Hello, syzbot found the following issue on: HEAD commit: cb0856346a60 Merge tag 'mm-hotfixes-stable-2023-04-19-16-3.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10b9e8bfc80000 kernel config: https://syzkaller.appspot.com/x/.config?x=fa4baf7c6b35b5d5 dashboard link: https://syzkaller.appspot.com/bug?extid=f682b67a78ce05867e78 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/a02dd7789fb2/disk-cb085634.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a1a1eac454f6/vmlinux-cb085634.xz kernel image: https://storage.googleapis.com/syzbot-assets/bb0447014913/bzImage-cb085634.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f682b67a78ce05867e78@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KCSAN: data-race in generic_fillattr / shmem_unlink read-write to 0xffff888104d167b8 of 8 bytes by task 23887 on cpu 1: shmem_unlink+0x102/0x190 mm/shmem.c:3036 vfs_unlink+0x261/0x3e0 fs/namei.c:4250 do_unlinkat+0x266/0x4f0 fs/namei.c:4316 __do_sys_unlink fs/namei.c:4364 [inline] __se_sys_unlink fs/namei.c:4362 [inline] __x64_sys_unlink+0x30/0x40 fs/namei.c:4362 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff888104d167b8 of 8 bytes by task 27823 on cpu 0: i_size_read include/linux/fs.h:866 [inline] generic_fillattr+0x13f/0x1e0 fs/stat.c:58 shmem_getattr+0x32a/0x3b0 mm/shmem.c:1068 vfs_getattr_nosec+0x1e3/0x3c0 fs/stat.c:133 vfs_getattr fs/stat.c:170 [inline] vfs_statx+0x156/0x300 fs/stat.c:242 vfs_fstatat fs/stat.c:276 [inline] __do_sys_newfstatat fs/stat.c:446 [inline] __se_sys_newfstatat+0x8a/0x2a0 fs/stat.c:440 __x64_sys_newfstatat+0x55/0x60 fs/stat.c:440 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x00000000000000c8 -> 0x00000000000000b4 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 27823 Comm: udevd Not tainted 6.3.0-rc7-syzkaller-00089-gcb0856346a60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 ================================================================== --- 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.
