================================================================== BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42 Read of size 8 at addr ffffc90003f8fa60 by task syz-executor/3549 CPU: 1 PID: 3549 Comm: syz-executor Not tainted 6.1.96-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42 profile_tick+0xee/0x170 kernel/profile.c:339 tick_sched_handle kernel/time/tick-sched.c:255 [inline] tick_sched_timer+0x390/0x550 kernel/time/tick-sched.c:1501 __run_hrtimer kernel/time/hrtimer.c:1686 [inline] __hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1750 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194 Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 c2 b8 4c f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 67 06 c9 f6 65 8b 05 08 13 6d 75 85 c0 74 3f 48 c7 04 24 0e 36 RSP: 0018:ffffc90003f8fa60 EFLAGS: 00000206 RAX: f45241c4416d5c00 RBX: 1ffff920007f1f50 RCX: ffffffff91c94103 RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: 0000000000000001 RBP: ffffc90003f8faf8 R08: dffffc0000000000 R09: fffffbfff23eb924 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff920007f1f4c R14: ffffc90003f8fa80 R15: 0000000000000246 __debug_check_no_obj_freed lib/debugobjects.c:987 [inline] debug_check_no_obj_freed+0x455/0x4e0 lib/debugobjects.c:1008 slab_free_hook mm/slub.c:1699 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x205/0x3c0 mm/slub.c:3674 tomoyo_path_number_perm+0x61b/0x7f0 security/tomoyo/file.c:736 security_file_ioctl+0x6d/0xa0 security/security.c:1568 __do_sys_ioctl fs/ioctl.c:864 [inline] __se_sys_ioctl+0x47/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f257a575b1b Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00 RSP: 002b:00007fff6a458e40 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f257a575b1b RDX: 00007fff6a458ea0 RSI: 0000000000008933 RDI: 0000000000000005 RBP: 00007fff6a458ea0 R08: 000000000000000a R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000022 R13: 0000000000000028 R14: 00007f257b234620 R15: 0000000000000022 The buggy address belongs to stack of task syz-executor/3549 and is located at offset 0 in frame: _raw_spin_unlock_irqrestore+0x0/0x130 This frame has 1 object: [32, 40) 'flags.i.i.i.i' The buggy address belongs to the virtual mapping at [ffffc90003f88000, ffffc90003f91000) created by: copy_process+0x637/0x4060 kernel/fork.c:2098 The buggy address belongs to the physical page: page:ffffea00018a3a80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x628ea 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 3543, tgid 3543 (syz-executor), ts 64411931423, free_ts 18310852928 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513 prep_new_page mm/page_alloc.c:2520 [inline] get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5547 vm_area_alloc_pages mm/vmalloc.c:2992 [inline] __vmalloc_area_node mm/vmalloc.c:3068 [inline] __vmalloc_node_range+0x92b/0x1490 mm/vmalloc.c:3240 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct+0x3e5/0x6d0 kernel/fork.c:988 copy_process+0x637/0x4060 kernel/fork.c:2098 kernel_clone+0x222/0x920 kernel/fork.c:2682 __do_sys_clone kernel/fork.c:2823 [inline] __se_sys_clone kernel/fork.c:2807 [inline] __x64_sys_clone+0x231/0x280 kernel/fork.c:2807 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1440 [inline] free_pcp_prepare mm/page_alloc.c:1490 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3453 free_contig_range+0x9a/0x150 mm/page_alloc.c:9507 destroy_args+0xfe/0x997 mm/debug_vm_pgtable.c:1031 debug_vm_pgtable+0x416/0x46b mm/debug_vm_pgtable.c:1354 do_one_initcall+0x265/0x8f0 init/main.c:1298 do_initcall_level+0x157/0x207 init/main.c:1371 do_initcalls+0x49/0x86 init/main.c:1387 kernel_init_freeable+0x45c/0x60f init/main.c:1626 kernel_init+0x19/0x290 init/main.c:1514 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffffc90003f8f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003f8f980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90003f8fa00: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 ^ ffffc90003f8fa80: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003f8fb00: 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 c2 b8 4c f7 call 0xf74cb8d6 14: f6 44 24 21 02 testb $0x2,0x21(%rsp) 19: 75 4e jne 0x69 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 67 06 c9 f6 call 0xf6c90696 <-- trapping instruction 2f: 65 8b 05 08 13 6d 75 mov %gs:0x756d1308(%rip),%eax # 0x756d133e 36: 85 c0 test %eax,%eax 38: 74 3f je 0x79 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: 04 24 add $0x24,%al 3e: 0e (bad) 3f: 36 ss