netlink: 'syz-executor.1': attribute type 1 has an invalid length. IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_UP): bond38: link is not ready 8021q: adding VLAN 0 to HW filter on device bond38 ================================================================== BUG: KASAN: use-after-free in geneve6_xmit_skb drivers/net/geneve.c:911 [inline] BUG: KASAN: use-after-free in geneve_xmit+0x27d4/0x2e60 drivers/net/geneve.c:940 Read of size 8 at addr ffff88803e870a20 by task syz-executor.2/30431 CPU: 1 PID: 30431 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433 geneve6_xmit_skb drivers/net/geneve.c:911 [inline] geneve_xmit+0x27d4/0x2e60 drivers/net/geneve.c:940 __netdev_start_xmit include/linux/netdevice.h:4349 [inline] netdev_start_xmit include/linux/netdevice.h:4363 [inline] xmit_one net/core/dev.c:3256 [inline] dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 __dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip6_finish_output2+0xde7/0x2290 net/ipv6/ip6_output.c:120 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] mld_sendpack+0x674/0x1060 net/ipv6/mcast.c:1681 mld_send_initial_cr.part.0+0x106/0x150 net/ipv6/mcast.c:2098 mld_send_initial_cr net/ipv6/mcast.c:1196 [inline] mld_dad_timer_expire+0x183/0x5e0 net/ipv6/mcast.c:2117 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:__rcu_read_unlock+0xcc/0x160 kernel/rcu/tree_plugin.h:427 Code: 8c 00 00 00 c7 83 70 03 00 00 00 00 00 80 48 8d bb 74 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 62 8b 83 74 03 00 RSP: 0018:ffff88809db2fa30 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8880987cc280 RCX: ffffc90007677000 RDX: 0000000000000000 RSI: ffffffff81d86cc1 RDI: ffff8880987cc5f4 RBP: ffff8880987cc5f0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880ae237a80 R13: 0000000000000000 R14: ffff8880a3d3ebc0 R15: 0000000000000000 rcu_read_unlock include/linux/rcupdate.h:680 [inline] ext4_get_group_desc+0x1d6/0x4e0 fs/ext4/balloc.c:284 recently_deleted fs/ext4/ialloc.c:680 [inline] find_inode_bit+0x1a0/0x520 fs/ext4/ialloc.c:724 __ext4_new_inode+0x160c/0x5a20 fs/ext4/ialloc.c:916 ext4_mkdir+0x396/0xe10 fs/ext4/namei.c:2696 vfs_mkdir+0x508/0x7a0 fs/namei.c:3819 do_mkdirat+0x262/0x2d0 fs/namei.c:3842 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff87069c409 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:00007ff86f011168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ff8707aef80 RCX: 00007ff87069c409 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'. RDX: 0000000000000000 RSI: 0000000000000010 RDI: 00000000200005c0 RBP: 00007ff8706f7367 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffca85e6d7f R14: 00007ff86f011300 R15: 0000000000022000 Allocated by task 30350: kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 sock_alloc_inode+0x19/0x250 net/socket.c:244 alloc_inode+0x5d/0x180 fs/inode.c:211 new_inode_pseudo+0x14/0xe0 fs/inode.c:911 sock_alloc+0x3c/0x260 net/socket.c:567 __sock_create+0xba/0x740 net/socket.c:1329 udp_sock_create6+0xd1/0x550 net/ipv6/ip6_udp_tunnel.c:22 udp_sock_create include/net/udp_tunnel.h:61 [inline] geneve_create_sock drivers/net/geneve.c:409 [inline] geneve_socket_create drivers/net/geneve.c:524 [inline] geneve_sock_add+0x883/0xee0 drivers/net/geneve.c:610 geneve_open+0x9a/0x1c0 drivers/net/geneve.c:646 __dev_open+0x207/0x3a0 net/core/dev.c:1402 __dev_change_flags+0x501/0x660 net/core/dev.c:7679 dev_change_flags+0x7e/0x140 net/core/dev.c:7748 devinet_ioctl+0x13c9/0x1b40 net/ipv4/devinet.c:1106 inet_ioctl+0x1ea/0x360 net/ipv4/af_inet.c:954 sock_do_ioctl+0xce/0x300 net/socket.c:1015 sock_ioctl+0x2ef/0x5d0 net/socket.c:1135 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 30427: __cache_free mm/slab.c:3503 [inline] kmem_cache_free+0x7f/0x260 mm/slab.c:3765 destroy_inode+0xb9/0x110 fs/inode.c:268 iput_final fs/inode.c:1555 [inline] iput+0x4f1/0x860 fs/inode.c:1581 __sock_release net/socket.c:611 [inline] sock_release+0x174/0x1d0 net/socket.c:619 __geneve_sock_release.part.0+0x15d/0x1e0 drivers/net/geneve.c:558 __geneve_sock_release drivers/net/geneve.c:578 [inline] geneve_sock_release+0x1bf/0x290 drivers/net/geneve.c:576 geneve_stop+0x198/0x200 drivers/net/geneve.c:667 __dev_close_many+0x1ab/0x2e0 net/core/dev.c:1485 __dev_close net/core/dev.c:1497 [inline] __dev_change_flags+0x273/0x660 net/core/dev.c:7677 dev_change_flags+0x7e/0x140 net/core/dev.c:7748 devinet_ioctl+0x13c9/0x1b40 net/ipv4/devinet.c:1106 inet_ioctl+0x1ea/0x360 net/ipv4/af_inet.c:954 sock_do_ioctl+0xce/0x300 net/socket.c:1015 sock_ioctl+0x2ef/0x5d0 net/socket.c:1135 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88803e870a00 which belongs to the cache sock_inode_cache of size 992 The buggy address is located 32 bytes inside of 992-byte region [ffff88803e870a00, ffff88803e870de0) The buggy address belongs to the page: page:ffffea0000fa1c00 count:1 mapcount:0 mapping:ffff8880b59c3240 index:0xffff88803e870ffd flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0002266448 ffffea000139bac8 ffff8880b59c3240 raw: ffff88803e870ffd ffff88803e870100 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88803e870900: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff88803e870980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88803e870a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88803e870a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803e870b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ---------------- Code disassembly (best guess): 0: 8c 00 mov %es,(%rax) 2: 00 00 add %al,(%rax) 4: c7 83 70 03 00 00 00 movl $0x80000000,0x370(%rbx) b: 00 00 80 e: 48 8d bb 74 03 00 00 lea 0x374(%rbx),%rdi 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 89 fa mov %rdi,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx * 2a: 48 89 f8 mov %rdi,%rax <-- trapping instruction 2d: 83 e0 07 and $0x7,%eax 30: 83 c0 03 add $0x3,%eax 33: 38 d0 cmp %dl,%al 35: 7c 04 jl 0x3b 37: 84 d2 test %dl,%dl 39: 75 62 jne 0x9d 3b: 8b .byte 0x8b 3c: 83 .byte 0x83 3d: 74 03 je 0x42