list_add corruption. prev->next should be next (ffffffff89db3ea0), but was 0000000000000000. (prev=ffff8881d55727e0).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:28!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
kobject: 'loop4' (000000001bac0dba): fill_kobj_path: path = '/devices/virtual/block/loop4'
CPU: 1 PID: 12057 Comm: syz-executor0 Not tainted 4.20.0-rc4+ #358
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_add_valid.cold.2+0x23/0x2a lib/list_debug.c:26
kobject: 'kvm' (000000003b2ea923): kobject_uevent_env
Code: e8 d0 22 d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 bf 22 d2 fd 0f 0b 48 89 f1 48 c7 c7 a0 d2 60 88 48 89 de e8 ab 22 d2 fd <0f> 0b 90 90 90 90 90 55 48 89 e5 41 57 41 56 49 be 00 00 00 00 00
RSP: 0018:ffff88817a45f948 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffffffff89db3ea0 RCX: ffffc90005dde000
RDX: 0000000000000000 RSI: ffffffff8165eac5 RDI: 0000000000000005
kobject: 'kvm' (000000003b2ea923): fill_kobj_path: path = '/devices/virtual/misc/kvm'
RBP: ffff88817a45f960 R08: ffff8881c78ac2c0 R09: ffffed103b5e5020
R10: ffffed103b5e5020 R11: ffff8881daf28107 R12: ffff888180a78f60
R13: ffff888180a78f60 R14: ffff8881d55727e0 R15: ffff888180a79130
FS:  00007f55cc707700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000072c000 CR3: 00000001b67bf000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_add include/linux/list.h:60 [inline]
 list_add_tail include/linux/list.h:93 [inline]
 cma_listen_on_all drivers/infiniband/core/cma.c:2474 [inline]
 rdma_listen+0x6dc/0x990 drivers/infiniband/core/cma.c:3489
 ucma_listen+0x1a4/0x260 drivers/infiniband/core/ucma.c:1100
 ucma_write+0x365/0x460 drivers/infiniband/core/ucma.c:1689
 __vfs_write+0x119/0x9f0 fs/read_write.c:485
 vfs_write+0x1fc/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f55cc706c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000010 RSI: 00000000200003c0 RDI: 0000000000000003
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f55cc7076d4
R13: 00000000004c5b7d R14: 00000000004d9e68 R15: 00000000ffffffff
Modules linked in:
kobject: 'kvm' (000000003b2ea923): kobject_uevent_env
---[ end trace e5bdc7aa5685ba5d ]---
kobject: 'kvm' (000000003b2ea923): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'serio2' (0000000028da5182): kobject_add_internal: parent: 'devices', set: 'devices'
kobject: 'kvm' (000000003b2ea923): kobject_uevent_env
RIP: 0010:__list_add_valid.cold.2+0x23/0x2a lib/list_debug.c:26
Code: e8 d0 22 d2 fd 0f 0b 48 89 d9 48 c7 c7 20 d2 60 88 e8 bf 22 d2 fd 0f 0b 48 89 f1 48 c7 c7 a0 d2 60 88 48 89 de e8 ab 22 d2 fd <0f> 0b 90 90 90 90 90 55 48 89 e5 41 57 41 56 49 be 00 00 00 00 00
kobject: 'kvm' (000000003b2ea923): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'serio2' (0000000028da5182): kobject_uevent_env
kobject: 'kvm' (000000003b2ea923): kobject_uevent_env
kobject: 'kvm' (000000003b2ea923): fill_kobj_path: path = '/devices/virtual/misc/kvm'
RSP: 0018:ffff88817a45f948 EFLAGS: 00010286
kobject: 'loop5' (00000000b3012df7): kobject_uevent_env
RAX: 0000000000000075 RBX: ffffffff89db3ea0 RCX: ffffc90005dde000
kobject: 'serio2' (0000000028da5182): fill_kobj_path: path = '/devices/serio2'
kobject: 'loop5' (00000000b3012df7): fill_kobj_path: path = '/devices/virtual/block/loop5'
RDX: 0000000000000000 RSI: ffffffff8165eac5 RDI: 0000000000000005
kobject: 'kvm' (000000003b2ea923): kobject_uevent_env
RBP: ffff88817a45f960 R08: ffff8881c78ac2c0 R09: ffffed103b5e5020
kobject: 'kvm' (000000003b2ea923): fill_kobj_path: path = '/devices/virtual/misc/kvm'
R10: ffffed103b5e5020 R11: ffff8881daf28107 R12: ffff888180a78f60
R13: ffff888180a78f60 R14: ffff8881d55727e0 R15: ffff888180a79130
kobject: 'loop1' (0000000094052850): kobject_uevent_env
kobject: 'loop1' (0000000094052850): fill_kobj_path: path = '/devices/virtual/block/loop1'
FS:  00007f55cc707700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'kvm' (000000003b2ea923): kobject_uevent_env
CR2: 0000001b2c125000 CR3: 00000001b67bf000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kobject: 'kvm' (000000003b2ea923): fill_kobj_path: path = '/devices/virtual/misc/kvm'
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400