linux-kernel - [PATCH 1/3] sysctl: add sanity check for proc

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Date:   Fri,  7 Apr 2017 23:51:05 +0800
From:   Liping Zhang <zlpnobody@....com>
To:     akpm@...ux-foundation.org, mingo@...nel.org, ebiederm@...ssion.com
Cc:     davem@...emloft.net, subashab@...eaurora.org,
        torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
        Liping Zhang <zlpnobody@...il.com>
Subject: [PATCH 1/3] sysctl: add sanity check for proc_douintvec

From: Liping Zhang <zlpnobody@...il.com>

Commit e7d316a02f68 ("sysctl: handle error writing UINT_MAX to u32 fields")
introduced the proc_douintvec helper function, but it forgot to add
the related sanity check when doing register_sysctl_table. So add it now.

Signed-off-by: Liping Zhang <zlpnobody@...il.com>
---
 fs/proc/proc_sysctl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 8f91ec6..d04ea43 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -1074,6 +1074,7 @@ static int sysctl_check_table(const char *path, struct ctl_table *table)
 
 		if ((table->proc_handler == proc_dostring) ||
 		    (table->proc_handler == proc_dointvec) ||
+		    (table->proc_handler == proc_douintvec) ||
 		    (table->proc_handler == proc_dointvec_minmax) ||
 		    (table->proc_handler == proc_dointvec_jiffies) ||
 		    (table->proc_handler == proc_dointvec_userhz_jiffies) ||
-- 
2.5.5