netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 28338 Comm: syz-executor.4 Not tainted 4.19.35 #3 kobject: 'loop1' (0000000006a77095): kobject_uevent_env Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ip6erspan_set_version+0x5c/0x350 net/ipv6/ip6_gre.c:1747 Code: 07 38 d0 7f 08 84 c0 0f 85 9f 02 00 00 49 8d bc 24 b0 00 00 00 c6 43 54 01 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 9a 02 00 00 4d 8b ac 24 b0 00 00 00 4d 85 ed 0f RSP: 0018:ffff88805bff6fc8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88805920f458 RCX: ffffc9000e6b3000 RDX: 0000000000000016 RSI: ffffffff8610a7a4 RDI: 00000000000000b0 RBP: ffff88805bff6fe0 R08: 1ffff1100b241e8b R09: ffff88805920f458 R10: ffffed100b241e95 R11: ffff88805920f4af R12: 0000000000000000 R13: ffff88806fab8140 R14: ffffffff893ceea0 R15: ffff88805920f458 kobject: 'loop1' (0000000006a77095): fill_kobj_path: path = '/devices/virtual/block/loop1' FS: 00007f89d99f8700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000486460 CR3: 0000000086bc1000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ip6erspan_newlink+0x66/0x7b0 net/ipv6/ip6_gre.c:2237 rtnl_newlink+0x1062/0x1620 net/core/rtnetlink.c:3107 rtnetlink_rcv_msg+0x465/0xb00 net/core/rtnetlink.c:4743 netlink_rcv_skb+0x180/0x460 net/netlink/af_netlink.c:2454 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4761 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x53c/0x720 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:632 ___sys_sendmsg+0x806/0x930 net/socket.c:2115 __sys_sendmsg+0x105/0x1d0 net/socket.c:2153 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2160 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f89d99f7c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000000 RSI: 0000000020001340 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f89d99f86d4 R13: 00000000004c6516 R14: 00000000004dae80 R15: 00000000ffffffff Modules linked in: IPVS: ftp: loaded support on port[0] = 21 ---[ end trace 611893d044ffe20a ]--- kobject: 'loop5' (00000000a8a37f2a): kobject_uevent_env RIP: 0010:ip6erspan_set_version+0x5c/0x350 net/ipv6/ip6_gre.c:1747 Code: 07 38 d0 7f 08 84 c0 0f 85 9f 02 00 00 49 8d bc 24 b0 00 00 00 c6 43 54 01 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 9a 02 00 00 4d 8b ac 24 b0 00 00 00 4d 85 ed 0f kobject: 'loop5' (00000000a8a37f2a): fill_kobj_path: path = '/devices/virtual/block/loop5' RSP: 0018:ffff88805bff6fc8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88805920f458 RCX: ffffc9000e6b3000 RDX: 0000000000000016 RSI: ffffffff8610a7a4 RDI: 00000000000000b0 RBP: ffff88805bff6fe0 R08: 1ffff1100b241e8b R09: ffff88805920f458 R10: ffffed100b241e95 R11: ffff88805920f4af R12: 0000000000000000 R13: ffff88806fab8140 R14: ffffffff893ceea0 R15: ffff88805920f458 FS: 00007f89d99f8700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 kobject: 'loop0' (00000000b2bcd6f0): kobject_uevent_env kobject: 'loop0' (00000000b2bcd6f0): fill_kobj_path: path = '/devices/virtual/block/loop0' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004be314 CR3: 0000000086bc1000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400