From: Namjae Jeon Date: Wed, 11 Oct 2023 14:29:49 +0000 (+0900) Subject: ksmbd: fix Null pointer dereferences in ksmbd_update_fstate() X-Git-Tag: v6.6.17~3748^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=414849040fcf11d45025b8ae26c9fd91da1465da;p=platform%2Fkernel%2Flinux-rpi.git ksmbd: fix Null pointer dereferences in ksmbd_update_fstate() 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 Signed-off-by: Namjae Jeon Signed-off-by: Steve French --- diff --git a/fs/smb/server/vfs_cache.c b/fs/smb/server/vfs_cache.c index 1c5c397..c91eac6 100644 --- a/fs/smb/server/vfs_cache.c +++ b/fs/smb/server/vfs_cache.c @@ -603,6 +603,9 @@ 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);