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Wed, 21 Jan 2026 07:02:20 -0800 (PST) From: Prithvi Tambewagh To: syzbot+f6e8174215573a84b797@syzkaller.appspotmail.com Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, Prithvi Tambewagh Subject: Testing for v2: configfs: add lock class key to struct configfs_fragment for frag_sem Date: Wed, 21 Jan 2026 20:32:11 +0530 Message-Id: <20260121150211.82216-1-activprithvi@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <6767d8ea.050a0220.226966.0021.GAE@google.com> References: <6767d8ea.050a0220.226966.0021.GAE@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" #syz test upstream 3a8660878839faadb4f1a6dd72c3179c1df56787 Signed-off-by: Prithvi Tambewagh --- fs/configfs/configfs_internal.h | 1 + fs/configfs/dir.c | 6 +++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_interna= l.h index 0b969d0eb8ff..15bcde6c878b 100644 --- a/fs/configfs/configfs_internal.h +++ b/fs/configfs/configfs_internal.h @@ -21,6 +21,7 @@ struct configfs_fragment { atomic_t frag_count; struct rw_semaphore frag_sem; + struct lock_class_key frag_sem_key; bool frag_dead; }; =20 diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c index 81f4f06bc87e..10c76cef88c9 100644 --- a/fs/configfs/dir.c +++ b/fs/configfs/dir.c @@ -163,6 +163,8 @@ static struct configfs_fragment *new_fragment(void) if (p) { atomic_set(&p->frag_count, 1); init_rwsem(&p->frag_sem); + lockdep_register_key(&p->frag_sem_key); + lockdep_set_class(&p->frag_sem, &p->frag_sem_key); p->frag_dead =3D false; } return p; @@ -170,8 +172,10 @@ static struct configfs_fragment *new_fragment(void) =20 void put_fragment(struct configfs_fragment *frag) { - if (frag && atomic_dec_and_test(&frag->frag_count)) + if (frag && atomic_dec_and_test(&frag->frag_count)) { + lockdep_unregister_key(&frag->frag_sem_key); kfree(frag); + } } =20 struct configfs_fragment *get_fragment(struct configfs_fragment *frag) base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787 --=20 2.34.1