RDX: 0000000000000038 RSI: 0000000000728020 RDI: 00000000000000f9 RBP: 0000000000000003 R08: 00000000000003b8 R09: 0000000000004000 R10: 000000000070b660 R11: 0000000000000246 R12: 000000000000001b R13: 000000000002bb1a R14: 0000000000000081 R15: 0000000000000005 CPU: 0 PID: 11933 Comm: syz-executor0 Not tainted 4.20.0-rc1+ #145 rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 rcu: (detected by 1, t=10633 jiffies, g=22005, q=4) Call Trace: rcu: All QSes seen, last rcu_preempt kthread activity 10486 (4294970089-4294959603), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor5 R running task 6872 6171 1 0x8000000e __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 Call Trace: warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3423 sched_show_task.cold.84+0x2b6/0x30a kernel/sched/core.c:5293 __alloc_pages_slowpath+0x26e8/0x2e10 mm/page_alloc.c:4302 print_other_cpu_stall.cold.66+0x7dd/0x8bb kernel/rcu/tree.c:1286 check_cpu_stall kernel/rcu/tree.c:1415 [inline] rcu_pending kernel/rcu/tree.c:2961 [inline] rcu_check_callbacks+0xfd7/0x13f0 kernel/rcu/tree.c:2506 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4395 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] kmem_getpages mm/slab.c:1409 [inline] cache_grow_begin+0xa5/0x8c0 mm/slab.c:2677 fallback_alloc+0x204/0x2e0 mm/slab.c:3219 ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0xe3/0x730 mm/slab.c:3642 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 update_process_times+0x2d/0x70 kernel/time/timer.c:1636 alloc_skb include/linux/skbuff.h:997 [inline] ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 addrconf_rs_timer+0x314/0x690 net/ipv6/addrconf.c:3836 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:slab_alloc_node mm/slab.c:3329 [inline] RIP: 0010:kmem_cache_alloc_node+0x247/0x730 mm/slab.c:3642 Code: 3f 7e 0f 85 32 ff ff ff e8 05 1c 3e ff e9 28 ff ff ff e8 6c 51 c3 ff 48 83 3d 84 9a 8f 07 00 0f 84 33 01 00 00 4c 89 ff 57 9d <0f> 1f 44 00 00 e9 bf fe ff ff 31 d2 be a5 01 00 00 48 c7 c7 92 b7 RSP: 0018:ffff8801daf07450 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 1ffff100330c196e RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff8801daf074c0 R08: ffff88019860cb70 R09: 0000000000000002 R10: 0000000000000000 R11: ffff88019860c280 R12: ffff8801d9beec00 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 R13: ffff8801d9beec00 R14: 0000000000000000 R15: 0000000000000286 __do_softirq+0x308/0xb7e kernel/softirq.c:292 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 addrconf_rs_timer+0x314/0x690 net/ipv6/addrconf.c:3836 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:slab_alloc_node mm/slab.c:3329 [inline] RIP: 0010:kmem_cache_alloc_node_trace+0x249/0x740 mm/slab.c:3661 Code: 3f 7e 0f 85 32 ff ff ff e8 93 e7 3d ff e9 28 ff ff ff e8 fa 1c c3 ff 48 83 3d 12 66 8f 07 00 0f 84 33 01 00 00 4c 89 ff 57 9d <0f> 1f 44 00 00 e9 c1 fe ff ff 31 d2 be a5 01 00 00 48 c7 c7 92 b7 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 RSP: 0000:ffff88019aa57498 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8801ce5fec40 RDI: 0000000000000286 RBP: ffff88019aa57510 R08: ffff8801ce5fe3c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801da800c40 R13: ffff8801da800c40 R14: 0000000000000000 R15: 0000000000000286 __do_kmalloc_node mm/slab.c:3683 [inline] __kmalloc_node_track_caller+0x3c/0x70 mm/slab.c:3698 __kmalloc_reserve.isra.40+0xcc/0xe0 net/core/skbuff.c:145 pskb_expand_head+0x230/0x10f0 net/core/skbuff.c:1460 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 