Re: [syzbot] [ntfs3?] KASAN: slab-use-after-free Read in chrdev_open

[syzbot <syzbot+5d34cc6474499a5ff516@syzkaller.appspotmail.com>]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

./include/linux/fs_pin.h:4:8: error: redefinition of 'fs_pin'
./include/linux/fs_pin.h:14:20: error: redefinition of 'init_fs_pin'
fs/mount.h:8:8: error: redefinition of 'mnt_namespace'
fs/mount.h:21:8: error: redefinition of 'mnt_pcp'
fs/mount.h:26:8: error: redefinition of 'mountpoint'
fs/mount.h:33:8: error: redefinition of 'mount'
fs/mount.h:82:29: error: redefinition of 'real_mount'
fs/mount.h:87:19: error: redefinition of 'mnt_has_parent'
fs/mount.h:92:19: error: redefinition of 'is_mounted'
fs/mount.h:102:20: error: redefinition of '__path_is_mountpoint'
fs/mount.h:110:20: error: redefinition of 'detach_mounts'
fs/mount.h:117:20: error: redefinition of 'get_mnt_ns'
fs/mount.h:124:8: error: redefinition of 'proc_mounts'
fs/mount.h:133:20: error: redefinition of 'is_local_mountpoint'
fs/mount.h:141:20: error: redefinition of 'is_anon_ns'
fs/mount.h:146:20: error: redefinition of 'move_from_ns'


Tested on:

commit:         83a7eefe Linux 6.10-rc3
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel config:  https://syzkaller.appspot.com/x/.config?x=5a05c230e142f2bc
dashboard link: https://syzkaller.appspot.com/bug?extid=5d34cc6474499a5ff516
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1606492e980000