868][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 65.310342][ T21] ext4_writepages+0x1a7b/0x33c0 [ 65.315317][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.320948][ T21] ? __lock_acquire+0x2224/0x48b0 [ 65.326117][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.332112][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.338099][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.343729][ T21] ? do_writepages+0xfa/0x2a0 [ 65.348407][ T21] do_writepages+0xfa/0x2a0 [ 65.352923][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 65.358574][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.364157][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.370141][ T21] ? lock_downgrade+0x840/0x840 [ 65.375001][ T21] __writeback_single_inode+0x12a/0x13d0 [ 65.380641][ T21] ? _raw_spin_unlock+0x24/0x40 [ 65.385585][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 65.391577][ T21] writeback_sb_inodes+0x515/0xdc0 [ 65.396710][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 65.402637][ T21] __writeback_inodes_wb+0xc3/0x250 [ 65.407844][ T21] wb_writeback+0x8db/0xd50 [ 65.412393][ T21] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 65.418727][ T21] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 65.424628][ T21] ? cpumask_next+0x3c/0x40 [ 65.429149][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 65.434531][ T21] wb_workfn+0xab3/0x1090 [ 65.438871][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 65.444443][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.449993][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.455978][ T21] process_one_work+0x965/0x1690 [ 65.460929][ T21] ? lock_release+0x800/0x800 [ 65.465610][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.470992][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 65.475961][ T21] worker_thread+0x96/0xe10 [ 65.480489][ T21] ? process_one_work+0x1690/0x1690 [ 65.485699][ T21] kthread+0x3b5/0x4a0 [ 65.489775][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.495501][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.501228][ T21] ret_from_fork+0x1f/0x30 [ 65.525382][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 65.535098][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.541114][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.549352][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.559429][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 65.565441][ T21] Call Trace: [ 65.568735][ T21] dump_stack+0x18f/0x20d [ 65.573070][ T21] check_preemption_disabled+0x20d/0x220 [ 65.578705][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.583826][ T21] ? ext4_find_extent+0x81a/0xad0 [ 65.588859][ T21] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.594314][ T21] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.600050][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.605365][ T21] ? ext4_ext_release+0x10/0x10 [ 65.610247][ T21] ? down_write_killable+0x170/0x170 [ 65.615543][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.621007][ T21] ext4_map_blocks+0x4cb/0x1640 [ 65.625871][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.631074][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.636623][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.642610][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 65.648074][ T21] ext4_writepages+0x1a7b/0x33c0 [ 65.653038][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.658666][ T21] ? __lock_acquire+0x2224/0x48b0 [ 65.663714][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.669702][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.675692][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.681322][ T21] ? do_writepages+0xfa/0x2a0 [ 65.685996][ T21] do_writepages+0xfa/0x2a0 [ 65.690503][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 65.696141][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.701687][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.707665][ T21] ? lock_downgrade+0x840/0x840 [ 65.712521][ T21] __writeback_single_inode+0x12a/0x13d0 [ 65.719211][ T21] ? _raw_spin_unlock+0x24/0x40 [ 65.724083][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 65.730090][ T21] writeback_sb_inodes+0x515/0xdc0 [ 65.735214][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 65.741135][ T21] __writeback_inodes_wb+0xc3/0x250 [ 65.746443][ T21] wb_writeback+0x8db/0xd50 [ 65.750954][ T21] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 65.757284][ T21] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 65.763305][ T21] ? cpumask_next+0x3c/0x40 [ 65.767823][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 65.773028][ T21] wb_workfn+0xab3/0x1090 [ 65.777366][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 65.782916][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.788479][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.794468][ T21] process_one_work+0x965/0x1690 [ 65.799421][ T21] ? lock_release+0x800/0x800 [ 65.806184][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.811562][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 