Oops: general protection fault, probably for non-canonical address 0xdffffc001fffe000: 0000 [#1] SMP KASAN PTI KASAN: probably user-memory-access in range [0x00000000ffff0000-0x00000000ffff0007] CPU: 0 UID: 0 PID: 18447 Comm: syz.7.3287 Not tainted 6.17.0-rc1-syzkaller-00215-gbab3ce404553 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:fib_table_flush+0x29f/0x11a0 net/ipv4/fib_trie.c:2038 Code: 44 89 e7 44 89 f6 e8 e0 75 b7 f7 45 38 f4 76 6e e8 56 75 b7 f7 48 89 df e8 be d1 ff ff eb 64 4d 8d 75 05 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 28 0d 00 00 45 0f b6 36 31 ff 44 89 f6 RSP: 0018:ffffc90003ffe7a0 EFLAGS: 00010207 RAX: 000000001fffe000 RBX: ffff888055a3f020 RCX: 0000000000080000 RDX: ffffc900163f9000 RSI: 0000000000001763 RDI: 0000000000001764 RBP: ffffc90003ffe978 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6 R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: dffffc0000000000 R13: 00000000ffff0000 R14: 00000000ffff0005 R15: 0000000000000001 FS: 00007ff41e2cd6c0(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7c06814d90 CR3: 0000000032ddc000 CR4: 00000000003526f0 Call Trace: fib_flush net/ipv4/fib_frontend.c:195 [inline] fib_disable_ip+0xfd/0x170 net/ipv4/fib_frontend.c:1455 fib_netdev_event+0x318/0x490 net/ipv4/fib_frontend.c:-1 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline] call_netdevice_notifiers net/core/dev.c:2281 [inline] __dev_notify_flags+0x18d/0x2e0 net/core/dev.c:-1 netif_change_flags+0xe8/0x1a0 net/core/dev.c:9605 do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3143 rtnl_changelink net/core/rtnetlink.c:3761 [inline] __rtnl_newlink net/core/rtnetlink.c:3920 [inline] rtnl_newlink+0x160b/0x1c70 net/core/rtnetlink.c:4057 rtnetlink_rcv_msg+0x7cc/0xb70 net/core/rtnetlink.c:6946 netlink_rcv_skb+0x205/0x470 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:729 ____sys_sendmsg+0x505/0x830 net/socket.c:2614 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668 __sys_sendmsg net/socket.c:2700 [inline] __do_sys_sendmsg net/socket.c:2705 [inline] __se_sys_sendmsg net/socket.c:2703 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2703 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff41d38ebe9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff41e2cd038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff41d5b5fa0 RCX: 00007ff41d38ebe9 RDX: 0000000024008000 RSI: 0000200000000280 RDI: 000000000000000a RBP: 00007ff41d411e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff41d5b6038 R14: 00007ff41d5b5fa0 R15: 00007ffdb55ccc88 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:fib_table_flush+0x29f/0x11a0 net/ipv4/fib_trie.c:2038 Code: 44 89 e7 44 89 f6 e8 e0 75 b7 f7 45 38 f4 76 6e e8 56 75 b7 f7 48 89 df e8 be d1 ff ff eb 64 4d 8d 75 05 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 28 0d 00 00 45 0f b6 36 31 ff 44 89 f6 RSP: 0018:ffffc90003ffe7a0 EFLAGS: 00010207 RAX: 000000001fffe000 RBX: ffff888055a3f020 RCX: 0000000000080000 RDX: ffffc900163f9000 RSI: 0000000000001763 RDI: 0000000000001764 RBP: ffffc90003ffe978 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6 R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: dffffc0000000000 R13: 00000000ffff0000 R14: 00000000ffff0005 R15: 0000000000000001 FS: 00007ff41e2cd6c0(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f53100e7d60 CR3: 0000000032ddc000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 44 89 e7 mov %r12d,%edi 3: 44 89 f6 mov %r14d,%esi 6: e8 e0 75 b7 f7 call 0xf7b775eb b: 45 38 f4 cmp %r14b,%r12b e: 76 6e jbe 0x7e 10: e8 56 75 b7 f7 call 0xf7b7756b 15: 48 89 df mov %rbx,%rdi 18: e8 be d1 ff ff call 0xffffd1db 1d: eb 64 jmp 0x83 1f: 4d 8d 75 05 lea 0x5(%r13),%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 28 0d 00 00 jne 0xd5f 37: 45 0f b6 36 movzbl (%r14),%r14d 3b: 31 ff xor %edi,%edi 3d: 44 89 f6 mov %r14d,%esi