diff options
| author | Muchun Song | 2023-05-23 10:40:17 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-07-19 16:21:53 +0200 |
| commit | f5d80ad7b6780c8b2692491029109d551ec41b61 (patch) | |
| tree | d0f332fd009d35a7d224b059302cac292786d730 /fs | |
| parent | 9c4f52b61804f075d981c654107c6dbb52816aa3 (diff) | |
kernfs: fix missing kernfs_idr_lock to remove an ID from the IDR
[ Upstream commit 30480b988f88c279752f3202a26b6fee5f586aef ]
The root->ino_idr is supposed to be protected by kernfs_idr_lock, fix
it.
Fixes: 488dee96bb62 ("kernfs: allow creating kernfs objects with arbitrary uid/gid")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230523024017.24851-1-songmuchun@bytedance.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/kernfs/dir.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index f33b3baad07c..44842e6cf0a9 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -652,7 +652,9 @@ static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root, return kn; err_out3: + spin_lock(&kernfs_idr_lock); idr_remove(&root->ino_idr, (u32)kernfs_ino(kn)); + spin_unlock(&kernfs_idr_lock); err_out2: kmem_cache_free(kernfs_node_cache, kn); err_out1: |