65.816518][ T21] worker_thread+0x96/0xe10 [ 65.821043][ T21] ? process_one_work+0x1690/0x1690 [ 65.826241][ T21] kthread+0x3b5/0x4a0 [ 65.830316][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.836038][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.841760][ T21] ret_from_fork+0x1f/0x30 [ 65.884833][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 65.894703][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.900758][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.908997][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.919057][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 65.925045][ T21] Call Trace: [ 65.928339][ T21] dump_stack+0x18f/0x20d [ 65.932784][ T21] check_preemption_disabled+0x20d/0x220 [ 65.938437][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.943611][ T21] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.949093][ T21] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 65.955313][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.961149][ T21] ? ext4_ext_release+0x10/0x10 [ 65.966022][ T21] ? down_write_killable+0x170/0x170 [ 65.971310][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.976788][ T21] ext4_map_blocks+0x4cb/0x1640 [ 65.981650][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.986858][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.992404][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.998380][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 66.004459][ T21] ext4_writepages+0x1a7b/0x33c0 [ 66.009422][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 66.015051][ T21] ? __lock_acquire+0x2224/0x48b0 [ 66.020106][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 66.026089][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 66.031734][ T21] ? do_writepages+0xfa/0x2a0 [ 66.036409][ T21] do_writepages+0xfa/0x2a0 [ 66.040921][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 66.046647][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.052195][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.058174][ T21] ? lock_downgrade+0x840/0x840 [ 66.063032][ T21] __writeback_single_inode+0x12a/0x13d0 [ 66.068666][ T21] ? _raw_spin_unlock+0x24/0x40 [ 66.073515][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 66.079504][ T21] writeback_sb_inodes+0x515/0xdc0 [ 66.084629][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 66.090544][ T21] __writeback_inodes_wb+0xc3/0x250 [ 66.095757][ T21] wb_writeback+0x8db/0xd50 [ 66.100278][ T21] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 66.106610][ T21] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 66.112518][ T21] ? cpumask_next+0x3c/0x40 [ 66.117030][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 66.122249][ T21] wb_workfn+0xab3/0x1090 [ 66.126592][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 66.132147][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.137785][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.144825][ T21] process_one_work+0x965/0x1690 [ 66.149780][ T21] ? lock_release+0x800/0x800 [ 66.154461][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.159843][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 66.164892][ T21] worker_thread+0x96/0xe10 [ 66.169411][ T21] ? process_one_work+0x1690/0x1690 [ 66.174612][ T21] kthread+0x3b5/0x4a0 [ 66.178684][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 executing program [ 66.184401][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.190270][ T21] ret_from_fork+0x1f/0x30 [ 66.231205][ T21] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:1/21 [ 66.240997][ T21] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.246901][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.255149][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.265211][ T21] Workqueue: writeback wb_workfn (flush-8:0) [ 66.271204][ T21] Call Trace: [ 66.274503][ T21] dump_stack+0x18f/0x20d [ 66.278842][ T21] check_preemption_disabled+0x20d/0x220 [ 66.284478][ T21] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.289606][ T21] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.295185][ T21] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 66.301347][ T21] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.306646][ T21] ? ext4_ext_release+0x10/0x10 [ 66.311800][ T21] ? down_write_killable+0x170/0x170 [ 66.317090][ T21] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.322574][ T21] ext4_map_blocks+0x4cb/0x1640 [ 66.327444][ T21] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.332674][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.338307][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.344295][ T21] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 66.349761][ T21] ext4_writepages+0x1a7b/0x33c0 [ 66.354738][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 66.360393][ T21] ? __lock_acquire+0x2224/0x48b0 [ 66.365445][ T21] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 66.371430][ T21] ? __ext4_mark_inode_dirty+0x940/0x940 [ 66.377071][ T21] ? do_writepages+0xfa/0x2a0 [ 66.381744][ T21] do_writepages+0xfa/0x2a0 [ 66.386255][ T21] ? page_writeback_cpu_online+0x10/0x10 [ 66.391898][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.397443][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.403420][ T21] ? lock_downgrade+0x840/0x840 [ 66.408275][ T21] __writeback_single_inode+0x12a/0x13d0 [ 66.413909][ T21] ? _raw_spin_unlock+0x24/0x40 [ 66.418762][ T21] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 66.424748][ T21] writeback_sb_inodes+0x515/0xdc0 [ 66.429876][ T21] ? __writeback_single_inode+0x13d0/0x13d0 [ 66.435800][ T21] __writeback_inodes_wb+0xc3/0x250 [ 66.441013][ T21] wb_writeback+0x8db/0xd50 [ 66.445528][ T21] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 66.451862][ T21] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 66.457761][ T21] ? cpumask_next+0x3c/0x40 [ 66.462353][ T21] ? get_nr_dirty_inodes+0xd6/0x130 [ 66.467557][ T21] wb_workfn+0xab3/0x1090 [ 66.471901][ T21] ? inode_wait_for_writeback+0x30/0x30 [ 66.477451][ T21] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.482997][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.489162][ T21] process_one_work+0x965/0x1690 [ 66.494109][ T21] ? lock_release+0x800/0x800 [ 66.498787][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.504168][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 66.509116][ T21] worker_thread+0x96/0xe10 [ 66.513632][ T21] ? process_one_work+0x1690/0x1690 [ 66.518831][ T21] kthread+0x3b5/0x4a0 [ 66.522896][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.528609][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.534328][ T21] ret_from_fork+0x1f/0x30 [ 66.679094][ T7] tipc: TX() has been purged, node left! [ 67.190960][ T7] ================================================================== [ 67.199164][ T7] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 67.207129][ T7] Write of size 1 at addr ffff8880a8e689e4 by task kworker/u4:0/7 [ 67.214905][ T7] [ 67.217233][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc1-syzkaller #0 [ 67.225380][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.235496][ T7] Workqueue: netns cleanup_net [ 67.240263][ T7] Call Trace: [ 67.243561][ T7] dump_stack+0x18f/0x20d [ 67.247946][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.253487][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.259137][ T7] ? afs_put_call+0xa40/0xa40 [ 67.263847][ T7] print_address_description.constprop.0.cold+0xd3/0x413 [ 67.270885][ T7] ? vprintk_func+0x97/0x1a6 [ 67.275544][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.281095][ T7] kasan_report.cold+0x1f/0x37 [ 67.285840][ T7] ? rcu_read_lock_held_common+0x51/0xa0 [ 67.291452][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.296978][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 67.302328][ T7] ? afs_close_socket+0x320/0x320 [ 67.307330][ T7] ? afs_put_call+0xa40/0xa40 [ 67.311997][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 67.317350][ T7] ? afs_put_call+0xa40/0xa40 [ 67.322019][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 67.328414][ T7] rxrpc_call_completed+0xca/0xf0 [ 67.333629][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 67.338983][ T7] ? lock_sock_nested+0x94/0x110 [ 67.343902][ T7] rxrpc_listen+0x147/0x360 [ 67.348385][ T7] afs_close_socket+0x95/0x320 [ 67.353125][ T7] ? afs_purge_servers+0x16d/0x300 [ 67.358217][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 67.363675][ T7] ? init_wait_var_entry+0x200/0x200 [ 67.368958][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.374582][ T7] ? check_preemption_disabled+0x38/0x220 [ 67.380297][ T7] afs_net_exit+0x1bc/0x310 [ 67.384779][ T7] ? afs_net_init+0xe30/0xe30 [ 67.389447][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 67.394553][ T7] cleanup_net+0x511/0xa50 [ 67.398968][ T7] ? unregister_pernet_device+0x70/0x70 [ 67.404515][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.410494][ T7] process_one_work+0x965/0x1690 [ 67.415431][ T7] ? lock_release+0x800/0x800 [ 67.420105][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.425472][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 67.430418][ T7] worker_thread+0x96/0xe10 [ 67.434917][ T7] ? process_one_work+0x1690/0x1690 [ 67.440184][ T7] kthread+0x3b5/0x4a0 [ 67.444244][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.449940][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.455651][ T7] ret_from_fork+0x1f/0x30 [ 67.460067][ T7] [ 67.462723][ T7] Allocated by task 6841: [ 67.467064][ T7] save_stack+0x1b/0x40 [ 67.471215][ T7] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 67.476828][ T7] kmem_cache_alloc_trace+0x153/0x7d0 [ 67.482191][ T7] afs_alloc_call+0x55/0x630 [ 67.486805][ T7] afs_charge_preallocation+0xe9/0x2d0 [ 67.492268][ T7] afs_open_socket+0x292/0x360 [ 67.497041][ T7] afs_net_init+0xa6c/0xe30 [ 67.501561][ T7] ops_init+0xaf/0x420 [ 67.505784][ T7] setup_net+0x2de/0x860 [ 67.510007][ T7] copy_net_ns+0x293/0x590 [ 67.515099][ T7] create_new_namespaces+0x3fb/0xb30 [ 67.520453][ T7] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 