syzbot

==================================================================
BUG: KCSAN: data-race in pipe_poll / pipe_release

write to 0xffff8881193bdea8 of 4 bytes by task 4317 on cpu 0:
 pipe_release+0xad/0x1c0 fs/pipe.c:732
 __fput+0x2ac/0x640 fs/file_table.c:450
 ____fput+0x1c/0x30 fs/file_table.c:478
 task_work_run+0x13a/0x1a0 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x5d8/0x17f0 kernel/exit.c:938
 do_group_exit+0x142/0x150 kernel/exit.c:1087
 __do_sys_exit_group kernel/exit.c:1098 [inline]
 __se_sys_exit_group kernel/exit.c:1096 [inline]
 __x64_sys_exit_group+0x1f/0x20 kernel/exit.c:1096
 x64_sys_call+0x2db8/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:232
 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 0xffff8881193bdea8 of 4 bytes by task 3288 on cpu 1:
 pipe_poll+0x173/0x250 fs/pipe.c:690
 vfs_poll include/linux/poll.h:82 [inline]
 select_poll_one fs/select.c:480 [inline]
 do_select+0x8d4/0xfc0 fs/select.c:536
 core_sys_select+0x362/0x530 fs/select.c:677
 do_pselect fs/select.c:759 [inline]
 __do_sys_pselect6 fs/select.c:802 [inline]
 __se_sys_pselect6+0x21b/0x280 fs/select.c:793
 __x64_sys_pselect6+0x78/0x90 fs/select.c:793
 x64_sys_call+0x2ac2/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:271
 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: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3288 Comm: syz-executor Not tainted 6.13.0-syzkaller-09383-gebbb8be421ee #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
==================================================================