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mm: remove compat_process_vm_{readv,writev}

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Now that import_iovec handles compat iovecs, the native syscalls
can be used for the compat case as well.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2020-09-25 06:51:45 +02:00 committed by Al Viro
parent 598b3cec83
commit c3973b401e
17 changed files with 30 additions and 109 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm64/include/asm/unistd32.h
View File

@ -763,9 +763,9 @@ __SYSCALL(__NR_sendmmsg, compat_sys_sendmmsg)
#define __NR_setns 375
__SYSCALL(__NR_setns, sys_setns)
#define __NR_process_vm_readv 376
__SYSCALL(__NR_process_vm_readv, compat_sys_process_vm_readv)
__SYSCALL(__NR_process_vm_readv, sys_process_vm_readv)
#define __NR_process_vm_writev 377
__SYSCALL(__NR_process_vm_writev, compat_sys_process_vm_writev)
__SYSCALL(__NR_process_vm_writev, sys_process_vm_writev)
#define __NR_kcmp 378
__SYSCALL(__NR_kcmp, sys_kcmp)
#define __NR_finit_module 379

4
arch/mips/kernel/syscalls/syscall_n32.tbl
View File

@ -317,8 +317,8 @@
306 n32 syncfs sys_syncfs
307 n32 sendmmsg compat_sys_sendmmsg
308 n32 setns sys_setns
309 n32 process_vm_readv compat_sys_process_vm_readv
310 n32 process_vm_writev compat_sys_process_vm_writev
309 n32 process_vm_readv sys_process_vm_readv
310 n32 process_vm_writev sys_process_vm_writev
311 n32 kcmp sys_kcmp
312 n32 finit_module sys_finit_module
313 n32 sched_setattr sys_sched_setattr

4
arch/mips/kernel/syscalls/syscall_o32.tbl
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@ -356,8 +356,8 @@
342 o32 syncfs sys_syncfs
343 o32 sendmmsg sys_sendmmsg compat_sys_sendmmsg
344 o32 setns sys_setns
345 o32 process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv
346 o32 process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev
345 o32 process_vm_readv sys_process_vm_readv
346 o32 process_vm_writev sys_process_vm_writev
347 o32 kcmp sys_kcmp
348 o32 finit_module sys_finit_module
349 o32 sched_setattr sys_sched_setattr

4
arch/parisc/kernel/syscalls/syscall.tbl
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@ -372,8 +372,8 @@
327 common syncfs sys_syncfs
328 common setns sys_setns
329 common sendmmsg sys_sendmmsg compat_sys_sendmmsg
330 common process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv
331 common process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev
330 common process_vm_readv sys_process_vm_readv
331 common process_vm_writev sys_process_vm_writev
332 common kcmp sys_kcmp
333 common finit_module sys_finit_module
334 common sched_setattr sys_sched_setattr

4
arch/powerpc/kernel/syscalls/syscall.tbl
View File

@ -449,8 +449,8 @@
348 common syncfs sys_syncfs
349 common sendmmsg sys_sendmmsg compat_sys_sendmmsg
350 common setns sys_setns
351 nospu process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv
352 nospu process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev
351 nospu process_vm_readv sys_process_vm_readv
352 nospu process_vm_writev sys_process_vm_writev
353 nospu finit_module sys_finit_module
354 nospu kcmp sys_kcmp
355 common sched_setattr sys_sched_setattr

4
arch/s390/kernel/syscalls/syscall.tbl
View File

@ -347,8 +347,8 @@
337 common clock_adjtime sys_clock_adjtime sys_clock_adjtime32
338 common syncfs sys_syncfs sys_syncfs
339 common setns sys_setns sys_setns
340 common process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv
341 common process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev
340 common process_vm_readv sys_process_vm_readv sys_process_vm_readv
341 common process_vm_writev sys_process_vm_writev sys_process_vm_writev
342 common s390_runtime_instr sys_s390_runtime_instr sys_s390_runtime_instr
343 common kcmp sys_kcmp sys_kcmp
344 common finit_module sys_finit_module sys_finit_module

4
arch/sparc/kernel/syscalls/syscall.tbl
View File

@ -406,8 +406,8 @@
335 common syncfs sys_syncfs
336 common sendmmsg sys_sendmmsg compat_sys_sendmmsg
337 common setns sys_setns
338 common process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv
339 common process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev
338 common process_vm_readv sys_process_vm_readv
339 common process_vm_writev sys_process_vm_writev
340 32 kern_features sys_ni_syscall sys_kern_features
340 64 kern_features sys_kern_features
341 common kcmp sys_kcmp

