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authorChristoph Hellwig <hch@lst.de>2020-06-03 07:52:37 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2020-06-08 10:13:56 -0400
commit7ff0d4490ebadae8037a079a70c5cac13385a808 (patch)
treed69d20180f5247f90e4beb9ecb3d57729c6f7751
parenta2541dcb51127dc31934ab93bc99ae7df458e41b (diff)
downloadlinux-7ff0d4490ebadae8037a079a70c5cac13385a808.tar.bz2
trace: fix an incorrect __user annotation on stack_trace_sysctl
No user pointers for sysctls anymore. Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler") Reported-by: build test robot <lkp@intel.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--include/linux/ftrace.h5
-rw-r--r--kernel/trace/trace_stack.c5
2 files changed, 4 insertions, 6 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index ddfc377de0d2..fce81238f304 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -319,9 +319,8 @@ static inline void arch_ftrace_set_direct_caller(struct pt_regs *regs,
extern int stack_tracer_enabled;
-int stack_trace_sysctl(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos);
+int stack_trace_sysctl(struct ctl_table *table, int write, void *buffer,
+ size_t *lenp, loff_t *ppos);
/* DO NOT MODIFY THIS VARIABLE DIRECTLY! */
DECLARE_PER_CPU(int, disable_stack_tracer);
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index c557f42a9397..98bba4764c52 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -515,9 +515,8 @@ static const struct file_operations stack_trace_filter_fops = {
#endif /* CONFIG_DYNAMIC_FTRACE */
int
-stack_trace_sysctl(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos)
+stack_trace_sysctl(struct ctl_table *table, int write, void *buffer,
+ size_t *lenp, loff_t *ppos)
{
int was_enabled;
int ret;