run_ksoftirqd+0x5e/0x100 kernel/softirq.c:654 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 CPU: 1 PID: 6027 Comm: syz-fuzzer Not tainted 4.20.0-rc1-next-20181109+ #110 rcu: INFO: rcu_preempt self-detected stall on CPU Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 rcu: 0-...!: (1 GPs behind) idle=5b2/1/0x4000000000000002 softirq=29624/29625 fqs=0 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:3419 __alloc_pages_slowpath+0x26fe/0x2e30 mm/page_alloc.c:4298 rcu: (t=10601 jiffies g=34565 q=33) rcu: rcu_preempt kthread starved for 10601 jiffies! g34565 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 22776 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 schedule+0xef/0x370 kernel/sched/core.c:3516 __alloc_pages_nodemask+0xa7b/0xdd0 mm/page_alloc.c:4391 schedule_timeout+0x140/0x260 kernel/time/timer.c:1804 rcu_gp_fqs_loop+0x762/0xa80 kernel/rcu/tree.c:1948 __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+0x114/0x770 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+0x26d/0x920 kernel/time/timer.c:1326 rcu_gp_kthread+0x341/0xc70 kernel/rcu/tree.c:2105 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e0/0xc60 kernel/time/timer.c:1682 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 0 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 b1 2d fc f9 48 83 3d a9 28 8b 01 00 0f 84 63 fe ff ff e8 9e d5 b8 f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 8b d5 b8 f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 RSP: 0000:ffff8801b2bae1e8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801c1f40700 RBX: 1ffffffff12a3f76 RCX: 1ffff100383e81fe RDX: 0000000000000000 RSI: ffffffff87c6d312 RDI: 0000000000000293 RBP: ffff8801b2bae290 R08: ffff8801c1f40ff0 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801c1f40700 R12: 1ffff10036575c45 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+0xa7f/0x1430 mm/oom_kill.c:1120 __alloc_pages_may_oom mm/page_alloc.c:3515 [inline] __alloc_pages_slowpath+0x236a/0x2e30 mm/page_alloc.c:4236 __alloc_pages_nodemask+0xa7b/0xdd0 mm/page_alloc.c:4391 alloc_pages_current+0x173/0x350 mm/mempolicy.c:2080 alloc_pages include/linux/gfp.h:509 [inline] __page_cache_alloc+0x3ce/0x570 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:6292 __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+0x5d6/0xe40 arch/x86/mm/fault.c:1489 do_page_fault+0xed/0x7d1 arch/x86/mm/fault.c:1520 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139 RIP: 0033:0x45ddf3 Code: Bad RIP value. RSP: 002b:000000c420024ea0 EFLAGS: 00010202 RAX: ffffffffffffff92 RBX: 000000003b94b068 RCX: 000000000045ddf3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000014ecf00 RBP: 000000c420024ee8 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c420024ed8 R11: 0000000000000202 R12: 0000000000000001 R13: 000000000000001f R14: 0000000000b81d20 R15: 000000000000a6f6 warn_alloc_show_mem: 1 callbacks suppressed CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.20.0-rc1-next-20181109+ #110 Mem-Info: active_anon:129018 inactive_anon:195 isolated_anon:0 active_file:12 inactive_file:15 isolated_file:0 unevictable:1 dirty:0 writeback:0 unstable:0 slab_reclaimable:8796 slab_unreclaimable:1376794 mapped:49154 shmem:268 pagetables:1480 bounce:0 free:13741 free_pcp:161 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:516072kB inactive_anon:780kB active_file:48kB inactive_file:60kB unevictable:4kB isolated(anon):0kB isolated(file):0kB mapped:196616kB dirty:0kB writeback:0kB shmem:1072kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 143360kB 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:25152kB min:30052kB low:37564kB high:45076kB active_anon:8244kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2888772kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:13904kB min:37364kB low:46704kB high:56044kB active_anon:507828kB inactive_anon:780kB active_file:48kB inactive_file:60kB unevictable:4kB writepending:0kB present:4718592kB managed:3587820kB mlocked:0kB kernel_stack:7776kB pagetables:5920kB bounce:0kB free_pcp:644kB local_pcp:396kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101 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: 0*4kB 0*8kB 2*16kB (UM) 3*32kB (UM) 3*64kB (M) 4*128kB (M) 3*256kB (M) 4*512kB (UM) 3*1024kB (UM) 1*2048kB (U) 4*4096kB (M) = 25152kB nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62 Node 0 Normal: 562*4kB (ME) 589*8kB (UME) 252*16kB (MH) 1*32kB (H) 1*64kB (H) 2*128kB (UH) 2*256kB (UH) 2*512kB (UH) 1*1024kB (H) 0*2048kB 0*4096kB = 13904kB arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB trigger_single_cpu_backtrace include/linux/nmi.h:162 [inline] rcu_dump_cpu_stacks+0x16f/0x1bc kernel/rcu/tree.c:1211 Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 296 total pagecache pages print_cpu_stall.cold.70+0x218/0x40a kernel/rcu/tree.c:1348 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 342854 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 check_cpu_stall kernel/rcu/tree.c:1422 [inline] rcu_pending kernel/rcu/tree.c:3018 [inline] rcu_check_callbacks+0xf3b/0x13f0 kernel/rcu/tree.c:2521 update_process_times+0x2d/0x70 kernel/time/timer.c:1636 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x412/0x10c0 kernel/time/hrtimer.c:1460 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 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 d5 f4 3d ff e9 28 ff ff ff e8 4c 48 c3 ff 48 83 3d 44 73 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 c2 b9 RSP: 0000:ffff8801d9aff410 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 1ffff1003b35e15c RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000282 RBP: ffff8801d9aff480 R08: ffff8801d9af0ae0 R09: 0000000000000002 R10: 0000000000000000 R11: ffff8801d9af0240 R12: ffff8801d9bf1c00 R13: ffff8801d9bf1c00 R14: 0000000000000000 R15: 0000000000000282 __alloc_skb+0x114/0x770 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+0x26d/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e0/0xc60 kernel/time/timer.c:1682 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 run_ksoftirqd+0x5e/0x100 kernel/softirq.c:654 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 CPU: 1 PID: 6027 Comm: syz-fuzzer Not tainted 4.20.0-rc1-next-20181109+ #110 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 ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3419 ksoftirqd/0 cpuset=/ mems_allowed=0 __alloc_pages_slowpath+0x26fe/0x2e30 mm/page_alloc.c:4298 __alloc_pages_nodemask+0xa7b/0xdd0 mm/page_alloc.c:4391 __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+0x114/0x770 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+0x26d/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e0/0xc60 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 b1 2d fc f9 48 83 3d a9 28 8b 01 00 0f 84 63 fe ff ff e8 9e d5 b8 f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 8b d5 b8 f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 RSP: 0000:ffff8801b2bae1e8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801c1f40700 RBX: 1ffffffff12a3f76 RCX: 1ffff100383e81fe RDX: 0000000000000000 RSI: ffffffff87c6d312 RDI: 0000000000000293 RBP: ffff8801b2bae290 R08: ffff8801c1f40ff0 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801c1f40700 R12: 1ffff10036575c45 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+0xa7f/0x1430 mm/oom_kill.c:1120 __alloc_pages_may_oom mm/page_alloc.c:3515 [inline] __alloc_pages_slowpath+0x236a/0x2e30 mm/page_alloc.c:4236 __alloc_pages_nodemask+0xa7b/0xdd0 mm/page_alloc.c:4391 alloc_pages_current+0x173/0x350 mm/mempolicy.c:2080 alloc_pages include/linux/gfp.h:509 [inline] __page_cache_alloc+0x3ce/0x570 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:6292 __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+0x5d6/0xe40 arch/x86/mm/fault.c:1489 do_page_fault+0xed/0x7d1 arch/x86/mm/fault.c:1520 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139 RIP: 0033:0x45ddf3 Code: Bad RIP value. RSP: 002b:000000c420024ea0 EFLAGS: 00010202 RAX: ffffffffffffff92 RBX: 000000003b94b068 RCX: 000000000045ddf3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000014ecf00 RBP: 000000c420024ee8 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c420024ed8 R11: 0000000000000202 R12: 0000000000000001 R13: 000000000000001f R14: 0000000000b81d20 R15: 000000000000a6f6 Mem-Info: CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 active_anon:129018 inactive_anon:195 isolated_anon:0 active_file:12 inactive_file:15 isolated_file:0 unevictable:1 dirty:0 writeback:0 unstable:0 slab_reclaimable:8796 slab_unreclaimable:1376794 mapped:49154 shmem:268 pagetables:1480 bounce:0 free:13741 free_pcp:161 