====================================================== WARNING: possible circular locking dependency detected 5.14.0-rc1-next-20210715-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/10753 is trying to acquire lock: ffffffff8ba9f4a0 (fs_reclaim){+.+.}-{0:0}, at: fs_reclaim_acquire+0xf7/0x160 mm/page_alloc.c:4574 but task is already holding lock: ffff8880b9c4d660 (lock#2){-.-.}-{2:2}, at: __alloc_pages_bulk+0x4ad/0x1870 mm/page_alloc.c:5279 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (lock#2){-.-.}-{2:2}: local_lock_acquire include/linux/local_lock_internal.h:42 [inline] free_unref_page+0x1bf/0x690 mm/page_alloc.c:3427 mm_free_pgd kernel/fork.c:636 [inline] __mmdrop+0xcb/0x3f0 kernel/fork.c:738 mmdrop include/linux/sched/mm.h:49 [inline] mmdrop_lazy_tlb include/linux/sched/mm.h:62 [inline] finish_task_switch.isra.0+0x6bf/0xa20 kernel/sched/core.c:4587 context_switch kernel/sched/core.c:4703 [inline] __schedule+0x942/0x26f0 kernel/sched/core.c:5957 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6345 irqentry_exit+0x31/0x80 kernel/entry/common.c:427 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:629 lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5593 fs_reclaim_acquire mm/page_alloc.c:4569 [inline] fs_reclaim_acquire+0xd2/0x160 mm/page_alloc.c:4560 might_alloc include/linux/sched/mm.h:219 [inline] slab_pre_alloc_hook mm/slab.h:485 [inline] slab_alloc_node mm/slub.c:2902 [inline] slab_alloc mm/slub.c:2989 [inline] __kmalloc+0x58/0x330 mm/slub.c:4133 kmalloc include/linux/slab.h:596 [inline] kzalloc include/linux/slab.h:721 [inline] tomoyo_commit_ok+0x1e/0x90 security/tomoyo/memory.c:76 tomoyo_assign_domain+0x575/0x770 security/tomoyo/domain.c:576 tomoyo_find_next_domain+0x5f7/0x1f80 security/tomoyo/domain.c:847 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:101 [inline] tomoyo_bprm_check_security+0x121/0x1a0 security/tomoyo/tomoyo.c:91 security_bprm_check+0x45/0xa0 security/security.c:865 search_binary_handler fs/exec.c:1709 [inline] exec_binprm fs/exec.c:1762 [inline] bprm_execve fs/exec.c:1831 [inline] bprm_execve+0x732/0x19b0 fs/exec.c:1793 do_execveat_common+0x5e3/0x780 fs/exec.c:1920 do_execve fs/exec.c:1988 [inline] __do_sys_execve fs/exec.c:2064 [inline] __se_sys_execve fs/exec.c:2059 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:2059 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae -> #1 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}: fs_reclaim_acquire mm/page_alloc.c:4569 [inline] fs_reclaim_acquire+0xd2/0x160 mm/page_alloc.c:4560 might_alloc include/linux/sched/mm.h:219 [inline] slab_pre_alloc_hook mm/slab.h:485 [inline] slab_alloc_node mm/slub.c:2902 [inline] slab_alloc mm/slub.c:2989 [inline] kmem_cache_alloc_trace+0x3b/0x3c0 mm/slub.c:3006 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] alloc_workqueue_attrs+0x38/0x80 kernel/workqueue.c:3365 wq_numa_init kernel/workqueue.c:5899 [inline] workqueue_init+0x94/0x979 kernel/workqueue.c:6031 kernel_init_freeable+0x3fb/0x741 init/main.c:1582 kernel_init+0x1a/0x1d0 init/main.c:1490 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 -> #0 (fs_reclaim){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3051 [inline] check_prevs_add kernel/locking/lockdep.c:3174 [inline] validate_chain kernel/locking/lockdep.c:3789 [inline] __lock_acquire+0x2a07/0x54a0 kernel/locking/lockdep.c:5015 lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 __fs_reclaim_acquire mm/page_alloc.c:4552 [inline] fs_reclaim_acquire+0x117/0x160 mm/page_alloc.c:4566 prepare_alloc_pages+0x15c/0x580 mm/page_alloc.c:5164 __alloc_pages+0x12f/0x500 mm/page_alloc.c:5363 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2244 stack_depot_save+0x39d/0x4e0 lib/stackdepot.c:303 save_stack+0x15e/0x1e0 mm/page_owner.c:120 __set_page_owner+0x50/0x290 mm/page_owner.c:181 prep_new_page mm/page_alloc.c:2433 [inline] __alloc_pages_bulk+0x8b9/0x1870 mm/page_alloc.c:5301 alloc_pages_bulk_array_node include/linux/gfp.h:557 [inline] vm_area_alloc_pages mm/vmalloc.c:2793 [inline] __vmalloc_area_node mm/vmalloc.c:2863 [inline] __vmalloc_node_range+0x39d/0x960 mm/vmalloc.c:2966 __vmalloc_node mm/vmalloc.c:3015 [inline] __vmalloc_area_node mm/vmalloc.c:2846 [inline] __vmalloc_node_range+0x313/0x960 mm/vmalloc.c:2966 __vmalloc_node+0x6f/0x90 mm/vmalloc.c:3015 kvmalloc_node+0xd8/0xf0 mm/util.c:596 kvmalloc include/linux/mm.h:806 [inline] btf_parse kernel/bpf/btf.c:4300 [inline] btf_new_fd+0x50a/0x2450 kernel/bpf/btf.c:5800 bpf_btf_load kernel/bpf/syscall.c:3893 [inline] __sys_bpf+0x2761/0x53b0 kernel/bpf/syscall.c:4514 __do_sys_bpf kernel/bpf/syscall.c:4573 [inline] __se_sys_bpf kernel/bpf/syscall.c:4571 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae other info that might help us debug this: Chain exists of: fs_reclaim --> mmu_notifier_invalidate_range_start --> lock#2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(lock#2); lock(mmu_notifier_invalidate_range_start); lock(lock#2); lock(fs_reclaim); *** DEADLOCK *** 1 lock held by syz-executor.4/10753: #0: ffff8880b9c4d660 (lock#2){-.