syzbot

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BUG: KCSAN: data-race in uprobe_dispatcher / uprobe_dispatcher

write to 0xffff888130181ae8 of 8 bytes by task 6969 on cpu 1:
 uprobe_dispatcher+0x46/0x670 kernel/trace/trace_uprobe.c:1489
 handler_chain kernel/events/uprobes.c:2083 [inline]
 handle_swbp kernel/events/uprobes.c:2243 [inline]
 uprobe_notify_resume+0x73a/0x1310 kernel/events/uprobes.c:2309
 exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
 exit_to_user_mode_prepare+0xcb/0x190 kernel/entry/common.c:209
 irqentry_exit_to_user_mode+0x5/0x10 kernel/entry/common.c:315
 asm_exc_int3+0x31/0x40 arch/x86/include/asm/idtentry.h:567

read to 0xffff888130181ae8 of 8 bytes by task 7021 on cpu 0:
 uprobe_dispatcher+0x37/0x670 kernel/trace/trace_uprobe.c:1489
 handler_chain kernel/events/uprobes.c:2083 [inline]
 handle_swbp kernel/events/uprobes.c:2243 [inline]
 uprobe_notify_resume+0x73a/0x1310 kernel/events/uprobes.c:2309
 exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
 exit_to_user_mode_prepare+0xcb/0x190 kernel/entry/common.c:209
 irqentry_exit_to_user_mode+0x5/0x10 kernel/entry/common.c:315
 asm_exc_int3+0x31/0x40 arch/x86/include/asm/idtentry.h:567

value changed: 0x0000000000004307 -> 0x0000000000004308

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7021 Comm: syz-executor.5 Not tainted 5.14.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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