2.6.32-longterm review patch. If anyone has any objections, please let me know.
------------------
From: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Fix failure paths in ext4_fill_super() that can lead to a null
dereference. This was designated CVE-2015-8324.
Mostly extracted from commit 744692dc0598 ("ext4: use
ext4_get_block_write in buffer write").
However there's one more incorrect goto to fix, removed upstream in
commit cf40db137cc2 ("ext4: remove failed journal checksum check").
Reference: https://bugs.openvz.org/browse/OVZ-6541
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Signed-off-by: Willy Tarreau <w@xxxxxx>
---
fs/ext4/super.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 045e7bf..8ec8e1f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2767,14 +2767,14 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
ext4_commit_super(sb, 1);
- goto failed_mount4;
+ goto failed_mount_wq;
}
}
} else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) &&
EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) {
ext4_msg(sb, KERN_ERR, "required journal recovery "
"suppressed and not mounted read-only");
- goto failed_mount4;
+ goto failed_mount_wq;
} else {
clear_opt(sbi->s_mount_opt, DATA_FLAGS);
set_opt(sbi->s_mount_opt, WRITEBACK_DATA);
@@ -2787,7 +2787,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
!jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,
JBD2_FEATURE_INCOMPAT_64BIT)) {
ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature");
- goto failed_mount4;
+ goto failed_mount_wq;
}
if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
@@ -2826,7 +2826,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
(sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {
ext4_msg(sb, KERN_ERR, "Journal does not support "
"requested data journaling mode");
- goto failed_mount4;
+ goto failed_mount_wq;
}
default:
break;
--
1.7.12.2.21.g234cd45.dirty
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