INFO: task syz-executor.5:23413 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc6+ #121
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D26888 23413  10069 0x00004006
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x755/0x1580 kernel/sched/core.c:3880
 schedule+0xd9/0x260 kernel/sched/core.c:3947
 io_schedule+0x1c/0x70 kernel/sched/core.c:5603
 wait_on_page_bit_common mm/filemap.c:1166 [inline]
 wait_on_page_bit+0x27c/0xa60 mm/filemap.c:1215
 wait_on_page_writeback+0x1b2/0x4f0 mm/page-writeback.c:2818
 __filemap_fdatawait_range+0x145/0x340 mm/filemap.c:520
 file_write_and_wait_range+0xd1/0x100 mm/filemap.c:777
 __generic_file_fsync+0x79/0x200 fs/libfs.c:996
 fat_file_fsync+0x78/0x210 fs/fat/file.c:199
 vfs_fsync_range+0x141/0x230 fs/sync.c:197
 generic_write_sync include/linux/fs.h:2799 [inline]
 generic_file_write_iter+0x48f/0x620 mm/filemap.c:3492
 call_write_iter include/linux/fs.h:1870 [inline]
 new_sync_write+0x4d3/0x770 fs/read_write.c:483
 __vfs_write+0xe1/0x110 fs/read_write.c:496
 vfs_write+0x268/0x5d0 fs/read_write.c:558
 ksys_write+0x14f/0x290 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:620
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459879
Code: 30 48 c7 44 24 38 00 00 00 00 48 c7 44 24 40 00 00 00 00 48 c7 44 24 48 00 00 00 00 e8 b0 67 ff ff 48 8b 44 24 50 48 8b 4c 24 <58> 48 89 01 48 8b 6c 24 60 48 83 c4 68 c3 e8 14 06 fd ff 0f 0b e8
RSP: 002b:00007f724ca05c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879
RDX: 000000010000005c RSI: 0000000020000580 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f724ca066d4
R13: 00000000004c9902 R14: 00000000004e0f60 R15: 00000000ffffffff
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc6+ #121
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
 watchdog+0x9d0/0xef0 kernel/hung_task.c:289
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9887 Comm: rs:main Q:Reg Not tainted 5.3.0-rc6+ #121
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_acquire+0x1c6/0x410 kernel/locking/lockdep.c:4414
Code: 8b 1c 25 40 fe 01 00 48 8d bb 8c 08 00 00 48 83 c4 20 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 <84> d2 0f 85 0d 02 00 00 48 c7 c0 50 f4 d2 88 48 ba 00 00 00 00 00
RSP: 0018:ffff88808a0f6bb8 EFLAGS: 00000002
RAX: 0000000000000007 RBX: ffff888097a86680 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888097a86f0c
RBP: ffff88808a0f6c00 R08: 0000000000000000 R09: 0000000000000000
R10: fffffbfff134af9f R11: ffff888097a86680 R12: ffffffff88dac440
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002
FS:  00007fa76c5de700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000000a8c55000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rcu_lock_acquire include/linux/rcupdate.h:208 [inline]
 rcu_read_lock include/linux/rcupdate.h:592 [inline]
 is_bpf_text_address+0x39/0x170 kernel/bpf/core.c:708
 kernel_text_address+0x73/0xf0 kernel/extable.c:140
 __kernel_text_address+0xd/0x40 kernel/extable.c:95
 unwind_get_return_address arch/x86/kernel/unwind_frame.c:19 [inline]
 unwind_get_return_address+0x61/0xa0 arch/x86/kernel/unwind_frame.c:14
 arch_stack_walk+0x97/0xf0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0xac/0xe0 kernel/stacktrace.c:123
 save_stack+0x23/0x90 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:493 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:466
 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:501
 slab_post_alloc_hook mm/slab.h:520 [inline]
 slab_alloc mm/slab.c:3319 [inline]
 kmem_cache_alloc+0x121/0x710 mm/slab.c:3483
 mempool_alloc_slab+0x47/0x60 mm/mempool.c:513
 mempool_alloc+0x169/0x380 mm/mempool.c:393
 bio_alloc_bioset+0x3b9/0x680 block/bio.c:477
 bio_alloc include/linux/bio.h:400 [inline]
 io_submit_init_bio fs/ext4/page-io.c:366 [inline]
 io_submit_add_bh fs/ext4/page-io.c:391 [inline]
 ext4_bio_write_page+0xe1d/0x1722 fs/ext4/page-io.c:503
 mpage_submit_page+0x15a/0x270 fs/ext4/inode.c:2253
 mpage_process_page_bufs+0x60c/0x720 fs/ext4/inode.c:2364
 mpage_prepare_extent_to_map+0xa05/0xf90 fs/ext4/inode.c:2722
 ext4_writepages+0x998/0x2ec0 fs/ext4/inode.c:2850
 ? 0xffffffff81000000
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2342
 __filemap_fdatawrite_range+0x26d/0x340 mm/filemap.c:415
 file_write_and_wait_range+0x9a/0x100 mm/filemap.c:773
 __generic_file_fsync+0x79/0x200 fs/libfs.c:996
 ext4_sync_file+0x89a/0x15c0 fs/ext4/fsync.c:120
 vfs_fsync_range+0x141/0x230 fs/sync.c:197
 generic_write_sync include/linux/fs.h:2799 [inline]
 ext4_file_write_iter+0x839/0x1430 fs/ext4/file.c:281
 call_write_iter include/linux/fs.h:1870 [inline]
 new_sync_write+0x4d3/0x770 fs/read_write.c:483
 __vfs_write+0xe1/0x110 fs/read_write.c:496
 vfs_write+0x268/0x5d0 fs/read_write.c:558
 ksys_write+0x14f/0x290 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:620
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fa76e03c19d
Code: d1 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 be fa ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 07 fb ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fa76c5dd000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000199 RCX: 00007fa76e03c19d
RDX: 0000000000000199 RSI: 000000000170cce0 RDI: 0000000000000005
RBP: 000000000170cce0 R08: 000000000170ce1e R09: 00007fa76d9b8cb7
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa76c5dd480 R14: 000000000000000f R15: 000000000170cae0