diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-04-24 08:43:38 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-04-27 02:07:40 -0400 |
| commit | 32927393dc1ccd60fb2bdc05b9e8e88753761469 (patch) | |
| tree | c488a5564cdde7594c953219a98e22fb4865c812 /arch/arm64 | |
| parent | f461d2dcd511c020a26d4d791fae595c65ed09b6 (diff) | |
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 'arch/arm64')
| -rw-r--r-- | arch/arm64/kernel/armv8_deprecated.c | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/fpsimd.c | 3 |
2 files changed, 2 insertions, 3 deletions
diff --git a/arch/arm64/kernel/armv8_deprecated.c b/arch/arm64/kernel/armv8_deprecated.c index c19aa81ddc8c..7364de008bab 100644 --- a/arch/arm64/kernel/armv8_deprecated.c +++ b/arch/arm64/kernel/armv8_deprecated.c @@ -203,7 +203,7 @@ static void __init register_insn_emulation(struct insn_emulation_ops *ops) } static int emulation_proc_handler(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, + void *buffer, size_t *lenp, loff_t *ppos) { int ret = 0; diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index 94289d126993..35cb5e66c504 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -341,8 +341,7 @@ static unsigned int find_supported_vector_length(unsigned int vl) #ifdef CONFIG_SYSCTL static int sve_proc_do_default_vl(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; int vl = sve_default_vl; |