iwpm_register_pid: Unable to send a nlmsg (client = 2) infiniband syz1: RDMA CMA: cma_listen_on_dev, error -98 general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 9685 Comm: syz-executor496 Not tainted 5.6.0-rc3-next-20200228-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:nla_get_u32 include/net/netlink.h:1474 [inline] RIP: 0010:nldev_stat_set_doit+0x5db/0xae0 drivers/infiniband/core/nldev.c:1760 Code: 01 0f 84 26 03 00 00 e8 83 70 dd fb 4c 8b a4 24 20 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2d RSP: 0018:ffffc90001e473c8 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: ffff888094050000 RCX: ffffffff859524eb RDX: 0000000000000000 RSI: ffffffff859524fd RDI: 0000000000000004 RBP: ffff8880a74f8000 R08: ffff88809741a100 R09: ffff888094050010 R10: ffffed101280a1dc R11: ffff888094050ee3 R12: 0000000000000000 R13: ffff8880a47cce40 R14: 0000000000000001 R15: ffff8880a828c0f4 FS: 0000000002450880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001cbdf98 CR3: 0000000095f74000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:195 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x586/0x900 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6b9/0x7d0 net/socket.c:2343 ___sys_sendmsg+0x100/0x170 net/socket.c:2397 __sys_sendmsg+0xec/0x1b0 net/socket.c:2430 do_syscall_64+0xf6/0x790 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4403d9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffd3ee93058 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004403d9 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00000000006ca018 R08: 0000000000000008 R09: 00000000004002c8 R10: 000000000000004a R11: 0000000000000246 R12: 0000000000401c60 R13: 0000000000401cf0 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 83f1a27c6bddbc6d ]--- RIP: 0010:nla_get_u32 include/net/netlink.h:1474 [inline] RIP: 0010:nldev_stat_set_doit+0x5db/0xae0 drivers/infiniband/core/nldev.c:1760 Code: 01 0f 84 26 03 00 00 e8 83 70 dd fb 4c 8b a4 24 20 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2d RSP: 0018:ffffc90001e473c8 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: ffff888094050000 RCX: ffffffff859524eb RDX: 0000000000000000 RSI: ffffffff859524fd RDI: 0000000000000004 RBP: ffff8880a74f8000 R08: ffff88809741a100 R09: ffff888094050010 R10: ffffed101280a1dc R11: ffff888094050ee3 R12: 0000000000000000 R13: ffff8880a47cce40 R14: 0000000000000001 R15: ffff8880a828c0f4 FS: 0000000002450880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 0000000095f74000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400