free_cma:0 Call Trace: Node 0 active_anon:516072kB inactive_anon:780kB active_file:48kB inactive_file:60kB unevictable:4kB isolated(anon):0kB isolated(file):0kB mapped:196616kB dirty:0kB writeback:0kB shmem:1072kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 143360kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 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 warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3419 Node 0 DMA32 free:25152kB min:30052kB low:37564kB high:45076kB active_anon:8244kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2888772kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:13904kB min:37364kB low:46704kB high:56044kB active_anon:507828kB inactive_anon:780kB active_file:48kB inactive_file:60kB unevictable:4kB writepending:0kB present:4718592kB managed:3587820kB mlocked:0kB kernel_stack:7776kB pagetables:5920kB bounce:0kB free_pcp:644kB local_pcp:396kB 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 __alloc_pages_slowpath+0x26fe/0x2e30 mm/page_alloc.c:4298 Node 0 DMA32: 0*4kB 0*8kB 2*16kB (UM) 3*32kB (UM) 3*64kB (M) 4*128kB (M) 3*256kB (M) 4*512kB (UM) 3*1024kB (UM) 1*2048kB (U) 4*4096kB (M) = 25152kB Node 0 Normal: 562*4kB (ME) 589*8kB (UME) 252*16kB (MH) 1*32kB (H) 1*64kB (H) 2*128kB (UH) 2*256kB (UH) 2*512kB (UH) 1*1024kB (H) 0*2048kB 0*4096kB = 13904kB 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 296 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 342854 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+0xa7b/0xdd0 mm/page_alloc.c:4391 __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+0x114/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] nlmsg_new include/net/netlink.h:654 [inline] __br_mdb_notify+0x4ff/0x15d0 net/bridge/br_mdb.c:407 br_mdb_notify+0x310/0x410 net/bridge/br_mdb.c:440 br_multicast_del_pg+0x3df/0x790 net/bridge/br_multicast.c:292 br_multicast_port_group_expired+0x189/0x1e0 net/bridge/br_multicast.c:316 call_timer_fn+0x26d/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e0/0xc60 kernel/time/timer.c:1682 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 run_ksoftirqd+0x5e/0x100 kernel/softirq.c:654 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 CPU: 1 PID: 6027 Comm: syz-fuzzer Not tainted 4.20.0-rc1-next-20181109+ #110 ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ksoftirqd/0 cpuset=/ mems_allowed=0 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:3419 __alloc_pages_slowpath+0x26fe/0x2e30 mm/page_alloc.c:4298 __alloc_pages_nodemask+0xa7b/0xdd0 mm/page_alloc.c:4391 __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+0x114/0x770 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+0x26d/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e0/0xc60 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 b1 2d fc f9 48 83 3d a9 28 8b 01 00 0f 84 63 fe ff ff e8 9e d5 b8 f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 8b d5 b8 f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 RSP: 0000:ffff8801b2bae1e8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801c1f40700 RBX: 1ffffffff12a3f76 RCX: 1ffff100383e81fe RDX: 0000000000000000 RSI: ffffffff87c6d312 RDI: 0000000000000293 RBP: ffff8801b2bae290 R08: ffff8801c1f40ff0 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801c1f40700 R12: 1ffff10036575c45 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+0xa7f/0x1430 mm/oom_kill.c:1120 __alloc_pages_may_oom mm/page_alloc.c:3515 [inline] __alloc_pages_slowpath+0x236a/0x2e30 mm/page_alloc.c:4236 __alloc_pages_nodemask+0xa7b/0xdd0 mm/page_alloc.c:4391 alloc_pages_current+0x173/0x350 mm/mempolicy.c:2080 alloc_pages include/linux/gfp.h:509 [inline] __page_cache_alloc+0x3ce/0x570 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:6292 __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+0x5d6/0xe40 arch/x86/mm/fault.c:1489 do_page_fault+0xed/0x7d1 arch/x86/mm/fault.c:1520 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139 RIP: 0033:0x45ddf3 Code: Bad RIP value. RSP: 002b:000000c420024ea0 EFLAGS: 00010202 RAX: ffffffffffffff92 RBX: 000000003b94b068 RCX: 000000000045ddf3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000014ecf00 RBP: 000000c420024ee8 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c420024ed8 R11: 0000000000000202 R12: 0000000000000001 R13: 000000000000001f R14: 