CPU: 0 PID: 5993 Comm: syz-fuzzer Not tainted 4.20.0-rc1+ #82 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=10675 jiffies, g=14105, q=8) Call Trace: rcu: All QSes seen, last rcu_preempt kthread activity 10673 (4294970487-4294959814), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor3 R running task 17776 9080 6059 0x8010000c __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 75 1d 3e ff e9 28 ff ff ff e8 ec 52 c3 ff 48 83 3d f4 9b 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 d2 ac RSP: 0000:ffff8801daf07450 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 1ffff10038e37159 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff8801daf074c0 R08: ffff8801c71b8ac8 R09: 0000000000000002 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 R10: 0000000000000000 R11: ffff8801c71b8200 R12: ffff8801d9bee600 R13: ffff8801d9bee600 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:dump_stack+0x358/0x39d lib/dump_stack.c:118 Code: 74 0c 48 c7 c7 b0 fb 51 89 e8 21 9e ef f9 48 83 3d c9 c1 7e 01 00 0f 84 63 fe ff ff e8 ce 50 ac f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 bb 50 ac f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 RSP: 0000:ffff8801c2f361e8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801c33d0280 RBX: 1ffffffff12a3f76 RCX: 1ffff1003867a16e RDX: 0000000000000000 RSI: ffffffff87d339f2 RDI: 0000000000000293 RBP: ffff8801c2f36290 R08: ffff8801c33d0b70 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801c33d0280 R12: 1ffff100385e6c45 R13: 00000000ffffffff R14: 0000000000000200 R15: 0000000000000000 dump_header+0x27b/0xf72 mm/oom_kill.c:441 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 oom_kill_process.cold.27+0x10/0x903 mm/oom_kill.c:953 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 mm/slab.c:3385 [inline] RIP: 0010:kmem_cache_alloc+0x297/0x730 mm/slab.c:3552 Code: 7e 0f 85 cf fe ff ff e8 c6 fd 3d ff e9 c5 fe ff ff e8 3d 33 c3 ff 48 83 3d 45 7c 8f 07 00 0f 84 41 03 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 e9 54 fe ff ff 31 d2 be a5 01 00 00 48 c7 c7 d2 ac RSP: 0000:ffff880193817738 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8801c71b8a80 RDI: 0000000000000286 out_of_memory+0xa84/0x1430 mm/oom_kill.c:1120 RBP: ffff8801938177a0 R08: ffff8801c71b8200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8801d9bee600 R14: ffff8801d9bee600 R15: 0000000000480020 skb_clone+0x1bb/0x500 net/core/skbuff.c:1280 __alloc_pages_may_oom mm/page_alloc.c:3519 [inline] __alloc_pages_slowpath+0x2354/0x2e10 mm/page_alloc.c:4240 ____bpf_clone_redirect net/core/filter.c:2080 [inline] bpf_clone_redirect+0xb9/0x490 net/core/filter.c:2067 bpf_prog_bebbfe2050753572+0x289/0x1000 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4395 alloc_pages_current+0x173/0x350 mm/mempolicy.c:2080 alloc_pages include/linux/gfp.h:509 [inline] __page_cache_alloc+0x38c/0x5c0 mm/filemap.c:924 page_cache_read mm/filemap.c:2312 [inline] filemap_fault+0x1595/0x25f0 mm/filemap.c:2496 rcu: rcu_preempt kthread starved for 10673 jiffies! g14105 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 23000 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 ext4_filemap_fault+0x82/0xad fs/ext4/inode.c:6291 __do_fault+0x100/0x6b0 mm/memory.c:2996 schedule+0xfe/0x460 kernel/sched/core.c:3516 do_read_fault mm/memory.c:3408 [inline] do_fault mm/memory.c:3534 [inline] handle_pte_fault mm/memory.c:3765 [inline] __handle_mm_fault+0x3ea0/0x5be0 mm/memory.c:3889 schedule_timeout+0x140/0x260 kernel/time/timer.c:1804 rcu_gp_fqs_loop+0x762/0xa80 kernel/rcu/tree.c:1934 handle_mm_fault+0x54f/0xc70 mm/memory.c:3926 do_user_addr_fault arch/x86/mm/fault.c:1423 [inline] __do_page_fault+0x5e8/0xe60 arch/x86/mm/fault.c:1489 do_page_fault+0xf2/0x7e0 arch/x86/mm/fault.c:1520 rcu_gp_kthread+0x341/0xc70 