BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 8212, name: syz-executor2 3 locks held by syz-executor2/8212: #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: filename_create+0x1aa/0x5a0 fs/namei.c:3606 #2: (ptrval) (jbd2_handle){++++}, at: start_this_handle+0x581/0x1250 fs/jbd2/transaction.c:385 irq event stamp: 353068 hardirqs last enabled at (353067): [] lookup_bh_lru fs/buffer.c:1271 [inline] hardirqs last enabled at (353067): [] __find_get_block+0x2b8/0xe50 fs/buffer.c:1283 hardirqs last disabled at (353068): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (353046): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (353037): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (353037): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 8212 Comm: syz-executor2 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:add_dirent_to_buf+0x29/0x6a0 fs/ext4/namei.c:1851 RSP: 0018:ffff8801a5f17a40 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffffd9 RAX: 1ffff10034be2f33 RBX: ffff88019c5d8000 RCX: ffff8801a92a34b0 RDX: ffff88019c6e9830 RSI: ffff8801a5f17b30 RDI: ffff8801da42a9c0 RBP: ffff8801a5f17a68 R08: 0000000000000000 R09: ffff88019c5d8000 R10: ffffed003b5c46c2 R11: ffff8801dae23613 R12: ffff8801a92a34b0 R13: dffffc0000000000 R14: ffff88019c5d8000 R15: 0000000000000000 ext4_add_entry+0x56d/0xbf0 fs/ext4/namei.c:2082 ext4_mkdir+0x7d0/0xe50 fs/ext4/namei.c:2640 vfs_mkdir+0x42e/0x6b0 fs/namei.c:3787 do_mkdirat+0x266/0x2f0 fs/namei.c:3810 __do_sys_mkdir fs/namei.c:3826 [inline] __se_sys_mkdir fs/namei.c:3824 [inline] __x64_sys_mkdir+0x5c/0x80 fs/namei.c:3824 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x454db7 RSP: 002b:00007ffed9beee78 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000025 RCX: 0000000000454db7 RDX: 00007ffed9befb54 RSI: 00000000000001ff RDI: 00007ffed9befb50 RBP: 00007ffed9beeea0 R08: 0000000000000000 R09: 0000000000000004 R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000013 R13: 0000000000000000 R14: 00000000007000c0 R15: 0000000000001380 random: crng init done can: request_module (can-proto-5) failed. can: request_module (can-proto-5) failed. ceph: device name is missing path (no : separator in ./file0) ceph: device name is missing path (no : separator in ./file0) 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 IPVS: ftp: loaded support on port[0] = 21 EXT4-fs (sda1): re-mounted. Opts: (null)