netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 netdevsim0 (unregistering): unset [0, 0] type 1 family 0 port 8472 - 0 netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 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: 1338 Comm: kworker/u8:6 Not tainted 6.16.0-syzkaller-06619-gd942fe13f72b #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: netns cleanup_net RIP: 0010:ip6_mc_clear_src+0x18f/0x580 net/ipv6/mcast.c:2593 Code: ff ff ff e8 13 b5 41 01 89 c5 31 ff 89 c6 e8 08 9e 91 f7 85 ed 74 45 e8 bf 99 91 f7 eb 05 e8 b8 99 91 f7 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 92 bc f4 f7 49 8b 2c 24 49 8d 7c RSP: 0018:ffffc900041aedd8 EFLAGS: 00010206 RAX: 000000001fffe000 RBX: 1ffff1100653a202 RCX: ffff888027851e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: 00000000ffff0000 R13: dffffc0000000000 R14: 0000000000000538 R15: ffff8880329d1010 FS: 0000000000000000(0000) GS:ffff888125c80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1739456bd2 CR3: 0000000078eee000 CR4: 00000000003526f0 Call Trace: __ipv6_dev_mc_dec+0x2e4/0x330 net/ipv6/mcast.c:1009 addrconf_leave_solict net/ipv6/addrconf.c:2257 [inline] __ipv6_ifa_notify+0x43d/0xac0 net/ipv6/addrconf.c:6299 addrconf_ifdown+0xe69/0x1880 net/ipv6/addrconf.c:3977 addrconf_notify+0x1bc/0x1010 net/ipv6/addrconf.c:-1 notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline] call_netdevice_notifiers net/core/dev.c:2281 [inline] netif_close_many+0x29c/0x410 net/core/dev.c:1784 unregister_netdevice_many_notify+0x5a7/0x1ff0 net/core/dev.c:12110 unregister_netdevice_many net/core/dev.c:12211 [inline] unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12055 unregister_netdevice include/linux/netdevice.h:3382 [inline] nsim_destroy+0x1dd/0x670 drivers/net/netdevsim/netdev.c:1136 __nsim_dev_port_del+0x14d/0x1b0 drivers/net/netdevsim/dev.c:1473 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1485 [inline] nsim_dev_reload_destroy+0x288/0x490 drivers/net/netdevsim/dev.c:1707 nsim_dev_reload_down+0x8a/0xc0 drivers/net/netdevsim/dev.c:983 devlink_reload+0x1b3/0x8d0 net/devlink/dev.c:461 devlink_pernet_pre_exit+0x1d9/0x3d0 net/devlink/core.c:509 ops_pre_exit_list net/core/net_namespace.c:160 [inline] ops_undo_list+0x184/0x990 net/core/net_namespace.c:233 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:682 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ip6_mc_clear_src+0x18f/0x580 net/ipv6/mcast.c:2593 Code: ff ff ff e8 13 b5 41 01 89 c5 31 ff 89 c6 e8 08 9e 91 f7 85 ed 74 45 e8 bf 99 91 f7 eb 05 e8 b8 99 91 f7 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 92 bc f4 f7 49 8b 2c 24 49 8d 7c RSP: 0018:ffffc900041aedd8 EFLAGS: 00010206 RAX: 000000001fffe000 RBX: 1ffff1100653a202 RCX: ffff888027851e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: 00000000ffff0000 R13: dffffc0000000000 R14: 0000000000000538 R15: ffff8880329d1010 FS: 0000000000000000(0000) GS:ffff888125c80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdc6d4cfdc CR3: 000000000df38000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: e8 13 b5 41 01 call 0x141b518 5: 89 c5 mov %eax,%ebp 7: 31 ff xor %edi,%edi 9: 89 c6 mov %eax,%esi b: e8 08 9e 91 f7 call 0xf7919e18 10: 85 ed test %ebp,%ebp 12: 74 45 je 0x59 14: e8 bf 99 91 f7 call 0xf79199d8 19: eb 05 jmp 0x20 1b: e8 b8 99 91 f7 call 0xf79199d8 20: 4c 89 e0 mov %r12,%rax 23: 48 c1 e8 03 shr $0x3,%rax * 27: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2c: 74 08 je 0x36 2e: 4c 89 e7 mov %r12,%rdi 31: e8 92 bc f4 f7 call 0xf7f4bcc8 36: 49 8b 2c 24 mov (%r12),%rbp 3a: 49 rex.WB 3b: 8d .byte 0x8d 3c: 7c .byte 0x7c