==================================================================
BUG: KASAN: slab-use-after-free in min_deadline_update kernel/sched/fair.c:818 [inline]
BUG: KASAN: slab-use-after-free in min_deadline_cb_propagate kernel/sched/fair.c:825 [inline]
BUG: KASAN: slab-use-after-free in reweight_entity+0x8c7/0xa60 kernel/sched/fair.c:3660
Read of size 8 at addr ffff88801d5480a8 by task syz-executor.2/26410
CPU: 0 PID: 26410 Comm: syz-executor.2 Not tainted 6.6.0-rc6-syzkaller-00217-gcd8892c07876 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:475
kasan_report+0xda/0x110 mm/kasan/report.c:588
min_deadline_update kernel/sched/fair.c:818 [inline]
min_deadline_cb_propagate kernel/sched/fair.c:825 [inline]
reweight_entity+0x8c7/0xa60 kernel/sched/fair.c:3660
entity_tick kernel/sched/fair.c:5317 [inline]
task_tick_fair+0xee/0xcd0 kernel/sched/fair.c:12392
scheduler_tick+0x210/0x650 kernel/sched/core.c:5657
update_process_times+0x19f/0x220 kernel/time/timer.c:2076
tick_sched_handle+0x8e/0x170 kernel/time/tick-sched.c:254
tick_sched_timer+0xe9/0x110 kernel/time/tick-sched.c:1492
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x647/0xc10 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline]
__sysvec_apic_timer_interrupt+0x105/0x3f0 arch/x86/kernel/apic/apic.c:1080
sysvec_apic_timer_interrupt+0x42/0xc0 arch/x86/kernel/apic/apic.c:1074
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__rcu_read_unlock+0x4/0x570 kernel/rcu/tree_plugin.h:419
Code: f8 ff ff 48 8b 7c 24 28 e8 99 09 6c 00 e9 5b fa ff ff 48 8b 7c 24 30 e8 ea 08 6c 00 e9 2b fa ff ff 0f 1f 44 00 00 f3 0f 1e fa <41> 56 41 55 41 54 55 65 48 8b 2c 25 c0 bc 03 00 53 48 8d bd 3c 04
RSP: 0018:ffffc90000007940 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000100
RDX: ffff888030398000 RSI: ffffffff819605dc RDI: 0000000000000001
RBP: 00007f9a99e7ca00 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc900000079f8
R13: ffffffff81758040 R14: ffffc90000007a70 R15: ffff888030398000
rcu_read_unlock include/linux/rcupdate.h:781 [inline]
is_bpf_text_address+0x81/0x1a0 kernel/bpf/core.c:731
kernel_text_address kernel/extable.c:125 [inline]
kernel_text_address+0x85/0xf0 kernel/extable.c:94
__kernel_text_address+0xd/0x30 kernel/extable.c:79
unwind_get_return_address+0x78/0xe0 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xbe/0x170 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
kmem_cache_free+0xf0/0x480 mm/slub.c:3831
rcu_do_batch kernel/rcu/tree.c:2139 [inline]
rcu_core+0x805/0x1bb0 kernel/rcu/tree.c:2403
__do_softirq+0x218/0x965 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1074
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__stack_depot_save+0x44/0x510 lib/stackdepot.c:379
Code: 30 65 48 8b 04 25 28 00 00 00 48 89 44 24 28 31 c0 48 c7 44 24 20 00 00 00 00 e8 f7 ed 1f fd 85 c0 74 09 80 3d fc c2 fc 0d 00 <74> 07 31 c0 e9 49 01 00 00 89 c2 41 89 c7 48 8d 04 12 8d 1c 85 7b
RSP: 0018:ffffc9000a117658 EFLAGS: 00000246
RAX: 0000000000000012 RBX: 0000000000000001 RCX: 0000000000000001
RDX: ffffffff8a60008b RSI: 0000000000000012 RDI: ffffc9000a117750
RBP: ffffc9000a1176c0 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffffffff1976ca1 R12: 0000000000000001
R13: 0000000000000000 R14: ffffc9000a1176c0 R15: ffffea0001d64cc0
kasan_save_stack+0x43/0x50 mm/kasan/common.c:46
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
kmem_cache_free+0xf0/0x480 mm/slub.c:3831
remove_vma+0x128/0x170 mm/mmap.c:146
exit_mmap+0x453/0xa60 mm/mmap.c:3234
__mmput+0x12a/0x4d0 kernel/fork.c:1349
mmput+0x62/0x70 kernel/fork.c:1371
exit_mm kernel/exit.c:567 [inline]
do_exit+0x9ad/0x2a20 kernel/exit.c:861
do_group_exit+0xd4/0x2a0 kernel/exit.c:1024
get_signal+0x23ba/0x2790 kernel/signal.c:2892
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9a99e7cae9
Code: Unable to access opcode bytes at 0x7f9a99e7cabf.