2
arch/x86/entry/syscall_x32.c
View File

@ -17,6 +17,8 @@
#define __x32_sys_getsockopt __x64_sys_getsockopt
#define __x32_sys_setsockopt __x64_sys_setsockopt
#define __x32_sys_vmsplice __x64_sys_vmsplice
#define __x32_sys_process_vm_readv __x64_sys_process_vm_readv
#define __x32_sys_process_vm_writev __x64_sys_process_vm_writev
#define __SYSCALL_64(nr, sym)

4
arch/x86/entry/syscalls/syscall_32.tbl
View File

@ -358,8 +358,8 @@
344 i386 syncfs sys_syncfs
345 i386 sendmmsg sys_sendmmsg compat_sys_sendmmsg
346 i386 setns sys_setns
347 i386 process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv
348 i386 process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev
347 i386 process_vm_readv sys_process_vm_readv
348 i386 process_vm_writev sys_process_vm_writev
349 i386 kcmp sys_kcmp
350 i386 finit_module sys_finit_module
351 i386 sched_setattr sys_sched_setattr

4
arch/x86/entry/syscalls/syscall_64.tbl
View File

@ -395,8 +395,8 @@
536 x32 rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo
537 x32 recvmmsg compat_sys_recvmmsg_time64
538 x32 sendmmsg compat_sys_sendmmsg
539 x32 process_vm_readv compat_sys_process_vm_readv
540 x32 process_vm_writev compat_sys_process_vm_writev
539 x32 process_vm_readv sys_process_vm_readv
540 x32 process_vm_writev sys_process_vm_writev
541 x32 setsockopt sys_setsockopt
542 x32 getsockopt sys_getsockopt
543 x32 io_setup compat_sys_io_setup

8
include/linux/compat.h
View File

@ -780,14 +780,6 @@ asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
int flags);
asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
unsigned vlen, unsigned int flags);
asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
const struct compat_iovec __user *lvec,
compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
compat_ulong_t riovcnt, compat_ulong_t flags);
asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
const struct compat_iovec __user *lvec,
compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
compat_ulong_t riovcnt, compat_ulong_t flags);
asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
const compat_uptr_t __user *argv,
const compat_uptr_t __user *envp, int flags);

6
include/uapi/asm-generic/unistd.h
View File

@ -727,11 +727,9 @@ __SYSCALL(__NR_setns, sys_setns)
#define __NR_sendmmsg 269
__SC_COMP(__NR_sendmmsg, sys_sendmmsg, compat_sys_sendmmsg)
#define __NR_process_vm_readv 270
__SC_COMP(__NR_process_vm_readv, sys_process_vm_readv, \
compat_sys_process_vm_readv)
__SYSCALL(__NR_process_vm_readv, sys_process_vm_readv)
#define __NR_process_vm_writev 271
__SC_COMP(__NR_process_vm_writev, sys_process_vm_writev, \
compat_sys_process_vm_writev)
__SYSCALL(__NR_process_vm_writev, sys_process_vm_writev)
#define __NR_kcmp 272
__SYSCALL(__NR_kcmp, sys_kcmp)
#define __NR_finit_module 273

69
mm/process_vm_access.c
View File

@ -14,10 +14,6 @@
#include <linux/slab.h>
#include <linux/syscalls.h>
#ifdef CONFIG_COMPAT
#include <linux/compat.h>
#endif
/**
* process_vm_rw_pages - read/write pages from task specified
* @pages: array of pointers to pages we want to copy
@ -304,68 +300,3 @@ SYSCALL_DEFINE6(process_vm_writev, pid_t, pid,
{
return process_vm_rw(pid, lvec, liovcnt, rvec, riovcnt, flags, 1);
}
#ifdef CONFIG_COMPAT
static ssize_t
compat_process_vm_rw(compat_pid_t pid,
const struct compat_iovec __user *lvec,
unsigned long liovcnt,
const struct compat_iovec __user *rvec,
unsigned long riovcnt,
unsigned long flags, int vm_write)
{
struct iovec iovstack_l[UIO_FASTIOV];
struct iovec iovstack_r[UIO_FASTIOV];
struct iovec *iov_l = iovstack_l;
struct iovec *iov_r = iovstack_r;
struct iov_iter iter;
ssize_t rc = -EFAULT;
int dir = vm_write ? WRITE : READ;
if (flags != 0)
return -EINVAL;
rc = import_iovec(dir, (const struct iovec __user *)lvec, liovcnt,
UIO_FASTIOV, &iov_l, &iter);
if (rc < 0)
return rc;
if (!iov_iter_count(&iter))
goto free_iov_l;
iov_r = iovec_from_user((const struct iovec __user *)rvec, riovcnt,
UIO_FASTIOV, iovstack_r, true);
if (IS_ERR(iov_r)) {
rc = PTR_ERR(iov_r);
goto free_iov_l;
}
rc = process_vm_rw_core(pid, &iter, iov_r, riovcnt, flags, vm_write);
if (iov_r != iovstack_r)
kfree(iov_r);
free_iov_l:
kfree(iov_l);
return rc;
}
COMPAT_SYSCALL_DEFINE6(process_vm_readv, compat_pid_t, pid,
const struct compat_iovec __user *, lvec,
compat_ulong_t, liovcnt,
const struct compat_iovec __user *, rvec,
compat_ulong_t, riovcnt,
compat_ulong_t, flags)
{
return compat_process_vm_rw(pid, lvec, liovcnt, rvec,
riovcnt, flags, 0);
}
COMPAT_SYSCALL_DEFINE6(process_vm_writev, compat_pid_t, pid,
const struct compat_iovec __user *, lvec,
compat_ulong_t, liovcnt,
const struct compat_iovec __user *, rvec,
compat_ulong_t, riovcnt,
compat_ulong_t, flags)
{
return compat_process_vm_rw(pid, lvec, liovcnt, rvec,
riovcnt, flags, 1);
}
#endif

6
tools/include/uapi/asm-generic/unistd.h
View File

@ -727,11 +727,9 @@ __SYSCALL(__NR_setns, sys_setns)
#define __NR_sendmmsg 269
__SC_COMP(__NR_sendmmsg, sys_sendmmsg, compat_sys_sendmmsg)
#define __NR_process_vm_readv 270
__SC_COMP(__NR_process_vm_readv, sys_process_vm_readv, \
compat_sys_process_vm_readv)
__SYSCALL(__NR_process_vm_readv, sys_process_vm_readv)
#define __NR_process_vm_writev 271
__SC_COMP(__NR_process_vm_writev, sys_process_vm_writev, \
compat_sys_process_vm_writev)
__SYSCALL(__NR_process_vm_writev, sys_process_vm_writev)
#define __NR_kcmp 272
__SYSCALL(__NR_kcmp, sys_kcmp)
#define __NR_finit_module 273

4
tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
View File

@ -443,8 +443,8 @@
348 common syncfs sys_syncfs
349 common sendmmsg sys_sendmmsg compat_sys_sendmmsg
350 common setns sys_setns
351 nospu process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv
352 nospu process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev
351 nospu process_vm_readv sys_process_vm_readv
352 nospu process_vm_writev sys_process_vm_writev
353 nospu finit_module sys_finit_module
354 nospu kcmp sys_kcmp
355 common sched_setattr sys_sched_setattr

4
tools/perf/arch/s390/entry/syscalls/syscall.tbl
View File

@ -347,8 +347,8 @@
337 common clock_adjtime sys_clock_adjtime compat_sys_clock_adjtime
338 common syncfs sys_syncfs sys_syncfs
339 common setns sys_setns sys_setns
340 common process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv
341 common process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev
340 common process_vm_readv sys_process_vm_readv sys_process_vm_readv
341 common process_vm_writev sys_process_vm_writev sys_process_vm_writev
342 common s390_runtime_instr sys_s390_runtime_instr sys_s390_runtime_instr
343 common kcmp sys_kcmp compat_sys_kcmp
344 common finit_module sys_finit_module compat_sys_finit_module

4
tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
View File

@ -395,8 +395,8 @@
536 x32 rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo
537 x32 recvmmsg compat_sys_recvmmsg_time64
538 x32 sendmmsg compat_sys_sendmmsg
539 x32 process_vm_readv compat_sys_process_vm_readv
540 x32 process_vm_writev compat_sys_process_vm_writev
539 x32 process_vm_readv sys_process_vm_readv
540 x32 process_vm_writev sys_process_vm_writev
541 x32 setsockopt sys_setsockopt
542 x32 getsockopt sys_getsockopt
543 x32 io_setup compat_sys_io_setup