RIP: 0010:synchronize_rcu+0x0/0x360 kernel/rcu/tree.c:4010
Code: Unable to access opcode bytes at 0x1ffff9200099be9a.
RSP: f620:0000000000000a02 EFLAGS: 1ffff9200099bec0
==================================================================
BUG: KASAN: stack-out-of-bounds in __show_regs+0xa6/0x610 arch/x86/kernel/process_64.c:83
Read of size 8 at addr ffffc90004cdf578 by task syz-executor/11835
CPU: 0 UID: 0 PID: 11835 Comm: syz-executor Not tainted 6.11.0-rc1-next-20240729-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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
__show_regs+0xa6/0x610 arch/x86/kernel/process_64.c:83
show_trace_log_lvl+0x3d4/0x520 arch/x86/kernel/dumpstack.c:301
sched_show_task+0x506/0x6d0 kernel/sched/core.c:7512
report_rtnl_holders+0x327/0x400 net/core/rtnetlink.c:110
call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792
expire_timers kernel/time/timer.c:1843 [inline]
__run_timers kernel/time/timer.c:2417 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428
run_timer_base kernel/time/timer.c:2437 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447
handle_softirqs+0x2c4/0x970 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:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 8a 24 ac f5 48 89 df e8 02 68 ad f5 e8 4d cb d7 f5 fb bf 01 00 00 00 62 2f 9f f5 65 8b 05 a3 25 40 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc9000494f9d0 EFLAGS: 00000286
RAX: eb7433ad0ae65300 RBX: ffffffff8e60a140 RCX: ffffffff817022ea
RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff9373780f R09: 1ffffffff26e6f01
R10: dffffc0000000000 R11: fffffbfff26e6f02 R12: 00000000000000ce
R13: dffffc0000000000 R14: ffff88805d87ccc0 R15: 0000000000000001
spin_unlock_irq include/linux/spinlock.h:401 [inline]
alloc_pid+0x33f/0xcb0 kernel/pid.c:243
copy_process+0x1ce2/0x3d90 kernel/fork.c:2392
kernel_clone+0x226/0x8f0 kernel/fork.c:2788
__do_sys_clone kernel/fork.c:2931 [inline]
__se_sys_clone kernel/fork.c:2915 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2915
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: 0033:0x7f751296dc13
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffcda3848e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f751296dc13
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055559049d7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000b19f2 R14: 00000000000b0fde R15: 00007ffcda384a70
The buggy address belongs to the virtual mapping at
[ffffc90004cd8000, ffffc90004ce1000) created by:
copy_process+0x5d1/0x3d90 kernel/fork.c:2206
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x252a7
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 12, tgid 12 (kworker/u8:1), ts 9663360072, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
prep_new_page mm/page_alloc.c:1501 [inline]
get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3442
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4700
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2263
vm_area_alloc_pages mm/vmalloc.c:3584 [inline]
__vmalloc_area_node mm/vmalloc.c:3660 [inline]
__vmalloc_node_range_noprof+0x971/0x1460 mm/vmalloc.c:3841
alloc_thread_stack_node kernel/fork.c:314 [inline]
dup_task_struct+0x444/0x8c0 kernel/fork.c:1115
copy_process+0x5d1/0x3d90 kernel/fork.c:2206
kernel_clone+0x226/0x8f0 kernel/fork.c:2788
user_mode_thread+0x132/0x1a0 kernel/fork.c:2866
call_usermodehelper_exec_work+0x5c/0x230 kernel/umh.c:172
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
page_owner free stack trace missing
Memory state around the buggy address:
ffffc90004cdf400: f2 f2 00 00 00 00 00 00 f2 f2 f2 f2 00 00 00 00
ffffc90004cdf480: 00 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00
>ffffc90004cdf500: 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 00 f3 f3 f3
^
ffffc90004cdf580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90004cdf600: f1 f1 f1 f1 00 f2 f2 f2 00 f3 f3 f3 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 90 nop
1: f3 0f 1e fa endbr64
5: 53 push %rbx
6: 48 89 fb mov %rdi,%rbx
9: 48 83 c7 18 add $0x18,%rdi
d: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
12: e8 8a 24 ac f5 call 0xf5ac24a1
17: 48 89 df mov %rbx,%rdi
1a: e8 02 68 ad f5 call 0xf5ad6821
1f: e8 4d cb d7 f5 call 0xf5d7cb71
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 62 2f 9f f5 call 0xf59f2f91 <-- trapping instruction
2f: 65 8b 05 a3 25 40 74 mov %gs:0x744025a3(%rip),%eax # 0x744025d9
36: 85 c0 test %eax,%eax
38: 74 06 je 0x40
3a: 5b pop %rbx
3b: c3 ret
3c: cc int3
3d: cc int3
3e: cc int3
3f: cc int3