diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c
index d9ee81769899fb8652046857d2fa3eaabd1bacc1..940dfb4065910822d42f3d11c02ba2305f25b02a 100644
--- a/arch/alpha/kernel/ptrace.c
+++ b/arch/alpha/kernel/ptrace.c
@@ -157,14 +157,16 @@ put_reg(struct task_struct *task, unsigned long regno, unsigned long data)
static inline int
read_int(struct task_struct *task, unsigned long addr, int * data)
{
- int copied = access_process_vm(task, addr, data, sizeof(int), 0);
+ int copied = access_process_vm(task, addr, data, sizeof(int),
+ FOLL_FORCE);
return (copied == sizeof(int)) ? 0 : -EIO;
}
static inline int
write_int(struct task_struct *task, unsigned long addr, int data)
{
- int copied = access_process_vm(task, addr, &data, sizeof(int), 1);
+ int copied = access_process_vm(task, addr, &data, sizeof(int),
+ FOLL_FORCE | FOLL_WRITE);
return (copied == sizeof(int)) ? 0 : -EIO;
}
@@ -281,7 +283,8 @@ long arch_ptrace(struct task_struct *child, long request,
/* When I and D space are separate, these will need to be fixed. */
case PTRACE_PEEKTEXT: /* read word at location addr. */
case PTRACE_PEEKDATA:
- copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
+ copied = access_process_vm(child, addr, &tmp, sizeof(tmp),
+ FOLL_FORCE);
ret = -EIO;
if (copied != sizeof(tmp))
break;
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 8b8fe671b1a6dbf347dd4d31a7f272ef87154bcb..8d79286ee4e878044b02c963f5fb3c6deaaafb19 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -271,7 +271,7 @@ long arch_ptrace(struct task_struct *child, long request,
case BFIN_MEM_ACCESS_CORE:
case BFIN_MEM_ACCESS_CORE_ONLY:
copied = access_process_vm(child, addr, &tmp,
- to_copy, 0);
+ to_copy, FOLL_FORCE);
if (copied)
break;
@@ -324,7 +324,8 @@ long arch_ptrace(struct task_struct *child, long request,
case BFIN_MEM_ACCESS_CORE:
case BFIN_MEM_ACCESS_CORE_ONLY:
copied = access_process_vm(child, addr, &data,
- to_copy, 1);
+ to_copy,
+ FOLL_FORCE | FOLL_WRITE);
break;
case BFIN_MEM_ACCESS_DMA:
if (safe_dma_memcpy(paddr, &data, to_copy))
diff --git a/arch/cris/arch-v32/kernel/ptrace.c b/arch/cris/arch-v32/kernel/ptrace.c
index f085229cf870bc306b95df2dee4eadd9ebdd4b8b..f0df654ac6fc5ca53ffd6d6951817e92f492e0be 100644
--- a/arch/cris/arch-v32/kernel/ptrace.c
+++ b/arch/cris/arch-v32/kernel/ptrace.c
@@ -147,7 +147,7 @@ long arch_ptrace(struct task_struct *child, long request,
/* The trampoline page is globally mapped, no page table to traverse.*/
tmp = *(unsigned long*)addr;
} else {
- copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
+ copied = access_process_vm(child, addr, &tmp, sizeof(tmp), FOLL_FORCE);
if (copied != sizeof(tmp))
break;
@@ -279,7 +279,7 @@ static int insn_size(struct task_struct *child, unsigned long pc)
int opsize = 0;
/* Read the opcode at pc (do what PTRACE_PEEKTEXT would do). */
- copied = access_process_vm(child, pc, &opcode, sizeof(opcode), 0);
+ copied = access_process_vm(child, pc, &opcode, sizeof(opcode), FOLL_FORCE);
if (copied != sizeof(opcode))
return 0;
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 6f54d511cc509a03ac079871b6979f03e6b53bc8..31aa8c0f68e14a284e0f2b088afe4c29de7daee5 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -453,7 +453,7 @@ ia64_peek (struct task_struct *child, struct switch_stack *child_stack,
