Hello, syzbot found the following issue on: HEAD commit: 1fb918967b56 Merge tag 'for-6.11-rc3-tag' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=119e0ad5980000 kernel config: https://syzkaller.appspot.com/x/.config?x=77bd8f74037eecb dashboard link: https://syzkaller.appspot.com/bug?extid=1f49e6ed8370198296d4 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/63f8e12ef21f/disk-1fb91896.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d776ae2f2dcd/vmlinux-1fb91896.xz kernel image: https://storage.googleapis.com/syzbot-assets/9636a1ac2746/bzImage-1fb91896.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1f49e6ed8370198296d4@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KCSAN: data-race in pipe_poll / pipe_release write to 0xffff888111d4fc68 of 4 bytes by task 12262 on cpu 1: pipe_release+0xb3/0x1c0 fs/pipe.c:731 __fput+0x192/0x6f0 fs/file_table.c:422 ____fput+0x15/0x20 fs/file_table.c:450 task_work_run+0x13a/0x1a0 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x5dd/0x1720 kernel/exit.c:882 do_group_exit+0x142/0x150 kernel/exit.c:1031 __do_sys_exit_group kernel/exit.c:1042 [inline] __se_sys_exit_group kernel/exit.c:1040 [inline] __x64_sys_exit_group+0x1f/0x20 kernel/exit.c:1040 x64_sys_call+0x2d5d/0x2d60 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 0xffff888111d4fc68 of 4 bytes by task 3249 on cpu 0: pipe_poll+0x17d/0x260 fs/pipe.c:689 vfs_poll include/linux/poll.h:84 [inline] do_select+0x959/0xfa0 fs/select.c:538 core_sys_select+0x362/0x530 fs/select.c:681 do_pselect fs/select.c:763 [inline] __do_sys_pselect6 fs/select.c:804 [inline] __se_sys_pselect6+0x213/0x280 fs/select.c:795 __x64_sys_pselect6+0x78/0x90 fs/select.c:795 x64_sys_call+0x26f7/0x2d60 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: 0 UID: 0 PID: 3249 Comm: syz-executor Not tainted 6.11.0-rc3-syzkaller-00066-g1fb918967b56 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
