run_ksoftirqd+0x94/0x100 kernel/softirq.c:653 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 CPU: 1 PID: 5364 Comm: syz-executor6 Not tainted 4.19.0-rc2+ #51 rcu: INFO: rcu_preempt self-detected stall on CPU Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: rcu: 0-...!: (1 GPs behind) idle=6da/1/0x4000000000000002 softirq=12459/12460 fqs=2 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 warn_alloc.cold.118+0xb7/0x1bd mm/page_alloc.c:3426 __alloc_pages_slowpath+0x2667/0x2d80 mm/page_alloc.c:4297 rcu: (t=10510 jiffies g=14965 q=38) rcu: rcu_preempt kthread starved for 10170 jiffies! g14965 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 23064 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4390 schedule_timeout+0x140/0x260 kernel/time/timer.c:1804 rcu_gp_kthread+0x9d9/0x2310 kernel/rcu/tree.c:2194 __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+0x91/0x8c0 mm/slab.c:2677 fallback_alloc+0x203/0x2e0 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:995 [inline] ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x3c0/0x6f0 net/ipv6/addrconf.c:3819 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+0x30b/0xad8 kernel/softirq.c:292 kthread+0x35a/0x420 kernel/kthread.c:246 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1056 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 NMI backtrace for cpu 0 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline] RIP: 0010:console_unlock+0x1017/0x11a0 kernel/printk/printk.c:2411 Code: c1 e8 03 42 80 3c 20 00 0f 85 8d 01 00 00 48 83 3d 25 98 ed 07 00 0f 84 78 01 00 00 e8 a2 3d 1a 00 48 8b bd c0 fe ff ff 57 9d <0f> 1f 44 00 00 e9 68 f9 ff ff e8 ba a0 5d 00 e9 08 f4 ff ff e8 80 RSP: 0000:ffff8801a56146d0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a560e400 RBX: 0000000000000200 RCX: 1ffff10034ac1d99 RDX: 0000000000000000 RSI: ffffffff8164918e RDI: 0000000000000293 RBP: ffff8801a5614830 R08: ffff8801a560ecc8 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801a560e400 R12: dffffc0000000000 R13: ffffffff848d86c0 R14: ffffffff89b9bd50 R15: dffffc0000000000 vprintk_emit+0x33d/0x930 kernel/printk/printk.c:1926 vprintk_default+0x28/0x30 kernel/printk/printk.c:1967 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:2000 show_free_areas.cold.119+0x1f75/0x215d mm/page_alloc.c:5033 show_mem+0x34/0x17b lib/show_mem.c:18 dump_header+0x2f1/0xf72 mm/oom_kill.c:445 oom_kill_process.cold.27+0x10/0x903 mm/oom_kill.c:952 out_of_memory+0xa86/0x14c0 mm/oom_kill.c:1112 __alloc_pages_may_oom mm/page_alloc.c:3522 [inline] __alloc_pages_slowpath+0x2318/0x2d80 mm/page_alloc.c:4235 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4390 __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+0x91/0x8c0 mm/slab.c:2677 fallback_alloc+0x203/0x2e0 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_trace+0xe7/0x740 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.39+0x41/0xe0 net/core/skbuff.c:137 __alloc_skb+0x155/0x770 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] nlmsg_new include/net/netlink.h:511 [inline] rtmsg_ifinfo_build_skb+0x74/0x190 net/core/rtnetlink.c:3314 rtmsg_ifinfo_event.part.31+0x45/0xe0 net/core/rtnetlink.c:3350 rtmsg_ifinfo_event net/core/rtnetlink.c:3361 [inline] rtmsg_ifinfo+0x8c/0xa0 net/core/rtnetlink.c:3359 dev_close_many+0x3be/0x860 net/core/dev.c:1502 rollback_registered_many+0x56e/0x1240 net/core/dev.c:7929 rollback_registered+0x1e9/0x420 net/core/dev.c:7994 unregister_netdevice_queue+0x321/0x5e0 net/core/dev.c:9038 unregister_netdevice include/linux/netdevice.h:2589 [inline] __tun_detach+0x11b8/0x15c0 drivers/net/tun.c:729 tun_detach drivers/net/tun.c:746 [inline] tun_chr_close+0xe3/0x180 drivers/net/tun.c:3272 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1ad7/0x2610 kernel/exit.c:867 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8b0/0x1980 kernel/signal.c:2513 do_signal+0x9c/0x21e0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410bd0 Code: Bad RIP value. RSP: 002b:00007ffec2365438 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000410bd0 RDX: 0000000000000038 RSI: 0000000000930060 RDI: 00000000000000f9 RBP: 0000000000000003 R08: 00000000000003b8 R09: 0000000000004000 R10: 0000000000709640 R11: 0000000000000246 R12: 0000000000000015 R13: 000000000001e3d2 R14: 000000000000002a R15: badc0ffeebadface warn_alloc_show_mem: 1 callbacks suppressed CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.0-rc2+ #51 Mem-Info: active_anon:39050 inactive_anon:372 isolated_anon:0 active_file:14 inactive_file:19 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:8799 slab_unreclaimable:1479021 mapped:16562 shmem:379 pagetables:441 bounce:0 free:13755 free_pcp:486 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:156200kB inactive_anon:1488kB active_file:56kB inactive_file:76kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:66248kB dirty:0kB writeback:0kB shmem:1516kB 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+0x1c4/0x2b4 lib/dump_stack.c:113 lowmem_reserve[]: 0 2817 6321 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101 6321 Node 0 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed lib/nmi_backtrace.c:62 DMA32 free:25280kB min:30048kB low:37560kB high:45072kB active_anon:2048kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2889304kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:248kB local_pcp:248kB free_cma:0kB arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 lowmem_reserve[]: trigger_single_cpu_backtrace include/linux/nmi.h:162 [inline] rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1340 0 0 3503 print_cpu_stall.cold.78+0x2d3/0x524 kernel/rcu/tree.c:1478 3503 Node 0 Normal free:13832kB min:37364kB low:46704kB high:56044kB active_anon:154152kB inactive_anon:1488kB active_file:56kB inactive_file:76kB unevictable:0kB writepending:0kB present:4718592kB managed:3587728kB mlocked:0kB kernel_stack:5408kB pagetables:1764kB bounce:0kB free_pcp:1696kB local_pcp:1412kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB (U) check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3276 [inline] rcu_pending kernel/rcu/tree.c:3319 [inline] rcu_check_callbacks+0xfd9/0x1990 kernel/rcu/tree.c:2665 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) 1*8kB (U) 3*16kB (M) 2*32kB (UM) 3*64kB (UM) 3*128kB (M) 2*256kB (M) 3*512kB update_process_times+0x2d/0x70 kernel/time/timer.c:1636 (M) tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164 4*1024kB tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 (UM) __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460 1*2048kB (M) 4*4096kB (M) = 25280kB Node 0 Normal: 952*4kB (ME) 421*8kB (ME) 182*16kB (UME) hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518 57*32kB local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1029 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1054 (UME) 14*64kB (M) 0*128kB 0*256kB 0*512kB 1*1024kB (U) 0*2048kB 0*4096kB = 13832kB 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 412 total pagecache pages 0 pages in swap cache apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864 Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline] RIP: 0010:slab_alloc_node mm/slab.c:3329 [inline] RIP: 0010:kmem_cache_alloc_node+0x247/0x730 mm/slab.c:3642 1965979 pages RAM Code: 40 7e 0f 85 32 ff ff ff e8 a5 c3 3e ff e9 28 ff ff ff e8 bc 20 c3 ff 48 83 3d 5c 6f 90 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 9a 42 0 pages HighMem/MovableOnly 342744 pages reserved RSP: 0000:ffff8801d9aaf3a0 EFLAGS: 00000282 0 pages cma reserved ORIG_RAX: ffffffffffffff13 ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb RAX: 0000000000000000 RBX: 0000000000480020 RCX: 1ffff1003b35415c RDX: 0000000000000000 RSI: ffff8801d9aa0ae8 RDI: 0000000000000282 syz-executor6: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) RBP: ffff8801d9aaf410 R08: ffff8801d9aa0ae0 R09: 0000000000000002 