Unverified Commit 7f2e8c7c authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!15225 cifs: Prevent NULL pointer dereference caused by cifs_sb->rsize is 0 

Merge Pull Request from: @ci-robot 
 
PR sync from: Wang Zhaolong <wangzhaolong1@huawei.com>
https://mailweb.openeuler.org/archives/list/kernel@openeuler.org/message/DY6V2KMHNJWICAHG5XQKNMNJMIDCWVSL/ 
 
https://gitee.com/openeuler/kernel/issues/IBO3FG 
 
Link:https://gitee.com/openeuler/kernel/pulls/15225

 

Reviewed-by: default avatarZhang Peng <zhangpeng362@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents d0f1e93a 3319eda6

fs/smb/client/connect.c

+5 −0
Original line number Diff line number Diff line
@@ -3552,6 +3552,11 @@ int cifs_mount_get_tcon(struct cifs_mount_ctx *mnt_ctx) 
	if ((cifs_sb->ctx->rsize == 0) ||

	    (cifs_sb->ctx->rsize > server->ops->negotiate_rsize(tcon, ctx)))

		cifs_sb->ctx->rsize = server->ops->negotiate_rsize(tcon, ctx);

	if (cifs_sb->ctx->rsize == 0) {

		cifs_dbg(VFS, "Negotiated rsize is 0, get connect failed\n");

		rc = -EINVAL;

		goto out;

	}



	/*

	 * The cookie is initialized from volume info returned above.