BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 4795, name: syz-executor6 4 locks held by syz-executor6/4795: #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) (&type->i_mutex_dir_key){++++}, at: inode_lock include/linux/fs.h:713 [inline] #2: (ptrval) (&type->i_mutex_dir_key){++++}, at: vfs_rmdir+0xe0/0x470 fs/namei.c:3840 #3: (ptrval) (jbd2_handle){++++}, at: start_this_handle+0x581/0x1250 fs/jbd2/transaction.c:385 irq event stamp: 898972 hardirqs last enabled at (898971): [] lookup_bh_lru fs/buffer.c:1271 [inline] hardirqs last enabled at (898971): [] __find_get_block+0x2b8/0xe50 fs/buffer.c:1283 hardirqs last disabled at (898972): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (898836): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (898817): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (898817): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4795 Comm: syz-executor6 Not tainted 4.17.0-rc2+ #23 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:__ext4_handle_dirty_metadata+0x1f4/0x590 fs/ext4/ext4_jbd2.c:315 RSP: 0018:ffff88019b6f7758 EFLAGS: 00000293 ORIG_RAX: ffffffffffffffd9 RAX: 0000000000000000 RBX: ffff8801ce5463b0 RCX: ffffffff81fef6a7 RDX: 0000000000000000 RSI: ffffffff81fef6b8 RDI: 0000000000000005 RBP: ffff88019b6f7768 R08: ffff8801ac962100 R09: fffffbfff11824d8 R10: fffffbfff11824d8 R11: ffffffff88c126c3 R12: 0000000000004081 R13: 0000000000000010 R14: ffff8801c9abe85c R15: 0000000000000000 ext4_do_update_inode fs/ext4/inode.c:5225 [inline] ext4_mark_iloc_dirty+0x1856/0x2e90 fs/ext4/inode.c:5741 ext4_orphan_add+0x687/0xda0 fs/ext4/namei.c:2802 ext4_rmdir+0x7f4/0xd20 fs/ext4/namei.c:2969 vfs_rmdir+0x251/0x470 fs/namei.c:3851 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:00007fff14fce2a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00000000004556e7 RDX: 0000000000000000 RSI: 00007fff14fd0050 RDI: 00007fff14fd0050 RBP: 00007fff14fd0050 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000015fd940 R13: 0000000000000000 R14: 00000000000001df R15: 000000000001e7a7 random: crng init done gfs2: gfs2 mount does not exist “‘hMþ=ôå=²¨: renamed from lo gfs2: gfs2 mount does not exist