slab mnt_cache start ffff88801bf28c40 pointer offset 184 size 352
list_del corruption. prev->next should be ffff88801cba75b8, but was ffff88801bf28cf8. (prev=ffff88801bf28cf8)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:62!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 10586 Comm: syz.3.1281 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__list_del_entry_valid_or_report+0x14a/0x1d0 lib/list_debug.c:62
Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8d 00 00 00 48 8b 55 00 48 89 e9 48 89 de 48 c7 c7 40 f4 1a 8c e8 a7 bc 24 fc 90 <0f> 0b 4c 89 e7 e8 2c 5c 52 fd 48 89 ea 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc9000321fa18 EFLAGS: 00010286
RAX: 000000000000006d RBX: ffff88801cba75b8 RCX: 0000000000000000
RDX: 000000000000006d RSI: ffffffff81e78a29 RDI: fffff52000643f34
RBP: ffff88801bf28cf8 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801bf28cf8
R13: ffffc9000321fae0 R14: ffff88801cba7500 R15: ffff88801cba75b8
FS:  0000000000000000(0000) GS:ffff8880d6448000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7a8cf4da08 CR3: 000000005fa08000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 000000000000afe8 DR2: 000000000000004e
DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:132 [inline]
 __list_del_entry include/linux/list.h:223 [inline]
 list_del_init include/linux/list.h:295 [inline]
 trace_transfers fs/pnode.c:132 [inline]
 bulk_make_private+0xd8/0x720 fs/pnode.c:168
 umount_tree+0x3fb/0xec0 fs/namespace.c:1786
 put_mnt_ns+0x267/0x300 fs/namespace.c:6230
 nsproxy_free kernel/nsproxy.c:65 [inline]
 deactivate_nsproxy kernel/nsproxy.c:79 [inline]
 put_nsproxy include/linux/nsproxy.h:110 [inline]
 put_nsproxy include/linux/nsproxy.h:107 [inline]
 switch_task_namespaces+0x133/0x2c0 kernel/nsproxy.c:252
 do_exit+0x824/0x2aa0 kernel/exit.c:970
 do_group_exit+0xd5/0x2a0 kernel/exit.c:1112
 get_signal+0x1ec7/0x21e0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x86/0x4a0 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x67c/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f217395cece
Code: Unable to access opcode bytes at 0x7f217395cea4.
RSP: 002b:00007f2174862f58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f21748636c0 RCX: 00007f217395cece
RDX: 00007f2174862fb0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f2173a32b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2173c16038 R14: 00007f2173c15fa0 R15: 00007ffed2beb248
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x14a/0x1d0 lib/list_debug.c:62
Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8d 00 00 00 48 8b 55 00 48 89 e9 48 89 de 48 c7 c7 40 f4 1a 8c e8 a7 bc 24 fc 90 <0f> 0b 4c 89 e7 e8 2c 5c 52 fd 48 89 ea 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc9000321fa18 EFLAGS: 00010286
RAX: 000000000000006d RBX: ffff88801cba75b8 RCX: 0000000000000000
RDX: 000000000000006d RSI: ffffffff81e78a29 RDI: fffff52000643f34
RBP: ffff88801bf28cf8 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801bf28cf8
R13: ffffc9000321fae0 R14: ffff88801cba7500 R15: ffff88801cba75b8
FS:  0000000000000000(0000) GS:ffff8880d6448000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7a8cf4da08 CR3: 000000005fa08000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 000000000000afe8 DR2: 000000000000004e
DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000600