0000000000b81d20 R15: 000000000000a6f6 warn_alloc_show_mem: 1 callbacks suppressed CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.20.0-rc1-next-20181109+ #110 Mem-Info: active_anon:129018 inactive_anon:195 isolated_anon:0 active_file:12 inactive_file:15 isolated_file:0 unevictable:1 dirty:0 writeback:0 unstable:0 slab_reclaimable:8796 slab_unreclaimable:1376794 mapped:49154 shmem:268 pagetables:1480 bounce:0 free:13741 free_pcp:161 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:516072kB inactive_anon:780kB active_file:48kB inactive_file:60kB unevictable:4kB isolated(anon):0kB isolated(file):0kB mapped:196616kB dirty:0kB writeback:0kB shmem:1072kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 143360kB 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 __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:25152kB min:30052kB low:37564kB high:45076kB active_anon:8244kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2888772kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3419 lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:13904kB min:37364kB low:46704kB high:56044kB active_anon:507828kB inactive_anon:780kB active_file:48kB inactive_file:60kB unevictable:4kB writepending:0kB present:4718592kB managed:3587820kB mlocked:0kB kernel_stack:7776kB pagetables:5920kB bounce:0kB free_pcp:644kB local_pcp:396kB 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: 0*4kB 0*8kB 2*16kB (UM) 3*32kB (UM) 3*64kB (M) 4*128kB (M) 3*256kB (M) 4*512kB (UM) 3*1024kB (UM) 1*2048kB (U) 4*4096kB (M) = 25152kB __alloc_pages_slowpath+0x26fe/0x2e30 mm/page_alloc.c:4298 Node 0 Normal: 562*4kB (ME) 589*8kB (UME) 252*16kB (MH) 1*32kB (H) 1*64kB (H) 2*128kB (UH) 2*256kB (UH) 2*512kB (UH) 1*1024kB (H) 0*2048kB 0*4096kB = 13904kB 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 296 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 342854 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+0xa7b/0xdd0 mm/page_alloc.c:4391 __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+0x114/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] nlmsg_new include/net/netlink.h:654 [inline] __br_mdb_notify+0x4ff/0x15d0 net/bridge/br_mdb.c:407 br_mdb_notify+0x310/0x410 net/bridge/br_mdb.c:440 br_multicast_del_pg+0x3df/0x790 net/bridge/br_multicast.c:292 br_multicast_port_group_expired+0x189/0x1e0 net/bridge/br_multicast.c:316 call_timer_fn+0x26d/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e0/0xc60 kernel/time/timer.c:1682 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 run_ksoftirqd+0x5e/0x100 kernel/softirq.c:654 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 CPU: 1 PID: 6027 Comm: syz-fuzzer Not tainted 4.20.0-rc1-next-20181109+ #110 ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) 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 ksoftirqd/0 cpuset=/ mems_allowed=0 warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3419 __alloc_pages_slowpath+0x26fe/0x2e30 mm/page_alloc.c:4298 __alloc_pages_nodemask+0xa7b/0xdd0 mm/page_alloc.c:4391 __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+0x114/0x770 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+0x26d/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e0/0xc60 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 b1 2d fc f9 48 83 3d a9 28 8b 01 00 0f 84 63 fe ff ff e8 9e d5 b8 f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 8b d5 b8 f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 RSP: 0000:ffff8801b2bae1e8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801c1f40700 RBX: 1ffffffff12a3f76 RCX: 1ffff100383e81fe RDX: 0000000000000000 RSI: ffffffff87c6d312 RDI: 0000000000000293 RBP: ffff8801b2bae290 R08: ffff8801c1f40ff0 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801c1f40700 R12: 1ffff10036575c45 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+0xa7f/0x1430 mm/oom_kill.c:1120 __alloc_pages_may_oom mm/page_alloc.c:3515 [inline] __alloc_pages_slowpath+0x236a/0x2e30 mm/page_alloc.c:4236 __alloc_pages_nodemask+0xa7b/0xdd0 mm/page_alloc.c:4391 alloc_pages_current+0x173/0x350 mm/mempolicy.c:2080 alloc_pages include/linux/gfp.h:509 [inline] __page_cache_alloc+0x3ce/0x570 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:6292 __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+0x5d6/0xe40 arch/x86/mm/fault.c:1489 