================================================================== BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42 Read of size 8 at addr ffffc90003157ba0 by task syz.4.19/3646 CPU: 1 PID: 3646 Comm: syz.4.19 Not tainted 5.15.161-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+0x1e3/0x2d0 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 62 6c a2 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 57 ac 2f f7 65 8b 05 d8 b2 da 75 85 c0 74 3f 48 c7 04 24 0e 36 RSP: 0018:ffffc90003157ba0 EFLAGS: 00000206 RAX: 20d673cb9f72f600 RBX: 1ffff9200062af78 RCX: ffffffff913f0f03 RDX: dffffc0000000000 RSI: ffffffff8a8b2a00 RDI: 0000000000000001 RBP: ffffc90003157c30 R08: ffffffff8186db40 R09: ffffed1017365441 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff9200062af74 R14: ffffc90003157bc0 R15: 0000000000000246 hrtimer_start_expires include/linux/hrtimer.h:434 [inline] hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1966 [inline] do_nanosleep+0x164/0x7b0 kernel/time/hrtimer.c:2042 hrtimer_nanosleep+0x24d/0x490 kernel/time/hrtimer.c:2098 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1313 [inline] __se_sys_clock_nanosleep+0x323/0x3b0 kernel/time/posix-timers.c:1290 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: 0033:0x7f15eac45b85 Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 c6 57 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 1f 58 ff ff 48 8b 04 24 48 83 c4 28 f7 d8 RSP: 002b:00007ffce04bc580 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 00007f15eada1fa0 RCX: 00007f15eac45b85 RDX: 00007ffce04bc5c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f15eada3aa0 R08: 0000000000000000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000e679 R13: 000000000000015e R14: 00007f15eada3aa0 R15: 00007f15eada2300 addr ffffc90003157ba0 is located in stack of task syz.4.19/3646 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: ffffc90003157a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003157b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90003157b80: 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00 ^ ffffc90003157c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003157c80: 00 00 00 00 f1 f1 f1 f1 00 00 f3 f3 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 62 6c a2 f7 call 0xf7a26c76 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 57 ac 2f f7 call 0xf72fac86 <-- trapping instruction 2f: 65 8b 05 d8 b2 da 75 mov %gs:0x75dab2d8(%rip),%eax # 0x75dab30e 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