RSP: 002b:00007f9a9ac7d178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007f9a99f9c058 RCX: 00007f9a99e7cae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9a99f9c058
RBP: 00007f9a99f9c050 R08: 00007f9a9ac7d6c0 R09: 00007f9a9ac7d6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9a99f9c05c
R13: 000000000000006e R14: 00007fffd36fc210 R15: 00007fffd36fc2f8
Allocated by task 8623:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook mm/slab.h:762 [inline]
slab_alloc_node mm/slub.c:3478 [inline]
kmem_cache_alloc_node+0x180/0x3f0 mm/slub.c:3523
alloc_task_struct_node kernel/fork.c:173 [inline]
dup_task_struct kernel/fork.c:1110 [inline]
copy_process+0x41c/0x73f0 kernel/fork.c:2327
kernel_clone+0xfd/0x920 kernel/fork.c:2909
user_mode_thread+0xb4/0xf0 kernel/fork.c:2987
call_usermodehelper_exec_sync kernel/umh.c:133 [inline]
call_usermodehelper_exec_work+0x6b/0x170 kernel/umh.c:164
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Freed by task 22:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
kmem_cache_free+0xf0/0x480 mm/slub.c:3831
put_task_struct include/linux/sched/task.h:136 [inline]
put_task_struct include/linux/sched/task.h:123 [inline]
delayed_put_task_struct+0x21b/0x2b0 kernel/exit.c:226
rcu_do_batch kernel/rcu/tree.c:2139 [inline]
rcu_core+0x805/0x1bb0 kernel/rcu/tree.c:2403
__do_softirq+0x218/0x965 kernel/softirq.c:553
Last potentially related work creation:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492
__call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:2653
put_task_struct_rcu_user kernel/exit.c:232 [inline]
put_task_struct_rcu_user+0x87/0xc0 kernel/exit.c:229
context_switch kernel/sched/core.c:5385 [inline]
__schedule+0xee9/0x5a10 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
do_nanosleep+0x218/0x500 kernel/time/hrtimer.c:2047
hrtimer_nanosleep+0x1ae/0x440 kernel/time/hrtimer.c:2100
common_nsleep+0xa1/0xc0 kernel/time/posix-timers.c:1350
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline]
__se_sys_clock_nanosleep kernel/time/posix-timers.c:1373 [inline]
__x64_sys_clock_nanosleep+0x344/0x490 kernel/time/posix-timers.c:1373
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Second to last potentially related work creation:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492
task_work_add+0x88/0x2a0 kernel/task_work.c:48
scheduler_tick+0x228/0x650 kernel/sched/core.c:5662
update_process_times+0x19f/0x220 kernel/time/timer.c:2076
tick_sched_handle+0x8e/0x170 kernel/time/tick-sched.c:254
tick_sched_timer+0xe9/0x110 kernel/time/tick-sched.c:1492
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x647/0xc10 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline]
__sysvec_apic_timer_interrupt+0x105/0x3f0 arch/x86/kernel/apic/apic.c:1080
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1074
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
The buggy address belongs to the object at ffff88801d548000
which belongs to the cache task_struct of size 7360
The buggy address is located 168 bytes inside of
freed 7360-byte region [ffff88801d548000, ffff88801d549cc0)
The buggy address belongs to the physical page:
page:ffffea0000755200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d548
head:ffffea0000755200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88802e41e841
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888014e43500 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff88802e41e841
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 134, tgid 134 (kworker/u4:6), ts 13444656874, free_ts 0
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
prep_new_page mm/page_alloc.c:1543 [inline]
get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170
__alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426
alloc_pages+0x1a9/0x270 mm/mempolicy.c:2297
alloc_slab_page mm/slub.c:1870 [inline]
allocate_slab+0x251/0x380 mm/slub.c:2017
new_slab mm/slub.c:2070 [inline]
___slab_alloc+0x8c7/0x1580 mm/slub.c:3223
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
__slab_alloc_node mm/slub.c:3375 [inline]
slab_alloc_node mm/slub.c:3468 [inline]
kmem_cache_alloc_node+0x132/0x3f0 mm/slub.c:3523
alloc_task_struct_node kernel/fork.c:173 [inline]
dup_task_struct kernel/fork.c:1110 [inline]
copy_process+0x41c/0x73f0 kernel/fork.c:2327
kernel_clone+0xfd/0x920 kernel/fork.c:2909
user_mode_thread+0xb4/0xf0 kernel/fork.c:2987
call_usermodehelper_exec_work kernel/umh.c:172 [inline]
call_usermodehelper_exec_work+0xcb/0x170 kernel/umh.c:158
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
page_owner free stack trace missing
Memory state around the buggy address:
ffff88801d547f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88801d548000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801d548080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801d548100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801d548180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 3 bytes skipped:
0: 48 8b 7c 24 28 mov 0x28(%rsp),%rdi
5: e8 99 09 6c 00 call 0x6c09a3
a: e9 5b fa ff ff jmp 0xfffffa6a
f: 48 8b 7c 24 30 mov 0x30(%rsp),%rdi
14: e8 ea 08 6c 00 call 0x6c0903
19: e9 2b fa ff ff jmp 0xfffffa49
1e: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
23: f3 0f 1e fa endbr64
* 27: 41 56 push %r14 <-- trapping instruction
29: 41 55 push %r13
2b: 41 54 push %r12
2d: 55 push %rbp
2e: 65 48 8b 2c 25 c0 bc mov %gs:0x3bcc0,%rbp
35: 03 00
37: 53 push %rbx
38: 48 rex.W
39: 8d .byte 0x8d
3a: bd .byte 0xbd
3b: 3c 04 cmp $0x4,%al