syzbot

=============================
[ BUG: Invalid wait context ]
6.12.0-rc5-next-20241031-syzkaller #0 Not tainted
-----------------------------
syz.0.49/6178 is trying to lock:
ffff88813fffc298 (&zone->lock){-.-.}-{3:3}, at: rmqueue_bulk mm/page_alloc.c:2328 [inline]
ffff88813fffc298 (&zone->lock){-.-.}-{3:3}, at: __rmqueue_pcplist+0x4c6/0x2b70 mm/page_alloc.c:3022
other info that might help us debug this:
context-{2:2}
4 locks held by syz.0.49/6178:
 #0: ffff888031745be0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:189 [inline]
 #0: ffff888031745be0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x165/0xcb0 mm/mmap.c:1677
 #1: ffffffff8e939f20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #1: ffffffff8e939f20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffffff8e939f20 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x82/0x380 mm/pgtable-generic.c:287
 #2: ffff88803007c978 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #2: ffff88803007c978 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: __pte_offset_map_lock+0x1ba/0x300 mm/pgtable-generic.c:402
 #3: ffff8880b8744618 (&pcp->lock){+.+.}-{3:3}, at: spin_trylock include/linux/spinlock.h:361 [inline]
 #3: ffff8880b8744618 (&pcp->lock){+.+.}-{3:3}, at: rmqueue_pcplist mm/page_alloc.c:3051 [inline]
 #3: ffff8880b8744618 (&pcp->lock){+.+.}-{3:3}, at: rmqueue mm/page_alloc.c:3095 [inline]
 #3: ffff8880b8744618 (&pcp->lock){+.+.}-{3:3}, at: get_page_from_freelist+0x7e2/0x3870 mm/page_alloc.c:3492
stack backtrace:
CPU: 1 UID: 0 PID: 6178 Comm: syz.0.49 Not tainted 6.12.0-rc5-next-20241031-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4826 [inline]
 check_wait_context kernel/locking/lockdep.c:4898 [inline]
 __lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5176
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 rmqueue_bulk mm/page_alloc.c:2328 [inline]
 __rmqueue_pcplist+0x4c6/0x2b70 mm/page_alloc.c:3022
 rmqueue_pcplist mm/page_alloc.c:3064 [inline]
 rmqueue mm/page_alloc.c:3095 [inline]
 get_page_from_freelist+0x895/0x3870 mm/page_alloc.c:3492
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4771
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
 stack_depot_save_flags+0x666/0x830 lib/stackdepot.c:627
 save_stack+0x109/0x1f0 mm/page_owner.c:157
 __set_page_owner+0x92/0x800 mm/page_owner.c:320
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1541
 prep_new_page mm/page_alloc.c:1549 [inline]
 get_page_from_freelist+0x3725/0x3870 mm/page_alloc.c:3495
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4771
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
 stack_depot_save_flags+0x666/0x830 lib/stackdepot.c:627
 kasan_save_stack+0x4f/0x60 mm/kasan/common.c:48
 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544
 task_work_add+0xd9/0x490 kernel/task_work.c:77
 __run_posix_cpu_timers kernel/time/posix-cpu-timers.c:1219 [inline]
 run_posix_cpu_timers+0x6ac/0x810 kernel/time/posix-cpu-timers.c:1418
 tick_sched_handle kernel/time/tick-sched.c:276 [inline]
 tick_nohz_handler+0x37c/0x500 kernel/time/tick-sched.c:297
 __run_hrtimer kernel/time/hrtimer.c:1691 [inline]
 __hrtimer_run_queues+0x551/0xd50 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:321 [inline]
RIP: 0010:handle_softirqs+0x1e3/0x980 kernel/softirq.c:542
