BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 9059, name: syz-executor2 3 locks held by syz-executor2/9059: #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) (sb_internal){.+.+}, at: sb_start_intwrite include/linux/fs.h:1597 [inline] #1: (ptrval) (sb_internal){.+.+}, at: ext4_evict_inode+0x720/0x1aa0 fs/ext4/inode.c:250 #2: (ptrval) (jbd2_handle){++++}, at: start_this_handle+0x581/0x1250 fs/jbd2/transaction.c:385 irq event stamp: 311848 hardirqs last enabled at (311847): [] lookup_bh_lru fs/buffer.c:1271 [inline] hardirqs last enabled at (311847): [] __find_get_block+0x2b8/0xe50 fs/buffer.c:1283 hardirqs last disabled at (311848): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (311844): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (311837): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (311837): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 9059 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:__write_once_size include/linux/compiler.h:215 [inline] RIP: 0010:write_comp_data+0x6c/0x70 kernel/kcov.c:144 RSP: 0018:ffff8801a89bed40 EFLAGS: 00000293 ORIG_RAX: ffffffffffffffd9 RAX: 0000000000000000 RBX: 1ffff10035137daf RCX: ffffffff819b7012 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007 RBP: ffff8801a89bed40 R08: ffff8801ab546280 R09: ffffed003b5c46c2 R10: ffffed003b5c46c2 R11: ffff8801dae23613 R12: ffffea0006e99240 R13: ffff8801a89bf018 R14: ffffea0006e99260 R15: ffffea0006e99240 __sanitizer_cov_trace_const_cmp8+0x18/0x20 kernel/kcov.c:195 compound_head include/linux/page-flags.h:144 [inline] PageActive include/linux/page-flags.h:281 [inline] mark_page_accessed+0x1f2/0xd10 mm/swap.c:379 touch_buffer fs/buffer.c:59 [inline] __find_get_block+0x360/0xe50 fs/buffer.c:1291 __getblk_gfp+0xd6/0xaf0 fs/buffer.c:1309 sb_getblk include/linux/buffer_head.h:327 [inline] __ext4_get_inode_loc+0x4c5/0x14a0 fs/ext4/inode.c:4526 ext4_get_inode_loc fs/ext4/inode.c:4639 [inline] ext4_reserve_inode_write+0xf8/0x260 fs/ext4/inode.c:5760 ext4_mark_inode_dirty+0x177/0xb20 fs/ext4/inode.c:5912 ext4_evict_inode+0xbfc/0x1aa0 fs/ext4/inode.c:329 evict+0x4a6/0x960 fs/inode.c:557 iput_final fs/inode.c:1519 [inline] iput+0x62d/0xa80 fs/inode.c:1545 do_unlinkat+0x71f/0xa10 fs/namei.c:4039 __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:00007fff5e6a2c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004556c7 RDX: 0000000000ab7a13 RSI: 00007fff5e6a2cc0 RDI: 00007fff5e6a2cc0 RBP: 00007fff5e6a49d0 R08: 0000000000000000 R09: 000000000000000f R10: 000000000000000a R11: 0000000000000206 R12: 0000000000ab7940 R13: 0000000000000000 R14: 0000000000000090 R15: 000000000001e2ab random: crng init done 9pnet_virtio: no channels available for device ./file0 9pnet_virtio: no channels available for device ./file0 sctp: [Deprecated]: syz-executor7 (pid 11464) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead