sysctl: add sanity check for proc_douintvec
authorLiping Zhang <zlpnobody@gmail.com>
Fri, 7 Apr 2017 15:51:05 +0000 (23:51 +0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 7 Apr 2017 16:46:44 +0000 (09:46 -0700)
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@gmail.com>
Cc: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/proc/proc_sysctl.c

index 8f91ec66baa3261299430c47fce487bf5164246c..d04ea43499096e4fc02eec0f363683e3713f65ba 100644 (file)
@@ -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) ||