[moderation] [fs?] KCSAN: data-race in ksys_read / ksys_read (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 4fbbed787267 Merge tag 'timers-core-2024-01-21' of git://g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14a99ee3e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=ba10a94c8ea40fe5
dashboard link: https://syzkaller.appspot.com/bug?extid=fca88e7eee2ae16afd5d
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [bra...@kernel.org ja...@suse.cz linux-...@vger.kernel.org linux-...@vger.kernel.org vi...@zeniv.linux.org.uk]

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ae1396ce8757/disk-4fbbed78.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/779af4d1028c/vmlinux-4fbbed78.xz
kernel image: https://storage.googleapis.com/syzbot-assets/88804f956fb9/bzImage-4fbbed78.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+fca88e...@syzkaller.appspotmail.com

==================================================================
BUG: KCSAN: data-race in ksys_read / ksys_read

read to 0xffff888150168c40 of 8 bytes by task 32624 on cpu 1:
ksys_read+0xad/0x1a0 fs/read_write.c:616
__do_sys_read fs/read_write.c:629 [inline]
__se_sys_read fs/read_write.c:627 [inline]
__x64_sys_read+0x42/0x50 fs/read_write.c:627
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b

write to 0xffff888150168c40 of 8 bytes by task 32625 on cpu 0:
ksys_read+0x11e/0x1a0 fs/read_write.c:621
__do_sys_read fs/read_write.c:629 [inline]
__se_sys_read fs/read_write.c:627 [inline]
__x64_sys_read+0x42/0x50 fs/read_write.c:627
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x0000000000000038 -> 0x0000000000000058

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 32625 Comm: syz-executor.3 Not tainted 6.7.0-syzkaller-13004-g4fbbed787267 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
==================================================================


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.