hsr_slave_0: left promiscuous mode hsr_slave_1: left promiscuous mode batman_adv: batadv0: Removing interface: batadv_slave_0 batman_adv: batadv0: Removing interface: batadv_slave_1 Oops: general protection fault, probably for non-canonical address 0xdffffc001fffc1ac: 0000 [#1] SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x00000000fffe0d60-0x00000000fffe0d67] CPU: 1 UID: 0 PID: 49 Comm: kworker/u8:3 Not tainted 6.16.0-syzkaller-11743-g6bcdbd62bd56 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: netns cleanup_net RIP: 0010:ip_mc_hash_remove net/ipv4/igmp.c:1431 [inline] RIP: 0010:__ip_mc_dec_group+0x2fd/0x690 net/ipv4/igmp.c:1774 Code: e9 3a bc f7 c6 05 08 ac 89 05 01 48 c7 c7 a0 8d 9e 8c be 97 05 00 00 48 c7 c2 20 8e 9e 8c e8 1a 15 9a f7 4c 89 e3 48 c1 eb 03 <42> 80 3c 2b 00 74 08 4c 89 e7 e8 e4 a3 1f f8 4d 8b 2c 24 4d 39 f5 RSP: 0018:ffffc90000b973d8 EFLAGS: 00010216 RAX: ffffffff8a03708e RBX: 000000001fffc1ac RCX: ffff888021ed0000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff88806a8e1020 R08: ffffffff8f534427 R09: 1ffffffff1ea6884 R10: dffffc0000000000 R11: fffffbfff1ea6885 R12: 00000000fffe0d60 R13: dffffc0000000000 R14: ffff88807bb9c000 R15: 1ffff1100d51c204 FS: 0000000000000000(0000) GS:ffff888125d24000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4a0b328e9c CR3: 0000000056f17000 CR4: 0000000000350ef0 Call Trace: inetdev_event+0x2a7/0x15b0 net/ipv4/devinet.c:1642 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] netif_close_many+0x29c/0x410 net/core/dev.c:1784 unregister_netdevice_many_notify+0x7b9/0x1ff0 net/core/dev.c:12126 unregister_netdevice_many net/core/dev.c:12219 [inline] default_device_exit_batch+0x819/0x890 net/core/dev.c:12723 ops_exit_list net/core/net_namespace.c:204 [inline] ops_undo_list+0x525/0x990 net/core/net_namespace.c:251 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:682 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x711/0x8a0 kernel/kthread.c:463 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:ip_mc_hash_remove net/ipv4/igmp.c:1431 [inline] RIP: 0010:__ip_mc_dec_group+0x2fd/0x690 net/ipv4/igmp.c:1774 Code: e9 3a bc f7 c6 05 08 ac 89 05 01 48 c7 c7 a0 8d 9e 8c be 97 05 00 00 48 c7 c2 20 8e 9e 8c e8 1a 15 9a f7 4c 89 e3 48 c1 eb 03 <42> 80 3c 2b 00 74 08 4c 89 e7 e8 e4 a3 1f f8 4d 8b 2c 24 4d 39 f5 RSP: 0018:ffffc90000b973d8 EFLAGS: 00010216 RAX: ffffffff8a03708e RBX: 000000001fffc1ac RCX: ffff888021ed0000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff88806a8e1020 R08: ffffffff8f534427 R09: 1ffffffff1ea6884 R10: dffffc0000000000 R11: fffffbfff1ea6885 R12: 00000000fffe0d60 R13: dffffc0000000000 R14: ffff88807bb9c000 R15: 1ffff1100d51c204 FS: 0000000000000000(0000) GS:ffff888125c24000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560b6a55a000 CR3: 00000000306e5000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 3a bc f7 c6 05 08 ac cmp -0x53f7fa3a(%rdi,%rsi,8),%bh 7: 89 05 01 48 c7 c7 mov %eax,-0x3838b7ff(%rip) # 0xc7c7480e d: a0 8d 9e 8c be 97 05 movabs 0x597be8c9e8d,%al 14: 00 00 16: 48 c7 c2 20 8e 9e 8c mov $0xffffffff8c9e8e20,%rdx 1d: e8 1a 15 9a f7 call 0xf79a153c 22: 4c 89 e3 mov %r12,%rbx 25: 48 c1 eb 03 shr $0x3,%rbx * 29: 42 80 3c 2b 00 cmpb $0x0,(%rbx,%r13,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 e7 mov %r12,%rdi 33: e8 e4 a3 1f f8 call 0xf81fa41c 38: 4d 8b 2c 24 mov (%r12),%r13 3c: 4d 39 f5 cmp %r14,%r13