syz-executor6 cpuset= R10: 0000000000000000 R11: ffff8801d9aa0240 R12: ffff8801d9be7680 syz6 R13: ffff8801d9be7680 R14: 0000000000000000 R15: 0000000000000282 mems_allowed=0 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] new_skb+0x26/0x1c0 drivers/block/aoe/aoecmd.c:67 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:426 [inline] aoecmd_cfg+0x279/0x7f0 drivers/block/aoe/aoecmd.c:1374 discover_timer+0x50/0x60 drivers/block/aoe/aoemain.c:24 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+0x30b/0xad8 kernel/softirq.c:292 run_ksoftirqd+0x94/0x100 kernel/softirq.c:653 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 CPU: 1 PID: 5364 Comm: syz-executor6 Not tainted 4.19.0-rc2+ #51 aoe: skb alloc failure 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+0x1c4/0x2b4 lib/dump_stack.c:113 warn_alloc.cold.118+0xb7/0x1bd mm/page_alloc.c:3426 ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) ksoftirqd/0 cpuset= / mems_allowed=0 __alloc_pages_slowpath+0x2667/0x2d80 mm/page_alloc.c:4297 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4390 __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+0x91/0x8c0 mm/slab.c:2677 fallback_alloc+0x203/0x2e0 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:995 [inline] ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x3c0/0x6f0 net/ipv6/addrconf.c:3819 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+0x30b/0xad8 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline] RIP: 0010:console_unlock+0x1017/0x11a0 kernel/printk/printk.c:2411 Code: c1 e8 03 42 80 3c 20 00 0f 85 8d 01 00 00 48 83 3d 25 98 ed 07 00 0f 84 78 01 00 00 e8 a2 3d 1a 00 48 8b bd c0 fe ff ff 57 9d <0f> 1f 44 00 00 e9 68 f9 ff ff e8 ba a0 5d 00 e9 08 f4 ff ff e8 80 RSP: 0000:ffff8801a56146d0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a560e400 RBX: 0000000000000200 RCX: 1ffff10034ac1d99 RDX: 0000000000000000 RSI: ffffffff8164918e RDI: 0000000000000293 RBP: ffff8801a5614830 R08: ffff8801a560ecc8 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801a560e400 R12: dffffc0000000000 R13: ffffffff848d86c0 R14: ffffffff89b9bd50 R15: dffffc0000000000 vprintk_emit+0x33d/0x930 kernel/printk/printk.c:1926 vprintk_default+0x28/0x30 kernel/printk/printk.c:1967 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:2000 show_free_areas.cold.119+0x1f75/0x215d mm/page_alloc.c:5033 show_mem+0x34/0x17b lib/show_mem.c:18 dump_header+0x2f1/0xf72 mm/oom_kill.c:445 oom_kill_process.cold.27+0x10/0x903 mm/oom_kill.c:952 out_of_memory+0xa86/0x14c0 mm/oom_kill.c:1112 __alloc_pages_may_oom mm/page_alloc.c:3522 [inline] __alloc_pages_slowpath+0x2318/0x2d80 mm/page_alloc.c:4235 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4390 __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+0x91/0x8c0 mm/slab.c:2677 fallback_alloc+0x203/0x2e0 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_trace+0xe7/0x740 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.39+0x41/0xe0 net/core/skbuff.c:137 __alloc_skb+0x155/0x770 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] nlmsg_new include/net/netlink.h:511 [inline] rtmsg_ifinfo_build_skb+0x74/0x190 net/core/rtnetlink.c:3314 rtmsg_ifinfo_event.part.31+0x45/0xe0 net/core/rtnetlink.c:3350 rtmsg_ifinfo_event net/core/rtnetlink.c:3361 [inline] rtmsg_ifinfo+0x8c/0xa0 net/core/rtnetlink.c:3359 dev_close_many+0x3be/0x860 net/core/dev.c:1502 rollback_registered_many+0x56e/0x1240 net/core/dev.c:7929 rollback_registered+0x1e9/0x420 net/core/dev.c:7994 unregister_netdevice_queue+0x321/0x5e0 net/core/dev.c:9038 unregister_netdevice include/linux/netdevice.h:2589 [inline] __tun_detach+0x11b8/0x15c0 drivers/net/tun.c:729 tun_detach drivers/net/tun.c:746 [inline] tun_chr_close+0xe3/0x180 drivers/net/tun.c:3272 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1ad7/0x2610 kernel/exit.c:867 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8b0/0x1980 kernel/signal.c:2513 do_signal+0x9c/0x21e0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410bd0 