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Message-Id: <20141112011006.183508076@linuxfoundation.org>
Date: Wed, 12 Nov 2014 10:13:40 +0900
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Valdis Kletnieks <valdis.kletnieks@...edu>,
Kees Cook <keescook@...omium.org>,
Tony Luck <tony.luck@...el.com>
Subject: [PATCH 3.17 082/319] pstore: Fix duplicate {console,ftrace}-efi entries
3.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Valdis Kletnieks <Valdis.Kletnieks@...edu>
commit d4bf205da618bbd0b038e404d646f14e76915718 upstream.
The pstore filesystem still creates duplicate filename/inode pairs for
some pstore types. Add the id to the filename to prevent that.
Before patch:
[/sys/fs/pstore] ls -li
total 0
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
1250 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi
After:
[/sys/fs/pstore] ls -li
total 0
1232 -r--r--r--. 1 root root 148 Sep 29 17:09 console-efi-141202499100000
1231 -r--r--r--. 1 root root 67 Sep 29 17:09 console-efi-141202499200000
1230 -r--r--r--. 1 root root 148 Sep 29 17:44 console-efi-141202705400000
1229 -r--r--r--. 1 root root 67 Sep 29 17:44 console-efi-141202705500000
1228 -r--r--r--. 1 root root 67 Sep 29 20:42 console-efi-141203772600000
1227 -r--r--r--. 1 root root 148 Sep 29 23:42 console-efi-141204854900000
1226 -r--r--r--. 1 root root 67 Sep 29 23:42 console-efi-141204855000000
1225 -r--r--r--. 1 root root 148 Sep 29 23:59 console-efi-141204954200000
1224 -r--r--r--. 1 root root 67 Sep 29 23:59 console-efi-141204954400000
Signed-off-by: Valdis Kletnieks <valdis.kletnieks@...edu>
Acked-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Tony Luck <tony.luck@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
fs/pstore/inode.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -320,10 +320,10 @@ int pstore_mkfile(enum pstore_type_id ty
compressed ? ".enc.z" : "");
break;
case PSTORE_TYPE_CONSOLE:
- sprintf(name, "console-%s", psname);
+ sprintf(name, "console-%s-%lld", psname, id);
break;
case PSTORE_TYPE_FTRACE:
- sprintf(name, "ftrace-%s", psname);
+ sprintf(name, "ftrace-%s-%lld", psname, id);
break;
case PSTORE_TYPE_MCE:
sprintf(name, "mce-%s-%lld", psname, id);
--
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