BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 4580, name: syz-executor3 3 locks held by syz-executor3/4580: #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: 868636 hardirqs last enabled at (868635): [] slab_alloc mm/slab.c:3385 [inline] hardirqs last enabled at (868635): [] kmem_cache_alloc+0x26f/0x760 mm/slab.c:3552 hardirqs last disabled at (868636): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (868622): [] spin_unlock_bh include/linux/spinlock.h:355 [inline] softirqs last enabled at (868622): [] wb_wakeup_delayed+0xa7/0xf0 mm/backing-dev.c:284 softirqs last disabled at (868618): [] spin_lock_bh include/linux/spinlock.h:315 [inline] softirqs last disabled at (868618): [] wb_wakeup_delayed+0x67/0xf0 mm/backing-dev.c:281 CPU: 0 PID: 4580 Comm: syz-executor3 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:__sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:94 RSP: 0018:ffff8801a50178d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd9 RAX: 0000000000000000 RBX: ffff8801a5017a48 RCX: ffffffff8205f59a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff8801a50179f0 R08: ffff8801a500c040 R09: ffffed003b5c46c2 R10: 0000000000000003 R11: 0000000000000003 R12: 0000000000000001 R13: ffff8801c9841970 R14: 0000000000000000 R15: 0000000000000001 ext4_getblk+0x105/0x600 fs/ext4/inode.c:966 ext4_bread+0x8d/0x2a0 fs/ext4/inode.c:1016 ext4_append+0x14e/0x370 fs/ext4/namei.c:66 ext4_init_new_dir fs/ext4/namei.c:2588 [inline] ext4_mkdir+0x52a/0xe50 fs/ext4/namei.c:2635 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:00007ffd8029a908 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000089 RCX: 0000000000454db7 RDX: 00007ffd8029b5e5 RSI: 00000000000001ff RDI: 00007ffd8029b5e0 RBP: 00007ffd8029a930 R08: 0000000000000000 R09: 0000000000000005 R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000013 R13: 0000000000000000 R14: 00000000007000c0 R15: 0000000000001380 random: crng init done sctp: [Deprecated]: syz-executor5 (pid 9778) Use of int in maxseg socket option. Use struct sctp_assoc_value instead rpcbind: RPC call returned error 22 devpts: called with bogus options tmpfs: No value for mount option 'f' tmpfs: No value for mount option 'f' rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 gfs2: gfs2 mount does not exist gfs2: gfs2 mount does not exist autofs4:pid:10514:autofs4_fill_super: called with bogus options autofs4:pid:10514:autofs4_fill_super: called with bogus options IPVS: ftp: loaded support on port[0] = 21