list_add corruption. prev->next should be next (ffff888097c8c170), but was ffffffff8a3d52a0. (prev=ffff8880a6dda1e0).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:26!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9575 Comm: syz-executor448 Not tainted 5.6.0-rc3-next-20200228-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_add_valid.cold+0x3a/0x3c lib/list_debug.c:26
Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 80 18 72 88 e8 c4 e9 c8 fd 0f 0b 48 89 f1 48 c7 c7 00 18 72 88 4c 89 e6 e8 b0 e9 c8 fd <0f> 0b 48 89 ee 48 c7 c7 a0 19 72 88 e8 9f e9 c8 fd 0f 0b 4c 89 ea
RSP: 0018:ffffc90002407c00 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff888097a9f000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815c4e91 RDI: fffff52000480f72
RBP: ffff888097a9f1e0 R08: 0000000000000075 R09: ffffed1015cc6661
R10: ffffed1015cc6660 R11: ffff8880ae633307 R12: ffff888097c8c170
R13: ffff8880a6dda1e0 R14: ffff888097a9f1e0 R15: ffff888097c8c170
FS:  00007f3ff7f6f700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa463b63000 CR3: 00000000a28d8000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_add include/linux/list.h:67 [inline]
 list_add_tail include/linux/list.h:100 [inline]
 _cma_attach_to_dev+0x198/0x360 drivers/infiniband/core/cma.c:477
 cma_listen_on_dev+0x252/0x6d0 drivers/infiniband/core/cma.c:2498
 cma_listen_on_all drivers/infiniband/core/cma.c:2519 [inline]
 rdma_listen+0x739/0x910 drivers/infiniband/core/cma.c:3635
 ucma_listen+0x14d/0x1c0 drivers/infiniband/core/ucma.c:1092
 ucma_write+0x285/0x350 drivers/infiniband/core/ucma.c:1684
 __vfs_write+0x76/0x100 fs/read_write.c:494
 vfs_write+0x262/0x5c0 fs/read_write.c:558
 ksys_write+0x1e8/0x250 fs/read_write.c:611
 do_syscall_64+0xf6/0x790 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x449e49
Code: e8 3c e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 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 0f 83 ab 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3ff7f6eda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000006e0c68 RCX: 0000000000449e49
RDX: 0000000000000010 RSI: 0000000020000100 RDI: 0000000000000004
RBP: 00000000006e0c60 R08: 00007f3ff7f6f700 R09: 0000000000000000
R10: 00007f3ff7f6f700 R11: 0000000000000246 R12: 00000000006e0c6c
R13: 0000000000000000 R14: 0000000000006f6c R15: 20c49ba5e353f7cf
Modules linked in:
---[ end trace 2f97c831759d07ca ]---
RIP: 0010:__list_add_valid.cold+0x3a/0x3c lib/list_debug.c:26
Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 80 18 72 88 e8 c4 e9 c8 fd 0f 0b 48 89 f1 48 c7 c7 00 18 72 88 4c 89 e6 e8 b0 e9 c8 fd <0f> 0b 48 89 ee 48 c7 c7 a0 19 72 88 e8 9f e9 c8 fd 0f 0b 4c 89 ea
RSP: 0018:ffffc90002407c00 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff888097a9f000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815c4e91 RDI: fffff52000480f72
RBP: ffff888097a9f1e0 R08: 0000000000000075 R09: ffffed1015cc6661
R10: ffffed1015cc6660 R11: ffff8880ae633307 R12: ffff888097c8c170
R13: ffff8880a6dda1e0 R14: ffff888097a9f1e0 R15: ffff888097c8c170
FS:  00007f3ff7f6f700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa463b63000 CR3: 00000000a28d8000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400