==================================================================
BUG: KASAN: use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
BUG: KASAN: use-after-free in do_raw_spin_lock+0x261/0x2a0 kernel/locking/spinlock_debug.c:114
Read of size 4 at addr ffff88807ef1c3f4 by task swapper/0/0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15e/0x45d mm/kasan/report.c:395
kasan_report+0xbb/0x1f0 mm/kasan/report.c:495
debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
do_raw_spin_lock+0x261/0x2a0 kernel/locking/spinlock_debug.c:114
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
_raw_spin_lock_irqsave+0x41/0x50 kernel/locking/spinlock.c:162
try_to_wake_up+0xb2/0x20f0 kernel/sched/core.c:4076
call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers.part.0+0x6a2/0xaf0 kernel/time/timer.c:1790
__run_timers kernel/time/timer.c:1768 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
__do_softirq+0x1f7/0xad8 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1107
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:113 [inline]
RIP: 0010:acpi_idle_do_entry+0x1fd/0x2a0 drivers/acpi/processor_idle.c:572
Code: 89 de e8 06 f9 ea f7 84 db 75 ac e8 6d fc ea f7 e8 28 73 f1 f7 eb 0c e8 61 fc ea f7 0f 00 2d da fd c2 00 e8 55 fc ea f7 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 30 f9 ea f7 48 85 db
RSP: 0018:ffffffff8bc07d28 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffffff8bcbc9c0 RSI: ffffffff8991a02b RDI: ffffffff8991a018
RBP: ffff888145af9864 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: ffff888145af9800 R14: ffff888145af9864 R15: ffff888146bd2004
acpi_idle_enter+0x364/0x500 drivers/acpi/processor_idle.c:709
cpuidle_enter_state+0x1ab/0xd30 drivers/cpuidle/cpuidle.c:239
cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:356
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3f7/0x590 kernel/sched/idle.c:303
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
rest_init+0x169/0x270 init/main.c:729
arch_call_rest_init+0xf/0x14 init/main.c:890
start_kernel+0x478/0x499 init/main.c:1145
secondary_startup_64_no_verify+0xce/0xdb
Allocated by task 2:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
kasan_set_track+0x21/0x30 mm/kasan/common.c:52
__kasan_slab_alloc+0x7e/0x80 mm/kasan/common.c:325
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:737 [inline]
slab_alloc_node mm/slub.c:3398 [inline]
kmem_cache_alloc_node+0x2fc/0x400 mm/slub.c:3443
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct kernel/fork.c:966 [inline]
copy_process+0x5c2/0x7190 kernel/fork.c:2084
kernel_clone+0xe7/0x980 kernel/fork.c:2671
kernel_thread+0xb5/0xf0 kernel/fork.c:2731
create_kthread kernel/kthread.c:399 [inline]
kthreadd+0x4ea/0x750 kernel/kthread.c:746
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Freed by task 15:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
kasan_set_track+0x21/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2a/0x40 mm/kasan/generic.c:511
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1750
slab_free mm/slub.c:3661 [inline]
kmem_cache_free+0xea/0x5b0 mm/slub.c:3683
put_task_struct include/linux/sched/task.h:119 [inline]
delayed_put_task_struct+0x26a/0x3d0 kernel/exit.c:178
rcu_do_batch kernel/rcu/tree.c:2250 [inline]
rcu_core+0x81f/0x1980 kernel/rcu/tree.c:2510
__do_softirq+0x1f7/0xad8 kernel/softirq.c:571
Last potentially related work creation:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:481
call_rcu+0x99/0x820 kernel/rcu/tree.c:2798
put_task_struct_rcu_user+0x7f/0xc0 kernel/exit.c:184
context_switch kernel/sched/core.c:5194 [inline]
__schedule+0xaf1/0x53f0 kernel/sched/core.c:6503
schedule+0xda/0x1b0 kernel/sched/core.c:6579
worker_thread+0x15c/0x1080 kernel/workqueue.c:2457