skb_ensure_writable+0x3dd/0x640 net/core/skbuff.c:5073 __bpf_try_make_writable net/core/filter.c:1638 [inline] bpf_try_make_writable net/core/filter.c:1644 [inline] bpf_try_make_head_writable net/core/filter.c:1652 [inline] ____bpf_clone_redirect net/core/filter.c:2089 [inline] bpf_clone_redirect+0x14a/0x490 net/core/filter.c:2067 bpf_prog_bebbfe2050753572+0x41e/0x1000 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:771 [inline] RIP: 0010:preempt_schedule_irq+0xaf/0x140 kernel/sched/core.c:3698 Code: 00 e8 d5 b2 7b f9 e8 00 98 ab f9 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 75 73 48 83 3d 1a e1 77 01 00 74 61 fb 66 0f 1f 44 00 00 01 00 00 00 e8 f7 cd ff ff 41 80 7d 00 00 75 6c 48 83 3d f0 e0 RSP: 0018:ffff880198615410 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff12a3f78 RBX: 0000000000000000 RCX: 1ffff100330c1969 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88019860cafc RBP: ffff880198615438 R08: ffff88019860cb48 R09: 0000000000000006 R10: 0000000000000000 R11: ffff88019860c280 R12: dffffc0000000000 R13: fffffbfff12a3f77 R14: ffffffff8951fbc0 R15: ffffffff8951fbb8 retint_kernel+0x1b/0x2d RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:dump_stack+0x358/0x39d lib/dump_stack.c:118 Code: 74 0c 48 c7 c7 b0 fb 51 89 e8 51 94 ef f9 48 83 3d 89 b6 7e 01 00 0f 84 63 fe ff ff e8 7e 45 ac f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 6b 45 ac f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 RSP: 0018:ffff8801986154f0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff02 RAX: ffff88019860c280 RBX: 1ffffffff12a3f76 RCX: 1ffff100330c1969 RDX: 0000000000000000 RSI: ffffffff87d34532 RDI: 0000000000000293 RBP: ffff880198615598 R08: ffff88019860cb48 R09: 0000000000000006 R10: 0000000000000000 R11: ffff88019860c280 R12: 1ffff100330c2aa6 R13: 00000000ffffffff R14: 0000000000000200 R15: 0000000000000001 dump_header+0x27b/0xf72 mm/oom_kill.c:441 warn_alloc_show_mem: 1 callbacks suppressed Mem-Info: active_anon:59915 inactive_anon:187 isolated_anon:0 active_file:12 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:9466 slab_unreclaimable:1452955 mapped:16403 shmem:244 pagetables:476 bounce:0 free:13733 free_pcp:586 free_cma:0 Node 0 active_anon:239660kB inactive_anon:748kB active_file:48kB inactive_file:52kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:65612kB dirty:0kB writeback:0kB shmem:976kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 145408kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Node 0 DMA free:15908kB min:164kB low:204kB high:244kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 2818 6321 6321 Node 0 DMA32 free:25084kB min:30052kB low:37564kB high:45076kB active_anon:4096kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2888776kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:248kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:13940kB min:37364kB low:46704kB high:56044kB active_anon:235564kB inactive_anon:748kB active_file:48kB inactive_file:52kB unevictable:0kB writepending:0kB present:4718592kB managed:3587820kB mlocked:0kB kernel_stack:6752kB pagetables:1904kB bounce:0kB free_pcp:2096kB local_pcp:592kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB Node 0 DMA32: 5*4kB (UM) 1*8kB (M) 2*16kB (UM) 4*32kB (UM) 3*64kB (M) 3*128kB (UM) 3*256kB (UM) 2*512kB (M) 4*1024kB (UM) 3*2048kB (UM) 3*4096kB (M) = 25084kB Node 0 Normal: 2293*4kB (UMEH) 342*8kB (ME) 71*16kB (ME) 22*32kB (ME) 3*64kB (M) 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13940kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 