RDX: 000000c420149ac0 RSI: 000000c420149bf0 RDI: 0000000000000011 RBP: 000000c420135e30 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 000000c426d0bef8 R13: 000000000000000f R14: 0000000000b82ca0 R15: 000000000000f48d CPU: 0 PID: 6071 Comm: syz-fuzzer Not tainted 4.20.0-rc4+ #164 rcu: INFO: rcu_preempt self-detected stall on CPU Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 rcu: 1-...!: (82 ticks this GP) idle=b6a/1/0x4000000000000004 softirq=46817/46817 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:3423 __alloc_pages_slowpath+0x2651/0x2de0 mm/page_alloc.c:4291 rcu: (t=10758 jiffies g=31457 q=26) rcu: rcu_preempt kthread starved for 10758 jiffies! g31457 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 22696 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 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+0xad8/0xea0 mm/page_alloc.c:4393 __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 rcu_gp_kthread+0x341/0xc70 kernel/rcu/tree.c:2090 alloc_skb include/linux/skbuff.h:1005 [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:3840 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 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 1 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:console_unlock+0x102f/0x1190 kernel/printk/printk.c:2418 Code: 70 fb 51 89 48 89 f8 48 c1 e8 03 42 80 3c 20 00 75 36 48 83 3d e1 77 ec 07 00 74 25 e8 5a 07 1a 00 48 8b bd b0 fe ff ff 57 9d <0f> 1f 44 00 00 e9 9a f8 ff ff 4c 89 ef e8 af 86 5d 00 e9 f2 fb ff RSP: 0000:ffff8881b62c5e40 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8881c39dc480 RBX: 0000000000000200 RCX: 1ffff1103873b9b3 RDX: 0000000000000000 RSI: ffffffff81658396 RDI: 0000000000000293 RBP: ffff8881b62c5fb0 R08: ffff8881c39dcd98 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8881c39dc480 R12: dffffc0000000000 R13: ffffffff849d2810 R14: dffffc0000000000 R15: ffffffff89b63cf0 vprintk_emit+0x391/0x990 kernel/printk/printk.c:1922 vprintk_default+0x28/0x30 kernel/printk/printk.c:1964 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1997 dump_unreclaimable_slab.cold.22+0xd8/0xe6 mm/slab_common.c:1392 dump_header+0x7cc/0xf72 mm/oom_kill.c:447 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+0x232c/0x2de0 mm/page_alloc.c:4229 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393 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: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+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: 0033:0x45ddf3 Code: Bad RIP value. RSP: 002b:000000c42001fea0 EFLAGS: 00010202 RAX: ffffffffffffff92 RBX: 000000003b97badf RCX: 000000000045ddf3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000014fadc0 RBP: 000000c42001fee8 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c42001fed8 R11: 0000000000000202 R12: 0000000000000001 R13: 000000c42a92e300 R14: 0000000000000001 R15: 0000000000000000 warn_alloc_show_mem: 1 callbacks suppressed CPU: 1 PID: 6062 Comm: syz-fuzzer Not tainted 4.20.0-rc4+ #164 Mem-Info: active_anon:53233 inactive_anon:1440 isolated_anon:0 active_file:10 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:9536 slab_unreclaimable:1451672 mapped:40962 shmem:1493 pagetables:640 bounce:0 free:13776 free_pcp:523 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:212932kB inactive_anon:5760kB active_file:40kB inactive_file:52kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:163848kB dirty:0kB writeback:0kB shmem:5972kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 194560kB 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:25224kB min:30052kB low:37564kB high:45076kB active_anon:0kB 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:13972kB min:37364kB low:46704kB high:56044kB active_anon:212932kB inactive_anon:5760kB active_file:40kB inactive_file:52kB unevictable:0kB writepending:0kB present:4718592kB managed:3587816kB mlocked:0kB kernel_stack:6880kB pagetables:2560kB bounce:0kB free_pcp:1844kB local_pcp:612kB 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: 