kernel/rcu/tree.c:2090 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139 RIP: 0033:0x40f9c0 Code: Bad RIP value. RSP: 002b:000000c42001fef8 EFLAGS: 00010216 RAX: ffffffffffffff92 RBX: 000000003b97a2f1 RCX: 000000000045ddf3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000014ecf00 RBP: 000000c42001ff20 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c42001fed8 R11: 0000000000000202 R12: 0000000000000001 R13: 00000000000000f3 R14: 0000000000000033 R15: 0000000000000001 warn_alloc_show_mem: 1 callbacks suppressed Mem-Info: active_anon:50082 inactive_anon:201 isolated_anon:0 active_file:11 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:9052 slab_unreclaimable:1458191 mapped:40962 shmem:244 pagetables:588 bounce:0 free:13738 free_pcp:300 free_cma:0 Node 0 active_anon:200328kB inactive_anon:804kB active_file:44kB inactive_file:52kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:163848kB dirty:0kB writeback:0kB shmem:976kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 184320kB 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:25176kB 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:13868kB min:37364kB low:46704kB high:56044kB active_anon:196232kB inactive_anon:804kB active_file:44kB inactive_file:52kB unevictable:0kB writepending:0kB present:4718592kB managed:3587820kB mlocked:0kB kernel_stack:6656kB pagetables:2352kB bounce:0kB free_pcp:952kB 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: 4*4kB (M) 1*8kB (M) 2*16kB (UM) 3*32kB (M) 3*64kB (M) 2*128kB (M) 2*256kB (M) 3*512kB (UM) 4*1024kB (UM) 3*2048kB (UM) 3*4096kB (M) = 25176kB Node 0 Normal: 775*4kB (UMEH) 460*8kB (UME) 205*16kB (ME) 72*32kB (UME) 22*64kB (UM) 1*128kB (M) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13900kB 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 268 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 kthread+0x35a/0x440 kernel/kthread.c:246 Free swap = 0kB Total swap = 0kB ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 1965979 pages RAM ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb 0 pages HighMem/MovableOnly 342853 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb syz-executor3: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-fuzzer: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-executor3 cpuset=syz3 mems_allowed=0 syz-fuzzer cpuset=/ mems_allowed=0 CPU: 1 PID: 9080 Comm: syz-executor3 Not tainted 4.20.0-rc1+ #82 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 __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 mm/slab.c:3385 [inline] RIP: 0010:kmem_cache_alloc+0x297/0x730 mm/slab.c:3552 Code: 7e 0f 85 cf fe ff ff e8 c6 fd 3d ff e9 c5 fe ff ff e8 3d 33 c3 ff 48 83 3d 45 7c 8f 07 00 0f 84 41 03 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 e9 54 fe ff ff 31 d2 be a5 01 00 00 48 c7 c7 d2 ac RSP: 0000:ffff880193817738 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8801c71b8a80 RDI: 0000000000000286 RBP: ffff8801938177a0 R08: ffff8801c71b8200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8801d9bee600 R14: ffff8801d9bee600 R15: 0000000000480020 skb_clone+0x1bb/0x500 net/core/skbuff.c:1280 ____bpf_clone_redirect net/core/filter.c:2080 [inline] bpf_clone_redirect+0xb9/0x490 net/core/filter.c:2067 bpf_prog_bebbfe2050753572+0x289/0x1000 Mem-Info: CPU: 0 PID: 5993 Comm: syz-fuzzer Not tainted 4.20.0-rc1+ #82 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 active_anon:50082 inactive_anon:201 isolated_anon:0 active_file:11 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:9052 slab_unreclaimable:1458191 mapped:40962 shmem:244 pagetables:588 bounce:0 free:13738 free_pcp:300 free_cma:0 Call Trace: Node 0 active_anon:200328kB inactive_anon:804kB active_file:44kB inactive_file:52kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:163848kB