general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057] CPU: 1 PID: 27345 Comm: syz-executor.0 Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dev_name include/linux/device.h:636 [inline] RIP: 0010:smc_pnet_find_ib net/smc/smc_pnet.c:314 [inline] RIP: 0010:smc_pnet_add_ib net/smc/smc_pnet.c:416 [inline] RIP: 0010:smc_pnet_enter net/smc/smc_pnet.c:515 [inline] RIP: 0010:smc_pnet_add+0xaa1/0x13c0 net/smc/smc_pnet.c:558 Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 17 82 fd f7 4c 8b 3b 49 8d 5f 50 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 f1 81 fd f7 48 8b 1b 48 85 db 74 07 RSP: 0018:ffffc90002c7f400 EFLAGS: 00010206 RAX: 000000000000000a RBX: 0000000000000050 RCX: dffffc0000000000 RDX: ffff88802bdcba00 RSI: 00000000ffffffff RDI: 0000000000000000 RBP: ffffc90002c7f510 R08: ffffffff89d4cf5a R09: fffff5200058fe3d R10: fffff5200058fe3d R11: 0000000000000000 R12: ffff88801b705800 R13: ffff88801b705810 R14: 1ffff110036e0b02 R15: 0000000000000000 FS: 00007f525d5db700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2dd22000 CR3: 000000002f236000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline] genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0x1032/0x1480 net/netlink/genetlink.c:792 netlink_rcv_skb+0x200/0x470 net/netlink/af_netlink.c:2494 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x81a/0x9f0 net/netlink/af_netlink.c:1343 netlink_sendmsg+0xaec/0xe60 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] ____sys_sendmsg+0x5b9/0x910 net/socket.c:2413 ___sys_sendmsg net/socket.c:2467 [inline] __sys_sendmsg+0x280/0x370 net/socket.c:2496 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f525ec66049 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f525d5db168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f525ed78f60 RCX: 00007f525ec66049 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007f525ecc008d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc70aa37cf R14: 00007f525d5db300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dev_name include/linux/device.h:636 [inline] RIP: 0010:smc_pnet_find_ib net/smc/smc_pnet.c:314 [inline] RIP: 0010:smc_pnet_add_ib net/smc/smc_pnet.c:416 [inline] RIP: 0010:smc_pnet_enter net/smc/smc_pnet.c:515 [inline] RIP: 0010:smc_pnet_add+0xaa1/0x13c0 net/smc/smc_pnet.c:558 Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 17 82 fd f7 4c 8b 3b 49 8d 5f 50 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 f1 81 fd f7 48 8b 1b 48 85 db 74 07 RSP: 0018:ffffc90002c7f400 EFLAGS: 00010206 RAX: 000000000000000a RBX: 0000000000000050 RCX: dffffc0000000000 RDX: ffff88802bdcba00 RSI: 00000000ffffffff RDI: 0000000000000000 RBP: ffffc90002c7f510 R08: ffffffff89d4cf5a R09: fffff5200058fe3d R10: fffff5200058fe3d R11: 0000000000000000 R12: ffff88801b705800 R13: ffff88801b705810 R14: 1ffff110036e0b02 R15: 0000000000000000 FS: 00007f525d5db700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8ecb20f718 CR3: 000000002f236000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) 4: 74 08 je 0xe 6: 48 89 df mov %rbx,%rdi 9: e8 17 82 fd f7 callq 0xf7fd8225 e: 4c 8b 3b mov (%rbx),%r15 11: 49 8d 5f 50 lea 0x50(%r15),%rbx 15: 48 89 d8 mov %rbx,%rax 18: 48 c1 e8 03 shr $0x3,%rax 1c: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 23: fc ff df * 26: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2a: 74 08 je 0x34 2c: 48 89 df mov %rbx,%rdi 2f: e8 f1 81 fd f7 callq 0xf7fd8225 34: 48 8b 1b mov (%rbx),%rbx 37: 48 85 db test %rbx,%rbx 3a: 74 07 je 0x43