==================================================================
BUG: KASAN: slab-use-after-free in __rb_erase_augmented include/linux/rbtree_augmented.h:244 [inline]
BUG: KASAN: slab-use-after-free in rb_erase+0x182/0xe70 lib/rbtree.c:443
Write of size 8 at addr ffff88807d50a0c0 by task swapper/1/0
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.11.0-rc4-next-20240821-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
__rb_erase_augmented include/linux/rbtree_augmented.h:244 [inline]
rb_erase+0x182/0xe70 lib/rbtree.c:443
sched_core_dequeue kernel/sched/core.c:283 [inline]
dequeue_task+0x34d/0x550 kernel/sched/core.c:2031
detach_task kernel/sched/fair.c:9368 [inline]
detach_tasks kernel/sched/fair.c:9504 [inline]
sched_balance_rq+0x5d5b/0x8590 kernel/sched/fair.c:11648
sched_balance_domains+0x565/0xa90 kernel/sched/fair.c:12069
handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
__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
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1037
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 80 d7 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d d5 a0 ac 00 f3 0f 1e fa fb f4 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246
RAX: ffff888017ec0000 RBX: ffff888018ec5064 RCX: 0000000000099019
RDX: 0000000000000001 RSI: ffff888018ec5000 RDI: ffff888018ec5064
RBP: 000000000003a6f8 R08: ffff8880b9137c7b R09: 1ffff11017226f8f
R10: dffffc0000000000 R11: ffffffff8bbdb1e0 R12: ffff888018bc6800
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8f11c5c0
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702
cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x375/0x5d0 kernel/sched/idle.c:326
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
start_secondary+0x102/0x110 arch/x86/kernel/smpboot.c:313
common_startup_64+0x13e/0x147
Allocated by task 5842:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4036 [inline]
slab_alloc_node mm/slub.c:4085 [inline]
kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4128
alloc_task_struct_node kernel/fork.c:180 [inline]
dup_task_struct+0x57/0x8c0 kernel/fork.c:1107
copy_process+0x5d1/0x3d50 kernel/fork.c:2206
kernel_clone+0x226/0x8f0 kernel/fork.c:2787
__do_sys_clone3 kernel/fork.c:3091 [inline]
__se_sys_clone3+0x2cb/0x350 kernel/fork.c:3070
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
Freed by task 0:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2299 [inline]
slab_free mm/slub.c:4521 [inline]
kmem_cache_free+0x195/0x3d0 mm/slub.c:4623
put_task_struct include/linux/sched/task.h:139 [inline]
delayed_put_task_struct+0x125/0x300 kernel/exit.c:228
rcu_do_batch kernel/rcu/tree.c:2567 [inline]
rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2823
handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
__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
instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
sysvec_call_function_single+0xa3/0xc0 arch/x86/kernel/smp.c:266
asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709
Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541
__call_rcu_common kernel/rcu/tree.c:3086 [inline]
call_rcu+0x167/0xa70 kernel/rcu/tree.c:3190
context_switch kernel/sched/core.c:5314 [inline]
__schedule+0x1852/0x4b30 kernel/sched/core.c:6677
schedule_idle+0x53/0x90 kernel/sched/core.c:6795
do_idle+0x56a/0x5d0 kernel/sched/idle.c:354
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
rest_init+0x2dc/0x300 init/main.c:747
start_kernel+0x47f/0x500 init/main.c:1105
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147
The buggy address belongs to the object at ffff88807d509e00
which belongs to the cache task_struct of size 7424
The buggy address is located 704 bytes inside of
freed 7424-byte region [ffff88807d509e00, ffff88807d50bb00)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d508
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888025c3da81
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff8880166fb500 ffffea000072c600 dead000000000002
raw: 0000000000000000 0000000080040004 00000001fdffffff ffff888025c3da81
head: 00fff00000000040 ffff8880166fb500 ffffea000072c600 dead000000000002
head: 0000000000000000 0000000080040004 00000001fdffffff ffff888025c3da81
head: 00fff00000000003 ffffea0001f54201 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
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 4673, tgid 4673 (S02sysctl), ts 23625944582, free_ts 21430703154
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1517
prep_new_page mm/page_alloc.c:1525 [inline]
get_page_from_freelist+0x3004/0x30c0 mm/page_alloc.c:3476
__alloc_pages_noprof+0x29e/0x780 mm/page_alloc.c:4743
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x5f/0x120 mm/slub.c:2368
allocate_slab+0x5a/0x2f0 mm/slub.c:2531
new_slab mm/slub.c:2584 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3771
__slab_alloc+0x58/0xa0 mm/slub.c:3861
__slab_alloc_node mm/slub.c:3914 [inline]
slab_alloc_node mm/slub.c:4073 [inline]
kmem_cache_alloc_node_noprof+0x1fe/0x320 mm/slub.c:4128
alloc_task_struct_node kernel/fork.c:180 [inline]
dup_task_struct+0x57/0x8c0 kernel/fork.c:1107
copy_process+0x5d1/0x3d50 kernel/fork.c:2206
kernel_clone+0x226/0x8f0 kernel/fork.c:2787
__do_sys_clone kernel/fork.c:2930 [inline]
__se_sys_clone kernel/fork.c:2914 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2914
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
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1098 [inline]
free_unref_page+0xc07/0xd90 mm/page_alloc.c:2651
free_contig_range+0x152/0x550 mm/page_alloc.c:6758
destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1017
debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1397
do_one_initcall+0x248/0x880 init/main.c:1269
do_initcall_level+0x157/0x210 init/main.c:1331
do_initcalls+0x3f/0x80 init/main.c:1347
kernel_init_freeable+0x435/0x5d0 init/main.c:1580
kernel_init+0x1d/0x2b0 init/main.c:1469
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Memory state around the buggy address:
ffff88807d509f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807d50a000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807d50a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807d50a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807d50a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 65 48 8b 04 25 80 d7 mov %gs:0x3d780,%rax
10: 03 00
12: 48 f7 00 08 00 00 00 testq $0x8,(%rax)
19: 75 10 jne 0x2b
1b: 66 90 xchg %ax,%ax
1d: 0f 00 2d d5 a0 ac 00 verw 0xaca0d5(%rip) # 0xaca0f9
24: f3 0f 1e fa endbr64
28: fb sti
29: f4 hlt
* 2a: fa cli <-- trapping instruction
2b: c3 ret
2c: cc int3
2d: cc int3
2e: cc int3
2f: cc int3
30: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1)
37: 00 00
39: 90 nop
3a: 90 nop
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop