The commit is pushed to "branch-rh9-5.14.0-427.44.1.vz9.80.x-ovz" and will
appear at [email protected]:openvz/vzkernel.git
after rh9-5.14.0-427.44.1.vz9.80.17
------>
commit 00d0a1384a4ed7ad099043a0ca3908a9c561d310
Author: Alexey Kuznetsov <[email protected]>
Date: Fri Feb 21 00:56:10 2025 +0800
fs/ext4: bug in swapext ioctl
Stupid and very dangerous mistake. Plain luck it did not result
in corruptions, was exposed as failure to convert csd journal
from old to new format.
Fixes: 6380f9df0f67 ("fs/ext4: swapext ioctl")
Affects: #VSTOR-100610
https://virtuozzo.atlassian.net/browse/VSTOR-100610
Signed-off-by: Alexey Kuznetsov <[email protected]>
Feature: ext4: swapext ioctl: swap range of blocks between two files
---
fs/ext4/move_extent.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index aa9b6329e4af..9210fbd86d5e 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -941,7 +941,7 @@ ext4_ioc_swap_extents(struct file *o_filp, struct file
*d_filp, __u64 orig_blk,
goto out;
}
if (cur_blk < d_start) {
- cur_len -= cur_blk - d_start;
+ cur_len -= d_start - cur_blk;
cur_blk = d_start;
}
if (cur_blk + cur_len > d_end)
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