Code: Bad RIP value. RSP: 002b:00007ffec2365438 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000410bd0 RDX: 0000000000000038 RSI: 0000000000930060 RDI: 00000000000000f9 RBP: 0000000000000003 R08: 00000000000003b8 R09: 0000000000004000 R10: 0000000000709640 R11: 0000000000000246 R12: 0000000000000015 R13: 000000000001e3d2 R14: 000000000000002a R15: badc0ffeebadface Mem-Info: CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.0-rc2+ #51 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 active_anon:39050 inactive_anon:372 isolated_anon:0 active_file:14 inactive_file:19 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:8799 slab_unreclaimable:1479021 mapped:16562 shmem:379 pagetables:441 bounce:0 free:13755 free_pcp:486 free_cma:0 Call Trace: Node 0 active_anon:156200kB inactive_anon:1488kB active_file:56kB inactive_file:76kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:66248kB dirty:0kB writeback:0kB shmem:1516kB 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+0x1c4/0x2b4 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 warn_alloc.cold.118+0xb7/0x1bd mm/page_alloc.c:3426 lowmem_reserve[]: 0 2817 6321 6321 __alloc_pages_slowpath+0x2667/0x2d80 mm/page_alloc.c:4297 Node 0 DMA32 free:25280kB min:30048kB low:37560kB high:45072kB active_anon:2048kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2889304kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:248kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:13832kB min:37364kB low:46704kB high:56044kB active_anon:154152kB inactive_anon:1488kB active_file:56kB inactive_file:76kB unevictable:0kB writepending:0kB present:4718592kB managed:3587728kB mlocked:0kB kernel_stack:5408kB pagetables:1764kB bounce:0kB free_pcp:1696kB local_pcp:1412kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4390 (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB __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+0x91/0x8c0 mm/slab.c:2677 (U) 1*2048kB fallback_alloc+0x203/0x2e0 mm/slab.c:3219 (M) ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 3*4096kB slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0xe3/0x730 mm/slab.c:3642 (M) = 15908kB Node 0 __alloc_skb+0x119/0x770 net/core/skbuff.c:193 DMA32: 2*4kB (M) 1*8kB (U) 3*16kB (M) 2*32kB alloc_skb include/linux/skbuff.h:995 [inline] new_skb+0x26/0x1c0 drivers/block/aoe/aoecmd.c:67 (UM) aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:426 [inline] aoecmd_cfg+0x279/0x7f0 drivers/block/aoe/aoecmd.c:1374 3*64kB (UM) 3*128kB (M) 2*256kB (M) discover_timer+0x50/0x60 drivers/block/aoe/aoemain.c:24 3*512kB (M) call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 4*1024kB (UM) 1*2048kB (M) 4*4096kB (M) = 25280kB Node 0 Normal: 952*4kB (ME) 421*8kB (ME) 182*16kB expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 (UME) 57*32kB (UME) 14*64kB (M) 0*128kB 0*256kB 0*512kB 1*1024kB (U) 0*2048kB 0*4096kB = 13832kB 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 412 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 1965979 pages RAM 0 pages HighMem/MovableOnly __do_softirq+0x30b/0xad8 kernel/softirq.c:292 342744 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb syz-executor6: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-executor6 cpuset= syz6 mems_allowed=0 run_ksoftirqd+0x94/0x100 kernel/softirq.c:653 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 CPU: 1 PID: 5364 Comm: syz-executor6 Not tainted 4.19.0-rc2+ #51 aoe: skb alloc failure Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) ksoftirqd/0 cpuset= __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 / mems_allowed=0 warn_alloc.cold.118+0xb7/0x1bd mm/page_alloc.c:3426 __alloc_pages_slowpath+0x2667/0x2d80 mm/page_alloc.c:4297 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4390 __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+0x91/0x8c0 mm/slab.c:2677 fallback_alloc+0x203/0x2e0 