RDX: 0000000000001fa0 RSI: 00007f32b1ee8da0 RDI: 0000000000000004 RBP: 00005630190519d0 R08: 0000000000000000 R09: 0000000000000000 R10: 2ce33e6c02ce33e7 R11: 0000000000000293 R12: 00007f32b1ee8da0 R13: 0000000000001fa0 R14: 0000000000001f9f R15: 00007f32b1ee8e20 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0 rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: rcu: (detected by 1, t=10502 jiffies, g=361853, q=31) __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 rcu: All QSes seen, last rcu_preempt kthread activity 10264 (4295143838-4295133574), jiffies_till_next_fqs=1, root ->qsmask 0x0 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 in:imklog R running task 26184 7846 1 0x8000000a Call Trace: sched_show_task.cold+0x332/0x396 kernel/sched/core.c:5337 print_other_cpu_stall kernel/rcu/tree.c:1430 [inline] check_cpu_stall kernel/rcu/tree.c:1557 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0xb37/0xe19 kernel/rcu/tree.c:2682 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 update_process_times+0x2a/0x70 kernel/time/timer.c:1650 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1465 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1527 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:slab_alloc_node mm/slab.c:3334 [inline] RIP: 0010:kmem_cache_alloc_node+0x2ee/0x3b0 mm/slab.c:3647 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 Code: fe ff ff 48 f7 04 24 00 02 00 00 0f 84 1f fe ff ff e8 86 9e cf ff 48 83 3d c6 77 59 08 00 0f 84 aa 00 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 e9 1a fe ff ff 65 ff 05 71 d4 69 7e 48 8b 05 e2 f0 RSP: 0000:ffff8880ba107b68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 RAX: 0000000000000007 RBX: 0000000000480020 RCX: 1ffff11011ed89dc RDX: 0000000000000000 RSI: ffff88808f6c4ec0 RDI: 0000000000000286 RBP: ffff8880b5b91d80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff R13: 0000000000000000 R14: 0000000000480020 R15: ffff8880b5b91d80 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 __do_softirq+0x265/0x980 kernel/softirq.c:292 run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 kthread+0x33f/0x460 kernel/kthread.c:259 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 warn_alloc_show_mem: 1 callbacks suppressed Mem-Info: active_anon:175849 inactive_anon:24736 isolated_anon:0 active_file:13 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:18482 slab_unreclaimable:1431264 mapped:23476 shmem:28251 pagetables:984 bounce:0 free:11077 free_pcp:541 free_cma:0 Node 0 active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:93904kB dirty:0kB writeback:0kB shmem:113004kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 139264kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes __do_softirq+0x265/0x980 kernel/softirq.c:292 Node 1 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 Node 0 DMA free:10860kB min:204kB low:252kB high:300kB 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 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 lowmem_reserve[]: 0 2693 2695 2695 2695 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 Node 0 DMA32 free:13256kB min:35996kB low:44992kB high:53988kB active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB writepending:0kB present:3129332kB managed:2763452kB mlocked:0kB kernel_stack:7680kB pagetables:3936kB bounce:0kB free_pcp:488kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 1 1 1 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:101 Node 0 Normal free:8kB min:24kB low:28kB high:32kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:2000kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 lowmem_reserve[]: 0 0 0 0 0 RSP: 0000:ffff8880a16df210 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 Node 1 Normal free:20184kB min:53876kB low:67344kB high:80812kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:4194304kB managed:4128248kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1676kB local_pcp:248kB free_cma:0kB RAX: ffff88808f6c45c0 RBX: ffff8880af23e3c0 RCX: 1ffff11011ed89d8 lowmem_reserve[]: 0 0 0 0 0 RDX: 0000000000000000 RSI: ffffffff8189c311 RDI: ffff88808f6c4930 RBP: ffff8880b59f68c0 R08: 0000000000000000 R09: 0000000000000003 Node 0 DMA: 7*4kB (U) 0*8kB 1*16kB (U) 0*32kB 1*64kB (U) 0*128kB 0*256kB 1*512kB (U) 0*1024kB 1*2048kB (M) 2*4096kB (M) = 10860kB R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882389cca80 Node 0 DMA32: 1612*4kB (UME) 533*8kB (UMEH) 129*16kB (UME) 5*32kB (UMH) 1*64kB (H) 0*128kB 1*256kB (H) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13256kB R13: ffff8880a16df358 R14: ffff8880a16df35c R15: ffff8880b59f68c0 Node 0 Normal: 0*4kB 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 8kB Node 1 Normal: 10*4kB (ME) 6*8kB (UME) 4*16kB (M) 4*32kB (UM) 3*64kB (ME) 0*128kB 3*256kB (UME) 1*512kB (M) 2*1024kB (UM) 0*2048kB 4*4096kB (M) = 20184kB rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] list_lru_count_one+0x41/0x360 mm/list_lru.c:189 Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB list_lru_shrink_count include/linux/list_lru.h:123 [inline] super_cache_count+0x1b4/0x2e0 fs/super.c:145 Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB do_shrink_slab+0x10b/0xa40 mm/vmscan.c:464 28277 total pagecache pages shrink_slab+0x16f/0x550 mm/vmscan.c:693 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB shrink_node.isra.0+0x2d3/0x1300 mm/vmscan.c:2748 Total swap = 0kB 2097051 pages RAM 0 pages HighMem/MovableOnly 369649 pages reserved 0 pages cma reserved shrink_zones mm/vmscan.c:2977 [inline] do_try_to_free_pages+0x38e/0xfe0 mm/vmscan.c:3035 ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) try_to_free_pages+0x27f/0x7c0 mm/vmscan.c:3251 ksoftirqd/0 cpuset=/ mems_allowed=0-1 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 __perform_reclaim mm/page_alloc.c:3800 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3821 [inline] __alloc_pages_slowpath mm/page_alloc.c:4211 [inline] __alloc_pages_nodemask+0xcc8/0x2890 mm/page_alloc.c:4419 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 __do_cache_alloc