INFO: task syz-executor267:6851 blocked for more than 143 seconds.
      Not tainted 5.9.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor267 state:D stack:27632 pid: 6851 ppid:  6840 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3778 [inline]
 __schedule+0xea9/0x2230 kernel/sched/core.c:4527
 schedule+0xd0/0x2a0 kernel/sched/core.c:4602
 io_schedule+0xb5/0x120 kernel/sched/core.c:6296
 wait_on_page_bit_common+0x52c/0xca0 mm/filemap.c:1191
 wait_on_page_bit mm/filemap.c:1216 [inline]
 wait_on_page_locked include/linux/pagemap.h:611 [inline]
 do_read_cache_page+0x257/0x1390 mm/filemap.c:2915
 read_mapping_page include/linux/pagemap.h:437 [inline]
 read_part_sector+0xf6/0x5af block/partitions/core.c:770
 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360
 check_partition block/partitions/core.c:140 [inline]
 blk_add_partitions+0x44b/0xe10 block/partitions/core.c:698
 bdev_disk_changed+0x1ea/0x370 fs/block_dev.c:1416
 __blkdev_get+0xee4/0x1aa0 fs/block_dev.c:1559
 blkdev_get fs/block_dev.c:1639 [inline]
 blkdev_open+0x227/0x300 fs/block_dev.c:1753
 do_dentry_open+0x4b9/0x11b0 fs/open.c:817
 do_open fs/namei.c:3251 [inline]
 path_openat+0x1b9a/0x2730 fs/namei.c:3368
 do_filp_open+0x17e/0x3c0 fs/namei.c:3395
 do_sys_openat2+0x16d/0x420 fs/open.c:1168
 do_sys_open fs/open.c:1184 [inline]
 __do_sys_open fs/open.c:1192 [inline]
 __se_sys_open fs/open.c:1188 [inline]
 __x64_sys_open+0x119/0x1c0 fs/open.c:1188
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4057a1
Code: Bad RIP value.
RSP: 002b:00007fa71f978980 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004057a1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fa71f978990
RBP: 6666666666666667 R08: 000000000000000f R09: 00007fa71f979700
R10: 00007fa71f9799d0 R11: 0000000000000293 R12: 00000000006dbc2c
R13: 00007ffe65f5395f R14: 00007fa71f9799c0 R15: 20c49ba5e353f7cf

Showing all locks held in the system:
1 lock held by khungtaskd/1173:
 #0: ffffffff89bd6a40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5829
1 lock held by in:imklog/6524:
 #0: ffff88809ed8f430 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930
1 lock held by syz-executor267/6851:
 #0: ffff88808aefa980 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x4b8/0x1aa0 fs/block_dev.c:1492

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1173 Comm: khungtaskd Not tainted 5.9.0-rc3-syzkaller #0
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+0x198/0x1fd lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
 watchdog+0xd7d/0x1000 kernel/hung_task.c:295
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3908 Comm: systemd-journal Not tainted 5.9.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:34 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:200 [inline]
RIP: 0010:trace_irq_enable_rcuidle include/trace/events/preemptirq.h:40 [inline]
RIP: 0010:trace_hardirqs_on+0x85/0x220 kernel/trace/trace_preemptirq.c:44
Code: 41 ea df ff 48 8b 7c 24 28 5b 5d 41 5c 41 5d 41 5e e9 1f 9b 79 06 e8 2a 38 fa ff 4c 8b 6c 24 28 0f 1f 44 00 00 e8 1b 38 fa ff <eb> b9 e8 14 38 fa ff 65 8b 1d 6d 80 87 7e bf 3f 00 00 00 89 de e8
RSP: 0018:ffffc900046e7d90 EFLAGS: 00000093
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817a129c
RDX: ffff8880a922e040 RSI: ffffffff817a12e5 RDI: 0000000000000005
RBP: ffff88809a981240 R08: 000000005f2da179 R09: ffff8880a922e920
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000200
R13: ffffffff81b3e9a1 R14: ffffffff8358cfe3 R15: 0000000000000000
FS:  00007f4c80bbb8c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c7df5f018 CR3: 00000000929fe000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kfree+0x221/0x2b0 mm/slab.c:3757
 security_cred_free+0xc3/0x130 security/security.c:1625
 put_cred_rcu+0x122/0x4a0 kernel/cred.c:114
 __put_cred+0x1de/0x250 kernel/cred.c:148
 put_cred include/linux/cred.h:287 [inline]
 put_cred include/linux/cred.h:280 [inline]
 revert_creds+0x1a8/0x1f0 kernel/cred.c:598
 do_faccessat+0x2ca/0x820 fs/open.c:464
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4c7fe779c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffdac844f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffdac847e70 RCX: 00007f4c7fe779c7
RDX: 00007f4c808e8a00 RSI: 0000000000000000 RDI: 000055e0fbea49a3
RBP: 00007ffdac844f90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffdac847e70 R15: 00007ffdac845480