return 0;
}
}
- copied = access_process_vm(child, addr, &ret, sizeof(ret), 0);
+ copied = access_process_vm(child, addr, &ret, sizeof(ret), FOLL_FORCE);
if (copied != sizeof(ret))
return -EIO;
*val = ret;
@@ -489,7 +489,8 @@ ia64_poke (struct task_struct *child, struct switch_stack *child_stack,
*ia64_rse_skip_regs(krbs, regnum) = val;
}
}
- } else if (access_process_vm(child, addr, &val, sizeof(val), 1)
+ } else if (access_process_vm(child, addr, &val, sizeof(val),
+ FOLL_FORCE | FOLL_WRITE)
!= sizeof(val))
return -EIO;
return 0;
@@ -543,7 +544,8 @@ ia64_sync_user_rbs (struct task_struct *child, struct switch_stack *sw,
ret = ia64_peek(child, sw, user_rbs_end, addr, &val);
if (ret < 0)
return ret;
- if (access_process_vm(child, addr, &val, sizeof(val), 1)
+ if (access_process_vm(child, addr, &val, sizeof(val),
+ FOLL_FORCE | FOLL_WRITE)
!= sizeof(val))
return -EIO;
}
@@ -559,7 +561,8 @@ ia64_sync_kernel_rbs (struct task_struct *child, struct switch_stack *sw,
/* now copy word for word from user rbs to kernel rbs: */
for (addr = user_rbs_start; addr < user_rbs_end; addr += 8) {
- if (access_process_vm(child, addr, &val, sizeof(val), 0)
+ if (access_process_vm(child, addr, &val, sizeof(val),
+ FOLL_FORCE)
!= sizeof(val))
return -EIO;
@@ -1156,7 +1159,8 @@ arch_ptrace (struct task_struct *child, long request,
case PTRACE_PEEKTEXT:
case PTRACE_PEEKDATA:
/* read word at location addr */
- if (access_process_vm(child, addr, &data, sizeof(data), 0)
+ if (access_process_vm(child, addr, &data, sizeof(data),
+ FOLL_FORCE)
!= sizeof(data))
return -EIO;
/* ensure return value is not mistaken for error code */
diff --git a/arch/m32r/kernel/ptrace.c b/arch/m32r/kernel/ptrace.c
index 51f5e9aa49016fdce8112eb72083c0b167f21df8..c145605a981ff4fbc441ffe4512a6167147f6bec 100644
--- a/arch/m32r/kernel/ptrace.c
+++ b/arch/m32r/kernel/ptrace.c
@@ -493,7 +493,8 @@ unregister_all_debug_traps(struct task_struct *child)
int i;
for (i = 0; i < p->nr_trap; i++)
- access_process_vm(child, p->addr[i], &p->insn[i], sizeof(p->insn[i]), 1);
+ access_process_vm(child, p->addr[i], &p->insn[i], sizeof(p->insn[i]),
+ FOLL_FORCE | FOLL_WRITE);
p->nr_trap = 0;
}
@@ -537,7 +538,8 @@ embed_debug_trap(struct task_struct *child, unsigned long next_pc)
unsigned long next_insn, code;
unsigned long addr = next_pc & ~3;
- if (access_process_vm(child, addr, &next_insn, sizeof(next_insn), 0)
+ if (access_process_vm(child, addr, &next_insn, sizeof(next_insn),
+ FOLL_FORCE)
!= sizeof(next_insn)) {
return -1; /* error */
}
@@ -546,7 +548,8 @@ embed_debug_trap(struct task_struct *child, unsigned long next_pc)
if (register_debug_trap(child, next_pc, next_insn, &code)) {
return -1; /* error */
}
- if (access_process_vm(child, addr, &code, sizeof(code), 1)
+ if (access_process_vm(child, addr, &code, sizeof(code),
+ FOLL_FORCE | FOLL_WRITE)
!= sizeof(code)) {
return -1; /* error */
}
@@ -562,7 +565,8 @@ withdraw_debug_trap(struct pt_regs *regs)
addr = (regs->bpc - 2) & ~3;
regs->bpc -= 2;
if (unregister_debug_trap(current, addr, &code)) {
- access_process_vm(current, addr, &code, sizeof(code), 1);