269 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 1965979 pages RAM 0 pages HighMem/MovableOnly 342853 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb syz-executor0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-executor0 cpuset=syz0 mems_allowed=0 oom_kill_process.cold.27+0x10/0x903 mm/oom_kill.c:953 CPU: 0 PID: 11933 Comm: syz-executor0 Not tainted 4.20.0-rc1+ #145 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3423 __alloc_pages_slowpath+0x26e8/0x2e10 mm/page_alloc.c:4302 out_of_memory+0xa84/0x1430 mm/oom_kill.c:1120 __alloc_pages_may_oom mm/page_alloc.c:3519 [inline] __alloc_pages_slowpath+0x2354/0x2e10 mm/page_alloc.c:4240 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4395 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4395 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] kmem_getpages mm/slab.c:1409 [inline] cache_grow_begin+0xa5/0x8c0 mm/slab.c:2677 fallback_alloc+0x204/0x2e0 mm/slab.c:3219 ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] kmem_getpages mm/slab.c:1409 [inline] cache_grow_begin+0xa5/0x8c0 mm/slab.c:2677 slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0xe3/0x730 mm/slab.c:3642 fallback_alloc+0x204/0x2e0 mm/slab.c:3219 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0xe3/0x730 mm/slab.c:3642 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669 alloc_skb include/linux/skbuff.h:997 [inline] nlmsg_new include/net/netlink.h:654 [inline] rtmsg_ifinfo_build_skb+0x74/0x190 net/core/rtnetlink.c:3396 addrconf_rs_timer+0x314/0x690 net/ipv6/addrconf.c:3836 rtmsg_ifinfo_event.part.31+0x45/0xe0 net/core/rtnetlink.c:3432 rtmsg_ifinfo_event net/core/rtnetlink.c:3443 [inline] rtmsg_ifinfo+0x8c/0xa0 net/core/rtnetlink.c:3441 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 dev_close_many+0x3be/0x860 net/core/dev.c:1502 rollback_registered_many+0x543/0x1250 net/core/dev.c:7979 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 rollback_registered+0x1e9/0x420 net/core/dev.c:8044 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 unregister_netdevice_queue+0x321/0x5e0 net/core/dev.c:9088 unregister_netdevice include/linux/netdevice.h:2625 [inline] __tun_detach+0x11b8/0x15c0 drivers/net/tun.c:723 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 tun_detach drivers/net/tun.c:740 [inline] tun_chr_close+0xe3/0x180 drivers/net/tun.c:3376 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 __fput+0x385/0xa30 fs/file_table.c:278 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:slab_alloc_node mm/slab.c:3329 [inline] RIP: 0010:kmem_cache_alloc_node_trace+0x249/0x740 mm/slab.c:3661 Code: 3f 7e 0f 85 32 ff ff ff e8 93 e7 3d ff e9 28 ff ff ff e8 fa 1c c3 ff 48 83 3d 12 66 8f 07 00 0f 84 33 01 00 00 4c 89 ff 57 9d <0f> 1f 44 00 00 e9 c1 fe ff ff 31 d2 be a5 01 00 00 48 c7 c7 92 b7 ____fput+0x15/0x20 fs/file_table.c:309 RSP: 0000:ffff88019aa57498 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8801ce5fec40 RDI: 0000000000000286 RBP: ffff88019aa57510 R08: ffff8801ce5fe3c0 R09: 0000000000000000 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1ad6/0x26d0 kernel/exit.c:867 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801da800c40 R13: ffff8801da800c40 R14: 0000000000000000 R15: 0000000000000286 __do_kmalloc_node mm/slab.c:3683 [inline] __kmalloc_node_track_caller+0x3c/0x70 mm/slab.c:3698 __kmalloc_reserve.isra.40+0xcc/0xe0 net/core/skbuff.c:145 pskb_expand_head+0x230/0x10f0 net/core/skbuff.c:1460 skb_ensure_writable+0x3dd/0x640 