------------[ cut here ]------------
WARNING: CPU: 1 PID: 2114 at fs/ext4/page-io.c:205 ext4_add_complete_io fs/ext4/page-io.c:205 [inline]
WARNING: CPU: 1 PID: 2114 at fs/ext4/page-io.c:205 ext4_put_io_end_defer+0x2bb/0x3b0 fs/ext4/page-io.c:268
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2114 Comm: syz-executor4 Not tainted 4.9.133+ #52
 ffff8801db707a48 ffffffff81b37069 ffffffff82a38ba0 00000000ffffffff
 0000000000000000 0000000000000001 00000000000000cd ffff8801db707b08
 ffffffff813f6a45 0000000041b58ab3 ffffffff82e299a3 ffffffff813f6886
Call Trace:
 <IRQ> [  577.123855]  [<ffffffff81b37069>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  577.123855]  [<ffffffff81b37069>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813f6a45>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813f6d14>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff810dbe2c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff816e8cfb>] ext4_add_complete_io fs/ext4/page-io.c:205 [inline]
 [<ffffffff816e8cfb>] ext4_put_io_end_defer+0x2bb/0x3b0 fs/ext4/page-io.c:268
 [<ffffffff816e8f26>] ext4_end_bio+0x136/0x460 fs/ext4/page-io.c:324
 [<ffffffff81aaa165>] bio_endio+0x1a5/0x1f0 block/bio.c:1781
 [<ffffffff81aca7c8>] req_bio_endio block/blk-core.c:157 [inline]
 [<ffffffff81aca7c8>] blk_update_request+0x248/0x9b0 block/blk-core.c:2628
 [<ffffffff81e107bd>] scsi_end_request+0x9d/0x5c0 drivers/scsi/scsi_lib.c:606
 [<ffffffff81e197c3>] scsi_io_completion+0x273/0x17a0 drivers/scsi/scsi_lib.c:829
 [<ffffffff81dfc6ea>] scsi_finish_command+0x3ba/0x530 drivers/scsi/scsi.c:607
 [<ffffffff81e17cf0>] scsi_softirq_done+0x250/0x360 drivers/scsi/scsi_lib.c:1567
 [<ffffffff81ae868d>] blk_done_softirq+0x27d/0x3e0 block/blk-softirq.c:35
 [<ffffffff82808d00>] __do_softirq+0x210/0x940 kernel/softirq.c:288
 [<ffffffff810efb24>] invoke_softirq kernel/softirq.c:368 [inline]
 [<ffffffff810efb24>] irq_exit+0x114/0x150 kernel/softirq.c:409
 [<ffffffff82805d1d>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<ffffffff82805d1d>] do_IRQ+0x10d/0x1c0 arch/x86/kernel/irq.c:252
 [<ffffffff8280431d>] common_interrupt+0x9d/0x9d arch/x86/entry/entry_64.S:461
 <EOI> [  577.291843]  [<ffffffff8120cd87>] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline]
 <EOI> [  577.291843]  [<ffffffff8120cd87>] ? lock_release+0x557/0xc20 kernel/locking/lockdep.c:3778
 [<ffffffff819e1d31>] rcu_lock_release include/linux/rcupdate.h:498 [inline]
 [<ffffffff819e1d31>] rcu_read_unlock include/linux/rcupdate.h:931 [inline]
 [<ffffffff819e1d31>] avc_has_perm_noaudit security/selinux/avc.c:1120 [inline]
 [<ffffffff819e1d31>] avc_has_perm+0x181/0x3a0 security/selinux/avc.c:1146
 [<ffffffff819ec11c>] task_has_perm+0x1fc/0x330 security/selinux/hooks.c:1615
 [<ffffffff819ec273>] selinux_task_wait+0x23/0x30 security/selinux/hooks.c:3954
 [<ffffffff819db063>] security_task_wait+0x73/0xb0 security/security.c:1032
 [<ffffffff810e8f71>] wait_consider_task+0x2a1/0x3620 kernel/exit.c:1377
 [<ffffffff810ec713>] do_wait_thread kernel/exit.c:1490 [inline]
 [<ffffffff810ec713>] do_wait+0x423/0x950 kernel/exit.c:1561
 [<ffffffff810ed78b>] SYSC_wait4 kernel/exit.c:1693 [inline]
 [<ffffffff810ed78b>] SyS_wait4+0x12b/0x1f0 kernel/exit.c:1658
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82803a13>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Shutting down cpus with NMI
Kernel Offset: disabled
Rebooting in 86400 seconds..