syzbot

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BUG: KCSAN: data-race in __perf_event_overflow / perf_event_exit_event

read to 0xffff888131904844 of 4 bytes by task 30697 on cpu 1:
 perf_event_wakeup kernel/events/core.c:6626 [inline]
 perf_event_exit_event+0x261/0x400 kernel/events/core.c:12972
 perf_event_exit_task_context kernel/events/core.c:13038 [inline]
 perf_event_exit_task+0x3d1/0x520 kernel/events/core.c:13069
 do_exit+0x5e7/0x1660 kernel/exit.c:878
 do_group_exit+0x141/0x150 kernel/exit.c:1019
 __do_sys_exit_group kernel/exit.c:1030 [inline]
 __se_sys_exit_group kernel/exit.c:1028 [inline]
 __x64_sys_exit_group+0x1f/0x20 kernel/exit.c:1028
 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

write to 0xffff888131904844 of 4 bytes by interrupt on cpu 0:
 __perf_event_overflow+0x7f/0x3e0 kernel/events/core.c:9502
 perf_swevent_hrtimer+0x23d/0x2e0 kernel/events/core.c:10974
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x217/0x700 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x20d/0x7b0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
 __sysvec_apic_timer_interrupt+0x73/0x210 arch/x86/kernel/apic/apic.c:1113
 sysvec_apic_timer_interrupt+0x68/0x80 arch/x86/kernel/apic/apic.c:1107
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
 mas_next_nentry lib/maple_tree.c:4766 [inline]
 mas_next_entry+0x52d/0x800 lib/maple_tree.c:4838
 mas_find+0x95/0x1a0 lib/maple_tree.c:6118
 vma_next include/linux/mm.h:745 [inline]
 acct_collect+0x110/0x440 kernel/acct.c:565
 do_exit+0x50a/0x1660 kernel/exit.c:848
 do_group_exit+0x101/0x150 kernel/exit.c:1019
 get_signal+0xeb1/0xff0 kernel/signal.c:2859
 arch_do_signal_or_restart+0x89/0x2a0 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop+0x6f/0xe0 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 30719 Comm: syz-executor.2 Tainted: G        W          6.3.0-rc6-syzkaller-00046-gde4664485abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
==================================================================
net_ratelimit: 6 callbacks suppressed
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.
TCP: request_sock_TCPv6: Possible SYN flooding on port [::]:20002. Sending cookies.