dirty:0kB writeback:0kB shmem:976kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 184320kB 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:25176kB 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:248kB free_cma:0kB warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3423 lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:13868kB min:37364kB low:46704kB high:56044kB active_anon:196232kB inactive_anon:804kB active_file:44kB inactive_file:52kB unevictable:0kB writepending:0kB present:4718592kB managed:3587820kB mlocked:0kB kernel_stack:6656kB pagetables:2352kB bounce:0kB free_pcp:952kB local_pcp:360kB 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: 4*4kB (M) 1*8kB (M) 2*16kB (UM) 3*32kB (M) 3*64kB (M) 2*128kB (M) 2*256kB (M) 3*512kB (UM) 4*1024kB (UM) 3*2048kB (UM) 3*4096kB (M) = 25176kB __alloc_pages_slowpath+0x26e8/0x2e10 mm/page_alloc.c:4302 Node 0 Normal: 775*4kB (UMEH) 460*8kB (UME) 205*16kB (ME) 72*32kB (UME) 22*64kB (UM) 1*128kB (M) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13900kB 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 268 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-executor3: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-executor3 cpuset=syz3 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_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 21 9e ef f9 48 83 3d c9 c1 7e 01 00 0f 84 63 fe ff ff e8 ce 50 ac f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 bb 50 ac f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 RSP: 0000:ffff8801c2f361e8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801c33d0280 RBX: 1ffffffff12a3f76 RCX: 1ffff1003867a16e RDX: 0000000000000000 RSI: ffffffff87d339f2 RDI: 0000000000000293 RBP: ffff8801c2f36290 R08: ffff8801c33d0b70 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801c33d0280 R12: 1ffff100385e6c45 R13: 00000000ffffffff R14: 0000000000000200 R15: 0000000000000000 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_current+0x173/0x350 mm/mempolicy.c:2080 alloc_pages include/linux/gfp.h:509 [inline] __page_cache_alloc+0x38c/0x5c0 mm/filemap.c:924 page_cache_read mm/filemap.c:2312 [inline] filemap_fault+0x1595/0x25f0 mm/filemap.c:2496 ext4_filemap_fault+0x82/0xad fs/ext4/inode.c:6291 __do_fault+0x100/0x6b0 mm/memory.c:2996 do_read_fault mm/memory.c:3408 [inline] do_fault mm/memory.c:3534 [inline] handle_pte_fault mm/memory.c:3765 [inline] __handle_mm_fault+0x3ea0/0x5be0 mm/memory.c:3889 handle_mm_fault+0x54f/0xc70 mm/memory.c:3926 do_user_addr_fault arch/x86/mm/fault.c:1423 [inline] __do_page_fault+0x5e8/0xe60 arch/x86/mm/fault.c:1489 do_page_fault+0xf2/0x7e0 arch/x86/mm/fault.c:1520 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139 RIP: 0033:0x40f9c0 Code: Bad RIP value. RSP: 002b:000000c42001fef8 EFLAGS: 00010216 RAX: ffffffffffffff92 RBX: 000000003b97a2f1 RCX: 000000000045ddf3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000014ecf00 RBP: 000000c42001ff20 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c42001fed8 R11: 0000000000000202 R12: 0000000000000001 R13: 00000000000000f3 R14: 0000000000000033 R15: 0000000000000001 CPU: 1 PID: 9080 Comm: syz-executor3 Not tainted 4.20.0-rc1+ #82 Mem-Info: active_anon:50082 inactive_anon:201 isolated_anon:0 active_file:11 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:9052 slab_unreclaimable:1458191 mapped:40962 shmem:244 pagetables:588 bounce:0 free:13738 free_pcp:300 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:200328kB inactive_anon:804kB active_file:44kB inactive_file:52kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:163848kB dirty:0kB writeback:0kB shmem:976kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 184320kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Call