mm/slab.c:3361 [inline] slab_alloc mm/slab.c:3389 [inline] kmem_cache_alloc_trace+0x1f1/0x380 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] syslog_print kernel/printk/printk.c:1337 [inline] do_syslog.part.0+0x24f/0x1510 kernel/printk/printk.c:1505 do_syslog+0x49/0x60 kernel/printk/printk.c:1486 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 __vfs_read+0xf7/0x750 fs/read_write.c:416 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe __do_softirq+0x265/0x980 kernel/softirq.c:292 RIP: 0033:0x7f32b454c22d Code: Bad RIP value. run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 RSP: 002b:00007f32b1ee8580 EFLAGS: 00000293 ORIG_RAX: 0000000000000000 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f32b454c22d RDX: 0000000000001fa0 RSI: 00007f32b1ee8da0 RDI: 0000000000000004 RBP: 00005630190519d0 R08: 0000000000000000 R09: 0000000000000000 R10: 2ce33e6c02ce33e7 R11: 0000000000000293 R12: 00007f32b1ee8da0 R13: 0000000000001fa0 R14: 0000000000001f9f R15: 00007f32b1ee8e20 kthread+0x33f/0x460 kernel/kthread.c:259 rcu: rcu_preempt kthread starved for 10264 jiffies! g361853 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 rcu_preempt R running task 29208 10 2 0x80000000 ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) ksoftirqd/0 cpuset=/ mems_allowed=0-1 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0 schedule_timeout+0x4cf/0xfe0 kernel/time/timer.c:1818 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+0x1fc/0x2ef lib/dump_stack.c:118 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 rcu_gp_kthread+0xdad/0x21c0 kernel/rcu/tree.c:2202 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 kthread+0x33f/0x460 kernel/kthread.c:259 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 in:imklog: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 in:imklog cpuset=/ mems_allowed=0-1 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 warn_alloc_show_mem: 1 callbacks suppressed CPU: 1 PID: 7846 Comm: in:imklog Not tainted 4.19.211-syzkaller #0 Mem-Info: active_anon:175849 inactive_anon:24736 isolated_anon:0 active_file:13 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:18482 slab_unreclaimable:1431264 mapped:23476 shmem:28251 pagetables:984 bounce:0 free:11077 free_pcp:541 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Node 0 active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:93904kB dirty:0kB writeback:0kB shmem:113004kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 139264kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Node 1 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 Node 0 DMA free:10860kB min:204kB low:252kB high:300kB 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+0x7b/0x18f mm/page_alloc.c:3457 lowmem_reserve[]: 0 2693 2695 2695 2695 Node 0 DMA32 free:13256kB min:35996kB low:44992kB high:53988kB active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB writepending:0kB present:3129332kB managed:2763452kB mlocked:0kB kernel_stack:7680kB pagetables:3936kB bounce:0kB free_pcp:488kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 1 1 1 Node 0 Normal free:8kB min:24kB low:28kB high:32kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:2000kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:20184kB min:53876kB low:67344kB high:80812kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:4194304kB managed:4128248kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1676kB local_pcp:248kB free_cma:0kB __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 lowmem_reserve[]: 0 0 0 0 0 Node 0 DMA: 7*4kB (U) 0*8kB 1*16kB (U) 0*32kB 1*64kB (U) 0*128kB 0*256kB 1*512kB (U) 0*1024kB 1*2048kB (M) 2*4096kB (M) = 10860kB Node 0 DMA32: 1612*4kB (UME) 533*8kB (UMEH) 129*16kB (UME) 5*32kB (UMH) 1*64kB (H) 0*128kB 1*256kB (H) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13256kB Node 0 Normal: 0*4kB 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 8kB Node 1 Normal: 10*4kB (ME) 6*8kB (UME) 4*16kB (M) 4*32kB (UM) 3*64kB (ME) 0*128kB 3*256kB (UME) 1*512kB (M) 2*1024kB (UM) 0*2048kB 4*4096kB (M) = 20184kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB fallback_alloc+0x213/0x2e0 mm/slab.c:3224 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB __alloc_skb+0x71/0x560 net/core/skbuff.c:193 28277 total pagecache pages alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 0 pages in swap cache ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 Swap cache stats: add 0, delete 0, find 0/0 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 Free swap = 0kB Total swap = 0kB call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 2097051 pages RAM 0 pages HighMem/MovableOnly 369649 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 ksoftirqd/0 cpuset=/ mems_allowed=0-1 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 RSP: 0000:ffff8880a16df210 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88808f6c45c0 RBX: ffff8880af23e3c0 RCX: 1ffff11011ed89d8 RDX: 0000000000000000 RSI: ffffffff8189c311 RDI: ffff88808f6c4930 RBP: ffff8880b59f68c0 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882389cca80 R13: ffff8880a16df358 R14: ffff8880a16df35c R15: ffff8880b59f68c0 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] list_lru_count_one+0x41/0x360 mm/list_lru.c:189 list_lru_shrink_count include/linux/list_lru.h:123 [inline] super_cache_count+0x1b4/0x2e0 fs/super.c:145 do_shrink_slab+0x10b/0xa40 mm/vmscan.c:464 shrink_slab+0x16f/0x550 mm/vmscan.c:693 shrink_node.isra.0+0x2d3/0x1300 mm/vmscan.c:2748 shrink_zones mm/vmscan.c:2977 [inline] do_try_to_free_pages+0x38e/0xfe0 mm/vmscan.c:3035 try_to_free_pages+0x27f/0x7c0 mm/vmscan.c:3251 __perform_reclaim mm/page_alloc.c:3800 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3821 [inline] __alloc_pages_slowpath mm/page_alloc.c:4211 [inline] __alloc_pages_nodemask+0xcc8/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 __do_cache_alloc mm/slab.c:3361 [inline] slab_alloc mm/slab.c:3389 [inline] kmem_cache_alloc_trace+0x1f1/0x380 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] syslog_print kernel/printk/printk.c:1337 [inline] do_syslog.part.0+0x24f/0x1510 kernel/printk/printk.c:1505 do_syslog+0x49/0x60 kernel/printk/printk.c:1486 kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f32b454c22d Code: Bad RIP value. RSP: 002b:00007f32b1ee8580 EFLAGS: 00000293 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f32b454c22d RDX: 0000000000001fa0 RSI: 00007f32b1ee8da0 RDI: 0000000000000004 RBP: 00005630190519d0 R08: 0000000000000000 R09: 0000000000000000 R10: 2ce33e6c02ce33e7 R11: 0000000000000293 R12: 00007f32b1ee8da0 R13: 0000000000001fa0 R14: 0000000000001f9f R15: 00007f32b1ee8e20 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0 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+0x1fc/0x2ef lib/dump_stack.c:118 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 in:imklog: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) in:imklog cpuset=/ mems_allowed=0-1 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 warn_alloc_show_mem: 1 callbacks suppressed CPU: 1 PID: 7846 Comm: in:imklog Not tainted 4.19.211-syzkaller #0 Mem-Info: active_anon:175849 inactive_anon:24736 isolated_anon:0 active_file:13 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:18482 slab_unreclaimable:1431264 mapped:23476 shmem:28251 pagetables:984 bounce:0 free:11077 free_pcp:541 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:93904kB dirty:0kB writeback:0kB shmem:113004kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 139264kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Call Trace: Node 1 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Node 0 DMA free:10860kB min:204kB low:252kB high:300kB 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+0x1fc/0x2ef lib/dump_stack.c:118 lowmem_reserve[]: 0 2693 2695 2695 2695 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 Node 0 DMA32 free:13256kB min:35996kB low:44992kB high:53988kB active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB writepending:0kB present:3129332kB managed:2763452kB mlocked:0kB kernel_stack:7680kB pagetables:3936kB bounce:0kB free_pcp:488kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 1 1 1 Node 0 Normal free:8kB min:24kB low:28kB high:32kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:2000kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:20184kB min:53876kB low:67344kB high:80812kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:4194304kB managed:4128248kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1676kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 Node 0 DMA: 7*4kB (U) 0*8kB 1*16kB (U) 0*32kB 1*64kB (U) 0*128kB 0*256kB 1*512kB (U) 0*1024kB 1*2048kB (M) 2*4096kB (M) = 10860kB Node 0 DMA32: 1612*4kB (UME) 533*8kB (UMEH) 129*16kB (UME) 5*32kB (UMH) 1*64kB (H) 0*128kB 1*256kB (H) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13256kB Node 0 Normal: 0*4kB 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 8kB Node 1 Normal: 10*4kB (ME) 6*8kB (UME) 4*16kB (M) 4*32kB (UM) 3*64kB (ME) 0*128kB 3*256kB (UME) 1*512kB (M) 2*1024kB (UM) 0*2048kB 4*4096kB (M) = 20184kB 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 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB fallback_alloc+0x213/0x2e0 mm/slab.c:3224 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 28277 total pagecache pages slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 0 pages in swap cache __alloc_skb+0x71/0x560 net/core/skbuff.c:193 Swap cache stats: add 0, delete 0, find 0/0 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 Free swap = 0kB ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 Total swap = 0kB addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 2097051 pages RAM 0 pages HighMem/MovableOnly call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 369649 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) ksoftirqd/0 cpuset=/ mems_allowed=0-1 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 RSP: 0000:ffff8880a16df210 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88808f6c45c0 RBX: ffff8880af23e3c0 RCX: 1ffff11011ed89d8 RDX: 0000000000000000 RSI: ffffffff8189c311 RDI: ffff88808f6c4930 RBP: ffff8880b59f68c0 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882389cca80 R13: ffff8880a16df358 R14: ffff8880a16df35c R15: ffff8880b59f68c0 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] list_lru_count_one+0x41/0x360 mm/list_lru.c:189 list_lru_shrink_count include/linux/list_lru.h:123 [inline] super_cache_count+0x1b4/0x2e0 fs/super.c:145 do_shrink_slab+0x10b/0xa40 mm/vmscan.c:464 shrink_slab+0x16f/0x550 mm/vmscan.c:693 shrink_node.isra.0+0x2d3/0x1300 mm/vmscan.c:2748 shrink_zones mm/vmscan.c:2977 [inline] do_try_to_free_pages+0x38e/0xfe0 mm/vmscan.c:3035 try_to_free_pages+0x27f/0x7c0 mm/vmscan.c:3251 __perform_reclaim mm/page_alloc.c:3800 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3821 [inline] __alloc_pages_slowpath mm/page_alloc.c:4211 [inline] __alloc_pages_nodemask+0xcc8/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 __do_cache_alloc mm/slab.c:3361 [inline] slab_alloc mm/slab.c:3389 [inline] kmem_cache_alloc_trace+0x1f1/0x380 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] syslog_print kernel/printk/printk.c:1337 [inline] do_syslog.part.0+0x24f/0x1510 kernel/printk/printk.c:1505 do_syslog+0x49/0x60 kernel/printk/printk.c:1486 kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f32b454c22d Code: Bad RIP value. RSP: 002b:00007f32b1ee8580 EFLAGS: 00000293 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f32b454c22d RDX: 0000000000001fa0 RSI: 00007f32b1ee8da0 RDI: 0000000000000004 RBP: 00005630190519d0 R08: 0000000000000000 R09: 0000000000000000 R10: 2ce33e6c02ce33e7 R11: 0000000000000293 R12: 00007f32b1ee8da0 R13: 0000000000001fa0 R14: 0000000000001f9f R15: 00007f32b1ee8e20 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0 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+0x1fc/0x2ef lib/dump_stack.c:118 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 in:imklog: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) in:imklog cpuset=/ mems_allowed=0-1 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 warn_alloc_show_mem: 1 callbacks suppressed CPU: 1 PID: 7846 Comm: in:imklog Not tainted 4.19.211-syzkaller #0 Mem-Info: active_anon:175849 inactive_anon:24736 isolated_anon:0 active_file:13 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:18482 slab_unreclaimable:1431264 mapped:23476 shmem:28251 pagetables:984 bounce:0 free:11077 free_pcp:541 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:93904kB dirty:0kB writeback:0kB shmem:113004kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 139264kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Call Trace: Node 1 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Node 0 DMA free:10860kB min:204kB low:252kB high:300kB 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+0x1fc/0x2ef lib/dump_stack.c:118 lowmem_reserve[]: 0 2693 2695 2695 2695 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 Node 0 DMA32 free:13256kB min:35996kB low:44992kB high:53988kB active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB writepending:0kB present:3129332kB managed:2763452kB mlocked:0kB kernel_stack:7680kB pagetables:3936kB bounce:0kB free_pcp:488kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 1 1 1 Node 0 Normal free:8kB min:24kB low:28kB high:32kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:2000kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:20184kB min:53876kB low:67344kB high:80812kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:4194304kB managed:4128248kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1676kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 Node 0 DMA: 7*4kB (U) 0*8kB 1*16kB (U) 0*32kB 1*64kB (U) 0*128kB 0*256kB 1*512kB (U) 0*1024kB 1*2048kB (M) 2*4096kB (M) = 10860kB Node 0 DMA32: 1612*4kB (UME) 533*8kB (UMEH) 129*16kB (UME) 5*32kB (UMH) 1*64kB (H) 0*128kB 1*256kB (H) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13256kB Node 0 Normal: 0*4kB 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 8kB Node 1 Normal: 10*4kB (ME) 6*8kB (UME) 4*16kB (M) 4*32kB (UM) 3*64kB (ME) 0*128kB 3*256kB (UME) 1*512kB (M) 2*1024kB (UM) 0*2048kB 4*4096kB (M) = 20184kB 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 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB fallback_alloc+0x213/0x2e0 mm/slab.c:3224 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 28277 total pagecache pages __alloc_skb+0x71/0x560 net/core/skbuff.c:193 0 pages in swap cache alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 Swap cache stats: add 0, delete 0, find 0/0 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 Free swap = 0kB addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 Total swap = 0kB 2097051 pages RAM call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 0 pages HighMem/MovableOnly 369649 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) ksoftirqd/0 cpuset=/ mems_allowed=0-1 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 RSP: 0000:ffff8880a16df210 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88808f6c45c0 RBX: ffff8880af23e3c0 RCX: 1ffff11011ed89d8 RDX: 0000000000000000 RSI: ffffffff8189c311 RDI: ffff88808f6c4930 RBP: ffff8880b59f68c0 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882389cca80 R13: ffff8880a16df358 R14: ffff8880a16df35c R15: ffff8880b59f68c0 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] list_lru_count_one+0x41/0x360 mm/list_lru.c:189 list_lru_shrink_count include/linux/list_lru.h:123 [inline] super_cache_count+0x1b4/0x2e0 fs/super.c:145 do_shrink_slab+0x10b/0xa40 mm/vmscan.c:464 shrink_slab+0x16f/0x550 mm/vmscan.c:693 shrink_node.isra.0+0x2d3/0x1300 mm/vmscan.c:2748 shrink_zones mm/vmscan.c:2977 [inline] do_try_to_free_pages+0x38e/0xfe0 mm/vmscan.c:3035 try_to_free_pages+0x27f/0x7c0 mm/vmscan.c:3251 __perform_reclaim mm/page_alloc.c:3800 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3821 [inline] __alloc_pages_slowpath mm/page_alloc.c:4211 [inline] __alloc_pages_nodemask+0xcc8/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 __do_cache_alloc mm/slab.c:3361 [inline] slab_alloc mm/slab.c:3389 [inline] kmem_cache_alloc_trace+0x1f1/0x380 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] syslog_print kernel/printk/printk.c:1337 [inline] do_syslog.part.0+0x24f/0x1510 kernel/printk/printk.c:1505 do_syslog+0x49/0x60 kernel/printk/printk.c:1486 kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f32b454c22d Code: Bad RIP value. RSP: 002b:00007f32b1ee8580 EFLAGS: 00000293 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f32b454c22d RDX: 0000000000001fa0 RSI: 00007f32b1ee8da0 RDI: 0000000000000004 RBP: 00005630190519d0 R08: 0000000000000000 R09: 0000000000000000 R10: 2ce33e6c02ce33e7 R11: 0000000000000293 R12: 00007f32b1ee8da0 R13: 0000000000001fa0 R14: 0000000000001f9f R15: 00007f32b1ee8e20 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0 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: in:imklog: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 in:imklog cpuset=/ mems_allowed=0-1 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 warn_alloc_show_mem: 1 callbacks suppressed CPU: 1 PID: 7846 Comm: in:imklog Not tainted 4.19.211-syzkaller #0 Mem-Info: active_anon:175849 inactive_anon:24736 isolated_anon:0 active_file:13 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:18482 slab_unreclaimable:1431264 mapped:23476 shmem:28251 pagetables:984 bounce:0 free:11077 free_pcp:541 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:93904kB dirty:0kB writeback:0kB shmem:113004kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 139264kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Call Trace: Node 1 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Node 0 DMA free:10860kB min:204kB low:252kB high:300kB 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+0x1fc/0x2ef lib/dump_stack.c:118 lowmem_reserve[]: 0 2693 2695 2695 2695 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 Node 0 DMA32 free:13256kB min:35996kB low:44992kB high:53988kB active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB writepending:0kB present:3129332kB managed:2763452kB mlocked:0kB kernel_stack:7680kB pagetables:3936kB bounce:0kB free_pcp:488kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 1 1 1 Node 0 Normal free:8kB min:24kB low:28kB high:32kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:2000kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:20184kB min:53876kB low:67344kB high:80812kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:4194304kB managed:4128248kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1676kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 Node 0 DMA: 7*4kB (U) 0*8kB 1*16kB (U) 0*32kB 1*64kB (U) 0*128kB 0*256kB 1*512kB (U) 0*1024kB 1*2048kB (M) 2*4096kB (M) = 10860kB Node 0 DMA32: 1612*4kB (UME) 533*8kB (UMEH) 129*16kB (UME) 5*32kB (UMH) 1*64kB (H) 0*128kB 1*256kB (H) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13256kB Node 0 Normal: 0*4kB 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 8kB Node 1 Normal: 10*4kB (ME) 6*8kB (UME) 4*16kB (M) 4*32kB (UM) 3*64kB (ME) 0*128kB 3*256kB (UME) 1*512kB (M) 2*1024kB (UM) 0*2048kB 4*4096kB (M) = 20184kB 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 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB fallback_alloc+0x213/0x2e0 mm/slab.c:3224 28277 total pagecache pages slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 0 pages in swap cache __alloc_skb+0x71/0x560 net/core/skbuff.c:193 Swap cache stats: add 0, delete 0, find 0/0 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 Free swap = 0kB ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 Total swap = 0kB addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 2097051 pages RAM 0 pages HighMem/MovableOnly call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 369649 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) ksoftirqd/0 cpuset=/ mems_allowed=0-1 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 RSP: 0000:ffff8880a16df210 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88808f6c45c0 RBX: ffff8880af23e3c0 RCX: 1ffff11011ed89d8 RDX: 0000000000000000 RSI: ffffffff8189c311 RDI: ffff88808f6c4930 RBP: ffff8880b59f68c0 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882389cca80 R13: ffff8880a16df358 R14: ffff8880a16df35c R15: ffff8880b59f68c0 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] list_lru_count_one+0x41/0x360 mm/list_lru.c:189 list_lru_shrink_count include/linux/list_lru.h:123 [inline] super_cache_count+0x1b4/0x2e0 fs/super.c:145 do_shrink_slab+0x10b/0xa40 mm/vmscan.c:464 shrink_slab+0x16f/0x550 mm/vmscan.c:693 shrink_node.isra.0+0x2d3/0x1300 mm/vmscan.c:2748 shrink_zones mm/vmscan.c:2977 [inline] do_try_to_free_pages+0x38e/0xfe0 mm/vmscan.c:3035 try_to_free_pages+0x27f/0x7c0 mm/vmscan.c:3251 __perform_reclaim mm/page_alloc.c:3800 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3821 [inline] __alloc_pages_slowpath mm/page_alloc.c:4211 [inline] __alloc_pages_nodemask+0xcc8/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 __do_cache_alloc mm/slab.c:3361 [inline] slab_alloc mm/slab.c:3389 [inline] kmem_cache_alloc_trace+0x1f1/0x380 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] syslog_print kernel/printk/printk.c:1337 [inline] do_syslog.part.0+0x24f/0x1510 kernel/printk/printk.c:1505 do_syslog+0x49/0x60 kernel/printk/printk.c:1486 kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f32b454c22d Code: Bad RIP value. RSP: 002b:00007f32b1ee8580 EFLAGS: 00000293 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f32b454c22d RDX: 0000000000001fa0 RSI: 00007f32b1ee8da0 RDI: 0000000000000004 RBP: 00005630190519d0 R08: 0000000000000000 R09: 0000000000000000 R10: 2ce33e6c02ce33e7 R11: 0000000000000293 R12: 00007f32b1ee8da0 R13: 0000000000001fa0 R14: 0000000000001f9f R15: 00007f32b1ee8e20 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0 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+0x1fc/0x2ef lib/dump_stack.c:118 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 in:imklog: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) in:imklog cpuset=/ mems_allowed=0-1 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 warn_alloc_show_mem: 1 callbacks suppressed CPU: 1 PID: 7846 Comm: in:imklog Not tainted 4.19.211-syzkaller #0 Mem-Info: active_anon:175849 inactive_anon:24736 isolated_anon:0 active_file:13 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:18482 slab_unreclaimable:1431264 mapped:23476 shmem:28251 pagetables:984 bounce:0 free:11077 free_pcp:541 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:93904kB dirty:0kB writeback:0kB shmem:113004kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 139264kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Call Trace: Node 1 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Node 0 DMA free:10860kB min:204kB low:252kB high:300kB 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+0x1fc/0x2ef lib/dump_stack.c:118 lowmem_reserve[]: 0 2693 2695 2695 2695 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 Node 0 DMA32 free:13256kB min:35996kB low:44992kB high:53988kB active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB writepending:0kB present:3129332kB managed:2763452kB mlocked:0kB kernel_stack:7680kB pagetables:3936kB bounce:0kB free_pcp:488kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 1 1 1 Node 0 Normal free:8kB min:24kB low:28kB high:32kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:2000kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:20184kB min:53876kB low:67344kB high:80812kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:4194304kB managed:4128248kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1676kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 Node 0 DMA: 7*4kB (U) 0*8kB 1*16kB (U) 0*32kB 1*64kB (U) 0*128kB 0*256kB 1*512kB (U) 0*1024kB 1*2048kB (M) 2*4096kB (M) = 10860kB Node 0 DMA32: 1612*4kB (UME) 533*8kB (UMEH) 129*16kB (UME) 5*32kB (UMH) 1*64kB (H) 0*128kB 1*256kB (H) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13256kB Node 0 Normal: 0*4kB 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 