do_page_fault+0xed/0x7d1 arch/x86/mm/fault.c:1520 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139 RIP: 0033:0x45ddf3 Code: Bad RIP value. RSP: 002b:000000c420024ea0 EFLAGS: 00010202 RAX: ffffffffffffff92 RBX: 000000003b94b068 RCX: 000000000045ddf3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000014ecf00 RBP: 000000c420024ee8 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c420024ed8 R11: 0000000000000202 R12: 0000000000000001 R13: 000000000000001f R14: 0000000000b81d20 R15: 000000000000a6f6 warn_alloc_show_mem: 1 callbacks suppressed CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.20.0-rc1-next-20181109+ #110 Mem-Info: active_anon:129018 inactive_anon:195 isolated_anon:0 active_file:12 inactive_file:15 isolated_file:0 unevictable:1 dirty:0 writeback:0 unstable:0 slab_reclaimable:8796 slab_unreclaimable:1376794 mapped:49154 shmem:268 pagetables:1480 bounce:0 free:13741 free_pcp:161 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:516072kB inactive_anon:780kB active_file:48kB inactive_file:60kB unevictable:4kB isolated(anon):0kB isolated(file):0kB mapped:196616kB dirty:0kB writeback:0kB shmem:1072kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 143360kB 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 __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:25152kB min:30052kB low:37564kB high:45076kB active_anon:8244kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2888772kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3419 lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:13904kB min:37364kB low:46704kB high:56044kB active_anon:507828kB inactive_anon:780kB active_file:48kB inactive_file:60kB unevictable:4kB writepending:0kB present:4718592kB managed:3587820kB mlocked:0kB kernel_stack:7776kB pagetables:5920kB bounce:0kB free_pcp:644kB local_pcp:396kB 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: 0*4kB 0*8kB 2*16kB (UM) 3*32kB (UM) 3*64kB (M) 4*128kB (M) 3*256kB (M) 4*512kB (UM) 3*1024kB (UM) 1*2048kB (U) 4*4096kB (M) = 25152kB __alloc_pages_slowpath+0x26fe/0x2e30 mm/page_alloc.c:4298 Node 0 Normal: 562*4kB (ME) 589*8kB (UME) 252*16kB (MH) 1*32kB (H) 1*64kB (H) 2*128kB (UH) 2*256kB (UH) 2*512kB (UH) 1*1024kB (H) 0*2048kB 0*4096kB = 13904kB 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 296 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 342854 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+0xa7b/0xdd0 mm/page_alloc.c:4391 __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+0x114/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:997 [inline] nlmsg_new include/net/netlink.h:654 [inline] __br_mdb_notify+0x4ff/0x15d0 net/bridge/br_mdb.c:407 br_mdb_notify+0x310/0x410 net/bridge/br_mdb.c:440 br_multicast_group_expired+0x1bc/0x610 net/bridge/br_multicast.c:253 call_timer_fn+0x26d/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e0/0xc60 kernel/time/timer.c:1682 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 run_ksoftirqd+0x5e/0x100 kernel/softirq.c:654 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 CPU: 1 PID: 6027 Comm: syz-fuzzer Not tainted 4.20.0-rc1-next-20181109+ #110 ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ksoftirqd/0 cpuset=/ mems_allowed=0 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:3419 __alloc_pages_slowpath+0x26fe/0x2e30 mm/page_alloc.c:4298 __alloc_pages_nodemask+0xa7b/0xdd0 mm/page_alloc.c:4391 __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+0x114/0x770 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+0x26d/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e0/0xc60 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 b1 2d fc f9 48 83 3d a9 28 8b 01 00 0f 84 63 fe ff ff e8 9e d5 b8 f9 48 8b bd 70 ff ff ff 57 9d <0f> 1f 44 00 00 e8 8b d5 b8 f9 48 8b 8d 68 ff ff ff b8 ff ff 37 00 RSP: 0000:ffff8801b2bae1e8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801c1f40700 RBX: 1ffffffff12a3f76 RCX: 1ffff100383e81fe RDX: 0000000000000000 RSI: ffffffff87c6d312 RDI: 0000000000000293 RBP: ffff8801b2bae290 R08: ffff8801c1f40ff0 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801c1f40700 R12: 1ffff10036575c45 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+0xa7f/0x1430 mm/oom_kill.c:1120 __alloc_pages_may_oom mm/page_alloc.c:3515 [inline] __alloc_pages_slowpath+0x236a/0x2e30 mm/page_alloc.c:4236