RDX: 0000000000000001 RSI: ffffffff8c0ae240 RDI: ffffffff8c607c40
RBP: ffffc900001076b8 R08: ffffffff94f24f5f R09: 1ffffffff29e49eb
==================================================================
BUG: KASAN: stack-out-of-bounds in __show_regs+0x1f3/0x610 arch/x86/kernel/process_64.c:89
Read of size 8 at addr ffffc90000107558 by task syz.1.358/6751
CPU: 0 UID: 0 PID: 6751 Comm: syz.1.358 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+0x1f3/0x610 arch/x86/kernel/process_64.c:89
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:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5826
Code: 2b 00 74 08 4c 89 f7 e8 4a 9f 8b 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9000305f9a0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200060bf40 RCX: 718ee227a18d4000
RDX: dffffc0000000000 RSI: ffffffff8c0ae6e0 RDI: ffffffff8c607c40
RBP: ffffc9000305fae8 R08: ffffffff9373790f R09: 1ffffffff26e6f21
R10: dffffc0000000000 R11: fffffbfff26e6f22 R12: 1ffff9200060bf3c
R13: dffffc0000000000 R14: ffffc9000305fa00 R15: 0000000000000246
__mutex_lock_common kernel/locking/mutex.c:608 [inline]
__mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752
io_cqring_do_overflow_flush io_uring/io_uring.c:644 [inline]
io_cqring_wait io_uring/io_uring.c:2486 [inline]
__do_sys_io_uring_enter io_uring/io_uring.c:3255 [inline]
__se_sys_io_uring_enter+0x1c2a/0x2670 io_uring/io_uring.c:3147
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: 0033:0x7fa77e1779f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa77ee92048 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007fa77e305f80 RCX: 00007fa77e1779f9
RDX: 0000000000400000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fa77e1e58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa77e305f80 R15: 00007ffe7b364188
The buggy address belongs to the virtual mapping at
[ffffc90000100000, ffffc90000109000) 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:0x17a9d
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 2, tgid 2 (kthreadd), ts 2465825229, 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
kernel_thread+0x1bc/0x240 kernel/fork.c:2850
create_kthread kernel/kthread.c:412 [inline]
kthreadd+0x60d/0x810 kernel/kthread.c:765
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:
ffffc90000107400: f2 f2 00 00 00 00 00 00 f2 f2 f2 f2 00 00 00 00
ffffc90000107480: 00 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00
>ffffc90000107500: 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 00 f3 f3 f3
^
ffffc90000107580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90000107600: f1 f1 f1 f1 00 f2 f2 f2 00 f3 f3 f3 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 2b 00 sub (%rax),%eax
2: 74 08 je 0xc
4: 4c 89 f7 mov %r14,%rdi
7: e8 4a 9f 8b 00 call 0x8b9f56
c: f6 44 24 61 02 testb $0x2,0x61(%rsp)
11: 0f 85 85 01 00 00 jne 0x19c
17: 41 f7 c7 00 02 00 00 test $0x200,%r15d
1e: 74 01 je 0x21
20: fb sti
21: 48 c7 44 24 40 0e 36 movq $0x45e0360e,0x40(%rsp)
28: e0 45
* 2a: 4b c7 44 25 00 00 00 movq $0x0,0x0(%r13,%r12,1) <-- trapping instruction
31: 00 00
33: 43 c7 44 25 09 00 00 movl $0x0,0x9(%r13,%r12,1)
3a: 00 00
3c: 43 rex.XB
3d: c7 .byte 0xc7
3e: 44 rex.R
3f: 25 .byte 0x25