BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 4562, name: syz-executor1 4 locks held by syz-executor1/4562: #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 #3: (ptrval) (&ei->i_data_sem){++++}, at: ext4_map_blocks+0x871/0x1b40 fs/ext4/inode.c:629 irq event stamp: 852350 hardirqs last enabled at (852349): [] lookup_bh_lru fs/buffer.c:1271 [inline] hardirqs last enabled at (852349): [] __find_get_block+0x2b8/0xe50 fs/buffer.c:1283 hardirqs last disabled at (852350): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (852258): [] tcp_close+0xaa4/0x12b0 net/ipv4/tcp.c:2452 softirqs last disabled at (852250): [] sock_orphan include/net/sock.h:1717 [inline] softirqs last disabled at (852250): [] tcp_close+0x6ed/0x12b0 net/ipv4/tcp.c:2387 CPU: 0 PID: 4562 Comm: syz-executor1 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:wb_wakeup_delayed+0x2f/0xf0 mm/backing-dev.c:280 RSP: 0018:ffff88019ec8eb80 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffffd9 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff81cc9819 RDX: 0000000000000004 RSI: ffffffff81a207f3 RDI: ffffffff88df5aa0 RBP: ffff88019ec8eba0 R08: ffff88019ec84200 R09: ffffed003b5c46c2 R10: ffffed003b5c46c2 R11: ffff8801dae23613 R12: ffff8801acfa6300 R13: ffff8801acfa6300 R14: ffff8801acfa6318 R15: ffff88019a8f8648 __mark_inode_dirty+0x10ce/0x1530 fs/fs-writeback.c:2218 mark_inode_dirty include/linux/fs.h:2027 [inline] dquot_alloc_space include/linux/quotaops.h:308 [inline] dquot_alloc_block include/linux/quotaops.h:325 [inline] ext4_mb_new_blocks+0x716/0x4730 fs/ext4/mballoc.c:4524 ext4_ext_map_blocks+0x2d63/0x6270 fs/ext4/extents.c:4461 ext4_map_blocks+0x8d9/0x1b40 fs/ext4/inode.c:636 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:00007ffdff71f628 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000098 RCX: 0000000000454db7 RDX: 00007ffdff720305 RSI: 00000000000001ff RDI: 00007ffdff720300 RBP: 00007ffdff71f650 R08: 0000000000000000 R09: 0000000000000005 R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000013 R13: 0000000000000000 R14: 00000000007000c0 R15: 0000000000001380 random: crng init done libceph: parse_ips bad ip '::,ile' libceph: parse_ips bad ip '::,ile' EXT4-fs (sda1): Unrecognized mount option "À" or missing value autofs4:pid:11066:autofs4_fill_super: called with bogus options gfs2: gfs2 mount does not exist gfs2: gfs2 mount does not exist