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authorChristoph Hellwig <hch@lst.de>2020-04-24 09:43:38 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2020-04-27 09:07:40 +0300
commit32927393dc1ccd60fb2bdc05b9e8e88753761469 (patch)
treec488a5564cdde7594c953219a98e22fb4865c812 /include/linux/nmi.h
parentf461d2dcd511c020a26d4d791fae595c65ed09b6 (diff)
downloadlinux-32927393dc1ccd60fb2bdc05b9e8e88753761469.tar.xz
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 'include/linux/nmi.h')
-rw-r--r--include/linux/nmi.h15
1 files changed, 5 insertions, 10 deletions
diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index 9003e29cde46..750c7f395ca9 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -202,16 +202,11 @@ static inline void watchdog_update_hrtimer_threshold(u64 period) { }
#endif
struct ctl_table;
-extern int proc_watchdog(struct ctl_table *, int ,
- void __user *, size_t *, loff_t *);
-extern int proc_nmi_watchdog(struct ctl_table *, int ,
- void __user *, size_t *, loff_t *);
-extern int proc_soft_watchdog(struct ctl_table *, int ,
- void __user *, size_t *, loff_t *);
-extern int proc_watchdog_thresh(struct ctl_table *, int ,
- void __user *, size_t *, loff_t *);
-extern int proc_watchdog_cpumask(struct ctl_table *, int,
- void __user *, size_t *, loff_t *);
+int proc_watchdog(struct ctl_table *, int, void *, size_t *, loff_t *);
+int proc_nmi_watchdog(struct ctl_table *, int , void *, size_t *, loff_t *);
+int proc_soft_watchdog(struct ctl_table *, int , void *, size_t *, loff_t *);
+int proc_watchdog_thresh(struct ctl_table *, int , void *, size_t *, loff_t *);
+int proc_watchdog_cpumask(struct ctl_table *, int, void *, size_t *, loff_t *);
#ifdef CONFIG_HAVE_ACPI_APEI_NMI
#include <asm/nmi.h>