procfs: fix some wrong error code usage

[root@wei 1]# cat /proc/1/mem
cat: /proc/1/mem: No such process

error code -ESRCH is wrong in this situation.  Return -EPERM instead.

Signed-off-by: Jovi Zhang <[email protected]>
Reviewed-by: KOSAKI Motohiro <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: Al Viro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Jovi Zhang 2011-03-23 16:42:51 -07:00 • committed by Linus Torvalds
commit fc3d8767b2

View file

@ -775,7 +775,8 @@ static ssize_t mem_read(struct file * file, char __user * buf,
if (!task)
goto out_no_task;
if (check_mem_permission(task))
ret = check_mem_permission(task);
if (ret)
goto out;
ret = -ENOMEM;
@ -845,7 +846,8 @@ static ssize_t mem_write(struct file * file, const char __user *buf,
if (!task)
goto out_no_task;
if (check_mem_permission(task))
copied = check_mem_permission(task);
if (copied)
goto out;
copied = -ENOMEM;
@ -917,6 +919,7 @@ static ssize_t environ_read(struct file *file, char __user *buf,
if (!task)
goto out_no_task;
ret = -EPERM;
if (!ptrace_may_access(task, PTRACE_MODE_READ))
goto out;