======================================================
WARNING: possible circular locking dependency detected
5.14.0-rc1-syzkaller #0 Not tainted
------------------------------------------------------
syz-execprog/8444 is trying to acquire lock:
ffffffff8ba9c5e0 (fs_reclaim){+.+.}-{0:0}, at: fs_reclaim_acquire+0xf7/0x160 mm/page_alloc.c:4574
but task is already holding lock:
ffff8880b9d4d660 (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:687
mmdrop include/linux/sched/mm.h:49 [inline]
finish_task_switch.isra.0+0x6da/0xa50 kernel/sched/core.c:4582
context_switch kernel/sched/core.c:4686 [inline]
__schedule+0x942/0x26f0 kernel/sched/core.c:5940
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6328
irqentry_exit+0x31/0x80 kernel/entry/common.c:427
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
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
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
__pte_alloc_one include/asm-generic/pgalloc.h:63 [inline]
pte_alloc_one+0x16/0x230 arch/x86/mm/pgtable.c:33
do_fault_around mm/memory.c:4136 [inline]
do_read_fault mm/memory.c:4157 [inline]
do_fault mm/memory.c:4291 [inline]
handle_pte_fault mm/memory.c:4549 [inline]
__handle_mm_fault+0x49de/0x5320 mm/memory.c:4684
handle_mm_fault+0x1c8/0x790 mm/memory.c:4782
do_user_addr_fault+0x48b/0x11c0 arch/x86/mm/fault.c:1390
handle_page_fault arch/x86/mm/fault.c:1475 [inline]
exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1531
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
-> #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:198 [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:1577
kernel_init+0x1a/0x1d0 init/main.c:1485
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_user+0x67/0x80 mm/vmalloc.c:3101
kcov_mmap+0x2b/0x140 kernel/kcov.c:465
call_mmap include/linux/fs.h:2119 [inline]
mmap_region+0xcde/0x1760 mm/mmap.c:1808
do_mmap+0x86e/0x1180 mm/mmap.c:1584
vm_mmap_pgoff+0x1b7/0x290 mm/util.c:519
ksys_mmap_pgoff+0x4a8/0x620 mm/mmap.c:1635
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 ***
2 locks held by syz-execprog/8444:
#0: ffff888013dcf828 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
#0: ffff888013dcf828 (&mm->mmap_lock#2){++++}-{3:3}, at: vm_mmap_pgoff+0x15c/0x290 mm/util.c:517
#1: ffff8880b9d4d660 (lock#2){-.-.}-{2:2}, at: __alloc_pages_bulk+0x4ad/0x1870 mm/page_alloc.c:5279
stack backtrace:
CPU: 1 PID: 8444 Comm: syz-execprog Not tainted 5.14.0-rc1-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_user+0x67/0x80 mm/vmalloc.c:3101
kcov_mmap+0x2b/0x140 kernel/kcov.c:465
call_mmap include/linux/fs.h:2119 [inline]
mmap_region+0xcde/0x1760 mm/mmap.c:1808
do_mmap+0x86e/0x1180 mm/mmap.c:1584
vm_mmap_pgoff+0x1b7/0x290 mm/util.c:519
ksys_mmap_pgoff+0x4a8/0x620 mm/mmap.c:1635
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: 0033:0x4b132a
Code: e8 db 57 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 4c 8b 54 24 28 4c 8b 44 24 30 4c 8b 4c 24 38 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 40 ff ff ff ff 48 c7 44 24 48
RSP: 002b:000000c00030ba10 EFLAGS: 00000202 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 000000c000020800 RCX: 00000000004b132a
RDX: 0000000000000003 RSI: 0000000000080000 RDI: 0000000000000000
RBP: 000000c00030ba70 R08: 0000000000000006 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000202 R12: 000000000072903a
R13: 000000000000019e R14: 0000000000000200 R15: 0000000000000100
BUG: sleeping function called from invalid context at mm/page_alloc.c:5167
in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 8444, name: syz-execprog
INFO: lockdep is turned off.
irq event stamp: 9266
hardirqs last enabled at (9265): [<ffffffff892c5f10>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
hardirqs last enabled at (9265): [<ffffffff892c5f10>] _raw_spin_unlock_irqrestore+0x50/0x70 kernel/locking/spinlock.c:191
hardirqs last disabled at (9266): [<ffffffff81b270d7>] __alloc_pages_bulk+0x1017/0x1870 mm/page_alloc.c:5279
softirqs last enabled at (7828): [<ffffffff814628be>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last enabled at (7828): [<ffffffff814628be>] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636
softirqs last disabled at (7823): [<ffffffff814628be>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last disabled at (7823): [<ffffffff814628be>] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636
CPU: 1 PID: 8444 Comm: syz-execprog Not tainted 5.14.0-rc1-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+0x1f1/0x237 kernel/sched/core.c:9154
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_user+0x67/0x80 mm/vmalloc.c:3101
kcov_mmap+0x2b/0x140 kernel/kcov.c:465
call_mmap include/linux/fs.h:2119 [inline]
mmap_region+0xcde/0x1760 mm/mmap.c:1808
do_mmap+0x86e/0x1180 mm/mmap.c:1584
vm_mmap_pgoff+0x1b7/0x290 mm/util.c:519
ksys_mmap_pgoff+0x4a8/0x620 mm/mmap.c:1635
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: 0033:0x4b132a
Code: e8 db 57 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 4c 8b 54 24 28 4c 8b 44 24 30 4c 8b 4c 24 38 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 40 ff ff ff ff 48 c7 44 24 48
RSP: 002b:000000c00030ba10 EFLAGS: 00000202 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 000000c000020800 RCX: 00000000004b132a
RDX: 0000000000000003 RSI: 0000000000080000 RDI: 0000000000000000
RBP: 000000c00030ba70 R08: 0000000000000006 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000202 R12: 000000000072903a
R13: 000000000000019e R14: 0000000000000200 R15: 0000000000000100