linux-kernel - [BUG] staging: lustre: Possible null function pointer in ctx_refresh

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Message-ID: <6920e093-ad62-56dc-6f58-36cf8d7ed3b4@gmail.com>
Date:   Thu, 26 Jul 2018 22:02:22 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     oleg.drokin@...el.com, andreas.dilger@...el.com,
        jsimmons@...radead.org, paf@...y.com, namit@...are.com
Cc:     lustre-devel@...ts.lustre.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: [BUG] staging: lustre: Possible null function pointer in
 ctx_refresh_timeout()

In Linux-4.16, drivers/staging/lustre/lustre/ptlrp/sec.c,

557. int ctx_refresh_timeout(...) {
             .......
573. req->rq_cli_ctx->cc_ops->force_die(req->rq_cli_ctx, 0);
             ......
575. }

For x86 kernel configuration, there is no assignment of the function 
pointer ".force_die" in the kernel code.
So calling the function pointer in line 573 may cause a null pointer 
dereference.


Best wishes,
Jia-Ju Bai