-.}-{2:2}, at: __alloc_pages_bulk+0x4ad/0x1870 mm/page_alloc.c:5279 stack backtrace: CPU: 0 PID: 10753 Comm: syz-executor.4 Not tainted 5.14.0-rc1-next-20210715-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2131 check_prev_add kernel/locking/lockdep.c:3051 [inline] check_prevs_add kernel/locking/lockdep.c:3174 [inline] validate_chain kernel/locking/lockdep.c:3789 [inline] __lock_acquire+0x2a07/0x54a0 kernel/locking/lockdep.c:5015 lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 __fs_reclaim_acquire mm/page_alloc.c:4552 [inline] fs_reclaim_acquire+0x117/0x160 mm/page_alloc.c:4566 prepare_alloc_pages+0x15c/0x580 mm/page_alloc.c:5164 __alloc_pages+0x12f/0x500 mm/page_alloc.c:5363 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2244 stack_depot_save+0x39d/0x4e0 lib/stackdepot.c:303 save_stack+0x15e/0x1e0 mm/page_owner.c:120 __set_page_owner+0x50/0x290 mm/page_owner.c:181 prep_new_page mm/page_alloc.c:2433 [inline] __alloc_pages_bulk+0x8b9/0x1870 mm/page_alloc.c:5301 alloc_pages_bulk_array_node include/linux/gfp.h:557 [inline] vm_area_alloc_pages mm/vmalloc.c:2793 [inline] __vmalloc_area_node mm/vmalloc.c:2863 [inline] __vmalloc_node_range+0x39d/0x960 mm/vmalloc.c:2966 __vmalloc_node mm/vmalloc.c:3015 [inline] __vmalloc_area_node mm/vmalloc.c:2846 [inline] __vmalloc_node_range+0x313/0x960 mm/vmalloc.c:2966 __vmalloc_node+0x6f/0x90 mm/vmalloc.c:3015 kvmalloc_node+0xd8/0xf0 mm/util.c:596 kvmalloc include/linux/mm.h:806 [inline] btf_parse kernel/bpf/btf.c:4300 [inline] btf_new_fd+0x50a/0x2450 kernel/bpf/btf.c:5800 bpf_btf_load kernel/bpf/syscall.c:3893 [inline] __sys_bpf+0x2761/0x53b0 kernel/bpf/syscall.c:4514 __do_sys_bpf kernel/bpf/syscall.c:4573 [inline] __se_sys_bpf kernel/bpf/syscall.c:4571 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff6482f7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000012 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffeb466633f R14: 00007ff6482f7300 R15: 0000000000022000 BUG: sleeping function called from invalid context at mm/page_alloc.c:5167 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 10753, name: syz-executor.4 INFO: lockdep is turned off. irq event stamp: 2218 hardirqs last enabled at (2217): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (2217): [] _raw_spin_unlock_irqrestore+0x50/0x70 kernel/locking/spinlock.c:191 hardirqs last disabled at (2218): [] __alloc_pages_bulk+0x1017/0x1870 mm/page_alloc.c:5279 softirqs last enabled at (1828): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (1828): [] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 softirqs last disabled at (1737): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (1737): [] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 CPU: 0 PID: 10753 Comm: syz-executor.4 Not tainted 5.14.0-rc1-next-20210715-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 ___might_sleep.cold+0x1f3/0x239 kernel/sched/core.c:9182 prepare_alloc_pages+0x3da/0x580 mm/page_alloc.c:5167 __alloc_pages+0x12f/0x500 mm/page_alloc.c:5363 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2244 stack_depot_save+0x39d/0x4e0 lib/stackdepot.c:303 save_stack+0x15e/0x1e0 mm/page_owner.c:120 __set_page_owner+0x50/0x290 mm/page_owner.c:181 prep_new_page mm/page_alloc.c:2433 [inline] __alloc_pages_bulk+0x8b9/0x1870 mm/page_alloc.c:5301 alloc_pages_bulk_array_node include/linux/gfp.h:557 [inline] vm_area_alloc_pages mm/vmalloc.c:2793 [inline] __vmalloc_area_node mm/vmalloc.c:2863 [inline] __vmalloc_node_range+0x39d/0x960 mm/vmalloc.c:2966 __vmalloc_node mm/vmalloc.c:3015 [inline] __vmalloc_area_node mm/vmalloc.c:2846 [inline] __vmalloc_node_range+0x313/0x960 mm/vmalloc.c:2966 __vmalloc_node+0x6f/0x90 mm/vmalloc.c:3015 kvmalloc_node+0xd8/0xf0 mm/util.c:596 kvmalloc include/linux/mm.h:806 [inline] btf_parse kernel/bpf/btf.c:4300 [inline] btf_new_fd+0x50a/0x2450 kernel/bpf/btf.c:5800 bpf_btf_load kernel/bpf/syscall.c:3893 [inline] __sys_bpf+0x2761/0x53b0 kernel/bpf/syscall.c:4514 __do_sys_bpf kernel/bpf/syscall.c:4573 [inline] __se_sys_bpf kernel/bpf/syscall.c:4571 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff6482f7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000012 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffeb466633f R14: 00007ff6482f7300 R15: 0000000000022000