syz-executor0(19457): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(19457): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(19457): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(19457): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(19457): getblk(): executed=9 bh_count=0 bh_state=0
INFO: task jbd2/sda1-8:3305 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc6-next-20181005+ #88
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
jbd2/sda1-8     D19424  3305      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2830 [inline]
 __schedule+0x86c/0x1ed0 kernel/sched/core.c:3479
 schedule+0xfe/0x460 kernel/sched/core.c:3523
 io_schedule+0x1c/0x70 kernel/sched/core.c:5144
 bit_wait_io+0xf/0x90 kernel/sched/wait_bit.c:207
 __wait_on_bit+0xb3/0x130 kernel/sched/wait_bit.c:48
 out_of_line_wait_on_bit+0x213/0x3c0 kernel/sched/wait_bit.c:63
 wait_on_bit_io include/linux/wait_bit.h:101 [inline]
 __wait_on_buffer+0x71/0x90 fs/buffer.c:118
 wait_on_buffer include/linux/buffer_head.h:354 [inline]
 journal_wait_on_commit_record fs/jbd2/commit.c:175 [inline]
 jbd2_journal_commit_transaction+0x638f/0x89da fs/jbd2/commit.c:866
 kjournald2+0x26d/0xb30 fs/jbd2/journal.c:229
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 981 Comm: khungtaskd Not tainted 4.19.0-rc6-next-20181005+ #88
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+0x1d3/0x2c4 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.4+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1c2/0x22c 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:144 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline]
 watchdog+0xb39/0x1050 kernel/hung_task.c:265
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.263 msecs
NMI backtrace for cpu 1
CPU: 1 PID: 19457 Comm: syz-executor0 Not tainted 4.19.0-rc6-next-20181005+ #88
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:xas_start+0x66/0x740 lib/xarray.c:154
Code: 8a b5 41 48 c7 85 00 ff ff ff 88 6b ec 88 4c 8d 7b 18 48 c7 85 08 ff ff ff c0 db b3 87 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 <c7> 40 08 f2 f2 f2 f2 c7 40 0c 00 f2 f2 f2 c7 40 10 f2 f2 f2 f2 c7
RSP: 0018:ffff880180f36880 EFLAGS: 00000282
RAX: ffffed00301e6d12 RBX: ffff880180f36aa0 RCX: ffffc90001e62000
RDX: 0000000000040000 RSI: ffffffff87b3f209 RDI: ffff880180f36aa0
RBP: ffff880180f36998 R08: ffff8801ce8e4280 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff100301e6d12
R13: dffffc0000000000 R14: ffff880180f36970 R15: ffff880180f36ab8
FS:  00007fef603cf700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004cc9e8 CR3: 000000017e14e000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 xas_load+0x21/0x1e0 lib/xarray.c:207
 find_get_entry+0x3ca/0x1120 mm/filemap.c:1415
 pagecache_get_page+0x12f/0xf00 mm/filemap.c:1518
 find_get_page_flags include/linux/pagemap.h:278 [inline]
 __find_get_block_slow fs/buffer.c:205 [inline]
 __find_get_block+0x635/0xf10 fs/buffer.c:1325
 __getblk_slow fs/buffer.c:1058 [inline]
 __getblk_gfp+0x3d3/0x1030 fs/buffer.c:1351
 __bread_gfp+0x2d/0x300 fs/buffer.c:1385
 sb_bread include/linux/buffer_head.h:307 [inline]
 fat__get_entry+0x5a6/0xa40 fs/fat/dir.c:101
 fat_get_entry fs/fat/dir.c:129 [inline]
 fat_get_short_entry+0x13c/0x2c0 fs/fat/dir.c:878
 fat_subdirs+0x142/0x290 fs/fat/dir.c:944
 fat_read_root fs/fat/inode.c:1417 [inline]
 fat_fill_super+0x2a7c/0x42c0 fs/fat/inode.c:1847
 vfat_fill_super+0x31/0x40 fs/fat/namei_vfat.c:1049
 mount_bdev+0x314/0x3e0 fs/super.c:1356
 vfat_mount+0x3c/0x50 fs/fat/namei_vfat.c:1056
 legacy_get_tree+0x131/0x460 fs/fs_context.c:718
 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1795
 do_new_mount fs/namespace.c:2648 [inline]
 do_mount+0x70c/0x1d90 fs/namespace.c:2974
 ksys_mount+0x12d/0x140 fs/namespace.c:3190
 __do_sys_mount fs/namespace.c:3204 [inline]
 __se_sys_mount fs/namespace.c:3201 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3201
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459fea
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 9d 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 7a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007fef603cea88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fef603ceb30 RCX: 0000000000459fea
RDX: 00007fef603cead0 RSI: 00000000200004c0 RDI: 00007fef603ceaf0
RBP: 00000000200004c0 R08: 00007fef603ceb30 R09: 00007fef603cead0
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
R13: 0000000000000000 R14: 00000000004d7ed8 R15: 00000000ffffffff