8kB Node 1 Normal: 10*4kB (ME) 6*8kB (UME) 4*16kB (M) 4*32kB (UM) 3*64kB (ME) 0*128kB 3*256kB (UME) 1*512kB (M) 2*1024kB (UM) 0*2048kB 4*4096kB (M) = 20184kB 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 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 28277 total pagecache pages fallback_alloc+0x213/0x2e0 mm/slab.c:3224 0 pages in swap cache slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 Swap cache stats: add 0, delete 0, find 0/0 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 Free swap = 0kB alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 Total swap = 0kB ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 2097051 pages RAM addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 0 pages HighMem/MovableOnly 369649 pages reserved call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) ksoftirqd/0 cpuset=/ mems_allowed=0-1 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 RSP: 0000:ffff8880a16df210 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88808f6c45c0 RBX: ffff8880af23e3c0 RCX: 1ffff11011ed89d8 RDX: 0000000000000000 RSI: ffffffff8189c311 RDI: ffff88808f6c4930 RBP: ffff8880b59f68c0 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882389cca80 R13: ffff8880a16df358 R14: ffff8880a16df35c R15: ffff8880b59f68c0 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] list_lru_count_one+0x41/0x360 mm/list_lru.c:189 list_lru_shrink_count include/linux/list_lru.h:123 [inline] super_cache_count+0x1b4/0x2e0 fs/super.c:145 do_shrink_slab+0x10b/0xa40 mm/vmscan.c:464 shrink_slab+0x16f/0x550 mm/vmscan.c:693 shrink_node.isra.0+0x2d3/0x1300 mm/vmscan.c:2748 shrink_zones mm/vmscan.c:2977 [inline] do_try_to_free_pages+0x38e/0xfe0 mm/vmscan.c:3035 try_to_free_pages+0x27f/0x7c0 mm/vmscan.c:3251 __perform_reclaim mm/page_alloc.c:3800 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3821 [inline] __alloc_pages_slowpath mm/page_alloc.c:4211 [inline] __alloc_pages_nodemask+0xcc8/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 __do_cache_alloc mm/slab.c:3361 [inline] slab_alloc mm/slab.c:3389 [inline] kmem_cache_alloc_trace+0x1f1/0x380 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] syslog_print kernel/printk/printk.c:1337 [inline] do_syslog.part.0+0x24f/0x1510 kernel/printk/printk.c:1505 do_syslog+0x49/0x60 kernel/printk/printk.c:1486 kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f32b454c22d Code: Bad RIP value. RSP: 002b:00007f32b1ee8580 EFLAGS: 00000293 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f32b454c22d RDX: 0000000000001fa0 RSI: 00007f32b1ee8da0 RDI: 0000000000000004 RBP: 00005630190519d0 R08: 0000000000000000 R09: 0000000000000000 R10: 2ce33e6c02ce33e7 R11: 0000000000000293 R12: 00007f32b1ee8da0 R13: 0000000000001fa0 R14: 0000000000001f9f R15: 00007f32b1ee8e20 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0 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+0x1fc/0x2ef lib/dump_stack.c:118 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 in:imklog: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) in:imklog cpuset=/ mems_allowed=0-1 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 warn_alloc_show_mem: 1 callbacks suppressed CPU: 1 PID: 7846 Comm: in:imklog Not tainted 4.19.211-syzkaller #0 Mem-Info: active_anon:175849 inactive_anon:24736 isolated_anon:0 active_file:13 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:18482 slab_unreclaimable:1431264 mapped:23476 shmem:28251 pagetables:984 bounce:0 free:11077 free_pcp:541 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:93904kB dirty:0kB writeback:0kB shmem:113004kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 139264kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Call Trace: Node 1 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Node 0 DMA free:10860kB min:204kB low:252kB high:300kB 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+0x1fc/0x2ef lib/dump_stack.c:118 lowmem_reserve[]: 0 2693 2695 2695 2695 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 Node 0 DMA32 free:13256kB min:35996kB low:44992kB high:53988kB active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB writepending:0kB present:3129332kB managed:2763452kB mlocked:0kB kernel_stack:7680kB pagetables:3936kB bounce:0kB free_pcp:488kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 1 1 1 Node 0 Normal free:8kB min:24kB low:28kB high:32kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:2000kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:20184kB min:53876kB low:67344kB high:80812kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:4194304kB managed:4128248kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1676kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 Node 0 DMA: 7*4kB (U) 0*8kB 1*16kB (U) 0*32kB 1*64kB (U) 0*128kB 0*256kB 1*512kB (U) 0*1024kB 1*2048kB (M) 2*4096kB (M) = 10860kB Node 0 DMA32: 1612*4kB (UME) 533*8kB (UMEH) 129*16kB (UME) 5*32kB (UMH) 1*64kB (H) 0*128kB 1*256kB (H) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13256kB Node 0 Normal: 0*4kB 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 8kB Node 1 Normal: 10*4kB (ME) 6*8kB (UME) 4*16kB (M) 4*32kB (UM) 3*64kB (ME) 0*128kB 3*256kB (UME) 1*512kB (M) 2*1024kB (UM) 0*2048kB 4*4096kB (M) = 20184kB 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 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB fallback_alloc+0x213/0x2e0 mm/slab.c:3224 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 28277 total pagecache pages __alloc_skb+0x71/0x560 net/core/skbuff.c:193 0 pages in swap cache alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 Total swap = 0kB 2097051 pages RAM addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 0 pages HighMem/MovableOnly 369649 pages reserved call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) ksoftirqd/0 cpuset=/ mems_allowed=0-1 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 RSP: 0000:ffff8880a16df210 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88808f6c45c0 RBX: ffff8880af23e3c0 RCX: 1ffff11011ed89d8 RDX: 0000000000000000 RSI: ffffffff8189c311 