2*4kB (M) 2*8kB (M) 3*16kB (M) 4*32kB (M) 3*64kB (UM) 2*128kB (M) 2*256kB (M) 3*512kB (UM) 4*1024kB (UM) 3*2048kB (UM) 3*4096kB (M) = 25224kB nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62 Node 0 Normal: 873*4kB (UMEH) 556*8kB (UMEH) 225*16kB (UMEH) 68*32kB (UME) 4*64kB (ME) 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13972kB 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:164 [inline] rcu_dump_cpu_stacks+0x16f/0x1bc kernel/rcu/tree.c:1195 Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB print_cpu_stall.cold.67+0x1f3/0x3c7 kernel/rcu/tree.c:1334 1516 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 check_cpu_stall kernel/rcu/tree.c:1408 [inline] rcu_pending kernel/rcu/tree.c:2961 [inline] rcu_check_callbacks+0xf3b/0x13f0 kernel/rcu/tree.c:2506 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+0x41c/0x10d0 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 15 eb 3d ff e9 28 ff ff ff e8 bc 20 c3 ff 48 83 3d 54 69 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 02 f3 RSP: 0000:ffff8881daf07450 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000480020 RCX: 1ffff1103851117d RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000282 RBP: ffff8881daf074c0 R08: ffff8881c2888be8 R09: 0000000000000002 R10: 0000000000000000 R11: ffff8881c2888280 R12: ffff8881d9beec00 R13: ffff8881d9beec00 R14: 0000000000000000 R15: 0000000000000282 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:1005 [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:3840 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_save_flags arch/x86/include/asm/paravirt.h:756 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:lock_is_held_type+0x7a/0x210 kernel/locking/lockdep.c:3878 Code: 85 c0 0f 85 46 01 00 00 48 c7 c7 68 fb 51 89 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 6c 01 00 00 <48> 83 3d b6 1e f1 07 00 0f 84 2a 01 00 00 9c 58 0f 1f 44 00 00 48 RSP: 0000:ffff8881c1b4dfd0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8881c2888280 RCX: 0000000000000000 RDX: 1ffffffff12a3f6d RSI: 00000000ffffffff RDI: ffffffff8951fb68 RBP: ffff8881c1b4dff0 R08: ffff8881c2888280 R09: ffffed103b5e5b67 R10: ffffed103b5e5b67 R11: ffff8881daf2db3b R12: 1ffff11038369c03 R13: ffffffff8959b940 R14: 0000000000000000 R15: ffffffffffffffff lock_is_held include/linux/lockdep.h:339 [inline] rcu_read_lock_held+0xa9/0xc0 kernel/rcu/update.c:281 list_lru_from_memcg_idx mm/list_lru.c:55 [inline] list_lru_count_one+0x31a/0x450 mm/list_lru.c:194 list_lru_shrink_count include/linux/list_lru.h:122 [inline] super_cache_count+0x153/0x2e0 fs/super.c:144 do_shrink_slab+0x1b1/0xd30 mm/vmscan.c:465 shrink_slab+0x389/0x8c0 mm/vmscan.c:706 shrink_node+0x431/0x16b0 mm/vmscan.c:2758 shrink_zones mm/vmscan.c:2987 [inline] do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3049 try_to_free_pages+0x4d0/0xb90 mm/vmscan.c:3264 __perform_reclaim mm/page_alloc.c:3773 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3795 [inline] __alloc_pages_slowpath+0xa48/0x2de0 mm/page_alloc.c:4185 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393 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: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+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: 0033:0x45db60 Code: Bad RIP value. RSP: 002b:000000c420149ab8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 000000c420089c00 RCX: 000000000045ddf3 RDX: 000000c420149ac0 RSI: 000000c420149bf0 RDI: 0000000000000011 RBP: 000000c420135e30 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 000000c426d0bef8 R13: 000000000000000f R14: 0000000000b82ca0 R15: 000000000000f48d CPU: 0 PID: 6071 Comm: syz-fuzzer Not tainted 4.20.0-rc4+ #164 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-fuzzer: 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-fuzzer cpuset=/ mems_allowed=0 __alloc_pages_slowpath+0x2651/0x2de0 mm/page_alloc.c:4291 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393 __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:1005 [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:3840 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:console_unlock+0x102f/0x1190 kernel/printk/printk.c:2418 Code: 70 fb 51 89 48 89 f8 48 c1 e8 03 42 80 3c 20 00 75 36 48 83 3d e1 77 ec 07 00 74 25 e8 5a 07 1a 00 48 8b bd b0 fe ff ff 57 9d <0f> 1f 44 00 00 e9 9a f8 ff ff 4c 89 ef e8 af 86 5d 00 e9 f2 fb ff RSP: 0000:ffff8881b62c5e40 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8881c39dc480 RBX: 0000000000000200 RCX: 1ffff1103873b9b3 RDX: 0000000000000000 RSI: ffffffff81658396 RDI: 0000000000000293 RBP: ffff8881b62c5fb0 R08: ffff8881c39dcd98 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8881c39dc480 R12: dffffc0000000000 R13: ffffffff849d2810 R14: dffffc0000000000 R15: ffffffff89b63cf0 vprintk_emit+0x391/0x990 kernel/printk/printk.c:1922 vprintk_default+0x28/0x30 kernel/printk/printk.c:1964 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1997 dump_unreclaimable_slab.cold.22+0xd8/0xe6 mm/slab_common.c:1392 dump_header+0x7cc/0xf72 mm/oom_kill.c:447 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+0x232c/0x2de0 mm/page_alloc.c:4229 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393 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: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+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: 0033:0x45ddf3 Code: Bad RIP value. RSP: 002b:000000c42001fea0 EFLAGS: 00010202 RAX: ffffffffffffff92 RBX: 000000003b97badf RCX: 000000000045ddf3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000014fadc0 RBP: 000000c42001fee8 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c42001fed8 R11: 0000000000000202 R12: 0000000000000001 R13: 000000c42a92e300 R14: 0000000000000001 R15: 0000000000000000 CPU: 1 PID: 6062 Comm: syz-fuzzer Not tainted 4.20.0-rc4+ #164 Mem-Info: active_anon:53233 inactive_anon:1440 isolated_anon:0 active_file:10 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:9536 slab_unreclaimable:1451672 mapped:40962 shmem:1493 pagetables:640 bounce:0 free:13776 free_pcp:523 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:212932kB inactive_anon:5760kB active_file:40kB inactive_file:52kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:163848kB dirty:0kB writeback:0kB shmem:5972kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 194560kB 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:25224kB min:30052kB low:37564kB high:45076kB active_anon:0kB 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:13972kB min:37364kB low:46704kB high:56044kB active_anon:212932kB inactive_anon:5760kB active_file:40kB inactive_file:52kB unevictable:0kB writepending:0kB present:4718592kB managed:3587816kB mlocked:0kB kernel_stack:6880kB pagetables:2560kB bounce:0kB free_pcp:1844kB local_pcp:612kB 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: 2*4kB (M) 2*8kB (M) 3*16kB (M) 4*32kB (M) 3*64kB (UM) 2*128kB (M) 2*256kB (M) 3*512kB (UM) 4*1024kB (UM) 3*2048kB (UM) 3*4096kB (M) = 25224kB Node 0 Normal: 873*4kB (UMEH) 556*8kB (UMEH) 225*16kB (UMEH) 68*32kB (UME) 4*64kB (ME) 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13972kB __alloc_pages_slowpath+0x2651/0x2de0 mm/page_alloc.c:4291 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 1516 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+0xad8/0xea0 mm/page_alloc.c:4393 __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:1005 [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:3840 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_save_flags arch/x86/include/asm/paravirt.h:756 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:lock_is_held_type+0x7a/0x210 kernel/locking/lockdep.c:3878 Code: 85 c0 0f 85 46 01 00 00 48 c7 c7 68 fb 51 89 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 6c 01 00 00 <48> 83 3d b6 1e f1 07 00 0f 84 2a 01 00 00 9c 58 0f 1f 44 00 00 48 RSP: 0000:ffff8881c1b4dfd0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8881c2888280 RCX: 0000000000000000 RDX: 1ffffffff12a3f6d