BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 6442, name: syz-executor5 4 locks held by syz-executor5/6442: #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_unlinkat+0x3c4/0xa10 fs/namei.c:4019 #2: (ptrval) (&sb->s_type->i_mutex_key#10){+.+.}, at: inode_lock include/linux/fs.h:713 [inline] #2: (ptrval) (&sb->s_type->i_mutex_key#10){+.+.}, at: vfs_unlink+0xd1/0x510 fs/namei.c:3961 #3: (ptrval) (jbd2_handle){.+.+}, at: start_this_handle+0x581/0x1250 fs/jbd2/transaction.c:385 irq event stamp: 620010 hardirqs last enabled at (620009): [] slab_alloc mm/slab.c:3385 [inline] hardirqs last enabled at (620009): [] kmem_cache_alloc+0x26f/0x760 mm/slab.c:3552 hardirqs last disabled at (620010): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (619316): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (619309): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (619309): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 6442 Comm: syz-executor5 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:__ext4_journal_get_write_access+0x0/0xa0 fs/ext4/ext4_jbd2.c:122 RSP: 0018:ffff8801a21ff980 EFLAGS: 00000293 ORIG_RAX: ffffffffffffffd9 RAX: ffff8801d0268000 RBX: ffff8801c57ca2b0 RCX: ffff8801c56d0888 RDX: ffff88019e64d280 RSI: 0000000000000934 RDI: ffffffff87d8bd20 RBP: ffff8801a21ffa30 R08: ffff8801d0268000 R09: ffffed003b5c46c2 R10: ffffed003b5c46c2 R11: ffff8801dae23613 R12: 1ffff1003443ff35 R13: ffff8801c56d0888 R14: ffff8801cc506540 R15: ffff8801c57ca2d8 ext4_unlink+0x620/0x11e0 fs/ext4/namei.c:3033 vfs_unlink+0x2db/0x510 fs/namei.c:3970 do_unlinkat+0x6b8/0xa10 fs/namei.c:4033 __do_sys_unlink fs/namei.c:4080 [inline] __se_sys_unlink fs/namei.c:4078 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4078 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4556c7 RSP: 002b:00007ffdc44cf888 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004556c7 RDX: 00000000022779b3 RSI: 00007ffdc44cf920 RDI: 00007ffdc44cf920 RBP: 00007ffdc44d1630 R08: 0000000000000000 R09: 000000000000000c R10: 0000000000000006 R11: 0000000000000206 R12: 0000000002277940 R13: 0000000000000000 R14: 0000000000000174 R15: 000000000001e825 random: crng init done gfs2: gfs2 mount does not exist “‘hMþ=ôå=²¨: renamed from lo gfs2: gfs2 mount does not exist IPVS: ftp: loaded support on port[0] = 21 rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir'