From 4773ef33fc6e59bad2e5d19e334de2fa79c27b74 Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Fri, 18 Sep 2020 21:20:37 -0700 Subject: stackleak: let stack_erasing_sysctl take a kernel pointer buffer Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler") changed ctl_table.proc_handler to take a kernel pointer. Adjust the signature of stack_erasing_sysctl to match ctl_table.proc_handler which fixes the following sparse warning: kernel/stackleak.c:31:50: warning: incorrect type in argument 3 (different address spaces) kernel/stackleak.c:31:50: expected void * kernel/stackleak.c:31:50: got void [noderef] __user *buffer Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler") Signed-off-by: Tobias Klauser Signed-off-by: Andrew Morton Cc: Christoph Hellwig Cc: Al Viro Link: https://lkml.kernel.org/r/20200907093253.13656-1-tklauser@distanz.ch Signed-off-by: Linus Torvalds --- kernel/stackleak.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/stackleak.c') diff --git a/kernel/stackleak.c b/kernel/stackleak.c index a8fc9ae1d03d..ce161a8e8d97 100644 --- a/kernel/stackleak.c +++ b/kernel/stackleak.c @@ -20,7 +20,7 @@ static DEFINE_STATIC_KEY_FALSE(stack_erasing_bypass); int stack_erasing_sysctl(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, loff_t *ppos) + void *buffer, size_t *lenp, loff_t *ppos) { int ret = 0; int state = !static_branch_unlikely(&stack_erasing_bypass); -- cgit v1.2.3-58-ga151