general protection fault, probably for non-canonical address 0xdffffc00000000ba: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000005d0-0x00000000000005d7] CPU: 0 PID: 3599 Comm: syz-executor058 Not tainted 5.16.0-rc4-next-20211210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0xd7d/0x54a0 kernel/locking/lockdep.c:4897 Code: 12 0e 41 be 01 00 00 00 0f 86 c8 00 00 00 89 05 99 83 12 0e e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 f3 2f 00 00 48 81 3b 60 54 1a 8f 0f 84 52 f3 ff RSP: 0018:ffffc90001a5f0b0 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 00000000000005d0 RCX: 0000000000000000 RDX: 00000000000000ba RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 000000000008808a R12: 0000000000000000 R13: ffff88801fef9d40 R14: 0000000000000000 R15: 0000000000000001 FS: 00005555561ae300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000440 CR3: 000000007a88b000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5639 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 ref_tracker_alloc+0x17c/0x430 lib/ref_tracker.c:84 netdev_tracker_alloc include/linux/netdevice.h:3860 [inline] ethnl_parse_header_dev_get+0x267/0x780 net/ethtool/netlink.c:145 ethnl_default_parse+0x8d/0x130 net/ethtool/netlink.c:316 ethnl_default_start+0x21f/0x560 net/ethtool/netlink.c:545 genl_start+0x3cc/0x670 net/netlink/genetlink.c:596 __netlink_dump_start+0x584/0x900 net/netlink/af_netlink.c:2361 genl_family_rcv_msg_dumpit+0x1c9/0x310 net/netlink/genetlink.c:689 genl_family_rcv_msg net/netlink/genetlink.c:772 [inline] genl_rcv_msg+0x434/0x580 net/netlink/genetlink.c:792 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2492 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1341 netlink_sendmsg+0x904/0xdf0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd00a282b19 Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd2edea278 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd00a282b19 RDX: 0000000000000000 RSI: 0000000020000780 RDI: 0000000000000003 RBP: 00007fd00a246580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd00a246610 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 54093e60f68f8975 ]--- RIP: 0010:__lock_acquire+0xd7d/0x54a0 kernel/locking/lockdep.c:4897 Code: 12 0e 41 be 01 00 00 00 0f 86 c8 00 00 00 89 05 99 83 12 0e e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 f3 2f 00 00 48 81 3b 60 54 1a 8f 0f 84 52 f3 ff RSP: 0018:ffffc90001a5f0b0 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 00000000000005d0 RCX: 0000000000000000 RDX: 00000000000000ba RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 000000000008808a R12: 0000000000000000 R13: ffff88801fef9d40 R14: 0000000000000000 R15: 0000000000000001 FS: 00005555561ae300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000440 CR3: 000000007a88b000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 12 0e adc (%rsi),%cl 2: 41 be 01 00 00 00 mov $0x1,%r14d 8: 0f 86 c8 00 00 00 jbe 0xd6 e: 89 05 99 83 12 0e mov %eax,0xe128399(%rip) # 0xe1283ad 14: e9 bd 00 00 00 jmpq 0xd6 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 da mov %rbx,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 f3 2f 00 00 jne 0x3027 34: 48 81 3b 60 54 1a 8f cmpq $0xffffffff8f1a5460,(%rbx) 3b: 0f .byte 0xf 3c: 84 52 f3 test %dl,-0xd(%rdx) 3f: ff .byte 0xff