netlink: 20 bytes leftover after parsing attributes in process `syz-executor.0'. kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access device bridge245 entered promiscuous mode team0: Port device bridge245 added general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 31440 Comm: syz-executor.1 Not tainted 4.19.133-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:netif_free_tx_queues net/core/dev.c:8568 [inline] RIP: 0010:free_netdev+0x41/0x410 net/core/dev.c:9227 Code: d2 be 0a 24 00 00 48 c7 c7 c0 8b 2a 88 e8 17 2a 92 fb 48 8d bb 00 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 86 03 00 00 48 8b bb 00 04 00 00 e8 39 62 d8 fb RSP: 0000:ffff88820cdd7c28 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000080 RSI: 00000000ffffffff RDI: 0000000000000400 RBP: ffff8880529a2100 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff4 R13: ffff8880529a2510 R14: ffff8880a74e9240 R15: ffff888210a01c88 FS: 00007f2344116700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbd48824db8 CR3: 000000003de0f000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: ip6gre_init_net+0x54b/0x620 net/ipv6/ip6_gre.c:1613 ops_init+0xb3/0x410 net/core/net_namespace.c:129 setup_net+0x2c2/0x720 net/core/net_namespace.c:315 copy_net_ns+0x1f7/0x335 net/core/net_namespace.c:438 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:206 ksys_unshare+0x36c/0x9a0 kernel/fork.c:2530 __do_sys_unshare kernel/fork.c:2598 [inline] __se_sys_unshare kernel/fork.c:2596 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2596 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c1d9 Code: 8d b6 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2344115c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000034280 RCX: 000000000045c1d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 000000000078bfd0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bfac R13: 00007ffe96549d4f R14: 00007f23441169c0 R15: 000000000078bfac Modules linked in: netlink: 20 bytes leftover after parsing attributes in process `syz-executor.0'. ---[ end trace 61ca06689211a35e ]--- RIP: 0010:netif_free_tx_queues net/core/dev.c:8568 [inline] RIP: 0010:free_netdev+0x41/0x410 net/core/dev.c:9227 Code: d2 be 0a 24 00 00 48 c7 c7 c0 8b 2a 88 e8 17 2a 92 fb 48 8d bb 00 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 86 03 00 00 48 8b bb 00 04 00 00 e8 39 62 d8 fb RSP: 0000:ffff88820cdd7c28 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000080 RSI: 00000000ffffffff RDI: 0000000000000400 RBP: ffff8880529a2100 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff4 R13: ffff8880529a2510 R14: ffff8880a74e9240 R15: ffff888210a01c88 FS: 00007f2344116700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9099dcf000 CR3: 000000003de0f000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600