IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 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: 7524 Comm: syz-executor.1 Not tainted 6.1.43-syzkaller-00013-gfb91717581d1 #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:274 [inline] RIP: 0010:hrtimer_active kernel/time/hrtimer.c:1611 [inline] RIP: 0010:hrtimer_try_to_cancel+0x7d/0x320 kernel/time/hrtimer.c:1328 Code: 00 48 8b 5d c8 48 8b 45 d0 42 80 3c 38 00 74 08 48 89 df e8 45 fd 54 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:ffffc9000b31e6d0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff88810d374148 RCX: 1ffff11021a6e82a RDX: ffffc90001d69000 RSI: 000000000001f4b7 RDI: 000000000001f4b8 RBP: ffffc9000b31e728 R08: ffffffff8405f41f R09: ffffed1021a6e803 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000010 R13: 0000000000000002 R14: ffff88810d374118 R15: dffffc0000000000 FS: 00007fb8029dc6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556aa3818 CR3: 000000015ebdd000 CR4: 00000000003506a0 Call Trace: <TASK> hrtimer_cancel+0x17/0x50 kernel/time/hrtimer.c:1443 napi_disable+0xe8/0x110 net/core/dev.c:6437 veth_napi_del_range drivers/net/veth.c:1039 [inline] veth_napi_del drivers/net/veth.c:1054 [inline] veth_set_features+0x1c8/0x300 drivers/net/veth.c:1482 __netdev_update_features+0x865/0x1c40 net/core/dev.c:9733 netdev_update_features+0x6d/0x1c0 net/core/dev.c:9807 veth_xdp_set drivers/net/veth.c:1578 [inline] veth_xdp+0x4fa/0x6b0 drivers/net/veth.c:1591 dev_xdp_install+0x151/0x380 net/core/dev.c:9127 dev_xdp_attach+0xb52/0xdc0 net/core/dev.c:9275 dev_change_xdp_fd+0x1db/0x260 net/core/dev.c:9521 do_setlink+0x3877/0x3e90 net/core/rtnetlink.c:3008 rtnl_group_changelink net/core/rtnetlink.c:3315 [inline] __rtnl_newlink net/core/rtnetlink.c:3569 [inline] rtnl_newlink+0x1077/0x1f80 net/core/rtnetlink.c:3606 rtnetlink_rcv_msg+0x9a5/0xca0 net/core/rtnetlink.c:6103 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2525 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6121 netlink_unicast_kernel net/netlink/af_netlink.c:1328 [inline] netlink_unicast+0x8ee/0xad0 net/netlink/af_netlink.c:1354 netlink_sendmsg+0xa15/0xd30 net/netlink/af_netlink.c:1903 sock_sendmsg_nosec net/socket.c:716 [inline] sock_sendmsg net/socket.c:736 [inline] ____sys_sendmsg+0x5dc/0x9d0 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [inline] __sys_sendmsg+0x2a9/0x390 net/socket.c:2565 __do_sys_sendmsg net/socket.c:2574 [inline] __se_sys_sendmsg net/socket.c:2572 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2572 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb801c7cae9 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:00007fb8029dc0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fb801d9bf80 RCX: 00007fb801c7cae9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007fb801cc847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fb801d9bf80 R15: 00007ffde4907f08 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__seqprop_raw_spinlock_sequence include/linux/seqlock.h:274 [inline] RIP: 0010:hrtimer_active kernel/time/hrtimer.c:1611 [inline] RIP: 0010:hrtimer_try_to_cancel+0x7d/0x320 kernel/time/hrtimer.c:1328 Code: 00 48 8b 5d c8 48 8b 45 d0 42 80 3c 38 00 74 08 48 89 df e8 45 fd 54 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:ffffc9000b31e6d0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff88810d374148 RCX: 1ffff11021a6e82a RDX: ffffc90001d69000 RSI: 000000000001f4b7 RDI: 000000000001f4b8 RBP: ffffc9000b31e728 R08: ffffffff8405f41f R09: ffffed1021a6e803 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000010 R13: 0000000000000002 R14: ffff88810d374118 R15: dffffc0000000000 FS: 00007fb8029dc6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbe588d7963 CR3: 000000015ebdd000 CR4: 00000000003506b0 ---------------- 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 45 fd 54 00 call 0x54fd5d 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