5.15-stable review patch. If anyone has any objections, please let me know.
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From: Namjae Jeon linkinjeon@kernel.org
[ Upstream commit 414849040fcf11d45025b8ae26c9fd91da1465da ]
Coverity Scan report the following one. This report is a false alarm. Because fp is never NULL when rc is zero. This patch add null check for fp in ksmbd_update_fstate to make alarm silence.
*** CID 1568583: Null pointer dereferences (FORWARD_NULL) /fs/smb/server/smb2pdu.c: 3408 in smb2_open() 3402 path_put(&path); 3403 path_put(&parent_path); 3404 } 3405 ksmbd_revert_fsids(work); 3406 err_out1: 3407 if (!rc) {
CID 1568583: Null pointer dereferences (FORWARD_NULL) Passing null pointer "fp" to "ksmbd_update_fstate", which dereferences it.
3408 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED); 3409 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len); 3410 } 3411 if (rc) { 3412 if (rc == -EINVAL) 3413 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
Fixes: e2b76ab8b5c9 ("ksmbd: add support for read compound") Reported-by: Coverity Scan scan-admin@coverity.com Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ksmbd/vfs_cache.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/fs/ksmbd/vfs_cache.c +++ b/fs/ksmbd/vfs_cache.c @@ -602,6 +602,9 @@ err_out: void ksmbd_update_fstate(struct ksmbd_file_table *ft, struct ksmbd_file *fp, unsigned int state) { + if (!fp) + return; + write_lock(&ft->lock); fp->f_state = state; write_unlock(&ft->lock);