Trace: 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 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 Node 0 DMA32 free:25176kB 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 warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3423 Node 0 Normal free:13868kB min:37364kB low:46704kB high:56044kB active_anon:196232kB inactive_anon:804kB active_file:44kB inactive_file:52kB unevictable:0kB writepending:0kB present:4718592kB managed:3587820kB mlocked:0kB kernel_stack:6656kB pagetables:2352kB bounce:0kB free_pcp:952kB 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: 4*4kB (M) 1*8kB (M) 2*16kB (UM) 3*32kB (M) 3*64kB (M) 2*128kB (M) 2*256kB (M) 3*512kB (UM) 4*1024kB (UM) 3*2048kB (UM) 3*4096kB (M) = 25176kB Node 0 Normal: 775*4kB (UMEH) 460*8kB (UME) 205*16kB (ME) 72*32kB (UME) 22*64kB (UM) 1*128kB (M) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13900kB __alloc_pages_slowpath+0x26e8/0x2e10 mm/page_alloc.c:4302 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 268 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-fuzzer: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-fuzzer cpuset=/ 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_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:slab_alloc mm/slab.c:3385 [inline] RIP: 0010:kmem_cache_alloc+0x297/0x730 mm/slab.c:3552 Code: 7e 0f 85 cf fe ff ff e8 c6 fd 3d ff e9 c5 fe ff ff e8 3d 33 c3 ff 48 83 3d 45 7c 8f 07 00 0f 84 41 03 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 e9 54 fe ff ff 31 d2 be a5 01 00 00 48 c7 c7 d2 ac RSP: 0000:ffff880193817738 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8801c71b8a80 RDI: 0000000000000286 RBP: ffff8801938177a0 R08: ffff8801c71b8200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8801d9bee600 R14: ffff8801d9bee600 R15: 0000000000480020 skb_clone+0x1bb/0x500 net/core/skbuff.c:1280 ____bpf_clone_redirect net/core/filter.c:2080 [inline] bpf_clone_redirect+0xb9/0x490 net/core/filter.c:2067 bpf_prog_bebbfe2050753572+0x289/0x1000 CPU: 0 PID: 5993 Comm: syz-fuzzer Not tainted 4.20.0-rc1+ #82 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-executor3: 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-executor3 cpuset=syz3 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:dump_stack+0x358/0x39d lib/dump_stack.c:118 Code: 74 0c 48 c7 c7 b0 fb 51 89 e8 21 9e ef f9 48 83 3d c9 c1 7e 01 00 0f 84 63 fe ff ff e8 ce 50 ac f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 bb 50 ac f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 RSP: 0000:ffff8801c2f361e8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801c33d0280 RBX: 1ffffffff12a3f76 RCX: 1ffff1003867a16e RDX: 0000000000000000 RSI: ffffffff87d339f2 RDI: 0000000000000293 RBP: ffff8801c2f36290 R08: ffff8801c33d0b70 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801c33d0280 R12: 1ffff100385e6c45 R13: 00000000ffffffff R14: 0000000000000200 R15: 0000000000000000 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_current+0x173/0x350 mm/mempolicy.c:2080 alloc_pages include/linux/gfp.h:509 [inline] __page_cache_alloc+0x38c/0x5c0 mm/filemap.c:924 page_cache_read mm/filemap.c:2312 [inline] filemap_fault+0x1595/0x25f0 mm/filemap.c:2496 ext4_filemap_fault+0x82/0xad fs/ext4/inode.c:6291 __do_fault+0x100/0x6b0 mm/memory.c:2996 do_read_fault mm/memory.c:3408 [inline] do_fault mm/memory.c:3534 [inline] handle_pte_fault mm/memory.c:3765 [inline] __handle_mm_fault+0x3ea0/0x5be0 mm/memory.c:3889 handle_mm_fault+0x54f/0xc70 mm/memory.c:3926 do_user_addr_fault arch/x86/mm/fault.c:1423 [inline] __do_page_fault+0x5e8/0xe60 arch/x86/mm/fault.c:1489 do_page_fault+0xf2/0x7e0 arch/x86/mm/fault.c:1520 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139 RIP: 0033:0x40f9c0 Code: Bad RIP value. RSP: 002b:000000c42001fef8 EFLAGS: 00010216 RAX: ffffffffffffff92 RBX: 000000003b97a2f1 RCX: 000000000045ddf3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000014ecf00 RBP: 000000c42001ff20 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c42001fed8 R11: 0000000000000202 R12: 0000000000000001 R13: 00000000000000f3 R14: 0000000000000033 R15: 0000000000000001 CPU: 1 PID: 9080 Comm: syz-executor3 Not tainted 4.20.0-rc1+ #82 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:50082 inactive_anon:201 isolated_anon:0 active_file:11 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:9052 slab_unreclaimable:1458191 mapped:40962 shmem:244 pagetables:588 bounce:0 free:13738 free_pcp:300 free_cma:0 Call Trace: Node 0 active_anon:200328kB inactive_anon:804kB active_file:44kB inactive_file:52kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:163848kB dirty:0kB writeback:0kB shmem:976kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 184320kB 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:25176kB 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:13868kB min:37364kB low:46704kB high:56044kB active_anon:196232kB inactive_anon:804kB active_file:44kB inactive_file:52kB unevictable:0kB writepending:0kB present:4718592kB managed:3587820kB mlocked:0kB kernel_stack:6656kB pagetables:2352kB bounce:0kB free_pcp:952kB 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: 4*4kB (M) 1*8kB (M) 2*16kB (UM) 3*32kB (M) 3*64kB (M) 2*128kB (M) 2*256kB (M) 3*512kB (UM) 4*1024kB (UM) 3*2048kB (UM) 3*4096kB (M) = 25176kB __alloc_pages_slowpath+0x26e8/0x2e10 mm/page_alloc.c:4302 Node 0 Normal: 775*4kB (UMEH) 460*8kB (UME) 205*16kB (ME) 72*32kB (UME) 22*64kB (UM) 1*128kB (M) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13900kB 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 268 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-fuzzer: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-fuzzer cpuset=/ 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_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:slab_alloc mm/slab.c:3385 [inline] RIP: 0010:kmem_cache_alloc+0x297/0x730 mm/slab.c:3552 Code: 7e 0f 85 cf fe ff ff e8 c6 fd 3d ff e9 c5 fe ff ff e8 3d 33 c3 ff 48 83 3d 45 7c 8f 07 00 0f 84 41 03 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 e9 54 fe ff ff 31 d2 be a5 01 00 00 48 c7 c7 d2 ac RSP: 0000:ffff880193817738 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8801c71b8a80 RDI: 0000000000000286 RBP: ffff8801938177a0 R08: ffff8801c71b8200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8801d9bee600 R14: ffff8801d9bee600 R15: 0000000000480020 skb_clone+0x1bb/0x500 net/core/skbuff.c:1280 ____bpf_clone_redirect net/core/filter.c:2080 [inline] bpf_clone_redirect+0xb9/0x490 net/core/filter.c:2067 bpf_prog_bebbfe2050753572+0x289/0x1000 CPU: 0 PID: 5993 Comm: syz-fuzzer Not tainted 4.20.0-rc1+ #82 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-executor3: 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-executor3 cpuset=syz3 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:dump_stack+0x358/0x39d lib/dump_stack.c:118 Code: 74 0c 48 c7 c7 b0 fb 51 89 e8 21 9e ef f9 48 83 3d c9 c1 7e 01 00 0f 84 63 fe ff ff e8 ce 50 ac f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 bb 50 ac f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 RSP: 0000:ffff8801c2f361e8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801c33d0280 RBX: 1ffffffff12a3f76 RCX: 1ffff1003867a16e RDX: 0000000000000000 RSI: ffffffff87d339f2 RDI: 0000000000000293 RBP: ffff8801c2f36290 R08: ffff8801c33d0b70 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801c33d0280 R12: 1ffff100385e6c45 R13: 00000000ffffffff R14: 0000000000000200 R15: 0000000000000000 dump_header+0x27b/0xf72 mm/oom_kill.c:441