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:995 [inline] ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x3c0/0x6f0 net/ipv6/addrconf.c:3819 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+0x30b/0xad8 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline] RIP: 0010:console_unlock+0x1017/0x11a0 kernel/printk/printk.c:2411 Code: c1 e8 03 42 80 3c 20 00 0f 85 8d 01 00 00 48 83 3d 25 98 ed 07 00 0f 84 78 01 00 00 e8 a2 3d 1a 00 48 8b bd c0 fe ff ff 57 9d <0f> 1f 44 00 00 e9 68 f9 ff ff e8 ba a0 5d 00 e9 08 f4 ff ff e8 80 RSP: 0000:ffff8801a56146d0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a560e400 RBX: 0000000000000200 RCX: 1ffff10034ac1d99 RDX: 0000000000000000 RSI: ffffffff8164918e RDI: 0000000000000293 RBP: ffff8801a5614830 R08: ffff8801a560ecc8 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801a560e400 R12: dffffc0000000000 R13: ffffffff848d86c0 R14: ffffffff89b9bd50 R15: dffffc0000000000 vprintk_emit+0x33d/0x930 kernel/printk/printk.c:1926 vprintk_default+0x28/0x30 kernel/printk/printk.c:1967 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:2000 show_free_areas.cold.119+0x1f75/0x215d mm/page_alloc.c:5033 show_mem+0x34/0x17b lib/show_mem.c:18 dump_header+0x2f1/0xf72 mm/oom_kill.c:445 oom_kill_process.cold.27+0x10/0x903 mm/oom_kill.c:952 out_of_memory+0xa86/0x14c0 mm/oom_kill.c:1112 __alloc_pages_may_oom mm/page_alloc.c:3522 [inline] __alloc_pages_slowpath+0x2318/0x2d80 mm/page_alloc.c:4235 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4390 __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+0x91/0x8c0 mm/slab.c:2677 fallback_alloc+0x203/0x2e0 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_trace+0xe7/0x740 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.39+0x41/0xe0 net/core/skbuff.c:137 __alloc_skb+0x155/0x770 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] nlmsg_new include/net/netlink.h:511 [inline] rtmsg_ifinfo_build_skb+0x74/0x190 net/core/rtnetlink.c:3314 rtmsg_ifinfo_event.part.31+0x45/0xe0 net/core/rtnetlink.c:3350 rtmsg_ifinfo_event net/core/rtnetlink.c:3361 [inline] rtmsg_ifinfo+0x8c/0xa0 net/core/rtnetlink.c:3359 dev_close_many+0x3be/0x860 net/core/dev.c:1502 rollback_registered_many+0x56e/0x1240 net/core/dev.c:7929 rollback_registered+0x1e9/0x420 net/core/dev.c:7994 unregister_netdevice_queue+0x321/0x5e0 net/core/dev.c:9038 unregister_netdevice include/linux/netdevice.h:2589 [inline] __tun_detach+0x11b8/0x15c0 drivers/net/tun.c:729 tun_detach drivers/net/tun.c:746 [inline] tun_chr_close+0xe3/0x180 drivers/net/tun.c:3272 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1ad7/0x2610 kernel/exit.c:867 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8b0/0x1980 kernel/signal.c:2513 do_signal+0x9c/0x21e0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410bd0 Code: Bad RIP value. RSP: 002b:00007ffec2365438 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000410bd0 RDX: 0000000000000038 RSI: 0000000000930060 RDI: 00000000000000f9 RBP: 0000000000000003 R08: 00000000000003b8 R09: 0000000000004000 R10: 0000000000709640 R11: 0000000000000246 R12: 0000000000000015 R13: 000000000001e3d2 R14: 000000000000002a R15: badc0ffeebadface warn_alloc_show_mem: 1 callbacks suppressed CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.0-rc2+ #51 Mem-Info: active_anon:39050 inactive_anon:372 isolated_anon:0 active_file:14 inactive_file:19 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:8799 slab_unreclaimable:1479021 mapped:16562 shmem:379 pagetables:441 bounce:0 free:13755 free_pcp:486 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Node 0 active_anon:156200kB inactive_anon:1488kB active_file:56kB inactive_file:76kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:66248kB dirty:0kB writeback:0kB shmem:1516kB 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+0x1c4/0x2b4 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 warn_alloc.cold.118+0xb7/0x1bd mm/page_alloc.c:3426 lowmem_reserve[]: 0 2817 