From: syzbot <syzbot+b7c3ba8cdc2f6cf83c21@syzkaller.appspotmail.com>
To: gregkh@linuxfoundation.org, jirislaby@kernel.org,
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: [syzbot] [kernel?] KCSAN: data-race in __fput / __tty_hangup (4)
Date: Fri, 21 Apr 2023 01:18:41 -0700 [thread overview]
Message-ID: <00000000000013aaac05f9d44e7a@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: fcd476ea6a88 Merge tag 'urgent-rcu.2023.03.28a' of git://g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=146618b9c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=f7350c77b8056a38
dashboard link: https://syzkaller.appspot.com/bug?extid=b7c3ba8cdc2f6cf83c21
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f3d8ce4faab0/disk-fcd476ea.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/fc53d9dee279/vmlinux-fcd476ea.xz
kernel image: https://storage.googleapis.com/syzbot-assets/22ad755d39b2/bzImage-fcd476ea.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b7c3ba8cdc2f6cf83c21@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in __fput / __tty_hangup
write to 0xffff88813b31e828 of 8 bytes by task 17702 on cpu 0:
__tty_hangup+0x1e2/0x510 drivers/tty/tty_io.c:622
tty_vhangup+0x17/0x20 drivers/tty/tty_io.c:701
pty_close+0x262/0x280 drivers/tty/pty.c:79
tty_release+0x204/0x930 drivers/tty/tty_io.c:1753
__fput+0x245/0x570 fs/file_table.c:321
____fput+0x15/0x20 fs/file_table.c:349
task_work_run+0x123/0x160 kernel/task_work.c:179
get_signal+0xe5c/0xfe0 kernel/signal.c:2635
arch_do_signal_or_restart+0x89/0x2b0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop+0x6d/0xe0 kernel/entry/common.c:168
exit_to_user_mode_prepare+0x6a/0xa0 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
read to 0xffff88813b31e828 of 8 bytes by task 17705 on cpu 1:
__fput+0x21c/0x570 fs/file_table.c:320
____fput+0x15/0x20 fs/file_table.c:349
task_work_run+0x123/0x160 kernel/task_work.c:179
get_signal+0xe5c/0xfe0 kernel/signal.c:2635
arch_do_signal_or_restart+0x89/0x2b0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop+0x6d/0xe0 kernel/entry/common.c:168
exit_to_user_mode_prepare+0x6a/0xa0 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: 0xffffffff84e91ed0 -> 0xffffffff84e91dc0
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 17705 Comm: syz-executor.0 Not tainted 6.3.0-rc4-syzkaller-00034-gfcd476ea6a88 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/17/2023
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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next reply other threads:[~2023-04-21 8:18 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-21 8:18 syzbot [this message]
2023-04-21 8:21 ` [syzbot] [kernel?] KCSAN: data-race in __fput / __tty_hangup (4) Dmitry Vyukov
2023-04-21 15:12 ` Tetsuo Handa
2023-04-21 16:02 ` Tetsuo Handa
2023-04-23 23:34 ` Al Viro
2023-04-23 23:55 ` Tetsuo Handa
2023-04-24 0:44 ` Al Viro
2023-04-24 1:09 ` Tetsuo Handa
2023-04-25 14:47 ` Tetsuo Handa
2023-04-25 16:03 ` Al Viro
2023-04-25 22:09 ` Tetsuo Handa
2023-04-26 11:05 ` [PATCH] tty: tty_io: remove hung_up_tty_fops Tetsuo Handa
2023-04-28 16:27 ` Nathan Chancellor
2023-04-28 16:41 ` Tetsuo Handa
2023-04-28 17:11 ` Al Viro
2023-04-29 10:43 ` Tetsuo Handa
2023-04-28 17:31 ` Greg Kroah-Hartman
2023-04-29 15:21 ` Guenter Roeck
2023-05-01 18:42 ` Geert Uytterhoeven
2023-05-14 1:02 ` [PATCH v2] " Tetsuo Handa
2023-05-30 10:44 ` Greg Kroah-Hartman
2023-05-30 11:57 ` Tetsuo Handa
2023-05-30 12:51 ` Greg Kroah-Hartman
2024-04-27 6:20 ` [PATCH v3] " Tetsuo Handa
2024-04-27 19:02 ` Linus Torvalds
2024-04-28 10:19 ` Tetsuo Handa
2024-04-28 18:50 ` Linus Torvalds
2024-04-29 13:55 ` Marco Elver
2024-04-29 15:38 ` Linus Torvalds
2024-05-01 18:45 ` Paul E. McKenney
2024-05-01 18:56 ` Linus Torvalds
2024-05-01 19:02 ` Paul E. McKenney
2024-05-01 20:14 ` Marco Elver
2024-05-01 21:06 ` Linus Torvalds
2024-05-01 21:20 ` Linus Torvalds
2024-05-01 21:49 ` Paul E. McKenney
2024-05-01 22:32 ` Paul E. McKenney
2024-05-02 16:37 ` Boqun Feng
2024-05-03 23:59 ` Paul E. McKenney
2024-05-04 0:14 ` Linus Torvalds
2024-05-04 5:08 ` Paul E. McKenney
2024-05-04 17:50 ` Linus Torvalds
2024-05-04 18:18 ` Paul E. McKenney
2024-05-04 19:11 ` Linus Torvalds
2024-05-04 19:25 ` Linus Torvalds
2024-05-04 22:17 ` Paul E. McKenney
2024-05-04 22:04 ` Paul E. McKenney
2024-05-02 14:14 ` Marco Elver
2024-05-02 16:42 ` Tetsuo Handa
2024-05-02 17:20 ` Marco Elver
2024-05-02 17:29 ` Linus Torvalds
2024-05-02 18:14 ` Al Viro
2024-05-02 19:29 ` Marco Elver
2024-05-02 23:54 ` Tetsuo Handa
2024-05-03 1:12 ` Linus Torvalds
2023-04-23 13:28 ` [syzbot] [kernel?] KCSAN: data-race in __fput / __tty_hangup (4) Tetsuo Handa
2023-04-23 14:00 ` Greg Kroah-Hartman
2023-04-23 14:03 ` Greg Kroah-Hartman
2023-04-23 14:17 ` Tetsuo Handa
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