INFO: task syz.3.8079:7274 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.8079      state:D stack:27088 pid:7274  tgid:7273  ppid:3904   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 cgroup_lock_and_drain_offline+0x51a/0x650
 cgroup1_get_tree+0x9d/0x890
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x319/0xdc0
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe26559e159
RSP: 002b:00007fe2664ea028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe265825fa0 RCX: 00007fe26559e159
RDX: 00002000000001c0 RSI: 0000200000000100 RDI: 0000000000000000
RBP: 00007fe26563506b R08: 0000200000000000 R09: 0000000000000000
R10: 0000000001010042 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe265826038 R14: 00007fe265825fa0 R15: 00007ffca51d3888
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by udevd/5045:
2 locks held by getty/5425:
 #0: ffff88816c0b90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
3 locks held by kworker/u8:5/20297:
1 lock held by syz.8.3236/21958:
1 lock held by syz.8.7054/3716:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x380
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 3716 Comm: syz.8.7054 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:kasan_check_range+0x183/0x2c0
Code: 41 bf 08 00 00 00 41 29 ef 4d 01 fb 4d 29 de 4d 89 f4 4d 8d 6c 24 07 4d 85 e4 4d 0f 49 ec 49 c1 ed 03 45 85 ed 74 24 45 31 f6 <4f> 8b 3c 33 4d 85 ff 75 4b 49 83 c6 08 41 ff cd 75 ee 4d 89 cc 4d
RSP: 0018:ffffc9000390e968 EFLAGS: 00000202
RAX: ffffc9000390ef01 RBX: dffffc0000000001 RCX: ffffffff84d12ab0
RDX: 0000000000000001 RSI: 0000000000001000 RDI: ffff88810aab8000
RBP: 0000000000000000 R08: ffff88810aab8fff R09: 1ffff110215571ff
R10: dffffc0000000000 R11: ffffed1021557000 R12: 0000000000000200
R13: 0000000000000026 R14: 00000000000000d0 R15: 0000000000000000
FS:  00007ffb982206c0(0000) GS:ffff8882a8f59000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2b1cdef2f8 CR3: 000000011e29a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __asan_memset+0x22/0x50
 iov_iter_zero+0xb60/0x16b0
 read_kcore_iter+0x1156/0x1940
 __kernel_read+0x4ca/0x960
 integrity_kernel_read+0x89/0xd0
 ima_calc_file_hash+0x451/0x890
 ima_collect_measurement+0x51b/0xa00
 process_measurement+0x1272/0x1c10
 ima_file_check+0xe1/0x130
 security_file_post_open+0xb3/0x260
 path_openat+0x2e90/0x3830
 do_file_open+0x23e/0x4a0
 do_sys_openat2+0x115/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffb9739e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffb98220028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffb97625fa0 RCX: 00007ffb9739e159
RDX: 0000000000000000 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007ffb9743506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffb97626038 R14: 00007ffb97625fa0 R15: 00007ffe9f75f438
 </TASK>
