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
