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Revert "iov_iter: refactor rw_copy_check_uvector and import_iovec"

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This reverts commit bfdc59701d.

Bug: 171539436
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ibf840a8fb38cb7d5888fb1bb1313647edf0b336e
This commit is contained in:
Greg Kroah-Hartman
2020-10-23 10:20:58 +02:00
parent 836219141f
commit d59c65253c
5 changed files with 236 additions and 147 deletions
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16
include/linux/compat.h
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@@ -91,11 +91,6 @@
static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
#endif /* COMPAT_SYSCALL_DEFINEx */
struct compat_iovec {
compat_uptr_t iov_base;
compat_size_t iov_len;
};
#ifdef CONFIG_COMPAT
#ifndef compat_user_stack_pointer
@@ -253,6 +248,11 @@ typedef struct compat_siginfo {
} _sifields;
} compat_siginfo_t;
struct compat_iovec {
compat_uptr_t iov_base;
compat_size_t iov_len;
};
struct compat_rlimit {
compat_ulong_t rlim_cur;
compat_ulong_t rlim_max;
@@ -451,6 +451,12 @@ extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
struct epoll_event; /* fortunately, this one is fixed-layout */
extern ssize_t compat_rw_copy_check_uvector(int type,
const struct compat_iovec __user *uvector,
unsigned long nr_segs,
unsigned long fast_segs, struct iovec *fast_pointer,
struct iovec **ret_pointer);
extern void __user *compat_alloc_user_space(unsigned long len);
int compat_restore_altstack(const compat_stack_t __user *uss);