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trace: fix an incorrect __user annotation on stack_trace_sysctl

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No user pointers for sysctls anymore.

Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
Reported-by: build test robot <lkp@intel.com>
Change-Id: I0b23a303ac9bd880abf7797d16311183c2b40dab
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Tashfin Shakeer Rhythm <tashfinshakeerrhythm@gmail.com>
This commit is contained in:
Christoph Hellwig 2020-06-03 07:52:37 +02:00 • committed by basamaryan
commit ab19bdd2d6
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GPG key ID: 210D5384FB2A5885
2 changed files with 4 additions and 6 deletions
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5
include/linux/ftrace.h
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@ -281,9 +281,8 @@ 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);

5
kernel/trace/trace_stack.c
View file

@ -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;