RDI: ffff88808f6c4930 RBP: ffff8880b59f68c0 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882389cca80 R13: ffff8880a16df358 R14: ffff8880a16df35c R15: ffff8880b59f68c0 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] list_lru_count_one+0x41/0x360 mm/list_lru.c:189 list_lru_shrink_count include/linux/list_lru.h:123 [inline] super_cache_count+0x1b4/0x2e0 fs/super.c:145 do_shrink_slab+0x10b/0xa40 mm/vmscan.c:464 shrink_slab+0x16f/0x550 mm/vmscan.c:693 shrink_node.isra.0+0x2d3/0x1300 mm/vmscan.c:2748 shrink_zones mm/vmscan.c:2977 [inline] do_try_to_free_pages+0x38e/0xfe0 mm/vmscan.c:3035 try_to_free_pages+0x27f/0x7c0 mm/vmscan.c:3251 __perform_reclaim mm/page_alloc.c:3800 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3821 [inline] __alloc_pages_slowpath mm/page_alloc.c:4211 [inline] __alloc_pages_nodemask+0xcc8/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 __do_cache_alloc mm/slab.c:3361 [inline] slab_alloc mm/slab.c:3389 [inline] kmem_cache_alloc_trace+0x1f1/0x380 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] syslog_print kernel/printk/printk.c:1337 [inline] do_syslog.part.0+0x24f/0x1510 kernel/printk/printk.c:1505 do_syslog+0x49/0x60 kernel/printk/printk.c:1486 kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f32b454c22d Code: Bad RIP value. RSP: 002b:00007f32b1ee8580 EFLAGS: 00000293 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f32b454c22d RDX: 0000000000001fa0 RSI: 00007f32b1ee8da0 RDI: 0000000000000004 RBP: 00005630190519d0 R08: 0000000000000000 R09: 0000000000000000 R10: 2ce33e6c02ce33e7 R11: 0000000000000293 R12: 00007f32b1ee8da0 R13: 0000000000001fa0 R14: 0000000000001f9f R15: 00007f32b1ee8e20 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0 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+0x1fc/0x2ef lib/dump_stack.c:118 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 in:imklog: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) in:imklog cpuset=/ mems_allowed=0-1 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 warn_alloc_show_mem: 1 callbacks suppressed CPU: 1 PID: 7846 Comm: in:imklog Not tainted 4.19.211-syzkaller #0 Mem-Info: active_anon:175849 inactive_anon:24736 isolated_anon:0 active_file:13 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:18482 slab_unreclaimable:1431264 mapped:23476 shmem:28251 pagetables:984 bounce:0 free:11077 free_pcp:541 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Node 0 active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:93904kB dirty:0kB writeback:0kB shmem:113004kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 139264kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Call Trace: Node 1 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Node 0 DMA free:10860kB min:204kB low:252kB high:300kB 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+0x1fc/0x2ef lib/dump_stack.c:118 lowmem_reserve[]: 0 2693 2695 2695 2695 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 Node 0 DMA32 free:13256kB min:35996kB low:44992kB high:53988kB active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB writepending:0kB present:3129332kB managed:2763452kB mlocked:0kB kernel_stack:7680kB pagetables:3936kB bounce:0kB free_pcp:488kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 1 1 1 Node 0 Normal free:8kB min:24kB low:28kB high:32kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:2000kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:20184kB min:53876kB low:67344kB high:80812kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:4194304kB managed:4128248kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1676kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 Node 0 DMA: 7*4kB (U) 0*8kB 1*16kB (U) 0*32kB 1*64kB (U) 0*128kB 0*256kB 1*512kB (U) 0*1024kB 1*2048kB (M) 2*4096kB (M) = 10860kB Node 0 DMA32: 1612*4kB (UME) 533*8kB (UMEH) 129*16kB (UME) 5*32kB (UMH) 1*64kB (H) 0*128kB 1*256kB (H) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13256kB Node 0 Normal: 0*4kB 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 8kB Node 1 Normal: 10*4kB (ME) 6*8kB (UME) 4*16kB (M) 4*32kB (UM) 3*64kB (ME) 0*128kB 3*256kB (UME) 1*512kB (M) 2*1024kB (UM) 0*2048kB 4*4096kB (M) = 20184kB 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 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB fallback_alloc+0x213/0x2e0 mm/slab.c:3224 28277 total pagecache pages slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 0 pages in swap cache __alloc_skb+0x71/0x560 net/core/skbuff.c:193 Swap cache stats: add 0, delete 0, find 0/0 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 Free swap = 0kB ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 Total swap = 0kB addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 2097051 pages RAM 0 pages HighMem/MovableOnly call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 369649 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) ksoftirqd/0 cpuset=/ mems_allowed=0-1 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 RSP: 0000:ffff8880a16df210 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88808f6c45c0 RBX: ffff8880af23e3c0 RCX: 1ffff11011ed89d8 RDX: 0000000000000000 RSI: ffffffff8189c311 RDI: ffff88808f6c4930 RBP: ffff8880b59f68c0 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882389cca80 R13: ffff8880a16df358 R14: ffff8880a16df35c R15: ffff8880b59f68c0 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] list_lru_count_one+0x41/0x360 mm/list_lru.c:189 list_lru_shrink_count include/linux/list_lru.h:123 [inline] super_cache_count+0x1b4/0x2e0 fs/super.c:145 do_shrink_slab+0x10b/0xa40 mm/vmscan.c:464 shrink_slab+0x16f/0x550 mm/vmscan.c:693 shrink_node.isra.0+0x2d3/0x1300 mm/vmscan.c:2748 shrink_zones mm/vmscan.c:2977 [inline] do_try_to_free_pages+0x38e/0xfe0 mm/vmscan.c:3035 try_to_free_pages+0x27f/0x7c0 mm/vmscan.c:3251 __perform_reclaim mm/page_alloc.c:3800 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3821 [inline] __alloc_pages_slowpath mm/page_alloc.c:4211 [inline] __alloc_pages_nodemask+0xcc8/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 __do_cache_alloc mm/slab.c:3361 [inline] slab_alloc mm/slab.c:3389 [inline] kmem_cache_alloc_trace+0x1f1/0x380 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] syslog_print kernel/printk/printk.c:1337 [inline] do_syslog.part.0+0x24f/0x1510 kernel/printk/printk.c:1505 do_syslog+0x49/0x60 kernel/printk/printk.c:1486 kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f32b454c22d Code: Bad RIP value. RSP: 002b:00007f32b1ee8580 EFLAGS: 00000293 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f32b454c22d RDX: 0000000000001fa0 RSI: 00007f32b1ee8da0 RDI: 0000000000000004 RBP: 00005630190519d0 R08: 0000000000000000 R09: 0000000000000000 R10: 2ce33e6c02ce33e7 R11: 0000000000000293 R12: 00007f32b1ee8da0 R13: 0000000000001fa0 R14: 0000000000001f9f R15: 00007f32b1ee8e20 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0 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+0x1fc/0x2ef lib/dump_stack.c:118 warn_alloc.cold+0x7b/0x18f mm/page_alloc.c:3457 in:imklog: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) in:imklog cpuset=/ mems_allowed=0-1 __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 fallback_alloc+0x213/0x2e0 mm/slab.c:3224 slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 warn_alloc_show_mem: 1 callbacks suppressed CPU: 1 PID: 7846 Comm: in:imklog Not tainted 4.19.211-syzkaller #0 Mem-Info: active_anon:175849 inactive_anon:24736 isolated_anon:0 active_file:13 inactive_file:13 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:18482 slab_unreclaimable:1431264 mapped:23476 shmem:28251 pagetables:984 bounce:0 free:11077 free_pcp:541 free_cma:0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Node 0 active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:93904kB dirty:0kB writeback:0kB shmem:113004kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 139264kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes Node 1 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 Node 0 DMA free:10860kB min:204kB low:252kB high:300kB 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+0x7b/0x18f mm/page_alloc.c:3457 lowmem_reserve[]: 0 2693 2695 2695 2695 Node 0 DMA32 free:13256kB min:35996kB low:44992kB high:53988kB active_anon:703396kB inactive_anon:98944kB active_file:52kB inactive_file:48kB unevictable:0kB writepending:0kB present:3129332kB managed:2763452kB mlocked:0kB kernel_stack:7680kB pagetables:3936kB bounce:0kB free_pcp:488kB local_pcp:248kB free_cma:0kB lowmem_reserve[]: 0 0 1 1 1 Node 0 Normal free:8kB min:24kB low:28kB high:32kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:2000kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:20184kB min:53876kB low:67344kB high:80812kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:4194304kB managed:4128248kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1676kB local_pcp:248kB free_cma:0kB __alloc_pages_slowpath mm/page_alloc.c:4317 [inline] __alloc_pages_nodemask+0x232f/0x2890 mm/page_alloc.c:4419 lowmem_reserve[]: 0 0 0 0 0 Node 0 DMA: 7*4kB (U) 0*8kB 1*16kB (U) 0*32kB 1*64kB (U) 0*128kB 0*256kB 1*512kB (U) 0*1024kB 1*2048kB (M) 2*4096kB (M) = 10860kB Node 0 DMA32: 1612*4kB (UME) 533*8kB (UMEH) 129*16kB (UME) 5*32kB (UMH) 1*64kB (H) 0*128kB 1*256kB (H) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 13256kB Node 0 Normal: 0*4kB 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 8kB Node 1 Normal: 10*4kB (ME) 6*8kB (UME) 4*16kB (M) 4*32kB (UM) 3*64kB (ME) 0*128kB 3*256kB (UME) 1*512kB (M) 2*1024kB (UM) 0*2048kB 4*4096kB (M) = 20184kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] kmem_getpages mm/slab.c:1412 [inline] cache_grow_begin+0xa4/0x8a0 mm/slab.c:2682 Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB fallback_alloc+0x213/0x2e0 mm/slab.c:3224 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB slab_alloc_node mm/slab.c:3332 [inline] kmem_cache_alloc_node+0xe3/0x3b0 mm/slab.c:3647 Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB __alloc_skb+0x71/0x560 net/core/skbuff.c:193 28277 total pagecache pages alloc_skb include/linux/skbuff.h:995 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:403 0 pages in swap cache ndisc_send_rs+0x33a/0x690 net/ipv6/ndisc.c:669 Swap cache stats: add 0, delete 0, find 0/0 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835 Free swap = 0kB Total swap = 0kB call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 2097051 pages RAM 0 pages HighMem/MovableOnly 369649 pages reserved 0 pages cma reserved ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb ksoftirqd/0: page allocation failure: order:0, mode:0x484020(GFP_ATOMIC|__GFP_COMP), nodemask=(null) expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 ksoftirqd/0 cpuset=/ mems_allowed=0-1 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 RSP: 0000:ffff8880a16df210 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88808f6c45c0 RBX: ffff8880af23e3c0 RCX: 1ffff11011ed89d8 RDX: 0000000000000000 RSI: ffffffff8189c311 RDI: ffff88808f6c4930 RBP: ffff8880b59f68c0 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882389cca80 R13: ffff8880a16df358 R14: ffff8880a16df35c R15: ffff8880b59f68c0 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] list_lru_count_one+0x41/0x360 mm/list_lru.c:189 list_lru_shrink_count include/linux/list_lru.h:123 [inline] super_cache_count+0x1b4/0x2e0 fs/super.c:145 do_shrink_slab+0x10b/0xa40 mm/vmscan.c:464 shrink_slab+0x16f/0x550 mm/vmscan.c:693 shrink_node.isra.0+0x2d3/0x1300 mm/vmscan.c:2748 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: ff 48 f7 decl -0x9(%rax) 3: 04 24 add $0x24,%al 5: 00 02 add %al,(%rdx) 7: 00 00 add %al,(%rax) 9: 0f 84 1f fe ff ff je 0xfffffe2e f: e8 86 9e cf ff callq 0xffcf9e9a 14: 48 83 3d c6 77 59 08 cmpq $0x0,0x85977c6(%rip) # 0x85977e2 1b: 00 1c: 0f 84 aa 00 00 00 je 0xcc 22: 48 8b 3c 24 mov (%rsp),%rdi 26: 57 push %rdi 27: 9d popfq * 28: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2d: e9 1a fe ff ff jmpq 0xfffffe4c 32: 65 ff 05 71 d4 69 7e incl %gs:0x7e69d471(%rip) # 0x7e69d4aa 39: 48 rex.W 3a: 8b .byte 0x8b 3b: 05 .byte 0x5 3c: e2 f0 loop 0x2e