print_req_error: I/O error, dev loop5, sector 0
kasan: CONFIG_KASAN_INLINE enabled
EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue
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: 0 PID: 15533 Comm: syz-executor.0 Not tainted 4.14.268-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88804bbd0240 task.stack: ffff888050ed0000
RIP: 0010:dev_put include/linux/netdevice.h:3381 [inline]
RIP: 0010:addr_resolve+0x263/0xa10 drivers/infiniband/core/addr.c:585
RSP: 0018:ffff888050ed7860 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880996a2ee0 RCX: ffffc90005be6000
RDX: 00000000000000a8 RSI: ffffffff85466d20 RDI: 0000000000000286
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88804bbd0240 R12: 00000000ffffff9d
R13: ffff88809c026850 R14: ffff8880b380ba00 R15: ffff8880996a2f44
FS:  00007f88f8fcd700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000af9fa000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rdma_resolve_ip+0x40d/0x6b0 drivers/infiniband/core/addr.c:709
 rdma_resolve_addr+0x2bc/0x23b0 drivers/infiniband/core/cma.c:2940
 ucma_resolve_addr+0x12c/0x1d0 drivers/infiniband/core/ucma.c:719
 ucma_write+0x206/0x2c0 drivers/infiniband/core/ucma.c:1672
 __vfs_write+0xe4/0x630 fs/read_write.c:480
 vfs_write+0x17f/0x4d0 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 fs/read_write.c:582
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f88fa658049
RSP: 002b:00007f88f8fcd168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f88fa76af60 RCX: 00007f88fa658049
RDX: 0000000000000118 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007f88fa6b208d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc20c79f1f R14: 00007f88f8fcd300 R15: 0000000000022000
Code: 83 c0 03 38 d0 7c 08 84 d2 0f 85 ad 06 00 00 44 89 6b 64 e8 00 d5 0e fc 48 8b 54 24 10 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 78 06 00 00 48 8b 85 40 05 00 00 65 ff 08 e8 
RIP: dev_put include/linux/netdevice.h:3381 [inline] RSP: ffff888050ed7860
RIP: addr_resolve+0x263/0xa10 drivers/infiniband/core/addr.c:585 RSP: ffff888050ed7860
---[ end trace 2c038b273faeaaaa ]---
----------------
Code disassembly (best guess):
   0:	83 c0 03             	add    $0x3,%eax
   3:	38 d0                	cmp    %dl,%al
   5:	7c 08                	jl     0xf
   7:	84 d2                	test   %dl,%dl
   9:	0f 85 ad 06 00 00    	jne    0x6bc
   f:	44 89 6b 64          	mov    %r13d,0x64(%rbx)
  13:	e8 00 d5 0e fc       	callq  0xfc0ed518
  18:	48 8b 54 24 10       	mov    0x10(%rsp),%rdx
  1d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  24:	fc ff df
  27:	48 c1 ea 03          	shr    $0x3,%rdx
* 2b:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2f:	0f 85 78 06 00 00    	jne    0x6ad
  35:	48 8b 85 40 05 00 00 	mov    0x540(%rbp),%rax
  3c:	65 ff 08             	decl   %gs:(%rax)
  3f:	e8                   	.byte 0xe8