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ceph_wait_on_conflict_unlink(): grab reference before dropping ->d_lock

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[ Upstream commit dc32464a5f ]

Use of dget() after we'd dropped ->d_lock is too late - dentry might
be gone by that point.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Al Viro
2023-09-14 21:55:29 -04:00
committed by Greg Kroah-Hartman
parent 9eab5008db
commit 803cc77a3a
1 changed files with 1 additions and 1 deletions
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2
fs/ceph/mds_client.c
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@@ -709,8 +709,8 @@ int ceph_wait_on_conflict_unlink(struct dentry *dentry)
if (!d_same_name(udentry, pdentry, &dname)) if (!d_same_name(udentry, pdentry, &dname))
goto next; goto next;
found = dget_dlock(udentry);
spin_unlock(&udentry->d_lock); spin_unlock(&udentry->d_lock);
found = dget(udentry);
break; break;
next: next:
spin_unlock(&udentry->d_lock); spin_unlock(&udentry->d_lock);