linux-ext4 - [PATCH] fix mballoc oopses on mkdir

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <46D39776.2090103@redhat.com>
Date:	Mon, 27 Aug 2007 22:33:10 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	ext4 development <linux-ext4@...r.kernel.org>
Subject: [PATCH] fix mballoc oopses on mkdir

Tried out Ted's git tree + all pending patches today, and 
immediately oopsed on a mkdir thanks to this in 
ext4_mb_new_group_pa()

	BUG_ON(!S_ISREG(ac->ac_inode->i_mode));

(there are 54 BUGs and BUG_ONs in this file...!)

I think something like this patch is needed?

Signed-off-by: Eric Sandeen <sandeen@...hat.com>

Index: ext4.git/fs/ext4/extents.c
===================================================================
--- ext4.git.orig/fs/ext4/extents.c
+++ ext4.git/fs/ext4/extents.c
@@ -2535,7 +2537,8 @@ int ext4_ext_get_blocks(handle_t *handle
 	ar.goal = ext4_ext_find_goal(inode, path, iblock);
 	ar.logical = iblock;
 	ar.len = allocated;
-	ar.flags = EXT4_MB_HINT_DATA;
+	if (S_ISREG(inode->i_mode))
+		ar.flags = EXT4_MB_HINT_DATA;
 	newblock = ext4_mb_new_blocks(handle, &ar, &err);
 	if (!newblock)
 		goto out2;

-
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html