syz-executor0(7883): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(7883): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(7883): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(7883): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(7883): getblk(): executed=9 bh_count=0 bh_state=0
INFO: task syz-executor7:7893 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc7-next-20180801+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor7   D24464  7893   4272 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2823 [inline]
 __schedule+0x87c/0x1ec0 kernel/sched/core.c:3471
 schedule+0xfb/0x450 kernel/sched/core.c:3515
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
 rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0xc3/0x1d0 kernel/locking/rwsem.c:26
 __get_super.part.12+0x20f/0x2e0 fs/super.c:787
 __get_super include/linux/spinlock.h:329 [inline]
 get_super+0x2d/0x50 fs/super.c:816
 fsync_bdev+0x17/0xc0 fs/block_dev.c:469
 invalidate_partition+0x35/0x60 block/genhd.c:1561
 drop_partitions.isra.13+0xe8/0x200 block/partition-generic.c:445
 rescan_partitions+0x75/0x910 block/partition-generic.c:518
 __blkdev_reread_part+0x1ad/0x230 block/ioctl.c:173
 blkdev_reread_part+0x26/0x40 block/ioctl.c:193
 loop_reread_partitions+0x163/0x190 drivers/block/loop.c:645
 loop_set_status+0xb95/0x1010 drivers/block/loop.c:1199
 loop_set_status64+0xaa/0x100 drivers/block/loop.c:1317
 lo_ioctl+0x90e/0x1d70 drivers/block/loop.c:1433
 __blkdev_driver_ioctl block/ioctl.c:303 [inline]
 blkdev_ioctl+0x9cd/0x2030 block/ioctl.c:601
 block_ioctl+0xee/0x130 fs/block_dev.c:1883
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
 __do_sys_ioctl fs/ioctl.c:709 [inline]
 __se_sys_ioctl fs/ioctl.c:707 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456a09
Code: 24 00 00 00 e8 e8 4e fd ff 0f 0b e8 c1 34 00 00 e9 3c ff ff ff cc cc cc cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff <48> 3b 61 10 76 40 48 83 ec 28 48 89 6c 24 20 48 8d 6c 24 20 48 8b
RSP: 002b:00007fa57c094c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa57c0956d4 RCX: 0000000000456a09
RDX: 0000000020000000 RSI: 0000000000004c04 RDI: 0000000000000013
RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004ce4e0 R14: 00000000004c4d51 R15: 0000000000000001
INFO: task blkid:7880 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc7-next-20180801+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D20048  7880  13090 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2823 [inline]
 __schedule+0x87c/0x1ec0 kernel/sched/core.c:3471
 schedule+0xfb/0x450 kernel/sched/core.c:3515
 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3573
 __mutex_lock_common kernel/locking/mutex.c:1003 [inline]
 __mutex_lock+0xbf9/0x1700 kernel/locking/mutex.c:1073
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088
 blkdev_put+0x34/0x540 fs/block_dev.c:1816
 blkdev_close+0x8b/0xb0 fs/block_dev.c:1865
 __fput+0x376/0x8a0 fs/file_table.c:279
 ____fput+0x15/0x20 fs/file_table.c:312
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1bf61d62b0
Code: Bad RIP value.
RSP: 002b:00007ffcac0f0df8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1bf61d62b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000018 R09: 0000000001680000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000fbc030
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005
INFO: task syz-executor0:7882 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc7-next-20180801+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D25008  7882  29282 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2823 [inline]
 __schedule+0x87c/0x1ec0 kernel/sched/core.c:3471
 schedule+0xfb/0x450 kernel/sched/core.c:3515
 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3573
 __mutex_lock_common kernel/locking/mutex.c:1003 [inline]
 __mutex_lock+0xbf9/0x1700 kernel/locking/mutex.c:1073
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088
 blkdev_put+0x34/0x540 fs/block_dev.c:1816
 blkdev_close+0x8b/0xb0 fs/block_dev.c:1865
 __fput+0x376/0x8a0 fs/file_table.c:279
 ____fput+0x15/0x20 fs/file_table.c:312
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4105c1
Code: 16 00 00 00 e8 30 b3 01 00 0f 0b 48 89 54 24 18 66 89 44 24 16 e8 bf bc 01 00 48 8d 05 ef ec 4b 00 48 89 04 24 48 c7 44 24 08 <16> 00 00 00 e8 46 c6 01 00 e8 f1 be 01 00 0f b7 44 24 16 0f b7 c0
RSP: 002b:00007fff6418dd40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000015 RCX: 00000000004105c1
RDX: 0000000000000000 RSI: 0000000000730390 RDI: 0000000000000014
RBP: 0000000000000010 R08: 00000000000000a0 R09: ffffffffffffffff
