==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
Read of size 8 at addr ffff8881e9e4f640 by task syz.3.339/1823
CPU: 0 PID: 1823 Comm: syz.3.339 Not tainted 5.4.276-syzkaller-00020-g4275fce9fe94 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
print_address_description+0x8c/0x600 mm/kasan/report.c:384
__kasan_report+0xf3/0x120 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
profile_tick+0xb9/0x100 kernel/profile.c:416
tick_sched_handle kernel/time/tick-sched.c:206 [inline]
tick_sched_timer+0x237/0x3c0 kernel/time/tick-sched.c:1342
__run_hrtimer kernel/time/hrtimer.c:1581 [inline]
__hrtimer_run_queues+0x3e9/0xb90 kernel/time/hrtimer.c:1643
hrtimer_interrupt+0x38a/0x890 kernel/time/hrtimer.c:1705
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1122 [inline]
smp_apic_timer_interrupt+0x110/0x460 arch/x86/kernel/apic/apic.c:1147
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:76 [inline]
RIP: 0010:do_raw_spin_lock include/linux/spinlock.h:181 [inline]
RIP: 0010:__raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
RIP: 0010:_raw_spin_lock+0x82/0x1b0 kernel/locking/spinlock.c:151
Code: f1 f1 f1 f1 04 f3 f3 f3 4a 89 04 23 bf 01 00 00 00 e8 72 c9 f3 fc 4d 89 fe 49 c1 ee 03 43 0f b6 04 26 84 c0 0f 85 bb 00 00 00 44 24 20 00 00 00 00 4c 89 ef be 04 00 00 00 e8 39 dc 42 fd 4c
RSP: 0018:ffff8881e9e4f640 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000004 RBX: 1ffff1103d3c9ec8 RCX: 00000000e9e4f603
RDX: ffffc90001d4c000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881e9e4f6d0 R08: ffffffff83d0f125 R09: ffffffff820b2926
R10: ffff8881e3a5ee40 R11: 0000000000000002 R12: dffffc0000000000
R13: ffff8881ef433ac0 R14: 1ffff1103d3c9ecc R15: ffff8881e9e4f660
spin_lock include/linux/spinlock.h:338 [inline]
unix_dgram_sendmsg+0xd81/0x1ff0 net/unix/af_unix.c:1749
sock_sendmsg_nosec net/socket.c:638 [inline]
__sock_sendmsg net/socket.c:650 [inline]
____sys_sendmsg+0x5ac/0x8f0 net/socket.c:2306
___sys_sendmsg net/socket.c:2360 [inline]
__sys_sendmmsg+0x3c3/0x700 net/socket.c:2463
__do_sys_sendmmsg net/socket.c:2492 [inline]
__se_sys_sendmmsg net/socket.c:2489 [inline]
__x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2489
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fd731d91b99
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:00007fd731013048 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fd731f1ffa0 RCX: 00007fd731d91b99
RDX: 0000000000000318 RSI: 00000000200bd000 RDI: 0000000000000004
RBP: 00007fd731e1277e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fd731f1ffa0 R15: 00007ffece3c7218
The buggy address belongs to the page:
page:ffffea0007a793c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 0000000000000000 ffffea0007a793c8 0000000000000000
raw: 0000000000000000 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 0x500dc0(GFP_USER|__GFP_ZERO|__GFP_ACCOUNT)
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x18f/0x370 mm/page_alloc.c:2171
get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893
__alloc_pages include/linux/gfp.h:503 [inline]
__alloc_pages_node include/linux/gfp.h:516 [inline]
alloc_pages_node include/linux/gfp.h:530 [inline]
alloc_thread_stack_node kernel/fork.c:259 [inline]
dup_task_struct+0x85/0x600 kernel/fork.c:886
copy_process+0x56d/0x3230 kernel/fork.c:1889
_do_fork+0x197/0x900 kernel/fork.c:2399
__do_sys_clone3 kernel/fork.c:2688 [inline]
__se_sys_clone3 kernel/fork.c:2675 [inline]
__x64_sys_clone3+0x2da/0x300 kernel/fork.c:2675
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1176 [inline]
__free_pages_ok+0x847/0x950 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4955 [inline]
__free_pages+0x91/0x140 mm/page_alloc.c:4961
free_thread_stack kernel/fork.c:299 [inline]
release_task_stack kernel/fork.c:439 [inline]
put_task_stack+0x212/0x260 kernel/fork.c:450
finish_task_switch+0x24a/0x590 kernel/sched/core.c:3479
context_switch kernel/sched/core.c:3611 [inline]
__schedule+0xb0d/0x1320 kernel/sched/core.c:4307
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:4456
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:4481
___preempt_schedule+0x16/0x20 arch/x86/entry/thunk_64.S:50
try_to_wake_up+0x9d3/0x14f0 kernel/sched/core.c:2864
wake_up_process kernel/sched/core.c:2882 [inline]
wake_up_q+0x94/0xf0 kernel/sched/core.c:502
futex_wake+0x601/0x840 kernel/futex.c:1724
do_futex+0x13fe/0x19f0 kernel/futex.c:3893
__do_sys_futex kernel/futex.c:3949 [inline]
__se_sys_futex+0x355/0x470 kernel/futex.c:3917
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
addr ffff8881e9e4f640 is located in stack of task syz.3.339/1823 at offset 0 in frame:
_raw_spin_lock+0x0/0x1b0
this frame has 1 object:
[32, 36) 'val.i.i.i'
Memory state around the buggy address:
ffff8881e9e4f500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8881e9e4f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881e9e4f600: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 04 f3 f3 f3
^
ffff8881e9e4f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8881e9e4f700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: f1 int1
1: f1 int1
2: f1 int1
3: f1 int1
4: 04 f3 add $0xf3,%al
6: f3 f3 4a 89 04 23 repz xrelease mov %rax,(%rbx,%r12,1)
c: bf 01 00 00 00 mov $0x1,%edi
11: e8 72 c9 f3 fc call 0xfcf3c988
16: 4d 89 fe mov %r15,%r14
19: 49 c1 ee 03 shr $0x3,%r14
1d: 43 0f b6 04 26 movzbl (%r14,%r12,1),%eax
22: 84 c0 test %al,%al
24: 0f 85 bb 00 00 00 jne 0xe5
* 2a: c7 44 24 20 00 00 00 movl $0x0,0x20(%rsp) <-- trapping instruction
31: 00
32: 4c 89 ef mov %r13,%rdi
35: be 04 00 00 00 mov $0x4,%esi
3a: e8 39 dc 42 fd call 0xfd42dc78
3f: 4c rex.WR