net/core/skbuff.c:5073 __bpf_try_make_writable net/core/filter.c:1638 [inline] bpf_try_make_writable net/core/filter.c:1644 [inline] bpf_try_make_head_writable net/core/filter.c:1652 [inline] ____bpf_clone_redirect net/core/filter.c:2089 [inline] bpf_clone_redirect+0x14a/0x490 net/core/filter.c:2067 bpf_prog_bebbfe2050753572+0x41e/0x1000 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8b0/0x1980 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410fa0 Code: Bad RIP value. RSP: 002b:00007fffdb160f18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000410fa0 RDX: 0000000000000038 RSI: 0000000000728020 RDI: 00000000000000f9 RBP: 0000000000000003 R08: 00000000000003b8 R09: 0000000000004000 R10: 000000000070b660 R11: 0000000000000246 R12: 000000000000001b ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb R13: 000000000002bb1a R14: 0000000000000081 R15: 0000000000000005 rcu: rcu_preempt kthread starved for 10486 jiffies! g22005 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 syz-executor0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) rcu: RCU grace-period kthread stack dump: syz-executor0 cpuset=syz0 mems_allowed=0 rcu_preempt R running task 22696 10 2 0x80000000 CPU: 0 PID: 11933 Comm: syz-executor0 Not tainted 4.20.0-rc1+ #145 Call Trace: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3423 __alloc_pages_slowpath+0x26e8/0x2e10 mm/page_alloc.c:4302 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_timeout+0x140/0x260 kernel/time/timer.c:1804 rcu_gp_fqs_loop+0x762/0xa80 kernel/rcu/tree.c:1934 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4395 rcu_gp_kthread+0x341/0xc70 kernel/rcu/tree.c:2090 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] kmem_getpages mm/slab.c:1409 [inline] cache_grow_begin+0xa5/0x8c0 mm/slab.c:2677 fallback_alloc+0x204/0x2e0 mm/slab.c:3219 ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0xe3/0x730 mm/slab.c:3642 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x314/0x690 net/ipv6/addrconf.c:3836 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 syz-executor5: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-executor5 cpuset=syz5 mems_allowed=0 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:slab_alloc_node mm/slab.c:3329 [inline] RIP: 0010:kmem_cache_alloc_node_trace+0x249/0x740 mm/slab.c:3661 Code: 3f 7e 0f 85 32 ff ff ff e8 93 e7 3d ff e9 28 ff ff ff e8 fa 1c c3 ff 48 83 3d 12 66 8f 07 00 0f 84 33 01 00 00 4c 89 ff 57 9d <0f> 1f 44 00 00 e9 c1 fe ff ff 31 d2 be a5 01 00 00 48 c7 c7 92 b7 RSP: 0000:ffff88019aa57498 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8801ce5fec40 RDI: 0000000000000286 RBP: ffff88019aa57510 R08: ffff8801ce5fe3c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801da800c40 R13: ffff8801da800c40 R14: 0000000000000000 R15: 0000000000000286 __do_kmalloc_node mm/slab.c:3683 [inline] __kmalloc_node_track_caller+0x3c/0x70 mm/slab.c:3698 __kmalloc_reserve.isra.40+0xcc/0xe0 net/core/skbuff.c:145 pskb_expand_head+0x230/0x10f0 net/core/skbuff.c:1460 skb_ensure_writable+0x3dd/0x640 net/core/skbuff.c:5073 __bpf_try_make_writable net/core/filter.c:1638 [inline] bpf_try_make_writable net/core/filter.c:1644 [inline] bpf_try_make_head_writable net/core/filter.c:1652 [inline] ____bpf_clone_redirect net/core/filter.c:2089 [inline] bpf_clone_redirect+0x14a/0x490 net/core/filter.c:2067 bpf_prog_bebbfe2050753572+0x41e/0x1000 CPU: 1 PID: 6171 Comm: syz-executor5 Not tainted 4.20.0-rc1+ #145 warn_alloc_show_mem: 1 callbacks suppressed