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authorChristoph Hellwig <hch@lst.de>2020-04-24 08:43:38 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2020-04-27 02:07:40 -0400
commit32927393dc1ccd60fb2bdc05b9e8e88753761469 (patch)
treec488a5564cdde7594c953219a98e22fb4865c812 /kernel/umh.c
parentf461d2dcd511c020a26d4d791fae595c65ed09b6 (diff)
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sysctl: pass kernel pointers to ->proc_handler
Instead of having all the sysctl handlers deal with user pointers, which is rather hairy in terms of the BPF interaction, copy the input to and from userspace in common code. This also means that the strings are always NUL-terminated by the common code, making the API a little bit safer. As most handler just pass through the data to one of the common handlers a lot of the changes are mechnical. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/umh.c')
-rw-r--r--kernel/umh.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/umh.c b/kernel/umh.c
index 7f255b5a8845..9788ed481a6a 100644
--- a/kernel/umh.c
+++ b/kernel/umh.c
@@ -630,7 +630,7 @@ int call_usermodehelper(const char *path, char **argv, char **envp, int wait)
EXPORT_SYMBOL(call_usermodehelper);
static int proc_cap_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table t;
unsigned long cap_array[_KERNEL_CAPABILITY_U32S];