6321 6321 Node 0 __alloc_pages_slowpath+0x2667/0x2d80 mm/page_alloc.c:4297 DMA32 free:25280kB min:30048kB low:37560kB high:45072kB active_anon:2048kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2889304kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:248kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 3503 3503 Node 0 Normal free:13832kB min:37364kB low:46704kB high:56044kB active_anon:154152kB inactive_anon:1488kB active_file:56kB inactive_file:76kB unevictable:0kB writepending:0kB present:4718592kB managed:3587728kB mlocked:0kB kernel_stack:5408kB pagetables:1764kB bounce:0kB free_pcp:1696kB local_pcp:1412kB 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) __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4390 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) __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+0x91/0x8c0 mm/slab.c:2677 = 15908kB Node 0 fallback_alloc+0x203/0x2e0 mm/slab.c:3219 DMA32: ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287 2*4kB slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node+0xe3/0x730 mm/slab.c:3642 (M) 1*8kB (U) __alloc_skb+0x119/0x770 net/core/skbuff.c:193 3*16kB (M) 2*32kB (UM) 3*64kB (UM) 3*128kB (M) alloc_skb include/linux/skbuff.h:995 [inline] new_skb+0x26/0x1c0 drivers/block/aoe/aoecmd.c:67 2*256kB aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:426 [inline] aoecmd_cfg+0x279/0x7f0 drivers/block/aoe/aoecmd.c:1374 (M) 3*512kB (M) 4*1024kB (UM) 1*2048kB discover_timer+0x50/0x60 drivers/block/aoe/aoemain.c:24 (M) call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 4*4096kB (M) = 25280kB Node 0 Normal: 952*4kB (ME) 421*8kB (ME) 182*16kB (UME) 57*32kB (UME) 14*64kB (M) expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 0*128kB 0*256kB 0*512kB 1*1024kB (U) 0*2048kB 0*4096kB = 13832kB 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 412 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 342744 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x30b/0xad8 kernel/softirq.c:292 syz-executor6: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) syz-executor6 cpuset= syz6 mems_allowed=0 run_ksoftirqd+0x94/0x100 kernel/softirq.c:653 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 CPU: 1 PID: 5364 Comm: syz-executor6 Not tainted 4.19.0-rc2+ #51 aoe: skb alloc failure 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+0x1c4/0x2b4 lib/dump_stack.c:113 warn_alloc.cold.118+0xb7/0x1bd mm/page_alloc.c:3426 ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) ksoftirqd/0 cpuset= / mems_allowed=0 __alloc_pages_slowpath+0x2667/0x2d80 mm/page_alloc.c:4297 __alloc_pages_nodemask+0xa80/0xde0 mm/page_alloc.c:4390 __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+0x91/0x8c0 mm/slab.c:2677 fallback_alloc+0x203/0x2e0 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:995 [inline] ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x3c0/0x6f0 net/ipv6/addrconf.c:3819 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+0x30b/0xad8 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline] RIP: 0010:console_unlock+0x1017/0x11a0 kernel/printk/printk.c:2411 Code: c1 e8 03 42 80 3c 20 00 0f 85 8d 01 00 00 48 83 3d 25 98 ed 07 00 0f 84 78 01 00 00 e8 a2 3d 1a 00 48 8b bd c0 fe ff ff 57 9d <0f> 1f 44 00 00 e9 68 f9 ff ff e8 ba a0 5d 00 e9 08 f4 ff ff e8 80 RSP: 0000:ffff8801a56146d0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a560e400 RBX: 0000000000000200 RCX: 1ffff10034ac1d99 RDX: 0000000000000000 RSI: ffffffff8164918e RDI: 0000000000000293 RBP: ffff8801a5614830 R08: ffff8801a560ecc8 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801a560e400 R12: dffffc0000000000 R13: ffffffff848d86c0 R14: ffffffff89b9bd50 R15: dffffc0000000000 vprintk_emit+0x33d/0x930 kernel/printk/printk.c:1926 vprintk_default+0x28/0x30 kernel/printk/printk.c:1967 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:2000 show_free_areas.cold.119+0x1f75/0x215d mm/page_alloc.c:5033