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BUG: KCSAN: data-race in fasync_remove_entry / kill_fasync

write to 0xffff888113e85b08 of 8 bytes by task 14233 on cpu 0:
 fasync_remove_entry+0xd2/0x130 fs/fcntl.c:909
 fasync_helper+0x96/0xc0 fs/fcntl.c:1008
 pipe_fasync+0x8b/0x160 fs/pipe.c:754
 __fput+0x68e/0x6f0 fs/file_table.c:419
 __fput_sync+0x44/0x60 fs/file_table.c:507
 __do_sys_close fs/open.c:1566 [inline]
 __se_sys_close+0x101/0x1b0 fs/open.c:1551
 __x64_sys_close+0x1f/0x30 fs/open.c:1551
 x64_sys_call+0x25cb/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:4
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888113e85b08 of 8 bytes by task 14232 on cpu 1:
 kill_fasync+0x24/0x150 fs/fcntl.c:1047
 wakeup_pipe_readers fs/splice.c:183 [inline]
 splice_file_to_pipe+0x317/0x390 fs/splice.c:1298
 do_splice+0xc97/0x1150 fs/splice.c:1379
 __do_splice fs/splice.c:1436 [inline]
 __do_sys_splice fs/splice.c:1652 [inline]
 __se_sys_splice+0x24c/0x390 fs/splice.c:1634
 __x64_sys_splice+0x78/0x90 fs/splice.c:1634
 x64_sys_call+0x2945/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:276
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0xffff888103ed61b0 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 14232 Comm: syz.0.3685 Not tainted 6.11.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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