Code: 7c 24 70 45 0f b7 e4 48 c7 c7 20 c5 09 8c e8 c4 6c 6c 0a 65 66 c7 05 32 53 ac 7e 00 00 e8 05 67 45 00 fb 49 c7 c6 c0 a0 60 8e <b8> ff ff ff ff 41 0f bc c4 41 89 c7 41 ff c7 0f 84 eb 03 00 00 44
RSP: 0018:ffffc90000a18e40 EFLAGS: 00000286
RAX: 959a1636e72c7c00 RBX: ffffc90000a18ee0 RCX: ffffffff8170c69a
RDX: dffffc0000000000 RSI: ffffffff8c0ad3a0 RDI: ffffffff8c604dc0
RBP: ffffc90000a18f50 R08: ffffffff942cd847 R09: 1ffffffff2859b08
R10: dffffc0000000000 R11: fffffbfff2859b09 R12: 0000000000000010
R13: 0000000000000000 R14: ffffffff8e60a0c0 R15: 1ffff11003cec000
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 common_interrupt+0xb9/0xd0 arch/x86/kernel/irq.c:278
 </IRQ>
 <TASK>
 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:zap_pmd_range mm/memory.c:1753 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1782 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1803 [inline]
RIP: 0010:unmap_page_range+0x1ffd/0x4230 mm/memory.c:1824
Code: 02 00 00 4c 8d bc 24 c0 02 00 00 48 8b 44 24 48 48 98 48 89 c1 48 c1 e1 0c 49 01 cd 4c 3b ac 24 98 00 00 00 0f 84 44 14 00 00 <4c> 89 6c 24 28 48 8b 5c 24 38 48 8d 1c c3 e8 50 01 b2 ff e9 ec e9
RSP: 0018:ffffc9000303f560 EFLAGS: 00000287
RAX: 0000000000000001 RBX: ffff88803023b5c8 RCX: 0000000000001000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000303f890 R08: ffffffff81e30b9c R09: 1ffffd4000333df6
R10: dffffc0000000000 R11: fffff94000333df7 R12: dffffc0000000000
R13: 00000000200ba000 R14: ffffc9000303f7e0 R15: ffffc9000303f820
 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1914
 exit_mmap+0x292/0xcb0 mm/mmap.c:1693
 __mmput+0x115/0x390 kernel/fork.c:1344
 exit_mm+0x220/0x310 kernel/exit.c:570
 do_exit+0x9b2/0x28e0 kernel/exit.c:925
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 __do_sys_exit_group kernel/exit.c:1098 [inline]
 __se_sys_exit_group kernel/exit.c:1096 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faae5f7e719
Code: Unable to access opcode bytes at 0x7faae5f7e6ef.
RSP: 002b:00007ffc97dbc998 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faae5f7e719
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc97dbc9ec R08: 00007ffc97dbca7f R09: 0000000000013547
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000032
R13: 0000000000013547 R14: 0000000000013547 R15: 00007ffc97dbca40
 </TASK>
----------------
Code disassembly (best guess):
   0:	7c 24                	jl     0x26
   2:	70 45                	jo     0x49
   4:	0f b7 e4             	movzwl %sp,%esp
   7:	48 c7 c7 20 c5 09 8c 	mov    $0xffffffff8c09c520,%rdi
   e:	e8 c4 6c 6c 0a       	call   0xa6c6cd7
  13:	65 66 c7 05 32 53 ac 	movw   $0x0,%gs:0x7eac5332(%rip)        # 0x7eac534f
  1a:	7e 00 00
  1d:	e8 05 67 45 00       	call   0x456727
  22:	fb                   	sti
  23:	49 c7 c6 c0 a0 60 8e 	mov    $0xffffffff8e60a0c0,%r14
* 2a:	b8 ff ff ff ff       	mov    $0xffffffff,%eax <-- trapping instruction
  2f:	41 0f bc c4          	bsf    %r12d,%eax
  33:	41 89 c7             	mov    %eax,%r15d
  36:	41 ff c7             	inc    %r15d
  39:	0f 84 eb 03 00 00    	je     0x42a
  3f:	44                   	rex.R