================================================================== BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42 Read of size 8 at addr ffffc90004f3f8a0 by task syz-executor236/19553 CPU: 0 PID: 19553 Comm: syz-executor236 Not tainted 5.15.160-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42 profile_tick+0xd4/0x130 kernel/profile.c:416 tick_sched_handle kernel/time/tick-sched.c:255 [inline] tick_sched_timer+0x390/0x550 kernel/time/tick-sched.c:1473 __run_hrtimer kernel/time/hrtimer.c:1686 [inline] __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1750 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [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 f2 bd a2 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 f7 f4 2f f7 65 8b 05 c8 02 db 75 85 c0 74 3f 48 c7 04 24 0e 36 RSP: 0018:ffffc90004f3f8a0 EFLAGS: 00000206 RAX: ea705fd173b47200 RBX: 1ffff920009e7f18 RCX: ffffffff913eff03 RDX: dffffc0000000000 RSI: ffffffff8a8b2980 RDI: 0000000000000001 RBP: ffffc90004f3f930 R08: ffffffff8186dcf0 R09: ffffed10023bb80b R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff920009e7f14 R14: ffffc90004f3f8c0 R15: 0000000000000246 spin_unlock_irqrestore include/linux/spinlock.h:418 [inline] unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1538 [inline] release_pages+0x1b89/0x1f40 mm/swap.c:960 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu mm/mmu_gather.c:247 [inline] tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:338 exit_mmap+0x3cd/0x670 mm/mmap.c:3188 __mmput+0x112/0x3b0 kernel/fork.c:1126 exit_mm+0x688/0x7f0 kernel/exit.c:548 do_exit+0x626/0x2480 kernel/exit.c:859 do_group_exit+0x144/0x310 kernel/exit.c:994 __do_sys_exit_group kernel/exit.c:1005 [inline] __se_sys_exit_group kernel/exit.c:1003 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1003 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f1ffc34ebc9 Code: Unable to access opcode bytes at RIP 0x7f1ffc34eb9f. RSP: 002b:00007fff85698c58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1ffc34ebc9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 00007f1ffc3c92b0 R08: ffffffffffffffb8 R09: 0000000000000006 R10: 0000000000000006 R11: 0000000000000246 R12: 00007f1ffc3c92b0 R13: 0000000000000000 R14: 00007f1ffc3c9d00 R15: 00007f1ffc31fe10 addr ffffc90004f3f8a0 is located in stack of task syz-executor236/19553 at offset 0 in frame: _raw_spin_unlock_irqrestore+0x0/0x130 this frame has 1 object: [32, 40) 'flags.i.i.i.i' Memory state around the buggy address: ffffc90004f3f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004f3f800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90004f3f880: 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00 ^ ffffc90004f3f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004f3f980: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f2 f2 ================================================================== ---------------- 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 f2 bd a2 f7 call 0xf7a2be06 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 f7 f4 2f f7 call 0xf72ff526 <-- trapping instruction 2f: 65 8b 05 c8 02 db 75 mov %gs:0x75db02c8(%rip),%eax # 0x75db02fe 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