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 BUG: kernel NULL pointer dereference, address: 0000000000000010 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 1110d5067 P4D 1110d5067 PUD 11311c067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 442 Comm: syz-executor.0 Not tainted 5.17.0-rc4-syzkaller #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:276 [inline] RIP: 0010:hrtimer_active kernel/time/hrtimer.c:1611 [inline] RIP: 0010:hrtimer_try_to_cancel+0x12/0xb0 kernel/time/hrtimer.c:1328 Code: 00 e8 72 29 01 00 5b 41 5e 5d c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 48 89 e5 41 57 41 56 41 54 53 48 89 fb 48 8b 43 30 <8b> 48 10 f6 c1 01 74 04 f3 90 eb f4 80 7b 38 00 75 25 48 39 58 18 RSP: 0018:ffffc90000faf088 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88811323d918 RCX: 0000000000000004 RDX: 000000000000000d RSI: 000061100fc019e9 RDI: ffff88811323d918 RBP: ffffc90000faf0a8 R08: ffff8881132210a0 R09: ffffc90000135000 R10: ffffffff829877c0 R11: 0000000000000001 R12: ffff88811323d800 R13: 000061100fc019e9 R14: ffff888113221000 R15: 0000000000000300 FS: 00007f33911496c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 000000011311e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hrtimer_cancel+0xd/0x20 kernel/time/hrtimer.c:1443 napi_disable+0x54/0x60 net/core/dev.c:6286 veth_napi_del_range drivers/net/veth.c:975 [inline] veth_napi_del drivers/net/veth.c:990 [inline] veth_set_features+0x7a/0xe0 drivers/net/veth.c:1418 __netdev_update_features+0x2a7/0x700 net/core/dev.c:9317 netdev_update_features+0x20/0x90 net/core/dev.c:9391 veth_xdp_set drivers/net/veth.c:1509 [inline] veth_xdp+0x197/0x1d0 drivers/net/veth.c:1522 dev_xdp_install+0x65/0xf0 net/core/dev.c:8711 dev_xdp_attach+0x3c6/0x500 net/core/dev.c:8859 dev_change_xdp_fd+0xd3/0x110 net/core/dev.c:9105 do_setlink+0xfcc/0x1050 net/core/rtnetlink.c:2952 rtnl_group_changelink net/core/rtnetlink.c:3265 [inline] __rtnl_newlink net/core/rtnetlink.c:3421 [inline] rtnl_newlink+0x722/0xb90 net/core/rtnetlink.c:3531 rtnetlink_rcv_msg+0x25f/0x430 net/core/rtnetlink.c:5598 netlink_rcv_skb+0xec/0x120 net/netlink/af_netlink.c:2494 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:5616 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x285/0x370 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x387/0x420 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] ____sys_sendmsg+0x181/0x220 net/socket.c:2413 ___sys_sendmsg+0x278/0x2b0 net/socket.c:2467 __sys_sendmsg net/socket.c:2496 [inline] __do_sys_sendmsg net/socket.c:2505 [inline] __se_sys_sendmsg+0xea/0x120 net/socket.c:2503 __x64_sys_sendmsg+0x18/0x20 net/socket.c:2503 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x563e3109cae9 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:00007f33911490c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000563e311bc050 RCX: 0000563e3109cae9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 0000563e310e847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 0000563e311bc050 R15: 00007ffde9b93308 Modules linked in: CR2: 0000000000000010 ---[ end trace 0000000000000000 ]--- RIP: 0010:__seqprop_raw_spinlock_sequence include/linux/seqlock.h:276 [inline] RIP: 0010:hrtimer_active kernel/time/hrtimer.c:1611 [inline] RIP: 0010:hrtimer_try_to_cancel+0x12/0xb0 kernel/time/hrtimer.c:1328 Code: 00 e8 72 29 01 00 5b 41 5e 5d c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 48 89 e5 41 57 41 56 41 54 53 48 89 fb 48 8b 43 30 <8b> 48 10 f6 c1 01 74 04 f3 90 eb f4 80 7b 38 00 75 25 48 39 58 18 RSP: 0018:ffffc90000faf088 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88811323d918 RCX: 0000000000000004 RDX: 000000000000000d RSI: 000061100fc019e9 RDI: ffff88811323d918 RBP: ffffc90000faf0a8 R08: ffff8881132210a0 R09: ffffc90000135000 R10: ffffffff829877c0 R11: 0000000000000001 R12: ffff88811323d800 R13: 000061100fc019e9 R14: ffff888113221000 R15: 0000000000000300 FS: 00007f33911496c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 000000011311e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 e8 add %ch,%al 2: 72 29 jb 0x2d 4: 01 00 add %eax,(%rax) 6: 5b pop %rbx 7: 41 5e pop %r14 9: 5d pop %rbp a: c3 ret b: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 12: 00 00 00 15: 0f 1f 00 nopl (%rax) 18: 55 push %rbp 19: 48 89 e5 mov %rsp,%rbp 1c: 41 57 push %r15 1e: 41 56 push %r14 20: 41 54 push %r12 22: 53 push %rbx 23: 48 89 fb mov %rdi,%rbx 26: 48 8b 43 30 mov 0x30(%rbx),%rax * 2a: 8b 48 10 mov 0x10(%rax),%ecx <-- trapping instruction 2d: f6 c1 01 test $0x1,%cl 30: 74 04 je 0x36 32: f3 90 pause 34: eb f4 jmp 0x2a 36: 80 7b 38 00 cmpb $0x0,0x38(%rbx) 3a: 75 25 jne 0x61 3c: 48 39 58 18 cmp %rbx,0x18(%rax)