67.526168][ T7] ksys_unshare+0x43d/0x8e0 [ 67.530666][ T7] __x64_sys_unshare+0x2d/0x40 [ 67.535753][ T7] do_syscall_64+0x60/0xe0 [ 67.540162][ T7] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.546044][ T7] [ 67.548454][ T7] Freed by task 7: [ 67.552249][ T7] save_stack+0x1b/0x40 [ 67.556393][ T7] __kasan_slab_free+0xf7/0x140 [ 67.561224][ T7] kfree+0x109/0x2b0 [ 67.565099][ T7] afs_put_call+0x585/0xa40 [ 67.569732][ T7] rxrpc_discard_prealloc+0x764/0xab0 [ 67.575525][ T7] rxrpc_listen+0x147/0x360 [ 67.580340][ T7] afs_close_socket+0x95/0x320 [ 67.585102][ T7] afs_net_exit+0x1bc/0x310 [ 67.589604][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 67.594827][ T7] cleanup_net+0x511/0xa50 [ 67.599257][ T7] process_one_work+0x965/0x1690 [ 67.604185][ T7] worker_thread+0x96/0xe10 [ 67.608682][ T7] kthread+0x3b5/0x4a0 [ 67.612752][ T7] ret_from_fork+0x1f/0x30 [ 67.617138][ T7] [ 67.619448][ T7] The buggy address belongs to the object at ffff8880a8e68800 [ 67.619448][ T7] which belongs to the cache kmalloc-1k of size 1024 [ 67.633477][ T7] The buggy address is located 484 bytes inside of [ 67.633477][ T7] 1024-byte region [ffff8880a8e68800, ffff8880a8e68c00) [ 67.646821][ T7] The buggy address belongs to the page: [ 67.652435][ T7] page:ffffea0002a39a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880a8e68000 [ 67.662820][ T7] flags: 0xfffe0000000200(slab) [ 67.667651][ T7] raw: 00fffe0000000200 ffffea0002618588 ffffea00028ed708 ffff8880aa000c40 [ 67.677022][ T7] raw: ffff8880a8e68000 ffff8880a8e68000 0000000100000001 0000000000000000 [ 67.685673][ T7] page dumped because: kasan: bad access detected [ 67.692078][ T7] [ 67.694383][ T7] Memory state around the buggy address: [ 67.700104][ T7] ffff8880a8e68880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.708174][ T7] ffff8880a8e68900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.716344][ T7] >ffff8880a8e68980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.724417][ T7] ^ [ 67.731617][ T7] ffff8880a8e68a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.741068][ T7] ffff8880a8e68a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.749111][ T7] ================================================================== [ 67.757511][ T7] Disabling lock debugging due to kernel taint [ 67.763748][ T7] Kernel panic - not syncing: panic_on_warn set ... [ 67.770339][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 67.779871][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.789930][ T7] Workqueue: netns cleanup_net [ 67.794687][ T7] Call Trace: [ 67.798406][ T7] dump_stack+0x18f/0x20d [ 67.802731][ T7] ? afs_wake_up_async_call+0x670/0x770 [ 67.808250][ T7] ? afs_put_call+0xa40/0xa40 [ 67.812960][ T7] panic+0x2e3/0x75c [ 67.816832][ T7] ? __warn_printk+0xf3/0xf3 [ 67.821487][ T7] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 67.827856][ T7] ? trace_hardirqs_on+0x55/0x220 [ 67.832870][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.838580][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.844114][ T7] ? afs_put_call+0xa40/0xa40 [ 67.848789][ T7] end_report+0x4d/0x53 [ 67.852980][ T7] kasan_report.cold+0xd/0x37 [ 67.857679][ T7] ? rcu_read_lock_held_common+0x51/0xa0 [ 67.863296][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.869063][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 67.874410][ T7] ? afs_close_socket+0x320/0x320 [ 67.879423][ T7] ? afs_put_call+0xa40/0xa40 [ 67.884077][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 67.889175][ T7] ? afs_put_call+0xa40/0xa40 [ 67.893838][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 67.900242][ T7] rxrpc_call_completed+0xca/0xf0 [ 67.905255][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 67.910602][ T7] ? lock_sock_nested+0x94/0x110 [ 67.915529][ T7] rxrpc_listen+0x147/0x360 [ 67.920628][ T7] afs_close_socket+0x95/0x320 [ 67.925376][ T7] ? afs_purge_servers+0x16d/0x300 [ 67.930460][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 67.935920][ T7] ? init_wait_var_entry+0x200/0x200 [ 67.941181][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.946791][ T7] ? check_preemption_disabled+0x38/0x220 [ 67.952482][ T7] afs_net_exit+0x1bc/0x310 [ 67.956964][ T7] ? afs_net_init+0xe30/0xe30 [ 67.961625][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 67.966709][ T7] cleanup_net+0x511/0xa50 [ 67.971101][ T7] ? unregister_pernet_device+0x70/0x70 [ 67.976624][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.982589][ T7] process_one_work+0x965/0x1690 [ 67.987722][ T7] ? lock_release+0x800/0x800 [ 67.993861][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.999214][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 68.004139][ T7] worker_thread+0x96/0xe10 [ 68.008654][ T7] ? process_one_work+0x1690/0x1690 [ 68.013845][ T7] kthread+0x3b5/0x4a0 [ 68.017901][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.023616][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.029310][ T7] ret_from_fork+0x1f/0x30 [ 68.035118][ T7] Kernel Offset: disabled [ 68.039431][ T7] Rebooting in 86400 seconds..