hfsplus: Initialize directory subfolders in hfsplus_mknod Addresses uninitialized subfolders attribute being used in `hfsplus_subfolders_inc` and `hfsplus_subfolders_dec`. Fixes: https://syzkaller.appspot.com/bug?extid=fdedff847a0e5e84c39f Reported-by: syzbot+fdedff847a0e5e84c39f@xxxxxxxxxxxxxxxxxxxxxxxxx Closes: https://syzkaller.appspot.com/x/report.txt?x=16efda06680000 Signed-off-by: Siddharth Menon <simeddon@xxxxxxxxx> --- fs/hfsplus/dir.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c index f5c4b3e31a1c..331c4118bc8e 100644 --- a/fs/hfsplus/dir.c +++ b/fs/hfsplus/dir.c @@ -485,6 +485,9 @@ static int hfsplus_mknod(struct mnt_idmap *idmap, struct inode *dir, mutex_lock(&sbi->vh_mutex); inode = hfsplus_new_inode(dir->i_sb, dir, mode); + if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) + HFSPLUS_I(dir)->subfolders = 0; + if (!inode) goto out; -- 2.39.2
