netlink: 'syz-executor.0': attribute type 27 has an invalid length. bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 1 PID: 357 Comm: syz-executor.0 Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:__seqprop_raw_spinlock_sequence include/linux/seqlock.h:283 [inline] RIP: 0010:hrtimer_active kernel/time/hrtimer.c:1614 [inline] RIP: 0010:hrtimer_try_to_cancel+0x81/0x330 kernel/time/hrtimer.c:1331 Code: 00 48 8b 5d c8 48 8b 45 d0 42 80 3c 38 00 74 08 48 89 df e8 21 2a 5c 00 48 8b 03 48 89 45 b0 4c 8d 60 10 4d 89 e5 49 c1 ed 03 <43> 0f b6 44 3d 00 84 c0 0f 85 00 01 00 00 41 8b 1c 24 89 de 83 e6 RSP: 0018:ffffc90002dae538 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff888120076150 RCX: 1ffff1102400ec2b RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888120076120 RBP: ffffc90002dae590 R08: ffffffff840d24d1 R09: 1ffff920005b5cc0 R10: fffff520005b5cc1 R11: fffff520005b5cc1 R12: 0000000000000010 R13: 0000000000000002 R14: ffff888120076120 R15: dffffc0000000000 FS: 00007f2c2131e6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2c2131ed58 CR3: 000000010bc28000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hrtimer_cancel+0x1b/0x60 kernel/time/hrtimer.c:1446 napi_disable+0x1c3/0x210 net/core/dev.c:6459 veth_napi_del_range+0xc3/0x240 drivers/net/veth.c:1116 veth_napi_del drivers/net/veth.c:1136 [inline] veth_set_features+0x1ab/0x230 drivers/net/veth.c:1600 __netdev_update_features+0x732/0x1910 net/core/dev.c:9829 netdev_update_features+0x71/0x1d0 net/core/dev.c:9903 veth_xdp_set drivers/net/veth.c:1701 [inline] veth_xdp+0x579/0x740 drivers/net/veth.c:1714 dev_xdp_install+0x155/0x380 net/core/dev.c:9200 dev_xdp_attach+0xbc9/0xea0 net/core/dev.c:9352 dev_change_xdp_fd+0x1df/0x260 net/core/dev.c:9600 do_setlink+0x3ca6/0x4340 net/core/rtnetlink.c:3138 rtnl_group_changelink net/core/rtnetlink.c:3458 [inline] __rtnl_newlink net/core/rtnetlink.c:3717 [inline] rtnl_newlink+0x10f4/0x2050 net/core/rtnetlink.c:3754 rtnetlink_rcv_msg+0xbb3/0xdd0 net/core/rtnetlink.c:6558 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2545 rtnetlink_rcv+0x20/0x30 net/core/rtnetlink.c:6576 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x90a/0xab0 net/netlink/af_netlink.c:1368 netlink_sendmsg+0xa13/0xd20 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x5a6/0x8a0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x83/0x90 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0xe0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f2c2067cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2c2131e0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f2c2079c050 RCX: 00007f2c2067cae9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00007f2c206c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f2c2079c050 R15: 00007ffc46db5868 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__seqprop_raw_spinlock_sequence include/linux/seqlock.h:283 [inline] RIP: 0010:hrtimer_active kernel/time/hrtimer.c:1614 [inline] RIP: 0010:hrtimer_try_to_cancel+0x81/0x330 kernel/time/hrtimer.c:1331 Code: 00 48 8b 5d c8 48 8b 45 d0 42 80 3c 38 00 74 08 48 89 df e8 21 2a 5c 00 48 8b 03 48 89 45 b0 4c 8d 60 10 4d 89 e5 49 c1 ed 03 <43> 0f b6 44 3d 00 84 c0 0f 85 00 01 00 00 41 8b 1c 24 89 de 83 e6 RSP: 0018:ffffc90002dae538 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff888120076150 RCX: 1ffff1102400ec2b RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888120076120 RBP: ffffc90002dae590 R08: ffffffff840d24d1 R09: 1ffff920005b5cc0 R10: fffff520005b5cc1 R11: fffff520005b5cc1 R12: 0000000000000010 R13: 0000000000000002 R14: ffff888120076120 R15: dffffc0000000000 FS: 00007f2c2131e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020003900 CR3: 000000010bc28000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 48 8b add %cl,-0x75(%rax) 3: 5d pop %rbp 4: c8 48 8b 45 enter $0x8b48,$0x45 8: d0 42 80 rolb -0x80(%rdx) b: 3c 38 cmp $0x38,%al d: 00 74 08 48 add %dh,0x48(%rax,%rcx,1) 11: 89 df mov %ebx,%edi 13: e8 21 2a 5c 00 call 0x5c2a39 18: 48 8b 03 mov (%rbx),%rax 1b: 48 89 45 b0 mov %rax,-0x50(%rbp) 1f: 4c 8d 60 10 lea 0x10(%rax),%r12 23: 4d 89 e5 mov %r12,%r13 26: 49 c1 ed 03 shr $0x3,%r13 * 2a: 43 0f b6 44 3d 00 movzbl 0x0(%r13,%r15,1),%eax <-- trapping instruction 30: 84 c0 test %al,%al 32: 0f 85 00 01 00 00 jne 0x138 38: 41 8b 1c 24 mov (%r12),%ebx 3c: 89 de mov %ebx,%esi 3e: 83 .byte 0x83 3f: e6 .byte 0xe6