RSI: 00000000ffffffff RDI: ffffffff8951fb68 RBP: ffff8881c1b4dff0 R08: ffff8881c2888280 R09: ffffed103b5e5b67 R10: ffffed103b5e5b67 R11: ffff8881daf2db3b R12: 1ffff11038369c03 R13: ffffffff8959b940 R14: 0000000000000000 R15: ffffffffffffffff lock_is_held include/linux/lockdep.h:339 [inline] rcu_read_lock_held+0xa9/0xc0 kernel/rcu/update.c:281 list_lru_from_memcg_idx mm/list_lru.c:55 [inline] list_lru_count_one+0x31a/0x450 mm/list_lru.c:194 list_lru_shrink_count include/linux/list_lru.h:122 [inline] super_cache_count+0x153/0x2e0 fs/super.c:144 do_shrink_slab+0x1b1/0xd30 mm/vmscan.c:465 shrink_slab+0x389/0x8c0 mm/vmscan.c:706 shrink_node+0x431/0x16b0 mm/vmscan.c:2758 shrink_zones mm/vmscan.c:2987 [inline] do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3049 try_to_free_pages+0x4d0/0xb90 mm/vmscan.c:3264 __perform_reclaim mm/page_alloc.c:3773 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3795 [inline] __alloc_pages_slowpath+0xa48/0x2de0 mm/page_alloc.c:4185 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393 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: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+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: 0033:0x45db60 Code: Bad RIP value. RSP: 002b:000000c420149ab8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 000000c420089c00 RCX: 000000000045ddf3 RDX: 000000c420149ac0 RSI: 000000c420149bf0 RDI: 0000000000000011 RBP: 000000c420135e30 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 000000c426d0bef8 R13: 000000000000000f R14: 0000000000b82ca0 R15: 000000000000f48d CPU: 0 PID: 6071 Comm: syz-fuzzer Not tainted 4.20.0-rc4+ #164 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 warn_alloc.cold.116+0xb7/0x1bd mm/page_alloc.c:3423 syz-fuzzer: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-fuzzer cpuset=/ mems_allowed=0 __alloc_pages_slowpath+0x2651/0x2de0 mm/page_alloc.c:4291 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393 __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:1005 [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:3840 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:console_unlock+0x102f/0x1190 kernel/printk/printk.c:2418 Code: 70 fb 51 89 48 89 f8 48 c1 e8 03 42 80 3c 20 00 75 36 48 83 3d e1 77 ec 07 00 74 25 e8 5a 07 1a 00 48 8b bd b0 fe ff ff 57 9d <0f> 1f 44 00 00 e9 9a f8 ff ff 4c 89 ef e8 af 86 5d 00 e9 f2 fb ff RSP: 0000:ffff8881b62c5e40 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8881c39dc480 RBX: 0000000000000200 RCX: 1ffff1103873b9b3 RDX: 0000000000000000 RSI: ffffffff81658396 RDI: 0000000000000293 RBP: ffff8881b62c5fb0 R08: ffff8881c39dcd98 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8881c39dc480 R12: dffffc0000000000 R13: ffffffff849d2810 R14: dffffc0000000000 R15: ffffffff89b63cf0 vprintk_emit+0x391/0x990 kernel/printk/printk.c:1922 vprintk_default+0x28/0x30 kernel/printk/printk.c:1964 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1997 dump_unreclaimable_slab.cold.22+0xd8/0xe6 mm/slab_common.c:1392 dump_header+0x7cc/0xf72 mm/oom_kill.c:447 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+0x232c/0x2de0 mm/page_alloc.c:4229 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393 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: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+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: 0033:0x45ddf3 Code: Bad RIP value. RSP: 002b:000000c42001fea0 EFLAGS: 00010202 RAX: ffffffffffffff92 RBX: 000000003b97badf RCX: 000000000045ddf3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000014fadc0 RBP: 000000c42001fee8 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c42001fed8 R11: 0000000000000202 R12: 0000000000000001 R13: 000000c42a92e300 R14: 0000000000000001 R15: 0000000000000000 warn_alloc_show_mem: 1 callbacks suppressed CPU: 1 PID: 6062 Comm: syz-fuzzer Not tainted 4.20.0-rc4+ #164 Mem-Info: active_anon:53233 inactive_anon:1440 isolated_anon:0 active_file:10 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:9536 