================================================================== BUG: KASAN: stack-out-of-bounds in profile_pc+0xa8/0xe0 arch/x86/kernel/time.c:42 Read of size 8 at addr ffffc90003d1f100 by task syz-executor974/5065 CPU: 1 PID: 5065 Comm: syz-executor974 Not tainted 6.2.0-syzkaller-06742-g307e14c03906 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x163/0x4f0 mm/kasan/report.c:417 kasan_report+0x13a/0x170 mm/kasan/report.c:517 profile_pc+0xa8/0xe0 arch/x86/kernel/time.c:42 profile_tick+0xf2/0x170 kernel/profile.c:339 tick_sched_handle kernel/time/tick-sched.c:244 [inline] tick_sched_timer+0x394/0x550 kernel/time/tick-sched.c:1480 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x636/0x1030 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline] __sysvec_apic_timer_interrupt+0x19c/0x690 arch/x86/kernel/apic/apic.c:1113 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1107 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 ee fc 27 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 b3 53 a4 f6 65 8b 05 34 92 48 75 85 c0 74 3f 48 c7 04 24 0e 36 RSP: 0018:ffffc90003d1f100 EFLAGS: 00000206 RAX: b8416b4c84951900 RBX: 1ffff920007a3e24 RCX: ffffffff816c1c5a RDX: dffffc0000000000 RSI: ffffffff8aea7c20 RDI: 0000000000000001 RBP: ffffc90003d1f190 R08: dffffc0000000000 R09: fffffbfff205a039 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff920007a3e20 R14: ffffc90003d1f120 R15: 0000000000000246 spin_unlock_irqrestore include/linux/spinlock.h:405 [inline] rmqueue_bulk mm/page_alloc.c:3157 [inline] __rmqueue_pcplist+0x2231/0x2540 mm/page_alloc.c:3753 rmqueue_pcplist mm/page_alloc.c:3795 [inline] rmqueue mm/page_alloc.c:3838 [inline] get_page_from_freelist+0x870/0x35f0 mm/page_alloc.c:4280 __alloc_pages+0x291/0x7f0 mm/page_alloc.c:5549 __get_free_pages+0xc/0x30 mm/page_alloc.c:5599 kasan_populate_vmalloc_pte+0x2e/0xd0 mm/kasan/shadow.c:309 apply_to_pte_range mm/memory.c:2596 [inline] apply_to_pmd_range mm/memory.c:2640 [inline] apply_to_pud_range mm/memory.c:2676 [inline] apply_to_p4d_range mm/memory.c:2712 [inline] __apply_to_page_range+0x9c5/0xcc0 mm/memory.c:2746 alloc_vmap_area+0x1c2e/0x1d70 mm/vmalloc.c:1648 __get_vm_area_node+0x16c/0x360 mm/vmalloc.c:2516 __vmalloc_node_range+0x398/0x1370 mm/vmalloc.c:3188 __vmalloc_node mm/vmalloc.c:3293 [inline] vzalloc+0x79/0x90 mm/vmalloc.c:3366 profile_init+0xfe/0x170 kernel/profile.c:131 profiling_store+0x5e/0xc0 kernel/ksysfs.c:96 kernfs_fop_write_iter+0x3a6/0x4f0 fs/kernfs/file.c:334 call_write_iter include/linux/fs.h:1849 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7b2/0xbb0 fs/read_write.c:584 ksys_write+0x1a0/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f92e9c71da9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc96804288 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f92e9c71da9 RDX: 0000000000000012 RSI: 0000000020000380 RDI: 0000000000000003 RBP: 00007f92e9c35cc0 R08: 0000000000000012 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f92e9c35d50 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to stack of task syz-executor974/5065 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 [ffffc90003d18000, ffffc90003d21000) created by: copy_process+0x5bd/0x3fc0 kernel/fork.c:2103 The buggy address belongs to the physical page: page:ffffea0001d6bcc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x75af3 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 4642, tgid 4642 (dhcpcd), ts 62159591311, free_ts 19964999361 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x347a/0x35f0 mm/page_alloc.c:4283 __alloc_pages+0x291/0x7f0 mm/page_alloc.c:5549 vm_area_alloc_pages mm/vmalloc.c:2990 [inline] __vmalloc_area_node mm/vmalloc.c:3058 [inline] __vmalloc_node_range+0x966/0x1370 mm/vmalloc.c:3228 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct+0x3e5/0x750 kernel/fork.c:987 copy_process+0x5bd/0x3fc0 kernel/fork.c:2103 kernel_clone+0x22d/0x9b0 kernel/fork.c:2687 __do_sys_clone kernel/fork.c:2828 [inline] __se_sys_clone kernel/fork.c:2812 [inline] __x64_sys_clone+0x235/0x280 kernel/fork.c:2812 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare mm/page_alloc.c:1496 [inline] free_unref_page_prepare+0xf3f/0x1040 mm/page_alloc.c:3369 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3464 free_contig_range+0x9e/0x150 mm/page_alloc.c:9488 destroy_args+0x102/0x9a0 mm/debug_vm_pgtable.c:998 debug_vm_pgtable+0x40a/0x470 mm/debug_vm_pgtable.c:1318 do_one_initcall+0x2da/0xa90 init/main.c:1306 do_initcall_level+0x157/0x210 init/main.c:1379 do_initcalls+0x3f/0x80 init/main.c:1395 kernel_init_freeable+0x477/0x630 init/main.c:1634 kernel_init+0x1d/0x2a0 init/main.c:1522 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffffc90003d1f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003d1f080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90003d1f100: f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00 00 00 00 00 ^ ffffc90003d1f180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003d1f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ---------------- Code disassembly (best guess): 0: 9c pushfq 1: 8f 44 24 20 popq 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 ee fc 27 f7 callq 0xf727fd02 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 b3 53 a4 f6 callq 0xf6a453e2 <-- trapping instruction 2f: 65 8b 05 34 92 48 75 mov %gs:0x75489234(%rip),%eax # 0x7548926a 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