BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 4527, name: syz-executor6 4 locks held by syz-executor6/4527: #0: (ptrval) (&type->i_mutex_dir_key){++++}, at: iterate_dir+0xd4/0x5d0 fs/readdir.c:41 #1: (ptrval) (sb_writers#4){.+.+}, at: sb_start_write_trylock include/linux/fs.h:1555 [inline] #1: (ptrval) (sb_writers#4){.+.+}, at: touch_atime+0x15f/0x310 fs/inode.c:1729 #2: (ptrval) (jbd2_handle){.+.+}, at: start_this_handle+0x581/0x1250 fs/jbd2/transaction.c:385 #3: (ptrval) (&(&ei->i_raw_lock)->rlock){+.+.}, at: spin_lock include/linux/spinlock.h:310 [inline] #3: (ptrval) (&(&ei->i_raw_lock)->rlock){+.+.}, at: ext4_do_update_inode fs/ext4/inode.c:5120 [inline] #3: (ptrval) (&(&ei->i_raw_lock)->rlock){+.+.}, at: ext4_mark_iloc_dirty+0x295/0x2e90 fs/ext4/inode.c:5741 irq event stamp: 842724 hardirqs last enabled at (842723): [] lookup_bh_lru fs/buffer.c:1271 [inline] hardirqs last enabled at (842723): [] __find_get_block+0x2b8/0xe50 fs/buffer.c:1283 hardirqs last disabled at (842724): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (842602): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (842447): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (842447): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4527 Comm: syz-executor6 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_do_update_inode fs/ext4/inode.c:5206 [inline] RIP: 0010:ext4_mark_iloc_dirty+0x1edf/0x2e90 fs/ext4/inode.c:5741 RSP: 0018:ffff8801a05cf560 EFLAGS: 00000297 ORIG_RAX: ffffffffffffffd5 RAX: 00000000ffffffff RBX: ffff8801c9af8430 RCX: ffffffff8206e30c RDX: 0000000000000008 RSI: 00000000ffffffff RDI: 0000000000000007 RBP: ffff8801a05cf728 R08: ffff8801a05c4340 R09: ffffed003935f0fd R10: ffffed003935f0fd R11: ffff8801c9af87eb R12: ffff8801c1cb3d00 R13: 0000000000000008 R14: ffff8801c9af8820 R15: 0000000000000000 ext4_mark_inode_dirty+0x23b/0xb20 fs/ext4/inode.c:5920 ext4_dirty_inode+0x97/0xc0 fs/ext4/inode.c:5951 __mark_inode_dirty+0x811/0x1530 fs/fs-writeback.c:2129 generic_update_time+0x255/0x420 fs/inode.c:1656 update_time fs/inode.c:1672 [inline] touch_atime+0x292/0x310 fs/inode.c:1744 file_accessed include/linux/fs.h:2063 [inline] iterate_dir+0x394/0x5d0 fs/readdir.c:56 __do_sys_getdents fs/readdir.c:231 [inline] __se_sys_getdents fs/readdir.c:212 [inline] __x64_sys_getdents+0x293/0x4e0 fs/readdir.c:212 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x453e7b RSP: 002b:00007ffd24920700 EFLAGS: 00000206 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00000000026f3970 RCX: 0000000000453e7b RDX: 0000000000008000 RSI: 00000000026f3970 RDI: 0000000000000013 RBP: 00000000026f3970 R08: 0000000000000001 R09: 00000000026f2940 R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffffd4 R13: 0000000000000016 R14: 00000000000001a4 R15: 000000000001d514 random: crng init done EXT4-fs (sda1): re-mounted. Opts: EXT4-fs (sda1): re-mounted. Opts: tmpfs: No value for mount option '­•eXý˜ø^xyCÖmqÙ¨‹ÿ ƒ×í' tmpfs: No value for mount option '­•eXý˜ø^xyCÖmqÙ¨‹ÿ ƒ×í' libceph: parse_ips bad ip '::file' libceph: parse_ips bad ip '::file' sock: process `syz-executor0' is using obsolete setsockopt SO_BSDCOMPAT