linux-ext4 - [PATCH 1/3] ext4: Allow punch hole beyond i

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

Date:	Sat, 14 Jan 2012 12:34:59 -0700
From:	Allison Henderson <achender@...ux.vnet.ibm.com>
To:	linux-ext4@...r.kernel.org
Cc:	Allison Henderson <achender@...ux.vnet.ibm.com>
Subject: [PATCH 1/3] ext4: Allow punch hole beyond i_size

This patch allows blocks beyond i_size to be punched out.
This early return to catch this condition is simply removed
allowing punch hole to proceed beyond i_size.

Signed-off-by: Allison Henderson <achender@...ux.vnet.ibm.com>
---
:100644 100644 ad39627... 9ec6249... M	fs/ext4/extents.c
 fs/ext4/extents.c |   14 --------------
 1 files changed, 0 insertions(+), 14 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index ad39627..9ec6249 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4704,20 +4704,6 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length)
 	loff_t first_page_offset, last_page_offset;
 	int ret, credits, blocks_released, err = 0;
 
-	/* No need to punch hole beyond i_size */
-	if (offset >= inode->i_size)
-		return 0;
-
-	/*
-	 * If the hole extends beyond i_size, set the hole
-	 * to end after the page that contains i_size
-	 */
-	if (offset + length > inode->i_size) {
-		length = inode->i_size +
-		   PAGE_CACHE_SIZE - (inode->i_size & (PAGE_CACHE_SIZE - 1)) -
-		   offset;
-	}
-
 	first_block = (offset + sb->s_blocksize - 1) >>
 		EXT4_BLOCK_SIZE_BITS(sb);
 	last_block = (offset + length) >> EXT4_BLOCK_SIZE_BITS(sb);
-- 
1.7.1

--
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