==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xd7/0x160 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc900041e6dc0 by task syz-executor295/5057
CPU: 1 PID: 5057 Comm: syz-executor295 Not tainted 6.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x167/0x540 mm/kasan/report.c:488
kasan_report+0x142/0x180 mm/kasan/report.c:601
profile_pc+0xd7/0x160 arch/x86/kernel/time.c:42
profile_tick+0xdc/0x140 kernel/profile.c:339
tick_sched_handle kernel/time/tick-sched.c:256 [inline]
tick_nohz_highres_handler+0x383/0x550 kernel/time/tick-sched.c:1519
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x54b/0xd00 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
__sysvec_apic_timer_interrupt+0x107/0x3a0 arch/x86/kernel/apic/apic.c:1082
sysvec_apic_timer_interrupt+0x92/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 3e 80 89 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 c3 90 fb f5 65 8b 05 24 03 9b 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc900041e6dc0 EFLAGS: 00000206
RAX: 1573e66f6dc4c800 RBX: 1ffff9200083cdbc RCX: ffffffff817187da
RDX: dffffc0000000000 RSI: ffffffff8baab5c0 RDI: 0000000000000001
RBP: ffffc900041e6e50 R08: ffffffff92c55427 R09: 1ffffffff258aa84
R10: dffffc0000000000 R11: fffffbfff258aa85 R12: dffffc0000000000
R13: 1ffff9200083cdb8 R14: ffffc900041e6de0 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
rmqueue_bulk mm/page_alloc.c:2154 [inline]
__rmqueue_pcplist+0x20a5/0x2560 mm/page_alloc.c:2820
rmqueue_pcplist mm/page_alloc.c:2862 [inline]
rmqueue mm/page_alloc.c:2899 [inline]
get_page_from_freelist+0x896/0x3580 mm/page_alloc.c:3308
__alloc_pages+0x255/0x680 mm/page_alloc.c:4567
alloc_pages_mpol+0x3de/0x650 mm/mempolicy.c:2133
vm_area_alloc_pages mm/vmalloc.c:3063 [inline]
__vmalloc_area_node mm/vmalloc.c:3139 [inline]
__vmalloc_node_range+0x9a3/0x14a0 mm/vmalloc.c:3320
__vmalloc_node mm/vmalloc.c:3385 [inline]
vzalloc+0x79/0x90 mm/vmalloc.c:3458
profile_init+0xee/0x130 kernel/profile.c:131
profiling_store+0x5e/0xc0 kernel/ksysfs.c:104
kernfs_fop_write_iter+0x3a4/0x500 fs/kernfs/file.c:334
call_write_iter include/linux/fs.h:2085 [inline]
iter_file_splice_write+0xbd6/0x14e0 fs/splice.c:743
do_splice_from fs/splice.c:941 [inline]
direct_splice_actor+0x11e/0x220 fs/splice.c:1164
splice_direct_to_actor+0x58d/0xc80 fs/splice.c:1108
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x28c/0x3e0 fs/splice.c:1233
do_sendfile+0x56d/0xdc0 fs/read_write.c:1295
__do_sys_sendfile64 fs/read_write.c:1362 [inline]
__se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1348
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f29513342a9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe4aa423f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007ffe4aa425c8 RCX: 00007f29513342a9
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 00007f29513a7610 R08: 0000000000000000 R09: 00007ffe4aa425c8
R10: 0000000100000001 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe4aa425b8 R14: 0000000000000001 R15: 0000000000000001
The buggy address belongs to stack of task syz-executor295/5057
and is located at offset 0 in frame:
_raw_spin_unlock_irqrestore+0x0/0x140 kernel/locking/spinlock.c:187
This frame has 1 object:
[32, 40) 'flags.i.i.i.i'
The buggy address belongs to the virtual mapping at
[ffffc900041e0000, ffffc900041e9000) created by:
copy_process+0x5d5/0x3fc0 kernel/fork.c:2327
The buggy address belongs to the physical page:
page:ffffea0001e23cc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x788f3
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
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 5048, tgid 5048 (sshd), ts 49159682331, free_ts 48989952978
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
prep_new_page mm/page_alloc.c:1540 [inline]
get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311
__alloc_pages+0x255/0x680 mm/page_alloc.c:4567
alloc_pages_mpol+0x3de/0x650 mm/mempolicy.c:2133
vm_area_alloc_pages mm/vmalloc.c:3063 [inline]
__vmalloc_area_node mm/vmalloc.c:3139 [inline]
__vmalloc_node_range+0x9a3/0x14a0 mm/vmalloc.c:3320
alloc_thread_stack_node kernel/fork.c:307 [inline]
dup_task_struct+0x3e9/0x7d0 kernel/fork.c:1112
copy_process+0x5d5/0x3fc0 kernel/fork.c:2327
kernel_clone+0x222/0x840 kernel/fork.c:2902
__do_sys_clone kernel/fork.c:3045 [inline]
__se_sys_clone kernel/fork.c:3029 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:3029
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
page last free pid 4962 tgid 4962 stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1140 [inline]
free_unref_page_prepare+0x95d/0xa80 mm/page_alloc.c:2346
free_unref_page+0x37/0x3f0 mm/page_alloc.c:2486
pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
pipe_update_tail fs/pipe.c:234 [inline]
pipe_read+0x6f5/0x13f0 fs/pipe.c:354
call_read_iter include/linux/fs.h:2079 [inline]
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x978/0xb70 fs/read_write.c:476
ksys_read+0x1a0/0x2c0 fs/read_write.c:619
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
Memory state around the buggy address:
ffffc900041e6c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900041e6d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900041e6d80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3
^
ffffc900041e6e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900041e6e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 9c pushf
1: 8f 44 24 20 pop 0x20(%rsp)
5: 42 80 3c 23 00 cmpb $0x0,(%rbx,%r12,1)
a: 74 08 je 0x14
c: 4c 89 f7 mov %r14,%rdi
f: e8 3e 80 89 f6 call 0xf6898052
14: f6 44 24 21 02 testb $0x2,0x21(%rsp)
19: 75 52 jne 0x6d
1b: 41 f7 c7 00 02 00 00 test $0x200,%r15d
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 c3 90 fb f5 call 0xf5fb90f2 <-- trapping instruction
2f: 65 8b 05 24 03 9b 74 mov %gs:0x749b0324(%rip),%eax # 0x749b035a
36: 85 c0 test %eax,%eax
38: 74 43 je 0x7d
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss