------------[ cut here ]------------ WARNING: CPU: 0 PID: 4903 at net/ipv4/route.c:1281 kfree_skb include/linux/skbuff.h:1118 [inline] WARNING: CPU: 0 PID: 4903 at net/ipv4/route.c:1281 ip_rt_bug+0x30/0x100 net/ipv4/route.c:1280 Modules linked in: CPU: 0 PID: 4903 Comm: syz.4.196 Not tainted 5.15.180-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ip_rt_bug+0x30/0x100 include/linux/skbuff.h:1118 lr : kfree_skb include/linux/skbuff.h:1118 [inline] lr : ip_rt_bug+0x30/0x100 net/ipv4/route.c:1280 sp : ffff800008007530 x29: ffff800008007530 x28: 1fffe00018ab27a3 x27: ffff800008007800 x26: dfff800000000000 x25: 1fffe0001a31f923 x24: dfff800000000000 x23: ffff0000d193c400 x22: ffff0000d193c430 x21: ffff0000c5593a80 x20: ffff0000d18fc8c0 x19: ffff0000d18fc8c0 x18: 0000000000000301 x17: 0000000000000000 x16: ffff800011b54788 x15: ffff8000083c0108 x14: ffff8000083c0468 x13: ffff80000ffd04ac x12: 0000000000000003 x11: 0000000000000302 x10: 0000000000000003 x9 : 03f011249e1c2500 x8 : 03f011249e1c2500 x7 : 0000000000000000 x6 : ffff8000083bdc2c x5 : ffff0000dab4f830 x4 : 0000000000000000 x3 : ffff8000136c92c0 x2 : 0000000000000002 x1 : ffff8000121672c0 x0 : 0000000000000001 Call trace: kfree_skb include/linux/skbuff.h:1118 [inline] ip_rt_bug+0x30/0x100 net/ipv4/route.c:1280 dst_output include/net/dst.h:452 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] ip_send_skb+0x134/0x2f8 net/ipv4/ip_output.c:1581 ip_push_pending_frames+0x6c/0x88 net/ipv4/ip_output.c:1601 icmp_push_reply+0x3ac/0x4dc net/ipv4/icmp.c:396 __icmp_send+0xb8c/0x103c net/ipv4/icmp.c:777 ipv4_send_dest_unreach net/ipv4/route.c:1261 [inline] ipv4_link_failure+0x558/0x8d8 net/ipv4/route.c:1268 dst_link_failure include/net/dst.h:422 [inline] arp_error_report+0x11c/0x16c net/ipv4/arp.c:295 neigh_invalidate+0x2c0/0x514 net/core/neighbour.c:1001 neigh_timer_handler+0x630/0xe1c net/core/neighbour.c:1088 call_timer_fn+0x19c/0x8f0 kernel/time/timer.c:1451 expire_timers kernel/time/timer.c:1496 [inline] __run_timers+0x554/0x718 kernel/time/timer.c:1767 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1780 handle_softirqs+0x384/0xdbc kernel/softirq.c:558 __do_softirq kernel/softirq.c:592 [inline] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] invoke_softirq kernel/softirq.c:439 [inline] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641 irq_exit+0x14/0x88 kernel/softirq.c:665 handle_domain_irq+0x14c/0x1fc kernel/irq/irqdesc.c:711 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:765 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:899 do_interrupt_handler+0x74/0x94 arch/arm64/kernel/entry-common.c:267 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:454 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline] lock_acquire+0x280/0x77c kernel/locking/lockdep.c:5626 rcu_lock_acquire+0x40/0x4c include/linux/rcupdate.h:312 rcu_read_lock include/linux/rcupdate.h:739 [inline] inet_twsk_purge+0x10c/0x860 net/ipv4/inet_timewait_sock.c:268 dccp_v4_exit_batch+0x20/0x2c net/dccp/ipv4.c:1040 ops_exit_list net/core/net_namespace.c:177 [inline] setup_net+0x7a0/0xa64 net/core/net_namespace.c:365 copy_net_ns+0x2f8/0x5e0 net/core/net_namespace.c:486 create_new_namespaces+0x330/0x61c kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x108/0x158 kernel/nsproxy.c:226 ksys_unshare+0x424/0x7e4 kernel/fork.c:3099 __do_sys_unshare kernel/fork.c:3173 [inline] __se_sys_unshare kernel/fork.c:3171 [inline] __arm64_sys_unshare+0x3c/0x50 kernel/fork.c:3171 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 22919 hardirqs last enabled at (22918): [] kasan_quarantine_put+0xdc/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (22919): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (22828): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (22828): [] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586 softirqs last disabled at (22837): [] __do_softirq kernel/softirq.c:592 [inline] softirqs last disabled at (22837): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (22837): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (22837): [] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641 ---[ end trace f03db43e2314e01d ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4903 at net/ipv4/route.c:1281 kfree_skb include/linux/skbuff.h:1118 [inline] WARNING: CPU: 0 PID: 4903 at net/ipv4/route.c:1281 ip_rt_bug+0x30/0x100 net/ipv4/route.c:1280 Modules linked in: CPU: 0 PID: 4903 Comm: syz.4.196 Tainted: G W 5.15.180-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ip_rt_bug+0x30/0x100 include/linux/skbuff.h:1118 lr : kfree_skb include/linux/skbuff.h:1118 [inline] lr : ip_rt_bug+0x30/0x100 net/ipv4/route.c:1280 sp : ffff800008007530 x29: ffff800008007530 x28: 1fffe00018ab27a3 x27: ffff800008007800 x26: dfff800000000000 x25: 1fffe00019588f23 x24: dfff800000000000 x23: ffff0000d193c400 x22: ffff0000d193c430 x21: ffff0000c5593a80 x20: ffff0000cac478c0 x19: ffff0000cac478c0 x18: ffff800008007000 x17: 0000000000000000 x16: ffff800011b54788 x15: 0000000000000003 x14: 0000000081c729b2 x13: dfff800000000000 x12: 0000000000000003 x11: 0000000000000302 x10: 0000000000000003 x9 : 03f011249e1c2500 x8 : 03f011249e1c2500 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff800017a2c3b8 x4 : 0000000000000000 x3 : ffff8000136c92c0 x2 : 0000000000000002 x1 : ffff8000121672c0 x0 : 0000000000000001 Call trace: kfree_skb include/linux/skbuff.h:1118 [inline] ip_rt_bug+0x30/0x100 net/ipv4/route.c:1280 dst_output include/net/dst.h:452 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] ip_send_skb+0x134/0x2f8 net/ipv4/ip_output.c:1581 ip_push_pending_frames+0x6c/0x88 net/ipv4/ip_output.c:1601 icmp_push_reply+0x3ac/0x4dc net/ipv4/icmp.c:396 __icmp_send+0xb8c/0x103c net/ipv4/icmp.c:777 ipv4_send_dest_unreach net/ipv4/route.c:1261 [inline] ipv4_link_failure+0x558/0x8d8 net/ipv4/route.c:1268 dst_link_failure include/net/dst.h:422 [inline] arp_error_report+0x11c/0x16c net/ipv4/arp.c:295 neigh_invalidate+0x2c0/0x514 net/core/neighbour.c:1001 neigh_timer_handler+0x630/0xe1c net/core/neighbour.c:1088 call_timer_fn+0x19c/0x8f0 kernel/time/timer.c:1451 expire_timers kernel/time/timer.c:1496 [inline] __run_timers+0x554/0x718 kernel/time/timer.c:1767 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1780 handle_softirqs+0x384/0xdbc kernel/softirq.c:558 __do_softirq kernel/softirq.c:592 [inline] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] invoke_softirq kernel/softirq.c:439 [inline] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641 irq_exit+0x14/0x88 kernel/softirq.c:665 handle_domain_irq+0x14c/0x1fc kernel/irq/irqdesc.c:711 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:765 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:899 do_interrupt_handler+0x74/0x94 arch/arm64/kernel/entry-common.c:267 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:454 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline] lock_acquire+0x280/0x77c kernel/locking/lockdep.c:5626 rcu_lock_acquire+0x40/0x4c include/linux/rcupdate.h:312 rcu_read_lock include/linux/rcupdate.h:739 [inline] inet_twsk_purge+0x10c/0x860 net/ipv4/inet_timewait_sock.c:268 dccp_v4_exit_batch+0x20/0x2c net/dccp/ipv4.c:1040 ops_exit_list net/core/net_namespace.c:177 [inline] setup_net+0x7a0/0xa64 net/core/net_namespace.c:365 copy_net_ns+0x2f8/0x5e0 net/core/net_namespace.c:486 create_new_namespaces+0x330/0x61c kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x108/0x158 kernel/nsproxy.c:226 ksys_unshare+0x424/0x7e4 kernel/fork.c:3099 __do_sys_unshare kernel/fork.c:3173 [inline] __se_sys_unshare kernel/fork.c:3171 [inline] __arm64_sys_unshare+0x3c/0x50 kernel/fork.c:3171 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 23007 hardirqs last enabled at (23006): [] kasan_quarantine_put+0xdc/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (23007): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (22828): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (22828): [] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586 softirqs last disabled at (22837): [] __do_softirq kernel/softirq.c:592 [inline] softirqs last disabled at (22837): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (22837): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (22837): [] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641 ---[ end trace f03db43e2314e01e ]---