kasan: GPF could be caused by NULL-ptr deref or user memory access
 loop5: unable to read partition table
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 13352 Comm: syz-executor.2 Not tainted 4.14.262-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88808f8544c0 task.stack: ffff888055fd8000
RIP: 0010:dev_put include/linux/netdevice.h:3380 [inline]
RIP: 0010:addr_resolve+0x263/0xa10 drivers/infiniband/core/addr.c:585
RSP: 0018:ffff888055fdf960 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880b2a537a0 RCX: ffffc900066df000
RDX: 00000000000000a8 RSI: ffffffff85465260 RDI: 0000000000000286
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88808f8544c0 R12: 00000000ffffff9d
R13: ffff8880925dfdd0 R14: ffff8880925dfe80 R15: ffff8880b2a53804
FS:  00007f06ef9e3700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc78af1a1b8 CR3: 00000000972c7000 CR4: 00000000003406e0
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_ip+0xf5/0x190 drivers/infiniband/core/ucma.c:693
 ucma_write+0x206/0x2c0 drivers/infiniband/core/ucma.c:1672
IPv6: sit1: Disabled Multicast RS
 __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: 0033:0x7f06f106dfe9
RSP: 002b:00007f06ef9e3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f06f1180f60 RCX: 00007f06f106dfe9
RDX: 0000000000000048 RSI: 0000000020000480 RDI: 0000000000000003
RBP: 00007f06f10c808d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc3c09580f R14: 00007f06ef9e3300 R15: 0000000000022000
Code: 83 c0 03 38 d0 7c 08 84 d2 0f 85 ad 06 00 00 44 89 6b 64 e8 d0 e8 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:3380 [inline] RSP: ffff888055fdf960
RIP: addr_resolve+0x263/0xa10 drivers/infiniband/core/addr.c:585 RSP: ffff888055fdf960
loop5: partition table beyond EOD, truncated
IPv6: sit1: Disabled Multicast RS
---[ end trace 217c683e49556516 ]---
 loop5: p1 p2 < p5 p6 p7 p8 p9 p10 p11 p12 p13 p14 p15 p16 p17 p18 p19 p20 p21 p22 p23 p24 p25 p26 p27 p28 p29 p30 p31 p32 p33 p34 p35 p36 p37 p38 p39 p40 p41 p42 p43 p44 p45 p46 p47 p48 p49 p50 p51 p52 p53 p54 p55 p56 p57 p58 p59 p60 p61 p62 p63 p64 p65 p66 p67 p68 p69 p70 p71 p72 p73 p74 p75 p76 p77 p78 p79 p80 p81 p82 p83 p84 p85 p86 p87 p88 p89 p90 p91 p92 p93 p94 p95 p96 p97 p98 p99 p100 p101 p102 p103 p104 p105 p106 p107 p108 p109 p110 p111 p112 p113 p114 p115 p116 p117 p118 p119 p120 p121 p122 p123 p124 p125 p126 p127 p128 p129 p130 p131 p132 p133 p134 p135 p136 p137 p138 p139 p140 p141 p142 p143 p144 p145 p146 p147 p148 p149 p150 p151 p152 p153 p154 p155 p156 p157 p158 p159 p160 p161 p162 p163 p164 p165 p166 p167 p168 p169 p170 p171 p172 p173 p174 p175 p176 p177 p178 p179 p180 p181 p182 p183 p184 p185 p186 p187 p188 p189 p190 p191 p192 p193 p194 p195 p196 p197 p198 p199 p200 p201 p202 p203 p204 p205 p206 p207 p208 p209 p210 p211 p212 p213 p214 p215 p216 p217 p218 p21
----------------
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 d0 e8 0e fc       	callq  0xfc0ee8e8
  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