+ access_process_vm(current, addr, &code, sizeof(code),
+ FOLL_FORCE | FOLL_WRITE);
invalidate_cache();
}
}
@@ -589,7 +593,8 @@ void user_enable_single_step(struct task_struct *child)
/* Compute next pc. */
pc = get_stack_long(child, PT_BPC);
- if (access_process_vm(child, pc&~3, &insn, sizeof(insn), 0)
+ if (access_process_vm(child, pc&~3, &insn, sizeof(insn),
+ FOLL_FORCE)
!= sizeof(insn))
return;
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index 283b5a1967d1461298bf065b2073d62c6296dc1d..7e71a4e0281ba9cc3c2190dd9a06d958754155fb 100644
--- a/arch/mips/kernel/ptrace32.c
+++ b/arch/mips/kernel/ptrace32.c
@@ -70,7 +70,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
break;
copied = access_process_vm(child, (u64)addrOthers, &tmp,
- sizeof(tmp), 0);
+ sizeof(tmp), FOLL_FORCE);
if (copied != sizeof(tmp))
break;
ret = put_user(tmp, (u32 __user *) (unsigned long) data);
@@ -179,7 +179,8 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
break;
ret = 0;
if (access_process_vm(child, (u64)addrOthers, &data,
- sizeof(data), 1) == sizeof(data))
+ sizeof(data),
+ FOLL_FORCE | FOLL_WRITE) == sizeof(data))
break;
ret = -EIO;
break;
diff --git a/arch/powerpc/kernel/ptrace32.c b/arch/powerpc/kernel/ptrace32.c
index f52b7db327c80a3b603fb2a7179a2f97d6a054be..010b7b310237e4be38ef1d7bcc15a76050fc4469 100644
--- a/arch/powerpc/kernel/ptrace32.c
+++ b/arch/powerpc/kernel/ptrace32.c
@@ -74,7 +74,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
break;
copied = access_process_vm(child, (u64)addrOthers, &tmp,
- sizeof(tmp), 0);
+ sizeof(tmp), FOLL_FORCE);
if (copied != sizeof(tmp))
break;
ret = put_user(tmp, (u32 __user *)data);
@@ -179,7 +179,8 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
break;
ret = 0;
if (access_process_vm(child, (u64)addrOthers, &tmp,
- sizeof(tmp), 1) == sizeof(tmp))
+ sizeof(tmp),
+ FOLL_FORCE | FOLL_WRITE) == sizeof(tmp))
break;
ret = -EIO;
break;
diff --git a/arch/score/kernel/ptrace.c b/arch/score/kernel/ptrace.c
index 55836188b217c170c3141558d843e1d4259bf165..4f7314d5f3347d40a6282976d538ccfb0e4d447d 100644
--- a/arch/score/kernel/ptrace.c
+++ b/arch/score/kernel/ptrace.c
@@ -131,7 +131,7 @@ read_tsk_long(struct task_struct *child,
{
int copied;
- copied = access_process_vm(child, addr, res, sizeof(*res), 0);
+ copied = access_process_vm(child, addr, res, sizeof(*res), FOLL_FORCE);
return copied != sizeof(*res) ? -EIO : 0;
}
@@ -142,7 +142,7 @@ read_tsk_short(struct task_struct *child,
{
int copied;
- copied = access_process_vm(child, addr, res, sizeof(*res), 0);
+ copied = access_process_vm(child, addr, res, sizeof(*res), FOLL_FORCE);
return copied != sizeof(*res) ? -EIO : 0;
}
@@ -153,7 +153,8 @@ write_tsk_short(struct task_struct *child,
{
int copied;
- copied = access_process_vm(child, addr, &val, sizeof(val), 1);
+ copied = access_process_vm(child, addr, &val, sizeof(val),
+ FOLL_FORCE | FOLL_WRITE);
return copied != sizeof(val) ? -EIO : 0;
}
@@ -164,7 +165,8 @@ write_tsk_long(struct task_struct *child,
{
int copied;
- copied = access_process_vm(child, addr, &val, sizeof(val), 1);
+ copied = access_process_vm(child, addr, &val, sizeof(val),
+ FOLL_FORCE | FOLL_WRITE);
