================================================================== BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42 Read of size 8 at addr ffffc90004f3f5c0 by task syz.4.96/3902 CPU: 0 PID: 3902 Comm: syz.4.96 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:ffffc90004f3f5c0 EFLAGS: 00000206 RAX: 1ba2f03063e56d00 RBX: 1ffff920009e7ebc RCX: ffffffff816ad45a RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: 0000000000000001 RBP: ffffc90004f3f650 R08: dffffc0000000000 R09: fffffbfff2093859 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff920009e7eb8 R14: ffffc90004f3f5e0 R15: 0000000000000246 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] __wake_up_common_lock kernel/sched/wait.c:140 [inline] __wake_up_sync_key+0x121/0x1c0 kernel/sched/wait.c:208 __unix_dgram_recvmsg+0x5fe/0x1260 net/unix/af_unix.c:2477 ____sys_recvmsg+0x285/0x530 ___sys_recvmsg net/socket.c:2775 [inline] do_recvmmsg+0x46d/0xad0 net/socket.c:2869 __sys_recvmmsg net/socket.c:2948 [inline] __do_sys_recvmmsg net/socket.c:2971 [inline] __se_sys_recvmmsg net/socket.c:2964 [inline] __x64_sys_recvmmsg+0x195/0x240 net/socket.c:2964 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: 0033:0x7f7d5f975b99 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:00007f7d607f9048 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f7d5fb04078 RCX: 00007f7d5f975b99 RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000004 RBP: 00007f7d5f9f677e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f7d5fb04078 R15: 00007ffc611e24c8 The buggy address belongs to stack of task syz.4.96/3902 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 [ffffc90004f38000, ffffc90004f41000) created by: copy_process+0x637/0x4060 kernel/fork.c:2098 The buggy address belongs to the physical page: page:ffffea000087b640 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21ed9 memcg:ffff888015f41882 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888015f41882 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 3862, tgid 3862 (syz.3.83), ts 75803560948, free_ts 75559265611 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_clone3 kernel/fork.c:2981 [inline] __se_sys_clone3+0x373/0x410 kernel/fork.c:2965 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_list+0x663/0x900 mm/page_alloc.c:3499 release_pages+0x2836/0x2b40 mm/swap.c:1055 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:254 [inline] tlb_flush_mmu+0xfc/0x210 mm/mmu_gather.c:261 tlb_finish_mmu+0xce/0x1f0 mm/mmu_gather.c:361 exit_mmap+0x3c3/0x9f0 mm/mmap.c:3239 __mmput+0x115/0x3c0 kernel/fork.c:1199 exit_mm+0x226/0x300 kernel/exit.c:563 do_exit+0x9f6/0x26a0 kernel/exit.c:856 __do_sys_exit kernel/exit.c:986 [inline] __se_sys_exit kernel/exit.c:984 [inline] __x64_sys_exit+0x3c/0x40 kernel/exit.c:984 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 Memory state around the buggy address: ffffc90004f3f480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004f3f500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90004f3f580: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 ^ ffffc90004f3f600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004f3f680: f1 f1 f1 f1 00 00 00 00 00 f3 f3 f3 f3 f3 f3 f3 ================================================================== ---------------- 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