[ OK ] Started Regular background program processing daemon. Starting OpenBSD Secure Shell server... Starting Permit User Sessions... Starting getty on tty2-tty6 if dbus and logind are not available... Starting System Logging Service... [ OK ] Found device /dev/ttyS0. [ OK ] Started Permit User Sessions. [ OK ] Started System Logging Service. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ 60.002463][ T26] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/26 [ 60.011520][ T26] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.017958][ T26] CPU: 0 PID: 26 Comm: kworker/u4:2 Not tainted 5.7.0-syzkaller #0 [ 60.025862][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.035959][ T26] Workqueue: writeback wb_workfn (flush-8:0) [ 60.041938][ T26] Call Trace: [ 60.045231][ T26] dump_stack+0x18f/0x20d [ 60.049569][ T26] check_preemption_disabled+0x20d/0x220 [ 60.055203][ T26] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.060316][ T26] ? ext4_find_extent+0x81a/0xad0 [ 60.065438][ T26] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.070901][ T26] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.076892][ T26] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.082191][ T26] ? ext4_ext_release+0x10/0x10 [ 60.087064][ T26] ? down_write_killable+0x170/0x170 [ 60.092344][ T26] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.097811][ T26] ext4_map_blocks+0x4cb/0x1640 [ 60.102673][ T26] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.107879][ T26] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.113422][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.119401][ T26] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 60.124866][ T26] ext4_writepages+0x1a7b/0x33c0 [ 60.129827][ T26] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.135457][ T26] ? __lock_acquire+0x2224/0x48b0 [ 60.140500][ T26] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.146491][ T26] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.152476][ T26] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.158110][ T26] ? do_writepages+0xfa/0x2a0 [ 60.162875][ T26] do_writepages+0xfa/0x2a0 [ 60.167387][ T26] ? page_writeback_cpu_online+0x10/0x10 [ 60.173289][ T26] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.178836][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.184817][ T26] ? lock_downgrade+0x840/0x840 [ 60.189676][ T26] __writeback_single_inode+0x12a/0x13d0 [ 60.195310][ T26] ? _raw_spin_unlock+0x24/0x40 [ 60.200158][ T26] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 60.206141][ T26] writeback_sb_inodes+0x515/0xdc0 [ 60.211266][ T26] ? __writeback_single_inode+0x13d0/0x13d0 [ 60.217184][ T26] __writeback_inodes_wb+0xc3/0x250 [ 60.222395][ T26] wb_writeback+0x8db/0xd50 [ 60.226910][ T26] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 60.233242][ T26] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 60.239139][ T26] ? cpumask_next+0x3c/0x40 [ 60.243640][ T26] ? get_nr_dirty_inodes+0xd6/0x130 [ 60.248843][ T26] wb_workfn+0xab3/0x1090 [ 60.253265][ T26] ? inode_wait_for_writeback+0x30/0x30 [ 60.258818][ T26] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.264370][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.270362][ T26] process_one_work+0x965/0x1690 [ 60.275310][ T26] ? lock_release+0x800/0x800 [ 60.279985][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 60.285368][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 60.290321][ T26] worker_thread+0x96/0xe10 [ 60.294844][ T26] ? process_one_work+0x1690/0x1690 [ 60.300129][ T26] kthread+0x3b5/0x4a0 [ 60.304196][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.309914][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.315675][ T26] ret_from_fork+0x1f/0x30 [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ 61.785193][ T6737] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6737 [ 61.794725][ T6737] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.800630][ T6737] CPU: 0 PID: 6737 Comm: systemd-rfkill Not tainted 5.7.0-syzkaller #0 [ 61.808881][ T6737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.818936][ T6737] Call Trace: [ 61.822233][ T6737] dump_stack+0x18f/0x20d [ 61.826573][ T6737] check_preemption_disabled+0x20d/0x220 [ 61.832212][ T6737] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.837657][ T6737] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.837681][ T6737] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 61.848836][ T6737] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.854250][ T6737] ? ext4_ext_release+0x10/0x10 [ 61.859111][ T6737] ? down_write_killable+0x170/0x170 [ 61.864527][ T6737] ? ext4_es_lookup_extent+0x41d/0xd10 [[ 61.870024][ T6737] ext4_map_blocks+0x4cb/0x1640 [ 61.874946][ T6737] ? ext4_issue_zeroout+0x1e0/0x1e0  OK [0[ 61.880158][ T6737] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.887087][ T6737] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.893069][ T6737] ? prandom_u32_state+0xe/0x170 m] [ 61.898006][ T6737] ? __brelse+0x84/0xa0 [ 61.902398][ T6737] ? __ext4_new_inode+0x144/0x55e0 [ 61.907508][ T6737] ext4_getblk+0xad/0x520 Started Update U[ 61.911835][ T6737] ? ext4_iomap_overwrite_begin+0xa0/0xa0 TMP about System[ 61.918926][ T6737] ? ext4_free_inode+0x1700/0x1700 [ 61.925431][ T6737] ext4_bread+0x7c/0x380 Runlevel Change[ 61.929730][ T6737] ? ext4_getblk+0x520/0x520 [ 61.935715][ T6737] ? dquot_get_next_dqblk+0x180/0x180 s. [ 61.941106][ T6737] ext4_append+0x153/0x360 [ 61.945865][ T6737] ext4_mkdir+0x5e0/0xdf0 [ 61.950220][ T6737] ? ext4_rmdir+0xde0/0xde0 [ 61.954733][ T6737] vfs_mkdir+0x419/0x690 [ 61.958981][ T6737] do_mkdirat+0x21e/0x280 [ 61.963319][ T6737] ? __ia32_sys_mknod+0xb0/0xb0 [ 61.968170][ T6737] ? do_syscall_64+0x1c/0xe0 [ 61.973735][ T6737] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.979693][ T6737] do_syscall_64+0x60/0xe0 [ 61.984105][ T6737] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.989980][ T6737] RIP: 0033:0x7f9fc20cc687 [ 61.994383][ T6737] Code: Bad RIP value. [ 61.998423][ T6737] RSP: 002b:00007ffc21c6edd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 62.006806][ T6737] RAX: ffffffffffffffda RBX: 000056520a7b7985 RCX: 00007f9fc20cc687 [ 62.014754][ T6737] RDX: 00007ffc21c6eca0 RSI: 00000000000001ed RDI: 000056520a7b7985 [ 62.022704][ T6737] RBP: 00007f9fc20cc680 R08: 0000000000000100 R09: 0000000000000000 [ 62.030752][ T6737] R10: 000056520a7b7980 R11: 0000000000000246 R12: 00000000000001ed [ 62.038698][ T6737] R13: 00007ffc21c6ef60 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.63' (ECDSA) to the list of known hosts. 2020/06/13 20:27:16 fuzzer started 2020/06/13 20:27:16 connecting to host at 10.128.0.26:38537 2020/06/13 20:27:16 checking machine... 2020/06/13 20:27:16 checking revisions... 2020/06/13 20:27:16 testing simple program... syzkaller login: [ 65.222682][ T6814] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6814 [ 65.231937][ T6814] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.237822][ T6814] CPU: 1 PID: 6814 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 65.245689][ T6814] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.255804][ T6814] Call Trace: [ 65.259077][ T6814] dump_stack+0x18f/0x20d [ 65.263391][ T6814] check_preemption_disabled+0x20d/0x220 [ 65.269010][ T6814] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.274106][ T6814] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.279539][ T6814] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.285238][ T6814] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.290516][ T6814] ? ext4_ext_release+0x10/0x10 [ 65.295381][ T6814] ? down_write_killable+0x170/0x170 [ 65.300641][ T6814] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.306095][ T6814] ext4_map_blocks+0x4cb/0x1640 [ 65.310935][ T6814] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.316163][ T6814] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.321738][ T6814] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.327694][ T6814] ? prandom_u32_state+0xe/0x170 [ 65.333600][ T6814] ? __brelse+0x84/0xa0 [ 65.337819][ T6814] ? __ext4_new_inode+0x144/0x55e0 [ 65.342922][ T6814] ext4_getblk+0xad/0x520 [ 65.347229][ T6814] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.353013][ T6814] ? ext4_free_inode+0x1700/0x1700 [ 65.358117][ T6814] ext4_bread+0x7c/0x380 [ 65.362347][ T6814] ? ext4_getblk+0x520/0x520 [ 65.366912][ T6814] ? dquot_get_next_dqblk+0x180/0x180 [ 65.372369][ T6814] ext4_append+0x153/0x360 [ 65.376766][ T6814] ext4_mkdir+0x5e0/0xdf0 [ 65.381091][ T6814] ? ext4_rmdir+0xde0/0xde0 [ 65.385578][ T6814] vfs_mkdir+0x419/0x690 [ 65.389812][ T6814] do_mkdirat+0x21e/0x280 [ 65.394122][ T6814] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.398948][ T6814] ? do_syscall_64+0x1c/0xe0 [ 65.403532][ T6814] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.409550][ T6814] do_syscall_64+0x60/0xe0 [ 65.413953][ T6814] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.419822][ T6814] RIP: 