================================================================== BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42 Read of size 8 at addr ffffc90003a8f2a0 by task syz-executor163/3507 CPU: 0 PID: 3507 Comm: syz-executor163 Not tainted 6.1.49-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 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:1685 [inline] __hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 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:649 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 b2 a3 51 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 e7 13 cf f6 65 8b 05 a8 7e 73 75 85 c0 74 3f 48 c7 04 24 0e 36 RSP: 0018:ffffc90003a8f2a0 EFLAGS: 00000206 RAX: 3f125dcb6743d400 RBX: 1ffff92000751e58 RCX: ffffffff816a5a2a RDX: dffffc0000000000 RSI: ffffffff8aebe2a0 RDI: 0000000000000001 RBP: ffffc90003a8f330 R08: dffffc0000000000 R09: fffffbfff209345e R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff92000751e54 R14: ffffc90003a8f2c0 R15: 0000000000000246 spin_unlock_irqrestore include/linux/spinlock.h:405 [inline] rmqueue_pcplist mm/page_alloc.c:3805 [inline] rmqueue mm/page_alloc.c:3847 [inline] get_page_from_freelist+0x8db/0x3480 mm/page_alloc.c:4289 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5559 __get_free_pages+0x8/0x30 mm/page_alloc.c:5609 kasan_populate_vmalloc_pte+0x35/0xf0 mm/kasan/shadow.c:271 apply_to_pte_range mm/memory.c:2635 [inline] apply_to_pmd_range mm/memory.c:2679 [inline] apply_to_pud_range mm/memory.c:2715 [inline] apply_to_p4d_range mm/memory.c:2751 [inline] __apply_to_page_range+0x9c5/0xcc0 mm/memory.c:2785 alloc_vmap_area+0x1977/0x1ac0 mm/vmalloc.c:1646 __get_vm_area_node+0x16c/0x360 mm/vmalloc.c:2505 __vmalloc_node_range+0x394/0x1460 mm/vmalloc.c:3179 __vmalloc_node mm/vmalloc.c:3284 [inline] vzalloc+0x75/0x80 mm/vmalloc.c:3357 profile_init+0xfa/0x160 kernel/profile.c:131 profiling_store+0x5a/0xc0 kernel/ksysfs.c:79 kernfs_fop_write_iter+0x3a2/0x4f0 fs/kernfs/file.c:330 call_write_iter include/linux/fs.h:2205 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7ae/0xba0 fs/read_write.c:584 ksys_write+0x19c/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb1259e32e9 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:00007ffd800052b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffd80005488 RCX: 00007fb1259e32e9 RDX: 000000000000000f RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00007fb125a56610 R08: 0000000000000000 R09: 00007ffd80005488 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffd80005478 R14: 0000000000000001 R15: 0000000000000001 The buggy address belongs to stack of task syz-executor163/3507 and is located at offset 0 in frame: _raw_spin_unlock_irqrestore+0x0/0x130 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 [ffffc90003a88000, ffffc90003a91000) created by: copy_process+0x637/0x4020 kernel/fork.c:2090 The buggy address belongs to the physical page: page:ffffea00009cc940 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x27325 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 3505, tgid 3505 (sshd), ts 50528125770, free_ts 44804448013 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2533 prep_new_page mm/page_alloc.c:2540 [inline] get_page_from_freelist+0x32ed/0x3480 mm/page_alloc.c:4292 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5559 vm_area_alloc_pages mm/vmalloc.c:2979 [inline] __vmalloc_area_node mm/vmalloc.c:3047 [inline] __vmalloc_node_range+0x96c/0x1460 mm/vmalloc.c:3219 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct+0x3e5/0x6d0 kernel/fork.c:980 copy_process+0x637/0x4020 kernel/fork.c:2090 kernel_clone+0x222/0x920 kernel/fork.c:2674 __do_sys_clone kernel/fork.c:2815 [inline] __se_sys_clone kernel/fork.c:2799 [inline] __x64_sys_clone+0x231/0x280 kernel/fork.c:2799 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 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:1460 [inline] free_pcp_prepare mm/page_alloc.c:1510 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3388 free_unref_page+0x98/0x570 mm/page_alloc.c:3484 pipe_buf_release include/linux/pipe_fs_i.h:183 [inline] pipe_read+0x6e1/0x12a0 fs/pipe.c:324 call_read_iter include/linux/fs.h:2199 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7de/0xbe0 fs/read_write.c:470 ksys_read+0x19c/0x2c0 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffffc90003a8f180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003a8f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90003a8f280: 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00 ^ ffffc90003a8f300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003a8f380: 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 b2 a3 51 f7 call 0xf751a3c6 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 e7 13 cf f6 call 0xf6cf1416 <-- trapping instruction 2f: 65 8b 05 a8 7e 73 75 mov %gs:0x75737ea8(%rip),%eax # 0x75737ede 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