Memory cgroup out of memory: Kill process 945 (syz-executor2) score 1106 or sacrifice child Killed process 945 (syz-executor2) total-vm:70736kB, anon-rss:2216kB, file-rss:33552kB, shmem-rss:0kB oom_reaper: reaped process 945 (syz-executor2), now anon-rss:0kB, file-rss:32784kB, shmem-rss:0kB rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=274661, q=1107) rcu: All QSes seen, last rcu_preempt kthread activity 10290 (4295166354-4295156064), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor2 R running task 11768 6816 6134 0x00000002 Call Trace: sched_show_task.cold.84+0x2b6/0x30a kernel/sched/core.c:5293 print_other_cpu_stall.cold.66+0x7dd/0x8bb kernel/rcu/tree.c:1286 check_cpu_stall kernel/rcu/tree.c:1415 [inline] rcu_pending kernel/rcu/tree.c:2961 [inline] rcu_check_callbacks+0xfd7/0x13f0 kernel/rcu/tree.c:2506 update_process_times+0x2d/0x70 kernel/time/timer.c:1636 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:check_memory_region+0xc2/0x1b0 mm/kasan/kasan.c:268 Code: 0f 84 a8 00 00 00 48 83 38 00 74 ed 4c 8d 40 08 eb 09 48 83 c0 01 49 39 c0 74 0a 80 38 00 74 f2 48 85 c0 75 77 5b 41 5c 41 5d <5d> c3 41 bd 08 00 00 00 4d 89 c8 41 29 dd 4b 8d 5c 0d 00 eb 0c 49 RSP: 0018:ffff88817a3d5fa8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffed103b5e5b60 RBX: 1ffff1102f47abfa RCX: ffffffff816a8282 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8881daf2daf8 RBP: ffff88817a3d5fa8 R08: ffffed103b5e5b60 R09: ffffed103b5e5b5f R10: ffffed103b5e5b5f R11: ffff8881daf2dafb R12: ffff8881daf2da40 R13: ffff88817a3d6030 R14: ffff8881daf2daf8 R15: ffff8881c4b51138 kasan_check_read+0x11/0x20 mm/kasan/kasan.c:272 atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 kernel/rcu/tree.c:292 rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:906 rcu_read_lock_sched_held+0x91/0x180 kernel/rcu/update.c:112 trace_mm_shrink_slab_start include/trace/events/vmscan.h:196 [inline] do_shrink_slab+0xbad/0xd30 mm/vmscan.c:532 shrink_slab_memcg mm/vmscan.c:622 [inline] shrink_slab+0x6f6/0x8c0 mm/vmscan.c:694 shrink_node+0x431/0x16b0 mm/vmscan.c:2758 shrink_zones mm/vmscan.c:2987 [inline] do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3049 try_to_free_mem_cgroup_pages+0x4cf/0xcd0 mm/vmscan.c:3350 try_charge+0x521/0x1700 mm/memcontrol.c:2211 mem_cgroup_try_charge+0x627/0xe20 mm/memcontrol.c:5890 mem_cgroup_try_charge_delay+0x1d/0xa0 mm/memcontrol.c:5905 shmem_getpage_gfp+0x186b/0x4840 mm/shmem.c:1790 shmem_getpage mm/shmem.c:132 [inline] shmem_write_begin+0x10a/0x1e0 mm/shmem.c:2385 generic_perform_write+0x3aa/0x6a0 mm/filemap.c:3140 __generic_file_write_iter+0x26e/0x630 mm/filemap.c:3265 generic_file_write_iter+0x34d/0x6b0 mm/filemap.c:3293 call_write_iter include/linux/fs.h:1857 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6b8/0x9f0 fs/read_write.c:487 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_pwrite64+0x181/0x1b0 fs/read_write.c:652 __do_sys_pwrite64 fs/read_write.c:662 [inline] __se_sys_pwrite64 fs/read_write.c:659 [inline] __x64_sys_pwrite64+0x97/0xf0 fs/read_write.c:659 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411207 Code: 12 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 51 17 00 00 c3 48 83 ec 08 e8 27 fa ff ff 48 89 04 24 49 89 ca b8 12 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 6d fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fea04740a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00000000200019d0 RCX: 0000000000411207 RDX: 0000000008100000 RSI: 0000000020000580 RDI: 000000000000000c RBP: 0000000000000000 R08: 0000000020001a68 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000000c R13: 0000000000000007 R14: 00000000004d8d20 R15: 00000000ffffffff rcu: rcu_preempt kthread starved for 10420 jiffies! g274661 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 22392 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_timeout+0x140/0x260 kernel/time/timer.c:1804 rcu_gp_fqs_loop+0x762/0xa80 kernel/rcu/tree.c:1934 rcu_gp_kthread+0x341/0xc70 kernel/rcu/tree.c:2090 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352