------------[ cut here ]------------
WARNING: CPU: 0 PID: 3883 at lib/list_debug.c:33 __list_add+0xa0/0xd0 lib/list_debug.c:30()
list_add corruption. prev->next should be next (ffffffff82f4f300), but was           (null). (prev=ffff8800b9c441c8).
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3883 Comm: syz-executor Not tainted 4.1.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffffffff82bd399a ffff8800baca7c38 ffffffff82447d1b 0000000000000032
 ffffffff82b7d49e ffff8800baca7cb8 ffffffff82443f4d 0000000000000000
 ffffffff00000008 ffff8800baca7cc8 ffff8800baca7c68 0000000000000006
Call Trace:
 [<ffffffff82447d1b>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff82447d1b>] dump_stack+0x4c/0x65 lib/dump_stack.c:50
 [<ffffffff82443f4d>] panic+0xcd/0x211 kernel/panic.c:111
 [<ffffffff8116a93b>] warn_slowpath_common+0xbb/0xc0 kernel/panic.c:442
 [<ffffffff8116a981>] warn_slowpath_fmt+0x41/0x50 kernel/panic.c:458
 [<ffffffff8184a380>] __list_add+0xa0/0xd0 lib/list_debug.c:30
 [<ffffffff81e50688>] list_add_tail include/linux/list.h:77 [inline]
 [<ffffffff81e50688>] cma_listen_on_all drivers/infiniband/core/cma.c:1677 [inline]
 [<ffffffff81e50688>] rdma_listen+0x218/0x260 drivers/infiniband/core/cma.c:2573
 [<ffffffff81e603ce>] ucma_listen+0x6e/0x90 drivers/infiniband/core/ucma.c:965
 [<ffffffff81e5f6bd>] ucma_write+0x6d/0xc0 drivers/infiniband/core/ucma.c:1505
 [<ffffffff812eabf3>] __vfs_write+0x23/0xe0 fs/read_write.c:489
 [<ffffffff812eb591>] vfs_write+0xa1/0x1c0 fs/read_write.c:538
 [<ffffffff812ec234>] SYSC_write fs/read_write.c:585 [inline]
 [<ffffffff812ec234>] SyS_write+0x44/0xb0 fs/read_write.c:577
 [<ffffffff82458272>] system_call_fastpath+0x16/0x7a
Kernel Offset: disabled