slab_unreclaimable:1451672 mapped:40962 shmem:1493 pagetables:640 bounce:0 free:13776 free_pcp:523 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:212932kB inactive_anon:5760kB active_file:40kB inactive_file:52kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:163848kB dirty:0kB writeback:0kB shmem:5972kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 194560kB 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:25224kB min:30052kB low:37564kB high:45076kB active_anon:0kB 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:13972kB min:37364kB low:46704kB high:56044kB active_anon:212932kB inactive_anon:5760kB active_file:40kB inactive_file:52kB unevictable:0kB writepending:0kB present:4718592kB managed:3587816kB mlocked:0kB kernel_stack:6880kB pagetables:2560kB bounce:0kB free_pcp:1844kB local_pcp:612kB 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: 2*4kB (M) 2*8kB (M) 3*16kB (M) 4*32kB (M) 3*64kB (UM) 2*128kB (M) 2*256kB (M) 3*512kB (UM) 4*1024kB (UM) 3*2048kB (UM) 3*4096kB (M) = 25224kB Node 0 Normal: 873*4kB (UMEH) 556*8kB (UMEH) 225*16kB (UMEH) 68*32kB (UME) 4*64kB (ME) 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13972kB __alloc_pages_slowpath+0x2651/0x2de0 mm/page_alloc.c:4291 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 1516 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+0xad8/0xea0 mm/page_alloc.c:4393 __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:1005 [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:3840 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_save_flags arch/x86/include/asm/paravirt.h:756 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:lock_is_held_type+0x7a/0x210 kernel/locking/lockdep.c:3878 Code: 85 c0 0f 85 46 01 00 00 48 c7 c7 68 fb 51 89 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 6c 01 00 00 <48> 83 3d b6 1e f1 07 00 0f 84 2a 01 00 00 9c 58 0f 1f 44 00 00 48 RSP: 0000:ffff8881c1b4dfd0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8881c2888280 RCX: 0000000000000000 RDX: 1ffffffff12a3f6d RSI: 00000000ffffffff RDI: ffffffff8951fb68 RBP: ffff8881c1b4dff0 R08: ffff8881c2888280 R09: ffffed103b5e5b67 R10: ffffed103b5e5b67 R11: ffff8881daf2db3b R12: 1ffff11038369c03 R13: ffffffff8959b940 R14: 0000000000000000 R15: ffffffffffffffff lock_is_held include/linux/lockdep.h:339 [inline] rcu_read_lock_held+0xa9/0xc0 kernel/rcu/update.c:281 list_lru_from_memcg_idx mm/list_lru.c:55 [inline] list_lru_count_one+0x31a/0x450 mm/list_lru.c:194 list_lru_shrink_count include/linux/list_lru.h:122 [inline] super_cache_count+0x153/0x2e0 fs/super.c:144 do_shrink_slab+0x1b1/0xd30 mm/vmscan.c:465 shrink_slab+0x389/0x8c0 mm/vmscan.c:706 shrink_node+0x431/0x16b0 mm/vmscan.c:2758 shrink_zones mm/vmscan.c:2987 [inline] do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3049 try_to_free_pages+0x4d0/0xb90 mm/vmscan.c:3264 __perform_reclaim mm/page_alloc.c:3773 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3795 [inline] __alloc_pages_slowpath+0xa48/0x2de0 mm/page_alloc.c:4185 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393 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: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+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: 0033:0x45db60 Code: Bad RIP value. RSP: 002b:000000c420149ab8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 000000c420089c00 RCX: 000000000045ddf3 RDX: 000000c420149ac0 RSI: 000000c420149bf0 RDI: 0000000000000011 RBP: 000000c420135e30 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 000000c426d0bef8 R13: 000000000000000f R14: 0000000000b82ca0 R15: 000000000000f48d CPU: 0 PID: 6071 Comm: syz-fuzzer Not tainted 4.20.0-rc4+ #164 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-fuzzer: 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-fuzzer cpuset=/ mems_allowed=0 __alloc_pages_slowpath+0x2651/0x2de0 mm/page_alloc.c:4291 __alloc_pages_nodemask+0xad8/0xea0 mm/page_alloc.c:4393 __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