kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 3531 Comm: syz-executor3 Not tainted 5.0.0-rc5+ #61
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:cma_bind_listen drivers/infiniband/core/cma.c:3358 [inline]
RIP: 0010:rdma_listen+0x2df/0x8e0 drivers/infiniband/core/cma.c:3472
Code: 8b ac 24 c8 01 00 00 31 f6 48 c7 c7 00 41 1c 89 e8 46 1e fb 01 48 b8 00 00 00 00 00 fc ff df 49 8d 7d 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5a 05 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b
RSP: 0018:ffff88808e44fb00 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000008
RBP: ffff88808e44fb38 R08: 1ffffffff1238820 R09: fffffbfff1238821
kobject: 'loop1' (00000000d43bfec3): kobject_uevent_env
R10: ffff88808e44faf0 R11: ffffffff891c4107 R12: ffff88805da6d1c0
R13: 0000000000000000 R14: 0000000000000400 R15: 0000000000000007
FS:  0000000000000000(0000) GS:ffff8880ae800000(0063) knlGS:00000000f5d5fb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000008460461 CR3: 0000000091948000 CR4: 00000000001406f0
kobject: 'loop1' (00000000d43bfec3): fill_kobj_path: path = '/devices/virtual/block/loop1'
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ucma_listen+0x14d/0x1c0 drivers/infiniband/core/ucma.c:1100
 ucma_write+0x2da/0x3c0 drivers/infiniband/core/ucma.c:1689
 __vfs_write+0x116/0x8e0 fs/read_write.c:485
kobject: 'loop1' (00000000d43bfec3): kobject_uevent_env
kobject: 'loop1' (00000000d43bfec3): fill_kobj_path: path = '/devices/virtual/block/loop1'
 vfs_write+0x20c/0x580 fs/read_write.c:549
 ksys_write+0xea/0x1f0 fs/read_write.c:598
kobject: 'loop4' (00000000f2379e47): kobject_uevent_env
kobject: 'loop4' (00000000f2379e47): fill_kobj_path: path = '/devices/virtual/block/loop4'
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __ia32_sys_write+0x71/0xb0 fs/read_write.c:607
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7fa5869
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5d5f0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000200001c0
RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace f17424a3101c6e77 ]---
RIP: 0010:cma_bind_listen drivers/infiniband/core/cma.c:3358 [inline]
RIP: 0010:rdma_listen+0x2df/0x8e0 drivers/infiniband/core/cma.c:3472
kobject: 'loop0' (0000000073b00585): kobject_uevent_env
Code: 8b ac 24 c8 01 00 00 31 f6 48 c7 c7 00 41 1c 89 e8 46 1e fb 01 48 b8 00 00 00 00 00 fc ff df 49 8d 7d 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5a 05 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b
kobject: 'loop0' (0000000073b00585): fill_kobj_path: path = '/devices/virtual/block/loop0'
RSP: 0018:ffff88808e44fb00 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000008
RBP: ffff88808e44fb38 R08: 1ffffffff1238820 R09: fffffbfff1238821
R10: ffff88808e44faf0 R11: ffffffff891c4107 R12: ffff88805da6d1c0
R13: 0000000000000000 R14: 0000000000000400 R15: 0000000000000007
FS:  0000000000000000(0000) GS:ffff8880ae800000(0063) knlGS:00000000f5d5fb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000000625208 CR3: 0000000091948000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400