This patch strengthens file permissions of pid record in proc filesystem. When
pid and pidentry records created, his permissions strengthens by creator umask.
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---
--- linux-3.7/fs/proc/base.c.orig 2012-12-11 06:30:57.000000000 +0300
+++ linux-3.7/fs/proc/base.c 2012-12-13 16:48:59.000000000 +0300
@@ -2035,6 +2035,7 @@ static struct dentry *proc_pident_instan
ei = PROC_I(inode);
inode->i_mode = p->mode;
+ inode->i_mode &= ~(mode_t) get_current()->fs->umask;
if (S_ISDIR(inode->i_mode))
set_nlink(inode, 2); /* Use getattr to fix if necessary */
if (p->iop)
@@ -2856,7 +2857,8 @@ static struct dentry *proc_pid_instantia
if (!inode)
goto out;
- inode->i_mode = S_IFDIR|S_IRUGO|S_IXUGO;
+ inode->i_mode = S_IFDIR|S_IRUGO|S_IWUSR|S_IXUGO;
+ inode->i_mode &= ~(mode_t) get_current()->fs->umask;
inode->i_op = &proc_tgid_base_inode_operations;
inode->i_fop = &proc_tgid_base_operations;
inode->i_flags|=S_IMMUTABLE;
---
--
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