linux-kernel - [PATCH v5 2/5] fs: proc: Delete inode time initializations in proc_alloc

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Message-Id: <1473864486-30862-3-git-send-email-deepa.kernel@gmail.com>
Date:   Wed, 14 Sep 2016 07:48:03 -0700
From:   Deepa Dinamani <deepa.kernel@...il.com>
To:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     arnd@...db.de, tglx@...utronix.de, torvalds@...ux-foundation.org,
        gregkh@...uxfoundation.org, akpm@...ux-foundation.org,
        tytso@....edu, viro@...iv.linux.org.uk, y2038@...ts.linaro.org
Subject: [PATCH v5 2/5] fs: proc: Delete inode time initializations in proc_alloc_inode()

proc uses new_inode_pseudo() to allocate a new inode.
This in turn calls the proc_inode_alloc() callback.
But, at this point, inode is still not initialized
with the super_block pointer which only happens just
before alloc_inode() returns after the call to
inode_init_always().

Also, the inode times are initialized again after the
call to new_inode_pseudo() in proc_inode_alloc().
The assignemet in proc_alloc_inode() is redundant and
also doesn't work after the current_time() api is
changed to take struct inode* instead of
struct *super_block.

This bug was reported after current_time() was used to
assign times in proc_alloc_inode().

Signed-off-by: Deepa Dinamani <deepa.kernel@...il.com>
Reported-by: Fengguang Wu <fengguang.wu@...el.com> [0-day test robot]
Reviewed-by: Arnd Bergmann <arnd@...db.de>
---
 fs/proc/inode.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index c1b7238..ce1f1a9 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -68,7 +68,6 @@ static struct inode *proc_alloc_inode(struct super_block *sb)
 	ei->sysctl_entry = NULL;
 	ei->ns_ops = NULL;
 	inode = &ei->vfs_inode;
-	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 	return inode;
 }

-- 
2.7.4