return copied != sizeof(val) ? -EIO : 0;
}
diff --git a/arch/sparc/kernel/ptrace_64.c b/arch/sparc/kernel/ptrace_64.c
index 9ddc4928a089b599568331792097c2bc35ea0be8..ac082dd8c67d5a4f1fbf527145b82bd251fbdc8d 100644
--- a/arch/sparc/kernel/ptrace_64.c
+++ b/arch/sparc/kernel/ptrace_64.c
@@ -127,7 +127,8 @@ static int get_from_target(struct task_struct *target, unsigned long uaddr,
if (copy_from_user(kbuf, (void __user *) uaddr, len))
return -EFAULT;
} else {
- int len2 = access_process_vm(target, uaddr, kbuf, len, 0);
+ int len2 = access_process_vm(target, uaddr, kbuf, len,
+ FOLL_FORCE);
if (len2 != len)
return -EFAULT;
}
@@ -141,7 +142,8 @@ static int set_to_target(struct task_struct *target, unsigned long uaddr,
if (copy_to_user((void __user *) uaddr, kbuf, len))
return -EFAULT;
} else {
- int len2 = access_process_vm(target, uaddr, kbuf, len, 1);
+ int len2 = access_process_vm(target, uaddr, kbuf, len,
+ FOLL_FORCE | FOLL_WRITE);
if (len2 != len)
return -EFAULT;
}
@@ -505,7 +507,8 @@ static int genregs32_get(struct task_struct *target,
if (access_process_vm(target,
(unsigned long)
®_window[pos],
- k, sizeof(*k), 0)
+ k, sizeof(*k),
+ FOLL_FORCE)
!= sizeof(*k))
return -EFAULT;
k++;
@@ -531,12 +534,14 @@ static int genregs32_get(struct task_struct *target,
if (access_process_vm(target,
(unsigned long)
®_window[pos],
- ®, sizeof(reg), 0)
+ ®, sizeof(reg),
+ FOLL_FORCE)
!= sizeof(reg))
return -EFAULT;
if (access_process_vm(target,
(unsigned long) u,
- ®, sizeof(reg), 1)
+ ®, sizeof(reg),
+ FOLL_FORCE | FOLL_WRITE)
!= sizeof(reg))
return -EFAULT;
pos++;
@@ -615,7 +620,8 @@ static int genregs32_set(struct task_struct *target,
(unsigned long)
®_window[pos],
(void *) k,
- sizeof(*k), 1)
+ sizeof(*k),
+ FOLL_FORCE | FOLL_WRITE)
!= sizeof(*k))
return -EFAULT;
k++;
@@ -642,13 +648,15 @@ static int genregs32_set(struct task_struct *target,
if (access_process_vm(target,
(unsigned long)
u,
- ®, sizeof(reg), 0)
+ ®, sizeof(reg),
+ FOLL_FORCE)
!= sizeof(reg))
return -EFAULT;
if (access_process_vm(target,
(unsigned long)
®_window[pos],
- ®, sizeof(reg), 1)
+ ®, sizeof(reg),
+ FOLL_FORCE | FOLL_WRITE)
!= sizeof(reg))
return -EFAULT;
pos++;
diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c
index c9a073866ca7b1f4c6efa5b9db110c591083b3af..a23ce84a3f6ccfefe36a0d3070880aa45d2bc0f5 100644
--- a/arch/x86/kernel/step.c
+++ b/arch/x86/kernel/step.c
@@ -57,7 +57,8 @@ static int is_setting_trap_flag(struct task_struct *child, struct pt_regs *regs)
unsigned char opcode[15];
unsigned long addr = convert_ip_to_linear(child, regs);
- copied = access_process_vm(child, addr, opcode, sizeof(opcode), 0);
+ copied = access_process_vm(child, addr, opcode, sizeof(opcode),
+ FOLL_FORCE);
for (i = 0; i < copied; i++) {
switch (opcode[i]) {
/* popf and iret */
diff --git a/arch/x86/um/ptrace_32.c b/arch/x86/um/ptrace_32.c
index 5766ead6fdb9679907c63aa78f8becccc8d9ecff..60a5a5a85505dd25305aea03d0850613e51ee791 100644
--- a/arch/x86/um/ptrace_32.c
+++ b/arch/x86/um/ptrace_32.c
@@ -36,7 +36,8 @@ int is_syscall(unsigned long addr)
* slow, but that doesn't matter, since it will be called only
* in case of singlestepping, if copy_from_user failed.
