general protection fault, probably for non-canonical address 0xe00ca8ec8d2e4c52: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x0065676469726290-0x0065676469726297] CPU: 0 PID: 13533 Comm: kworker/u4:7 Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:dst_dev_put+0x9b/0x2b0 net/core/dst.c:157 Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 02 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 08 48 8d 7d 38 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f6 01 00 00 48 8b 6d 38 48 85 ed 74 12 e8 2d ba RSP: 0018:ffffc90000007d50 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff88802bd44000 RCX: 0000000000000100 RDX: 000cacec8d2e4c52 RSI: ffffffff872150de RDI: 0065676469726297 RBP: 006567646972625f R08: 0000000000000000 R09: ffff88802c03e5ab R10: ffffffff87b467b0 R11: 0000000000086089 R12: 6f745f3168746576 R13: 0000607f4606fa20 R14: ffffffff8d6e55a4 R15: ffff88802bd44000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fca518b4000 CR3: 000000000b68e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rt_fibinfo_free_cpus.part.0+0xf5/0x180 net/ipv4/fib_semantics.c:202 rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:194 [inline] fib_nh_common_release+0x10c/0x330 net/ipv4/fib_semantics.c:213 fib_nh_release net/ipv4/fib_semantics.c:225 [inline] free_fib_info_rcu+0x24b/0x4e0 net/ipv4/fib_semantics.c:237 rcu_do_batch kernel/rcu/tree.c:2508 [inline] rcu_core+0x7ab/0x1470 kernel/rcu/tree.c:2743 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__local_bh_enable_ip+0xa8/0x120 kernel/softirq.c:390 Code: 1d dd 8b bb 7e 65 8b 05 d6 8b bb 7e a9 00 ff ff 00 74 45 bf 01 00 00 00 e8 95 31 09 00 e8 00 d1 35 00 fb 65 8b 05 b8 8b bb 7e <85> c0 74 58 5b 5d c3 65 8b 05 06 93 bb 7e 85 c0 75 a2 0f 0b eb 9e RSP: 0018:ffffc90004b5f780 EFLAGS: 00000206 RAX: 0000000080000000 RBX: 00000000fffffe01 RCX: 1ffffffff1fa1e72 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffff8761aaf3 R08: 0000000000000001 R09: ffffffff8fd02947 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8b66ec40 R13: 0000000000005a81 R14: 0000000000000000 R15: 0000000000000001 local_bh_enable include/linux/bottom_half.h:32 [inline] get_next_corpse net/netfilter/nf_conntrack_core.c:2252 [inline] nf_ct_iterate_cleanup+0x15a/0x450 net/netfilter/nf_conntrack_core.c:2275 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2363 [inline] nf_ct_iterate_cleanup_net+0x236/0x400 net/netfilter/nf_conntrack_core.c:2347 masq_device_event+0xae/0xe0 net/netfilter/nf_nat_masquerade.c:88 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1996 call_netdevice_notifiers_extack net/core/dev.c:2008 [inline] call_netdevice_notifiers net/core/dev.c:2022 [inline] dev_close_many+0x2ff/0x620 net/core/dev.c:1597 unregister_netdevice_many+0x3ff/0x1790 net/core/dev.c:11018 default_device_exit_batch+0x2fa/0x3c0 net/core/dev.c:11571 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:171 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:591 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace 3c9bb49e8bfca7f2 ]--- RIP: 0010:dst_dev_put+0x9b/0x2b0 net/core/dst.c:157 Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 02 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 08 48 8d 7d 38 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f6 01 00 00 48 8b 6d 38 48 85 ed 74 12 e8 2d ba RSP: 0018:ffffc90000007d50 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff88802bd44000 RCX: 0000000000000100 RDX: 000cacec8d2e4c52 RSI: ffffffff872150de RDI: 0065676469726297 RBP: 006567646972625f R08: 0000000000000000 R09: ffff88802c03e5ab R10: ffffffff87b467b0 R11: 0000000000086089 R12: 6f745f3168746576 R13: 0000607f4606fa20 R14: ffffffff8d6e55a4 R15: ffff88802bd44000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fca518b4000 CR3: 000000000b68e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 48 c1 ea 03 shr $0x3,%rdx 4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 8: 0f 85 02 02 00 00 jne 0x210 e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 15: fc ff df 18: 48 8b 6b 08 mov 0x8(%rbx),%rbp 1c: 48 8d 7d 38 lea 0x38(%rbp),%rdi 20: 48 89 fa mov %rdi,%rdx 23: 48 c1 ea 03 shr $0x3,%rdx * 27: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2b: 0f 85 f6 01 00 00 jne 0x227 31: 48 8b 6d 38 mov 0x38(%rbp),%rbp 35: 48 85 ed test %rbp,%rbp 38: 74 12 je 0x4c 3a: e8 .byte 0xe8 3b: 2d .byte 0x2d 3c: ba .byte 0xba