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Revert "fs/ntfs3: Replace inode_trylock with inode_lock"

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[ Upstream commit a49f0abd89 ]

This reverts commit 69505fe98f.

Initially, conditional lock acquisition was removed to fix an xfstest bug
that was observed during internal testing. The deadlock reported by syzbot
is resolved by reintroducing conditional acquisition. The xfstest bug no
longer occurs on kernel version 6.16-rc1 during internal testing. I
assume that changes in other modules may have contributed to this.

Fixes: 69505fe98f ("fs/ntfs3: Replace inode_trylock with inode_lock")
Reported-by: syzbot+a91fcdbd2698f99db8f4@syzkaller.appspotmail.com
Suggested-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Konstantin Komarov 2025-07-04 15:11:32 +02:00 committed by Greg Kroah-Hartman
parent 5055b7db94
commit b356ee013a
1 changed files with 4 additions and 1 deletions
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5
fs/ntfs3/file.c
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@ -392,7 +392,10 @@ static int ntfs_file_mmap(struct file *file, struct vm_area_struct *vma)
}
if (ni->i_valid < to) {
inode_lock(inode);
if (!inode_trylock(inode)) {
err = -EAGAIN;
goto out;
}
err = ntfs_extend_initialized_size(file, ni,
ni->i_valid, to);
inode_unlock(inode);