*/
- n = access_process_vm(current, addr, &instr, sizeof(instr), 0);
+ n = access_process_vm(current, addr, &instr, sizeof(instr),
+ FOLL_FORCE);
if (n != sizeof(instr)) {
printk(KERN_ERR "is_syscall : failed to read "
"instruction from 0x%lx\n", addr);
diff --git a/arch/x86/um/ptrace_64.c b/arch/x86/um/ptrace_64.c
index 0b5c184dd5b3b80894c3db60ead6432ad20dca57..e30202b1716efb4243372d02e61f5f8269203419 100644
--- a/arch/x86/um/ptrace_64.c
+++ b/arch/x86/um/ptrace_64.c
@@ -212,7 +212,8 @@ int is_syscall(unsigned long addr)
* slow, but that doesn't matter, since it will be called only
* in case of singlestepping, if copy_from_user failed.
*/
- n = access_process_vm(current, addr, &instr, sizeof(instr), 0);
+ n = access_process_vm(current, addr, &instr, sizeof(instr),
+ FOLL_FORCE);
if (n != sizeof(instr)) {
printk("is_syscall : failed to read instruction from "
"0x%lx\n", addr);
diff --git a/include/linux/mm.h b/include/linux/mm.h
index f31bf90585875b3790e6e69f768446455cb42d77..ffbd72979ee70fc3a73a2e660fd50f98b3eacc9a 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1266,7 +1266,8 @@ static inline int fixup_user_fault(struct task_struct *tsk,
}
#endif
-extern int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len, int write);
+extern int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len,
+ unsigned int gup_flags);
extern int access_remote_vm(struct mm_struct *mm, unsigned long addr,
void *buf, int len, unsigned int gup_flags);
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 2a99027312a6af6773027e20029752efddc418e3..e6474f7272ec2ce96c95532ea906da113acd5354 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -537,7 +537,7 @@ int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst
int this_len, retval;
this_len = (len > sizeof(buf)) ? sizeof(buf) : len;
- retval = access_process_vm(tsk, src, buf, this_len, 0);
+ retval = access_process_vm(tsk, src, buf, this_len, FOLL_FORCE);
if (!retval) {
if (copied)
break;
@@ -564,7 +564,8 @@ int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long ds
this_len = (len > sizeof(buf)) ? sizeof(buf) : len;
if (copy_from_user(buf, src, this_len))
return -EFAULT;
- retval = access_process_vm(tsk, dst, buf, this_len, 1);
+ retval = access_process_vm(tsk, dst, buf, this_len,
+ FOLL_FORCE | FOLL_WRITE);
if (!retval) {
if (copied)
break;
@@ -1127,7 +1128,7 @@ int generic_ptrace_peekdata(struct task_struct *tsk, unsigned long addr,
unsigned long tmp;
int copied;
- copied = access_process_vm(tsk, addr, &tmp, sizeof(tmp), 0);
+ copied = access_process_vm(tsk, addr, &tmp, sizeof(tmp), FOLL_FORCE);
if (copied != sizeof(tmp))
return -EIO;
return put_user(tmp, (unsigned long __user *)data);
@@ -1138,7 +1139,8 @@ int generic_ptrace_pokedata(struct task_struct *tsk, unsigned long addr,
{
int copied;
- copied = access_process_vm(tsk, addr, &data, sizeof(data), 1);
+ copied = access_process_vm(tsk, addr, &data, sizeof(data),
+ FOLL_FORCE | FOLL_WRITE);
return (copied == sizeof(data)) ? 0 : -EIO;
