From fc3d8767b2b6de955579852d7a150f1734265eaf Mon Sep 17 00:00:00 2001 From: Jovi Zhang Date: Wed, 23 Mar 2011 16:42:51 -0700 Subject: 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 Reviewed-by: KOSAKI Motohiro Cc: Alexey Dobriyan Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/proc/base.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/fs/proc/base.c b/fs/proc/base.c index c3af15e9c07..daba1365325 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -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; -- cgit v1.2.3