audit: type=1804 audit(1592027907.900:452): pid=30303 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir728288242/syzkaller.5C69c1/1741/bus" dev="sda1" ino=17384 res=1 rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=316357, q=115) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295118051-4295107548), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.5 R running task 26480 30328 6806 0x00000000 Call Trace: sched_show_task.cold+0x334/0x395 kernel/sched/core.c:5338 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+0xaf0/0xddc kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1638 tick_sched_handle.isra.0+0x91/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0x44/0x130 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x2ec/0xd20 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:bytes_is_nonzero mm/kasan/kasan.c:167 [inline] RIP: 0010:memory_is_nonzero mm/kasan/kasan.c:184 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/kasan.c:210 [inline] RIP: 0010:memory_is_poisoned mm/kasan/kasan.c:241 [inline] RIP: 0010:check_memory_region_inline mm/kasan/kasan.c:257 [inline] RIP: 0010:check_memory_region+0x105/0x180 mm/kasan/kasan.c:267 Code: 00 74 ee 4a 8d 04 23 4d 85 c0 75 25 49 89 e9 49 29 c1 e9 74 ff ff ff 4d 85 c9 74 be 49 01 d9 eb 09 48 83 c0 01 4c 39 c8 74 b0 <80> 38 00 74 f2 eb a4 4c 89 c0 49 39 c2 74 4b 5b 5d 41 5c e9 93 0f RSP: 0018:ffff88820c43f170 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: fffffbfff11424d8 RBX: fffffbfff11424d8 RCX: ffffffff8150e2d0 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff88a126c0 RBP: fffffbfff11424d9 R08: ffff888025216280 R09: fffffbfff11424d9 R10: fffffbfff11424d8 R11: ffffffff88a126c3 R12: 0000000000000000 R13: ffff8880477d1200 R14: ffff88820c43f280 R15: ffff88820c43f280 atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] queued_spin_is_locked include/asm-generic/qspinlock.h:35 [inline] debug_spin_unlock kernel/locking/spinlock_debug.c:98 [inline] do_raw_spin_unlock+0x50/0x260 kernel/locking/spinlock_debug.c:134 __raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock+0x1f/0x40 kernel/locking/spinlock.c:176 spin_unlock include/linux/spinlock.h:369 [inline] find_inode_nowait+0x15d/0x190 fs/inode.c:1437 ext4_update_other_inodes_time fs/ext4/inode.c:5237 [inline] ext4_do_update_inode fs/ext4/inode.c:5363 [inline] ext4_mark_iloc_dirty+0x2080/0x2c00 fs/ext4/inode.c:5905 ext4_mark_inode_dirty+0x21e/0x890 fs/ext4/inode.c:6099 ext4_dirty_inode+0x88/0xb0 fs/ext4/inode.c:6130 __mark_inode_dirty+0x16b/0x1260 fs/fs-writeback.c:2176 mark_inode_dirty include/linux/fs.h:2083 [inline] __generic_write_end+0x26a/0x300 fs/buffer.c:2129 ext4_da_write_end+0x63e/0xad0 fs/ext4/inode.c:3193 generic_perform_write+0x2ae/0x4d0 mm/filemap.c:3173 __generic_file_write_iter+0x24c/0x610 mm/filemap.c:3287 ext4_file_write_iter+0x2fe/0xf60 fs/ext4/file.c:272 call_write_iter include/linux/fs.h:1821 [inline] do_iter_readv_writev+0x50c/0x790 fs/read_write.c:681 do_iter_write fs/read_write.c:960 [inline] do_iter_write+0x185/0x5e0 fs/read_write.c:941 vfs_iter_write+0x70/0xa0 fs/read_write.c:973 iter_file_splice_write+0x60c/0xb30 fs/splice.c:750 do_splice_from fs/splice.c:852 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1025 splice_direct_to_actor+0x33f/0x8d0 fs/splice.c:980 do_splice_direct+0x1a8/0x270 fs/splice.c:1068 do_sendfile+0x549/0xc10 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1502 [inline] __se_sys_sendfile64+0xc4/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45ca69 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb1244a2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00000000004fcec0 RCX: 000000000045ca69 RDX: 00000000200001c0 RSI: 0000000000000003 RDI: 0000000000000003 RBP: 000000000078c040 R08: 0000000000000000 R09: 0000000000000000 R10: 00008080fffffffe R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000008f3 R14: 00000000004cbc4a R15: 00007fb1244a36d4 rcu: rcu_preempt kthread starved for 10550 jiffies! g316357 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29104 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x8a2/0x1fc0 kernel/sched/core.c:3515 schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x4c1/0xed0 kernel/time/timer.c:1806 rcu_gp_kthread+0xf94/0x2050 kernel/rcu/tree.c:2202 kthread+0x30b/0x410 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415