R10: 0000000000930140 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000069326 R14: 0000000000000120 R15: badc0ffeebadface
INFO: task syz-executor0:7952 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc7-next-20180801+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D24840  7952  29282 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2823 [inline]
 __schedule+0x87c/0x1ec0 kernel/sched/core.c:3471
 schedule+0xfb/0x450 kernel/sched/core.c:3515
 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3573
 __mutex_lock_common kernel/locking/mutex.c:1003 [inline]
 __mutex_lock+0xbf9/0x1700 kernel/locking/mutex.c:1073
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088
 __blkdev_get+0x19b/0x13c0 fs/block_dev.c:1466
 blkdev_get+0xc1/0xb50 fs/block_dev.c:1617
 blkdev_open+0x1fb/0x280 fs/block_dev.c:1775
 do_dentry_open+0x49c/0x1140 fs/open.c:771
 vfs_open+0xa0/0xd0 fs/open.c:880
 do_last fs/namei.c:3418 [inline]
 path_openat+0x12fb/0x5300 fs/namei.c:3534
 do_filp_open+0x255/0x380 fs/namei.c:3564
 do_sys_open+0x584/0x720 fs/open.c:1063
 __do_sys_open fs/open.c:1081 [inline]
 __se_sys_open fs/open.c:1076 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1076
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x410741
Code: 8b 51 30 48 8b 92 98 00 00 00 48 85 d2 0f 84 3f 07 00 00 48 8b 8a 68 01 00 00 48 29 c1 48 89 8a 68 01 00 00 48 85 c9 0f 8c 0d <07> 00 00 64 48 8b 04 25 f8 ff ff ff 48 8b 48 30 8b 99 d8 00 00 00
RSP: 002b:00007f67699daa80 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000020000168 RCX: 0000000000410741
RDX: 00007f67699daafa RSI: 0000000000000002 RDI: 00007f67699daaf0
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000001 R14: 00000000004c8f38 R15: 0000000000000001
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 774 Comm: khungtaskd Not tainted 4.18.0-rc7-next-20180801+ #29
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+0x1c9/0x2b4 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x151/0x192 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+0xb39/0x10b0 kernel/hung_task.c:265
 kthread+0x35a/0x420 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7883 Comm: syz-executor0 Not tainted 4.18.0-rc7-next-20180801+ #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_pc+0x3f/0x50 kernel/kcov.c:106
Code: e2 00 01 1f 00 48 8b 75 08 75 2b 8b 90 88 12 00 00 83 fa 02 75 20 48 8b 88 90 12 00 00 8b 80 8c 12 00 00 48 8b 11 48 83 c2 01 <48> 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 55 40 0f b6 d6
RSP: 0018:ffff88018f98f220 EFLAGS: 00000216
RAX: 0000000000040000 RBX: ffff8801cc4a42a0 RCX: ffffc90012bb2000
RDX: 0000000000040000 RSI: ffffffff81d6e392 RDI: 0000000000000007
RBP: ffff88018f98f220 R08: ffff880188e1e3c0 R09: ffffed0031f31d99
R10: ffffed0031f31d99 R11: 0000000000000003 R12: dffffc0000000000
R13: 0000000000000a09 R14: 0000000000000000 R15: 0000000000000020
FS:  00007f67699fc700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000001d8e6f000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 init_page_buffers+0x3e2/0x530 fs/buffer.c:912
 grow_dev_page fs/buffer.c:955 [inline]
 grow_buffers fs/buffer.c:1030 [inline]
 __getblk_slow fs/buffer.c:1063 [inline]
 __getblk_gfp+0xb50/0xe00 fs/buffer.c:1352
 __bread_gfp+0x2d/0x310 fs/buffer.c:1386
 sb_bread include/linux/buffer_head.h:307 [inline]
 fat__get_entry+0x59c/0xa30 fs/fat/dir.c:101
 fat_get_entry fs/fat/dir.c:129 [inline]
 fat_get_short_entry+0x13c/0x2c0 fs/fat/dir.c:876
 fat_subdirs+0x13c/0x290 fs/fat/dir.c:942
 fat_read_root fs/fat/inode.c:1421 [inline]
 fat_fill_super+0x29f6/0x4430 fs/fat/inode.c:1851
 msdos_fill_super+0x2e/0x40 fs/fat/namei_msdos.c:652
 mount_bdev+0x314/0x3e0 fs/super.c:1344
 msdos_mount+0x3c/0x50 fs/fat/namei_msdos.c:659
 legacy_get_tree+0x131/0x460 fs/fs_context.c:729
 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1743
 do_new_mount fs/namespace.c:2603 [inline]
 do_mount+0x6f2/0x1e20 fs/namespace.c:2927
 ksys_mount+0x12d/0x140 fs/namespace.c:3143
 __do_sys_mount fs/namespace.c:3157 [inline]
 __se_sys_mount fs/namespace.c:3154 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3154
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45943a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 bd 8a 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 9a 8a fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f67699fba88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f67699fbb30 RCX: 000000000045943a
RDX: 00007f67699fbad0 RSI: 00000000200003c0 RDI: 00007f67699fbaf0
RBP: 00000000200003c0 R08: 00007f67699fbb30 R09: 00007f67699fbad0
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000013
R13: 0000000000000000 R14: 00000000004c8f38 R15: 0000000000000000