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gfs2: Call unlock_new_inode before d_instantiate

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As Neil Brown describes in detail in the link referenced below, new
inodes must be unlocked before they can be instantiated.

An even better fix is to use d_instantiate_new(), which combines
d_instantiate() and unlock_new_inode().

Fixes: 3d36e57ff7 ("gfs2: gfs2_create_inode rework")
Reported-by: syzbot+0ea5108a1f5fb4fcc2d8@syzkaller.appspotmail.com
Link: https://lore.kernel.org/linux-fsdevel/177153754005.8396.8777398743501764194@noble.neil.brown.name/
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2026-02-23 12:04:05 +01:00
parent 7141433fbe
commit 2ff7cf7e06
1 changed files with 1 additions and 2 deletions
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3
fs/gfs2/inode.c
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@ -892,7 +892,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
goto fail_gunlock4;
mark_inode_dirty(inode);
d_instantiate(dentry, inode);
d_instantiate_new(dentry, inode);
/* After instantiate, errors should result in evict which will destroy
* both inode and iopen glocks properly. */
if (file) {
@ -904,7 +904,6 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
gfs2_glock_dq_uninit(&gh);
gfs2_glock_put(io_gl);
gfs2_qa_put(dip);
unlock_new_inode(inode);
return error;
fail_gunlock4: