BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 4508, name: syz-executor0 4 locks held by syz-executor0/4508: #0: (ptrval) (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1550 [inline] #0: (ptrval) (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: (ptrval) (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:748 [inline] #1: (ptrval) (&type->i_mutex_dir_key/1){+.+.}, at: do_rmdir+0x37b/0x610 fs/namei.c:3899 #2: (ptrval) (sb_internal){.+.+}, at: sb_start_intwrite include/linux/fs.h:1597 [inline] #2: (ptrval) (sb_internal){.+.+}, at: ext4_evict_inode+0x720/0x1aa0 fs/ext4/inode.c:250 #3: (ptrval) (jbd2_handle){.+.+}, at: start_this_handle+0x581/0x1250 fs/jbd2/transaction.c:385 irq event stamp: 534010 hardirqs last enabled at (534009): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (534009): [] _raw_spin_unlock_irq+0x27/0x70 kernel/locking/spinlock.c:192 hardirqs last disabled at (534010): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (533682): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (533675): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (533675): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4508 Comm: syz-executor0 Not tainted 4.17.0-rc2+ #24 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+0x1b9/0x294 lib/dump_stack.c:113 ___might_sleep.cold.87+0x11f/0x13a kernel/sched/core.c:6188 __might_sleep+0x95/0x190 kernel/sched/core.c:6141 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3716 [inline] __kmalloc+0x2b9/0x760 mm/slab.c:3727 kmalloc_array include/linux/slab.h:631 [inline] kcalloc include/linux/slab.h:642 [inline] numa_crng_init drivers/char/random.c:798 [inline] crng_reseed+0x427/0x920 drivers/char/random.c:923 credit_entropy_bits+0x98d/0xa30 drivers/char/random.c:708 add_interrupt_randomness+0x494/0x860 drivers/char/random.c:1254 handle_irq_event_percpu+0xf9/0x1c0 kernel/irq/handle.c:191 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77 do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:642 RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:793 [inline] RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 kernel/locking/spinlock.c:192 RSP: 0018:ffff8801d0b0ef18 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffd5 RAX: dffffc0000000000 RBX: ffff8801daf2c580 RCX: 1ffff1003a160a02 RDX: 1ffffffff11a315f RSI: ffff8801d0b04ff0 RDI: ffffffff88d18af8 RBP: ffff8801d0b0ef20 R08: ffff8801d0b04f78 R09: 0000000000000006 R10: ffff8801d0b04740 R11: 0000000000000000 R12: ffff8801d0b04740 R13: ffff8801b5bdc500 R14: 0000000000000000 R15: ffff8801d0b04740 finish_lock_switch kernel/sched/core.c:2603 [inline] finish_task_switch+0x1ca/0x810 kernel/sched/core.c:2701 context_switch kernel/sched/core.c:2851 [inline] __schedule+0x809/0x1e30 kernel/sched/core.c:3490 preempt_schedule_common+0x22/0x60 kernel/sched/core.c:3629 _cond_resched+0x1d/0x30 kernel/sched/core.c:4978 ext4_mark_inode_dirty+0x119/0xb20 fs/ext4/inode.c:5910 ext4_truncate+0x629/0x1640 fs/ext4/inode.c:4486 ext4_evict_inode+0xb4b/0x1aa0 fs/ext4/inode.c:289 evict+0x4a6/0x960 fs/inode.c:557 iput_final fs/inode.c:1519 [inline] iput+0x62d/0xa80 fs/inode.c:1545 dentry_unlink_inode+0x49a/0x620 fs/dcache.c:376 d_delete+0x1d7/0x220 fs/dcache.c:2426 vfs_rmdir+0x38b/0x470 fs/namei.c:3863 do_rmdir+0x523/0x610 fs/namei.c:3911 __do_sys_rmdir fs/namei.c:3929 [inline] __se_sys_rmdir fs/namei.c:3927 [inline] __x64_sys_rmdir+0x36/0x40 fs/namei.c:3927 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4556e7 RSP: 002b:00007fff3aaa2dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00000000004556e7 RDX: 0000000000000000 RSI: 00007fff3aaa4b80 RDI: 00007fff3aaa4b80 RBP: 00007fff3aaa4b80 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001c79940 R13: 0000000000000000 R14: 0000000000000112 R15: 00000000000167ae random: crng init done