Mem-Info: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 active_anon:59915 inactive_anon:187 isolated_anon:0 active_file:12 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:9466 slab_unreclaimable:1452955 mapped:16403 shmem:244 pagetables:476 bounce:0 free:13733 free_pcp:586 free_cma:0 Call Trace: Node 0 active_anon:239660kB inactive_anon:748kB active_file:48kB inactive_file:52kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:65612kB dirty:0kB writeback:0kB shmem:976kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 145408kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Node 0 DMA free:15908kB min:164kB low:204kB high:244kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 lowmem_reserve[]: 0 2818 6321 6321 Node 0 DMA32 free:25084kB min:30052kB low:37564kB high:45076kB active_anon:4096kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2888776kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:248kB local_pcp:0kB free_cma:0kB warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3423 lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:13940kB min:37364kB low:46704kB high:56044kB active_anon:235564kB inactive_anon:748kB active_file:48kB inactive_file:52kB unevictable:0kB writepending:0kB present:4718592kB managed:3587820kB mlocked:0kB kernel_stack:6752kB pagetables:1904kB bounce:0kB free_pcp:2096kB local_pcp:592kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB Node 0 DMA32: 5*4kB (UM) 1*8kB (M) 2*16kB (UM) 4*32kB (UM) 3*64kB (M) 3*128kB (UM) 3*256kB (UM) 2*512kB (M) 4*1024kB (UM) 3*2048kB (UM) 3*4096kB (M) = 25084kB __alloc_pages_slowpath+0x26e8/0x2e10 mm/page_alloc.c:4302 Node 0 Normal: 2293*4kB (UMEH) 342*8kB (ME) 71*16kB (ME) 22*32kB (ME) 3*64kB (M) 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13940kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 269 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 1965979 pages RAM 0 pages HighMem/MovableOnly 342853 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb syz-executor0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-executor0 cpuset=syz0 mems_allowed=0 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4395 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] kmem_getpages mm/slab.c:1409 [inline] cache_grow_begin+0xa5/0x8c0 mm/slab.c:2677 fallback_alloc+0x204/0x2e0 mm/slab.c:3219 ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0xe3/0x730 mm/slab.c:3642 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x314/0x690 net/ipv6/addrconf.c:3836 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:771 [inline] RIP: 0010:preempt_schedule_irq+0xaf/0x140 kernel/sched/core.c:3698 Code: 00 e8 d5 b2 7b f9 e8 00 98 ab f9 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 75 73 48 83 3d 1a e1 77 01 00 74 61 fb 66 0f 1f 44 00 00 01 00 00 00 e8 f7 cd ff ff 41 80 7d 00 00 75 6c 48 83 3d f0 e0 RSP: 0018:ffff880198615410 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff12a3f78 RBX: 0000000000000000 RCX: 1ffff100330c1969 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88019860cafc RBP: ffff880198615438 R08: ffff88019860cb48 R09: 0000000000000006 R10: 0000000000000000 R11: ffff88019860c280 R12: dffffc0000000000 R13: fffffbfff12a3f77 R14: ffffffff8951fbc0 R15: ffffffff8951fbb8 retint_kernel+0x1b/0x2d RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:dump_stack+0x358/0x39d lib/dump_stack.c:118 Code: 74 0c 48 c7 c7 b0 fb 51 89 e8 51 94 ef f9 48 83 3d 89 b6 7e 01 00 0f 84 63 fe ff ff e8 7e 45 ac f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 6b 45 ac