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param: fix uninitialized read with CONFIG_DEBUG_LOCK_ALLOC

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ignore_lockdep is uninitialized, and sysfs_attr_init() doesn't initialize
it, so memset to 0.

Reported-by: Huang Ying <ying.huang@intel.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2015-01-20 09:07:04 +10:30
parent 574732c73d
commit c772be5231
1 changed files with 1 additions and 0 deletions
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1
kernel/params.c
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@ -642,6 +642,7 @@ static __modinit int add_sysfs_param(struct module_kobject *mk,
mk->mp->grp.attrs = new_attrs; mk->mp->grp.attrs = new_attrs;
/* Tack new one on the end. */ /* Tack new one on the end. */
memset(&mk->mp->attrs[mk->mp->num], 0, sizeof(mk->mp->attrs[0]));
sysfs_attr_init(&mk->mp->attrs[mk->mp->num].mattr.attr); sysfs_attr_init(&mk->mp->attrs[mk->mp->num].mattr.attr);
mk->mp->attrs[mk->mp->num].param = kp; mk->mp->attrs[mk->mp->num].param = kp;
mk->mp->attrs[mk->mp->num].mattr.show = param_attr_show; mk->mp->attrs[mk->mp->num].mattr.show = param_attr_show;