kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 8158 Comm: syz-executor.3 Not tainted 4.14.287-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
task: ffff88809d2626c0 task.stack: ffff888079e58000
RIP: 0010:rds_ib_get_mr+0x58/0x200 net/rds/ib_rdma.c:543
RSP: 0018:ffff888079e5fc80 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888079e5fd50 RCX: ffff8880a3461c9c
RDX: 000000000000000d RSI: 0000000000000001 RDI: 0000000000000068
RBP: ffff8880ab5fe3c0 R08: 0000000000000001 R09: ffff8880a9fa2e80
R10: ffff8880a9fa2ea7 R11: 0000000000000000 R12: ffff8880a9fa2e80
R13: 0000000000000001 R14: ffff8880a3461c9c R15: 0000000000000000
FS:  00007ff88daa3700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f91fa37dc21 CR3: 00000000aeb30000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __rds_rdma_map+0x5ab/0xea0 net/rds/rdma.c:271
 rds_get_mr+0x89/0xd0 net/rds/rdma.c:333
 rds_setsockopt+0x227/0x750 net/rds/af_rds.c:344
 SYSC_setsockopt net/socket.c:1865 [inline]
 SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7ff88f170109
RSP: 002b:00007ff88daa3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007ff88f283100 RCX: 00007ff88f170109
RDX: 0000000000000002 RSI: 0000000000000114 RDI: 0000000000000005
RBP: 00007ff88f1ca05d R08: 0000000000000020 R09: 0000000000000000
R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd4815c97f R14: 00007ff88daa3300 R15: 0000000000022000
Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 9e 01 00 00 4c 8b bd c0 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7f 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 6e 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 
RIP: rds_ib_get_mr+0x58/0x200 net/rds/ib_rdma.c:543 RSP: ffff888079e5fc80
---[ end trace 5263ae990cc9acf3 ]---
----------------
Code disassembly (best guess):
   0:	fa                   	cli
   1:	48 c1 ea 03          	shr    $0x3,%rdx
   5:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   9:	0f 85 9e 01 00 00    	jne    0x1ad
   f:	4c 8b bd c0 04 00 00 	mov    0x4c0(%rbp),%r15
  16:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1d:	fc ff df
  20:	49 8d 7f 68          	lea    0x68(%r15),%rdi
  24:	48 89 fa             	mov    %rdi,%rdx
  27:	48 c1 ea 03          	shr    $0x3,%rdx
* 2b:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2f:	0f 85 6e 01 00 00    	jne    0x1a3
  35:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3c:	fc ff df
  3f:	4d                   	rex.WRB