Hello, syzbot found the following issue on: HEAD commit: 79160a60 Merge tag 'usb-5.14-rc1' of git://git.kernel.org/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11052e78300000 kernel config: https://syzkaller.appspot.com/x/.config?x=4c86f97408164ca1 dashboard link: https://syzkaller.appspot.com/bug?extid=0fb43da032dd2c0d2dbb IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0fb43da032dd2c0d2dbb@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: sleeping function called from invalid context at mm/page_alloc.c:5178 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 2, name: kthreadd 1 lock held by kthreadd/2: #0: ffff8880b9c31660 (lock#2){....}-{2:2}, at: __alloc_pages_bulk+0x4ad/0x1870 mm/page_alloc.c:5290 irq event stamp: 1804 hardirqs last enabled at (1803): [<ffffffff81ba1f82>] slab_alloc_node mm/slab.c:3256 [inline] hardirqs last enabled at (1803): [<ffffffff81ba1f82>] kmem_cache_alloc_node_trace+0x412/0x5d0 mm/slab.c:3617 hardirqs last disabled at (1804): [<ffffffff81b17107>] __alloc_pages_bulk+0x1017/0x1870 mm/page_alloc.c:5290 softirqs last enabled at (1716): [<ffffffff812b1cec>] memcpy include/linux/fortify-string.h:191 [inline] softirqs last enabled at (1716): [<ffffffff812b1cec>] fpu__copy+0x16c/0x660 arch/x86/kernel/fpu/core.c:241 softirqs last disabled at (1714): [<ffffffff812b1c21>] fpu__copy+0xa1/0x660 arch/x86/kernel/fpu/core.c:229 CPU: 0 PID: 2 Comm: kthreadd Not tainted 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:96 ___might_sleep.cold+0x1f1/0x237 kernel/sched/core.c:9153 prepare_alloc_pages+0x3da/0x580 mm/page_alloc.c:5178 __alloc_pages+0x12f/0x500 mm/page_alloc.c:5374 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:2444 [inline] __alloc_pages_bulk+0x8b9/0x1870 mm/page_alloc.c:5312 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 alloc_thread_stack_node kernel/fork.c:245 [inline] dup_task_struct kernel/fork.c:875 [inline] copy_process+0x8db/0x74d0 kernel/fork.c:1952 kernel_clone+0xe7/0xac0 kernel/fork.c:2509 kernel_thread+0xb5/0xf0 kernel/fork.c:2561 create_kthread kernel/kthread.c:342 [inline] kthreadd+0x4ea/0x750 kernel/kthread.c:685 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ============================================ WARNING: possible recursive locking detected 5.13.0-syzkaller #0 Tainted: G W -------------------------------------------- kthreadd/2 is trying to acquire lock: ffff8880b9c31660 (lock#2){....}-{2:2}, at: rmqueue_pcplist mm/page_alloc.c:3674 [inline] ffff8880b9c31660 (lock#2){....}-{2:2}, at: rmqueue mm/page_alloc.c:3712 [inline] ffff8880b9c31660 (lock#2){....}-{2:2}, at: get_page_from_freelist+0x486/0x2f80 mm/page_alloc.c:4174 but task is already holding lock: ffff8880b9c31660 (lock#2){....}-{2:2}, at: __alloc_pages_bulk+0x4ad/0x1870 mm/page_alloc.c:5290 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(lock#2); lock(lock#2); *** DEADLOCK *** May be due to missing lock nesting notation 1 lock held by kthreadd/2: #0: ffff8880b9c31660 (lock#2){....}-{2:2}, at: __alloc_pages_bulk+0x4ad/0x1870 mm/page_alloc.c:5290 stack backtrace: CPU: 0 PID: 2 Comm: kthreadd Tainted: G W 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:96 print_deadlock_bug kernel/locking/lockdep.c:2944 [inline] check_deadlock kernel/locking/lockdep.c:2987 [inline] validate_chain kernel/locking/lockdep.c:3776 [inline] __lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5015 lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 local_lock_acquire include/linux/local_lock_internal.h:42 [inline] rmqueue_pcplist mm/page_alloc.c:3674 [inline] rmqueue mm/page_alloc.c:3712 [inline] get_page_from_freelist+0x4aa/0x2f80 mm/page_alloc.c:4174 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5385 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:2444 [inline] __alloc_pages_bulk+0x8b9/0x1870 mm/page_alloc.c:5312 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 alloc_thread_stack_node kernel/fork.c:245 [inline] dup_task_struct kernel/fork.c:875 [inline] copy_process+0x8db/0x74d0 kernel/fork.c:1952 kernel_clone+0xe7/0xac0 kernel/fork.c:2509 kernel_thread+0xb5/0xf0 kernel/fork.c:2561 create_kthread kernel/kthread.c:342 [inline] kthreadd+0x4ea/0x750 kernel/kthread.c:685 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 --- This report is generated by a bot. 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