0033:0x4b02a0 [ 65.423699][ T6814] Code: Bad RIP value. [ 65.427738][ T6814] RSP: 002b:000000c0000db4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 65.436133][ T6814] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 65.444089][ T6814] RDX: 00000000000001c0 RSI: 000000c000026cc0 RDI: ffffffffffffff9c [ 65.452034][ T6814] RBP: 000000c0000db510 R08: 0000000000000000 R09: 0000000000000000 [ 65.459979][ T6814] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 65.469233][ T6814] R13: 0000000000000067 R14: 0000000000000066 R15: 0000000000000100 [ 65.481934][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 65.486785][ T6826] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6826 [ 65.494288][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.503742][ T6826] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.503758][ T6826] CPU: 1 PID: 6826 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 65.503766][ T6826] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.503770][ T6826] Call Trace: [ 65.503788][ T6826] dump_stack+0x18f/0x20d [ 65.503807][ T6826] check_preemption_disabled+0x20d/0x220 [ 65.546929][ T6826] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.552030][ T6826] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.557469][ T6826] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.563174][ T6826] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.568447][ T6826] ? ext4_ext_release+0x10/0x10 [ 65.573292][ T6826] ? down_write_killable+0x170/0x170 [ 65.578615][ T6826] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.584066][ T6826] ext4_map_blocks+0x4cb/0x1640 [ 65.588927][ T6826] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.594113][ T6826] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.599643][ T6826] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.605617][ T6826] ? prandom_u32_state+0xe/0x170 [ 65.610538][ T6826] ? __brelse+0x84/0xa0 [ 65.614680][ T6826] ? __ext4_new_inode+0x144/0x55e0 [ 65.619796][ T6826] ext4_getblk+0xad/0x520 [ 65.624112][ T6826] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.629816][ T6826] ? ext4_free_inode+0x1700/0x1700 [ 65.634925][ T6826] ext4_bread+0x7c/0x380 [ 65.639150][ T6826] ? ext4_getblk+0x520/0x520 [ 65.643734][ T6826] ? dquot_get_next_dqblk+0x180/0x180 [ 65.649105][ T6826] ? security_transition_sid+0x123/0x190 [ 65.654730][ T6826] ? security_transition_sid+0xed/0x190 [ 65.660257][ T6826] ext4_append+0x153/0x360 [ 65.664658][ T6826] ext4_mkdir+0x5e0/0xdf0 [ 65.668974][ T6826] ? ext4_rmdir+0xde0/0xde0 [ 65.673468][ T6826] vfs_mkdir+0x419/0x690 [ 65.677780][ T6826] do_mkdirat+0x21e/0x280 [ 65.682100][ T6826] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.687019][ T6826] ? do_syscall_64+0x1c/0xe0 [ 65.691591][ T6826] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.697552][ T6826] do_syscall_64+0x60/0xe0 [ 65.702125][ T6826] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.707996][ T6826] RIP: 0033:0x45bee7 [ 65.711866][ T6826] Code: Bad RIP value. [ 65.715911][ T6826] RSP: 002b:00007ffee4793088 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 65.724298][ T6826] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 65.732251][ T6826] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffee4793260 [ 65.740201][ T6826] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003b00 [ 65.748172][ T6826] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 65.756130][ T6826] R13: 00007ffee4793260 R14: 8421084210842109 R15: 00007ffee479326c [ 65.764106][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 65.771908][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.781972][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 65.787949][ T7] Call Trace: [ 65.791242][ T7] dump_stack+0x18f/0x20d [ 65.795600][ T7] check_preemption_disabled+0x20d/0x220 [ 65.801242][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.806361][ T7] ? ext4_find_extent+0x81a/0xad0 [ 65.811487][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.816954][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.822692][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.828016][ T7] ? ext4_ext_release+0x10/0x10 [ 65.832888][ T7] ? down_write_killable+0x170/0x170 [ 65.838172][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.843642][ T7] ext4_map_blocks+0x4cb/0x1640 [ 65.848517][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.853732][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.859280][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.865259][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 