}
@@ -1155,7 +1157,8 @@ int compat_ptrace_request(struct task_struct *child, compat_long_t request,
switch (request) {
case PTRACE_PEEKTEXT:
case PTRACE_PEEKDATA:
- ret = access_process_vm(child, addr, &word, sizeof(word), 0);
+ ret = access_process_vm(child, addr, &word, sizeof(word),
+ FOLL_FORCE);
if (ret != sizeof(word))
ret = -EIO;
else
@@ -1164,7 +1167,8 @@ int compat_ptrace_request(struct task_struct *child, compat_long_t request,
case PTRACE_POKETEXT:
case PTRACE_POKEDATA:
- ret = access_process_vm(child, addr, &data, sizeof(data), 1);
+ ret = access_process_vm(child, addr, &data, sizeof(data),
+ FOLL_FORCE | FOLL_WRITE);
ret = (ret != sizeof(data) ? -EIO : 0);
break;
diff --git a/mm/memory.c b/mm/memory.c
index bac2d994850ecc4e3d7ba8e91dbd4e8479b4670f..e18c57bdc75c4c96e3ef79546afe11fab5a3c07a 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3951,20 +3951,16 @@ int access_remote_vm(struct mm_struct *mm, unsigned long addr,
* Do not walk the page table directly, use get_user_pages
*/
int access_process_vm(struct task_struct *tsk, unsigned long addr,
- void *buf, int len, int write)
+ void *buf, int len, unsigned int gup_flags)
{
struct mm_struct *mm;
int ret;
- unsigned int flags = FOLL_FORCE;
mm = get_task_mm(tsk);
if (!mm)
return 0;
- if (write)
- flags |= FOLL_WRITE;
-
- ret = __access_remote_vm(tsk, mm, addr, buf, len, flags);
+ ret = __access_remote_vm(tsk, mm, addr, buf, len, gup_flags);
mmput(mm);
diff --git a/mm/nommu.c b/mm/nommu.c
index 93d5bb53fc63905f857b5c21286a8898d3b2580f..db5fd1795298764d06abc9a6fdbc1657cc3dcd2b 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1861,7 +1861,8 @@ int access_remote_vm(struct mm_struct *mm, unsigned long addr,
* Access another process' address space.
* - source/target buffer must be kernel space
*/
-int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len, int write)
+int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len,
+ unsigned int gup_flags)
{
struct mm_struct *mm;
@@ -1872,8 +1873,7 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in
if (!mm)
return 0;
- len = __access_remote_vm(tsk, mm, addr, buf, len,
- write ? FOLL_WRITE : 0);
+ len = __access_remote_vm(tsk, mm, addr, buf, len, gup_flags);
mmput(mm);
return len;
diff --git a/mm/util.c b/mm/util.c
index 4c685bde5ebc00887c25a1c008f880c10fc471e3..952cbe7ad7b75183d54df0925826f892f5e4f536 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -624,7 +624,7 @@ int get_cmdline(struct task_struct *task, char *buffer, int buflen)
if (len > buflen)
len = buflen;
- res = access_process_vm(task, arg_start, buffer, len, 0);
+ res = access_process_vm(task, arg_start, buffer, len, FOLL_FORCE);
/*
* If the nul at the end of args has been overwritten, then
@@ -639,7 +639,8 @@ int get_cmdline(struct task_struct *task, char *buffer, int buflen)
if (len > buflen - res)
len = buflen - res;
res += access_process_vm(task, env_start,
- buffer+res, len, 0);
+ buffer+res, len,
+ FOLL_FORCE);
res = strnlen(buffer, res);
}
}