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Second to last potentially related work creation:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:481
call_rcu+0x99/0x820 kernel/rcu/tree.c:2798
put_task_struct_rcu_user+0x7f/0xc0 kernel/exit.c:184
release_task+0xccd/0x17e0 kernel/exit.c:234
wait_task_zombie kernel/exit.c:1136 [inline]
wait_consider_task+0x2fda/0x3bf0 kernel/exit.c:1363
do_wait_thread kernel/exit.c:1426 [inline]
do_wait+0x7c5/0xd70 kernel/exit.c:1543
kernel_wait4+0x14c/0x260 kernel/exit.c:1706
__do_sys_wait4+0x13f/0x150 kernel/exit.c:1734
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+0x63/0xcd
The buggy address belongs to the object at ffff88807ef1ba80
which belongs to the cache task_struct of size 7232
The buggy address is located 2420 bytes inside of
7232-byte region [ffff88807ef1ba80, ffff88807ef1d6c0)
The buggy address belongs to the physical page:
page:ffffea0001fbc600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ef18
head:ffffea0001fbc600 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff888025c0ac01
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000001 ffff8880119d53c0
raw: 0000000000000000 0000000080040004 00000001ffffffff ffff888025c0ac01
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2, tgid 2 (kthreadd), ts 10182605124, free_ts 10079280058
prep_new_page mm/page_alloc.c:2538 [inline]
get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4287
__alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5554
alloc_pages+0x1a6/0x270 mm/mempolicy.c:2285
alloc_slab_page mm/slub.c:1794 [inline]
allocate_slab+0x213/0x300 mm/slub.c:1939
new_slab mm/slub.c:1992 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3180
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3279
slab_alloc_node mm/slub.c:3364 [inline]
kmem_cache_alloc_node+0x189/0x400 mm/slub.c:3443
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct kernel/fork.c:966 [inline]
copy_process+0x5c2/0x7190 kernel/fork.c:2084
kernel_clone+0xe7/0x980 kernel/fork.c:2671
kernel_thread+0xb5/0xf0 kernel/fork.c:2731
create_kthread kernel/kthread.c:399 [inline]
kthreadd+0x4ea/0x750 kernel/kthread.c:746
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1458 [inline]
free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1508
free_unref_page_prepare mm/page_alloc.c:3386 [inline]
free_unref_page+0x19/0x4d0 mm/page_alloc.c:3482
free_contig_range+0xb1/0x180 mm/page_alloc.c:9492
destroy_args+0xa8/0x64c mm/debug_vm_pgtable.c:1031
debug_vm_pgtable+0x2954/0x29e5 mm/debug_vm_pgtable.c:1354
do_one_initcall+0x13d/0x780 init/main.c:1303
do_initcall_level init/main.c:1376 [inline]
do_initcalls init/main.c:1392 [inline]
do_basic_setup init/main.c:1411 [inline]
kernel_init_freeable+0x6ff/0x788 init/main.c:1631
kernel_init+0x1a/0x1d0 init/main.c:1519
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Memory state around the buggy address:
ffff88807ef1c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ef1c300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807ef1c380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807ef1c400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ef1c480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 89 de mov %ebx,%esi
2: e8 06 f9 ea f7 callq 0xf7eaf90d
7: 84 db test %bl,%bl
9: 75 ac jne 0xffffffb7
b: e8 6d fc ea f7 callq 0xf7eafc7d
10: e8 28 73 f1 f7 callq 0xf7f1733d
15: eb 0c jmp 0x23
17: e8 61 fc ea f7 callq 0xf7eafc7d
1c: 0f 00 2d da fd c2 00 verw 0xc2fdda(%rip) # 0xc2fdfd
23: e8 55 fc ea f7 callq 0xf7eafc7d
28: fb sti
29: f4 hlt
* 2a: 9c pushfq <-- trapping instruction
2b: 5b pop %rbx
2c: 81 e3 00 02 00 00 and $0x200,%ebx
32: fa cli
33: 31 ff xor %edi,%edi
35: 48 89 de mov %rbx,%rsi
38: e8 30 f9 ea f7 callq 0xf7eaf96d
3d: 48 85 db test %rbx,%rbx