65.870815][ T7] ext4_writepages+0x1a7b/0x33c0 [ 65.875783][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.881441][ T7] ? __lock_acquire+0x2224/0x48b0 [ 65.886486][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.892479][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.898484][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.900615][ T29] audit: type=1400 audit(1592080036.882:8): avc: denied { execmem } for pid=6826 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 65.904124][ T7] ? do_writepages+0xfa/0x2a0 [ 65.927841][ T6827] IPVS: ftp: loaded support on port[0] = 21 [ 65.929594][ T7] do_writepages+0xfa/0x2a0 [ 65.939961][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 65.945608][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.951161][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.957144][ T7] ? lock_downgrade+0x840/0x840 [ 65.962005][ T7] __writeback_single_inode+0x12a/0x13d0 [ 65.967729][ T7] ? _raw_spin_unlock+0x24/0x40 [ 65.972877][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 65.978865][ T7] writeback_sb_inodes+0x515/0xdc0 [ 65.982622][ T6827] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6827 [ 65.983994][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 65.993389][ T6827] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.999251][ T7] __writeback_inodes_wb+0xc3/0x250 [ 66.010380][ T7] wb_writeback+0x8db/0xd50 [ 66.014886][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 66.021204][ T7] ? cpumask_next+0x3c/0x40 [ 66.025689][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 66.030886][ T7] wb_workfn+0x9bc/0x1090 [ 66.035202][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 66.040732][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.046608][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.052577][ T7] process_one_work+0x965/0x1690 [ 66.057516][ T7] ? lock_release+0x800/0x800 [ 66.062189][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.067544][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 66.072468][ T7] worker_thread+0x96/0xe10 [ 66.077045][ T7] ? process_one_work+0x1690/0x1690 [ 66.082224][ T7] kthread+0x3b5/0x4a0 [ 66.086278][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.091979][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.097681][ T7] ret_from_fork+0x1f/0x30 [ 66.102092][ T6827] CPU: 1 PID: 6827 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 66.110435][ T6827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.120489][ T6827] Call Trace: [ 66.123785][ T6827] dump_stack+0x18f/0x20d [ 66.123936][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 66.128128][ T6827] check_preemption_disabled+0x20d/0x220 [ 66.128147][ T6827] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.137162][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.142721][ T6827] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.142735][ T6827] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.142758][ T6827] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.142782][ T6827] ? ext4_ext_release+0x10/0x10 [ 66.142813][ T6827] ? down_write_killable+0x170/0x170 [ 66.180200][ T6827] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.185643][ T6827] ext4_map_blocks+0x4cb/0x1640 [ 66.191365][ T6827] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.196543][ T6827] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.202506][ T6827] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.208465][ T6827] ? prandom_u32_state+0xe/0x170 [ 66.213393][ T6827] ? __brelse+0x84/0xa0 [ 66.217531][ T6827] ? __ext4_new_inode+0x144/0x55e0 [ 66.222625][ T6827] ext4_getblk+0xad/0x520 [ 66.226935][ T6827] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.232637][ T6827] ? ext4_free_inode+0x1700/0x1700 [ 66.237746][ T6827] ext4_bread+0x7c/0x380 [ 66.241967][ T6827] ? ext4_getblk+0x520/0x520 [ 66.246548][ T6827] ? dquot_get_next_dqblk+0x180/0x180 [ 66.251902][ T6827] ? security_transition_sid+0x123/0x190 [ 66.257513][ T6827] ? security_transition_sid+0xed/0x190 [ 66.264345][ T6827] ext4_append+0x153/0x360 [ 66.268762][ T6827] ext4_mkdir+0x5e0/0xdf0 [ 66.273090][ T6827] ? ext4_rmdir+0xde0/0xde0 [ 66.277581][ T6827] vfs_mkdir+0x419/0x690 [ 66.281809][ T6827] do_mkdirat+0x21e/0x280 [ 66.286120][ T6827] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.290954][ T6827] ? do_syscall_64+0x1c/0xe0 [ 66.295525][ T6827] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.301484][ T6827] do_syscall_64+0x60/0xe0 [ 66.305881][ T6827] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.311752][ T6827] RIP: 0033:0x45bee7 [ 66.315640][ T6827] Code: Bad RIP value. [ 66.319683][ T6827] RSP: 002b:00007ffee4792f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 66.328177][ T6827] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 66.336127][ T6827] RDX: 00007ffee4792fc3 RSI: 00000000000001ff RDI: 00007ffee4792fc0 [ 66.344077][ T6827] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 66.352028][ T6827] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185d0 [ 66.359976][ T6827] R13: 00007ffee4792fb0 R14: 0000000000000000 R15: 00007ffee4792fc0 [ 66.367954][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 66.375770][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.385831][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 66.391809][ T7] Call Trace: [ 66.395108][ T7] dump_stack+0x18f/0x20d [ 66.399446][ T7] check_preemption_disabled+0x20d/0x220 [ 66.405189][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.410306][ T7] ? ext4_find_extent+0x81a/0xad0 [ 66.415385][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.420844][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.426586][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.430753][ T6827] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6827 [ 66.431883][ T7] ? ext4_ext_release+0x10/0x10 [ 66.441289][ T6827] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.446062][ T7] ? down_write_killable+0x170/0x170 [ 66.457181][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.462640][ T7] ext4_map_blocks+0x4cb/0x1640 [ 66.467503][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.472689][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.478216][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.484197][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 66.489661][ T7] ext4_writepages+0x1a7b/0x33c0 [ 66.494611][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 66.500229][ T7] ? __lock_acquire+0x2224/0x48b0 [ 66.505265][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 66.511238][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 66.517213][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 66.522835][ T7] ? do_writepages+0xfa/0x2a0 [ 66.527493][ T7] do_writepages+0xfa/0x2a0 [ 66.531997][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 66.537635][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.543193][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.549180][ T7] ? lock_downgrade+0x840/0x840 [ 66.554024][ T7] __writeback_single_inode+0x12a/0x13d0 [ 66.559642][ T7] ? _raw_spin_unlock+0x24/0x40 [ 66.564475][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 66.570438][ T7] writeback_sb_inodes+0x515/0xdc0 [ 66.575548][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 66.581452][ T7] __writeback_inodes_wb+0xc3/0x250 [ 66.586662][ T7] wb_writeback+0x8db/0xd50 [ 66.591157][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 66.597489][ T7] ? cpumask_next+0x3c/0x40 [ 66.601989][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 66.607173][ T7] wb_workfn+0x9bc/0x1090 [ 66.611503][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 66.617133][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.623790][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.629754][ T7] process_one_work+0x965/0x1690 [ 66.634684][ T7] ? lock_release+0x800/0x800 [ 66.639342][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.644697][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 66.649624][ T7] worker_thread+0x96/0xe10 [ 66.654131][ T7] ? process_one_work+0x1690/0x1690 [ 66.659309][ T7] kthread+0x3b5/0x4a0 [ 66.663363][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.669060][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.674765][ T7] ret_from_fork+0x1f/0x30 [ 66.679181][ T6827] CPU: 1 PID: 6827 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 66.687449][ T6827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.697503][ T6827] Call Trace: [ 66.700802][ T6827] dump_stack+0x18f/0x20d [ 66.705145][ T6827] check_preemption_disabled+0x20d/0x220 [ 66.710795][ T6827] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.715921][ T6827] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.721383][ T6827] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.727117][ T6827] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.732503][ T6827] ? ext4_ext_release+0x10/0x10 [ 66.737385][ T6827] ? down_write_killable+0x170/0x170 [ 66.742679][ T6827] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.742888][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 66.748139][ T6827] ext4_map_blocks+0x4cb/0x1640 [ 66.757291][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.762073][ T6827] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.762089][ T6827] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.762105][ T6827] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.762117][ T6827] ? prandom_u32_state+0xe/0x170 [ 66.762135][ T6827] ? __brelse+0x84/0xa0 [ 66.793944][ T6827] ? __ext4_new_inode+0x144/0x55e0 [ 66.799054][ T6827] ext4_getblk+0xad/0x520 [ 66.803372][ T6827] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.809076][ T6827] ? ext4_free_inode+0x1700/0x1700 [ 66.814181][ T6827] ext4_bread+0x7c/0x380 [ 66.818418][ T6827] ? ext4_getblk+0x520/0x520 [ 66.822988][ T6827] ? dquot_get_next_dqblk+0x180/0x180 [ 66.828342][ T6827] ? security_transition_sid+0x123/0x190 [ 66.833960][ T6827] ? security_transition_sid+0xed/0x190 [ 66.839575][ T6827] ext4_append+0x153/0x360 [ 66.843977][ T6827] ext4_mkdir+0x5e0/0xdf0 [ 66.848348][ T6827] ? ext4_rmdir+0xde0/0xde0 [ 66.852947][ T6827] vfs_mkdir+0x419/0x690 [ 66.857185][ T6827] do_mkdirat+0x21e/0x280 [ 66.861499][ T6827] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.866344][ T6827] ? do_syscall_64+0x1c/0xe0 [ 66.870941][ T6827] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.876908][ T6827] do_syscall_64+0x60/0xe0 [ 66.881312][ T6827] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.887196][ T6827] RIP: 0033:0x45bee7 [ 66.891067][ T6827] Code: Bad RIP value. [ 66.895111][ T6827] RSP: 002b:00007ffee4792f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 66.903518][ T6827] RAX: ffffffffffffffda RBX: 000000000001036c RCX: 000000000045bee7 [ 66.911471][ T6827] RDX: 00007ffee4792fc3 RSI: 00000000000001ff RDI: 00007ffee4792fc0 [ 66.919893][ T6827] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 66.927842][ T6827] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 66.935794][ T6827] R13: 00007ffee4792fb0 R14: 000000000001035f R15: 00007ffee4792fc0 [ 66.943819][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 66.951630][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.961781][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 66.967757][ T7] Call Trace: [ 66.971051][ T7] dump_stack+0x18f/0x20d [ 66.975393][ T7] check_preemption_disabled+0x20d/0x220 [ 66.981031][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.986925][ T7] ? ext4_find_extent+0x81a/0xad0 [ 66.991978][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.997525][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 67.003257][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 67.008561][ T7] ? ext4_ext_release+0x10/0x10 [ 67.013432][ T7] ? down_write_killable+0x170/0x170 [ 67.018768][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 67.024235][ T7] ext4_map_blocks+0x4cb/0x1640 [ 67.029089][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 67.034301][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.039854][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.045843][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 67.051309][ T7] ext4_writepages+0x1a7b/0x33c0 [ 67.056275][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 67.061906][ T7] ? __lock_acquire+0x2224/0x48b0 [ 67.066961][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 67.072962][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 67.078944][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 67.084578][ T7] ? do_writepages+0xfa/0x2a0 [ 67.089257][ T7] do_writepages+0xfa/0x2a0 [ 67.093775][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 67.099419][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.104972][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.110958][ T7] ? lock_downgrade+0x840/0x840 [ 67.115853][ T7] __writeback_single_inode+0x12a/0x13d0 [ 67.121493][ T7] ? _raw_spin_unlock+0x24/0x40 2020/06/13 20:27:18 building call list... [ 67.126347][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 67.132335][ T7] writeback_sb_inodes+0x515/0xdc0 [ 67.137475][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 67.143403][ T7] __writeback_inodes_wb+0xc3/0x250 [ 67.148624][ T7] wb_writeback+0x8db/0xd50 [ 67.153146][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 67.159488][ T7] ? cpumask_next+0x3c/0x40 [ 67.164000][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 67.169220][ T7] wb_workfn+0x9bc/0x1090 [ 67.173567][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 67.179122][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.184671][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.190661][ T7] process_one_work+0x965/0x1690 [ 67.195616][ T7] ? lock_release+0x800/0x800 [ 67.200323][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.205695][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 67.210644][ T7] worker_thread+0x96/0xe10 [ 67.215163][ T7] ? process_one_work+0x1690/0x1690 [ 67.220361][ T7] kthread+0x3b5/0x4a0 [ 67.224449][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.230182][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.235995][ T7] ret_from_fork+0x1f/0x30 [ 67.273892][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 67.283122][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 67.289028][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 67.296830][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.306934][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 67.312918][ T7] Call Trace: [ 67.316213][ T7] dump_stack+0x18f/0x20d [ 67.320545][ T7] check_preemption_disabled+0x20d/0x220 [ 67.326190][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 67.331315][ T7] ? ext4_find_extent+0x81a/0xad0 [ 67.336364][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 67.341835][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 67.347566][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 67.352864][ T7] ? ext4_ext_release+0x10/0x10 [ 67.357739][ T7] ? down_write_killable+0x170/0x170 [ 67.363027][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 67.368585][ T7] ext4_map_blocks+0x4cb/0x1640 [ 67.373445][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 67.378651][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.384197][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.390185][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 67.395733][ T7] ext4_writepages+0x1a7b/0x33c0 [ 67.400692][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 67.406338][ T7] ? __lock_acquire+0x2224/0x48b0 [ 67.411730][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 67.417714][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 67.423695][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 67.429323][ T7] ? do_writepages+0xfa/0x2a0 [ 67.433997][ T7] do_writepages+0xfa/0x2a0 [ 67.438520][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 67.444163][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.449713][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.455698][ T7] ? lock_downgrade+0x840/0x840 [ 67.460563][ T7] __writeback_single_inode+0x12a/0x13d0 [ 67.466229][ T7] ? _raw_spin_unlock+0x24/0x40 [ 67.471076][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 67.477056][ T7] writeback_sb_inodes+0x515/0xdc0 [ 67.482176][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 67.488096][ T7] __writeback_inodes_wb+0xc3/0x250 [ 67.493300][ T7] wb_writeback+0x8db/0xd50 [ 67.497809][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 67.504140][ T7] ? cpumask_next+0x3c/0x40 [ 67.508640][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 67.513977][ T7] wb_workfn+0x9bc/0x1090 [ 67.518324][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 67.523880][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.529608][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.535593][ T7] process_one_work+0x965/0x1690 [ 67.540892][ T7] ? lock_release+0x800/0x800 [ 67.545566][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.551899][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 67.556846][ T7] worker_thread+0x96/0xe10 [ 67.561362][ T7] ? process_one_work+0x1690/0x1690 [ 67.566556][ T7] kthread+0x3b5/0x4a0 [ 67.570621][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.576333][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.582052][ T7] ret_from_fork+0x1f/0x30 [ 67.760196][ T26] tipc: TX() has been purged, node left! executing program [ 68.973748][ T6814] can: request_module (can-proto-0) failed. [ 69.635830][ T6814] can: request_module (can-proto-0) failed. [ 69.648192][ T6814] can: request_module (can-proto-0) failed. [ 69.695940][ T29] audit: type=1400 audit(1592080041.093:9): avc: denied { create } for pid=6809 comm="syz-fuzzer" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dccp_socket permissive=1