netlink: 'syz-executor.5': attribute type 1 has an invalid length. general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 26328 Comm: syz-executor.5 Not tainted 5.7.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:hlist_add_head_rcu include/linux/rculist.h:538 [inline] RIP: 0010:can_rx_register+0x42c/0x5e0 net/can/af_can.c:476 Code: 24 70 49 89 5f 30 49 8d 5f 38 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 9e 53 75 fa 48 89 2b 4c 89 f3 48 c1 eb 03 <42> 80 3c 2b 00 74 08 4c 89 f7 e8 05 53 75 fa 4d 8b 26 4c 89 f8 48 RSP: 0018:ffffc9001625fd28 EFLAGS: 00010202 RAX: 1ffff11014f6dad9 RBX: 0000000000000001 RCX: 0000000000040000 RDX: 0000000000000000 RSI: 00000000000000a7 RDI: ffff8880a7b6d6c0 RBP: ffff88809744c000 R08: ffffffff873beaa7 R09: fffff52002c4bf9d R10: fffff52002c4bf9d R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000008 R15: ffff8880a7b6d690 FS: 00007f52259f6700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc8df3c1a8 CR3: 000000021ace9000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: raw_enable_filters net/can/raw.c:189 [inline] raw_enable_allfilters net/can/raw.c:255 [inline] raw_bind+0x319/0x1200 net/can/raw.c:428 __sys_bind+0x283/0x360 net/socket.c:1662 __do_sys_bind net/socket.c:1673 [inline] __se_sys_bind net/socket.c:1671 [inline] __x64_sys_bind+0x76/0x80 net/socket.c:1671 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c829 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f52259f5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 00000000004d9500 RCX: 000000000045c829 RDX: 0000000000000080 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000029 R14: 00000000004c9ef3 R15: 00007f52259f66d4 Modules linked in: ---[ end trace d8cd1964a971e011 ]--- RIP: 0010:hlist_add_head_rcu include/linux/rculist.h:538 [inline] RIP: 0010:can_rx_register+0x42c/0x5e0 net/can/af_can.c:476 Code: 24 70 49 89 5f 30 49 8d 5f 38 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 9e 53 75 fa 48 89 2b 4c 89 f3 48 c1 eb 03 <42> 80 3c 2b 00 74 08 4c 89 f7 e8 05 53 75 fa 4d 8b 26 4c 89 f8 48 RSP: 0018:ffffc9001625fd28 EFLAGS: 00010202 RAX: 1ffff11014f6dad9 RBX: 0000000000000001 RCX: 0000000000040000 RDX: 0000000000000000 RSI: 00000000000000a7 RDI: ffff8880a7b6d6c0 RBP: ffff88809744c000 R08: ffffffff873beaa7 R09: fffff52002c4bf9d R10: fffff52002c4bf9d R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000008 R15: ffff8880a7b6d690 FS: 00007f52259f6700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc8df3c1a8 CR3: 000000021ace9000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400