f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 RSP: 0018:ffff8801986154f0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff02 RAX: ffff88019860c280 RBX: 1ffffffff12a3f76 RCX: 1ffff100330c1969 RDX: 0000000000000000 RSI: ffffffff87d34532 RDI: 0000000000000293 RBP: ffff880198615598 R08: ffff88019860cb48 R09: 0000000000000006 R10: 0000000000000000 R11: ffff88019860c280 R12: 1ffff100330c2aa6 R13: 00000000ffffffff R14: 0000000000000200 R15: 0000000000000001 dump_header+0x27b/0xf72 mm/oom_kill.c:441 oom_kill_process.cold.27+0x10/0x903 mm/oom_kill.c:953 out_of_memory+0xa84/0x1430 mm/oom_kill.c:1120 __alloc_pages_may_oom mm/page_alloc.c:3519 [inline] __alloc_pages_slowpath+0x2354/0x2e10 mm/page_alloc.c:4240 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4395 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] kmem_getpages mm/slab.c:1409 [inline] cache_grow_begin+0xa5/0x8c0 mm/slab.c:2677 fallback_alloc+0x204/0x2e0 mm/slab.c:3219 ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0xe3/0x730 mm/slab.c:3642 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] nlmsg_new include/net/netlink.h:654 [inline] rtmsg_ifinfo_build_skb+0x74/0x190 net/core/rtnetlink.c:3396 rtmsg_ifinfo_event.part.31+0x45/0xe0 net/core/rtnetlink.c:3432 rtmsg_ifinfo_event net/core/rtnetlink.c:3443 [inline] rtmsg_ifinfo+0x8c/0xa0 net/core/rtnetlink.c:3441 dev_close_many+0x3be/0x860 net/core/dev.c:1502 rollback_registered_many+0x543/0x1250 net/core/dev.c:7979 rollback_registered+0x1e9/0x420 net/core/dev.c:8044 unregister_netdevice_queue+0x321/0x5e0 net/core/dev.c:9088 unregister_netdevice include/linux/netdevice.h:2625 [inline] __tun_detach+0x11b8/0x15c0 drivers/net/tun.c:723 tun_detach drivers/net/tun.c:740 [inline] tun_chr_close+0xe3/0x180 drivers/net/tun.c:3376 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1ad6/0x26d0 kernel/exit.c:867 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8b0/0x1980 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410fa0 Code: Bad RIP value. RSP: 002b:00007fffdb160f18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000410fa0 RDX: 0000000000000038 RSI: 0000000000728020 RDI: 00000000000000f9 RBP: 0000000000000003 R08: 00000000000003b8 R09: 0000000000004000 R10: 000000000070b660 R11: 0000000000000246 R12: 000000000000001b R13: 000000000002bb1a R14: 0000000000000081 R15: 0000000000000005 CPU: 0 PID: 11933 Comm: syz-executor0 Not tainted 4.20.0-rc1+ #145 ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 syz-executor5: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3423 syz-executor5 cpuset=syz5 mems_allowed=0 __alloc_pages_slowpath+0x26e8/0x2e10 mm/page_alloc.c:4302 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4395 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] kmem_getpages mm/slab.c:1409 [inline] cache_grow_begin+0xa5/0x8c0 mm/slab.c:2677 fallback_alloc+0x204/0x2e0 mm/slab.c:3219 ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0xe3/0x730 mm/slab.c:3642 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x314/0x690 net/ipv6/addrconf.c:3836 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:slab_alloc_node mm/slab.c:3329 [inline] RIP: 0010:kmem_cache_alloc_node_trace+0x249/0x740 mm/slab.c:3661 Code: 3f 7e 0f 85 32 ff ff ff e8 93 e7 3d ff e9 28 ff ff ff e8 fa 1c c3 ff 48 83 3d 12 66 8f 07 00 0f 84 33 01 00 00 4c 89 ff 57 9d <0f> 1f 44 00 00 e9 c1 fe ff ff 31 d2 be a5 01 00 00 48 c7 c7 92 b7 RSP: 0000:ffff88019aa57498 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8801ce5fec40 RDI: 0000000000000286 RBP: ffff88019aa57510 R08: ffff8801ce5fe3c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801da800c40 R13: ffff8801da800c40 R14: 0000000000000000 R15: 0000000000000286 __do_kmalloc_node mm/slab.c:3683 [inline] __kmalloc_node_track_caller+0x3c/0x70 mm/slab.c:3698 __kmalloc_reserve.isra.40+0xcc/0xe0 net/core/skbuff.c:145 pskb_expand_head+0x230/0x10f0 net/core/skbuff.c:1460 skb_ensure_writable+0x3dd/0x640 net/core/skbuff.c:5073 __bpf_try_make_writable net/core/filter.c:1638 [inline] bpf_try_make_writable net/core/filter.c:1644 [inline] bpf_try_make_head_writable net/core/filter.c:1652 [inline] ____bpf_clone_redirect net/core/filter.c:2089 [inline] bpf_clone_redirect+0x14a/0x490 net/core/filter.c:2067 bpf_prog_bebbfe2050753572+0x41e/0x1000 CPU: 1 PID: 6171 Comm: syz-executor5 Not tainted 4.20.0-rc1+ #145 warn_alloc_show_mem: 1 callbacks suppressed Mem-Info: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 active_anon:59915 inactive_anon:187 isolated_anon:0 active_file:12 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:9466 slab_unreclaimable:1452955 mapped:16403 shmem:244 pagetables:476 bounce:0 free:13733 free_pcp:586 free_cma:0 Call Trace: Node 0 active_anon:239660kB inactive_anon:748kB active_file:48kB inactive_file:52kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:65612kB dirty:0kB writeback:0kB shmem:976kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 145408kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Node 0 DMA free:15908kB min:164kB low:204kB high:244kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 lowmem_reserve[]: 0 2818 6321 6321 Node 0 DMA32 free:25084kB min:30052kB low:37564kB high:45076kB active_anon:4096kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2888776kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:248kB local_pcp:0kB free_cma:0kB warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3423 lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:13940kB min:37364kB low:46704kB high:56044kB active_anon:235564kB inactive_anon:748kB active_file:48kB inactive_file:52kB unevictable:0kB writepending:0kB present:4718592kB managed:3587820kB mlocked:0kB kernel_stack:6752kB pagetables:1904kB bounce:0kB free_pcp:2096kB local_pcp:592kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB Node 0 DMA32: 5*4kB (UM) 1*8kB (M) 2*16kB (UM) 4*32kB (UM) 3*64kB (M) 3*128kB (UM) 3*256kB (UM) 2*512kB (M) 4*1024kB (UM) 3*2048kB (UM) 3*4096kB (M) = 25084kB __alloc_pages_slowpath+0x26e8/0x2e10 mm/page_alloc.c:4302 Node 0 Normal: 2293*4kB (UMEH) 342*8kB (ME) 71*16kB (ME) 22*32kB (ME) 3*64kB (M) 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13940kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 269 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 1965979 pages RAM 0 pages HighMem/MovableOnly 342853 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb syz-executor0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-executor0 cpuset=syz0 mems_allowed=0 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4395 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] kmem_getpages mm/slab.c:1409 [inline] cache_grow_begin+0xa5/0x8c0 mm/slab.c:2677 fallback_alloc+0x204/0x2e0 mm/slab.c:3219 ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0xe3/0x730 mm/slab.c:3642 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x314/0x690 net/ipv6/addrconf.c:3836 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:771 [inline] RIP: 0010:preempt_schedule_irq+0xaf/0x140 kernel/sched/core.c:3698 Code: 00 e8 d5 b2 7b f9 e8 00 98 ab f9 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 75 73 48 83 3d 1a e1 77 01 00 74 61 fb 66 0f 1f 44 00 00 01 00 00 00 e8 f7 cd ff ff 41 80 7d 00 00 75 6c 48 83 3d f0 e0 RSP: 0018:ffff880198615410 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff12a3f78 RBX: 0000000000000000 RCX: 1ffff100330c1969 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88019860cafc RBP: ffff880198615438 R08: ffff88019860cb48 R09: 0000000000000006 R10: 0000000000000000 R11: ffff88019860c280 R12: dffffc0000000000 R13: fffffbfff12a3f77 R14: ffffffff8951fbc0 R15: ffffffff8951fbb8 retint_kernel+0x1b/0x2d RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:dump_stack+0x358/0x39d lib/dump_stack.c:118 Code: 74 0c 48 c7 c7 b0 fb 51 89 e8 51 94 ef f9 48 83 3d 89 b6 7e 01 00 0f 84 63 fe ff ff e8 7e 45 ac f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 6b 45 ac f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 RSP: 0018:ffff8801986154f0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff02 RAX: ffff88019860c280 RBX: 1ffffffff12a3f76 RCX: 1ffff100330c1969 RDX: 0000000000000000 RSI: ffffffff87d34532 RDI: 0000000000000293 RBP: ffff880198615598 R08: ffff88019860cb48 R09: 0000000000000006 R10: 0000000000000000 R11: ffff88019860c280 R12: 1ffff100330c2aa6 R13: 00000000ffffffff R14: 0000000000000200 R15: 0000000000000001 dump_header+0x27b/0xf72 mm/oom_kill.c:441 oom_kill_process.cold.27+0x10/0x903 mm/oom_kill.c:953 out_of_memory+0xa84/0x1430 mm/oom_kill.c:1120 __alloc_pages_may_oom mm/page_alloc.c:3519 [inline] __alloc_pages_slowpath+0x2354/0x2e10 mm/page_alloc.c:4240 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4395 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] kmem_getpages mm/slab.c:1409 [inline] cache_grow_begin+0xa5/0x8c0 mm/slab.c:2677 fallback_alloc+0x204/0x2e0 mm/slab.c:3219 ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0xe3/0x730 mm/slab.c:3642 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] nlmsg_new include/net/netlink.h:654 [inline] rtmsg_ifinfo_build_skb+0x74/0x190 net/core/rtnetlink.c:3396 rtmsg_ifinfo_event.part.31+0x45/0xe0 net/core/rtnetlink.c:3432 rtmsg_ifinfo_event net/core/rtnetlink.c:3443 [inline] rtmsg_ifinfo+0x8c/0xa0 net/core/rtnetlink.c:3441 dev_close_many+0x3be/0x860 net/core/dev.c:1502 rollback_registered_many+0x543/0x1250 net/core/dev.c:7979 rollback_registered+0x1e9/0x420 net/core/dev.c:8044 unregister_netdevice_queue+0x321/0x5e0 net/core/dev.c:9088 unregister_netdevice include/linux/netdevice.h:2625 [inline] __tun_detach+0x11b8/0x15c0 drivers/net/tun.c:723 tun_detach drivers/net/tun.c:740 [inline] tun_chr_close+0xe3/0x180 drivers/net/tun.c:3376 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1ad6/0x26d0 kernel/exit.c:867 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8b0/0x1980 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410fa0 Code: Bad RIP value. RSP: 002b:00007fffdb160f18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000410fa0 RDX: 0000000000000038 RSI: 0000000000728020 RDI: 00000000000000f9 RBP: 0000000000000003 R08: 00000000000003b8 R09: 0000000000004000 R10: 000000000070b660 R11: 0000000000000246 R12: 000000000000001b R13: 000000000002bb1a R14: 0000000000000081 R15: 0000000000000005 CPU: 0 PID: 11933 Comm: syz-executor0 Not tainted 4.20.0-rc1+ #145 ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 syz-executor5: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3423 syz-executor5 cpuset=syz5 mems_allowed=0 __alloc_pages_slowpath+0x26e8/0x2e10 mm/page_alloc.c:4302