Hi,
This is for Red Hat Bugzilla:
https://bugzilla.redhat.com/show_bug.cgi?id=641926
It is possible that e4defrag causes a segfault when someone removes
a defragging file. The following patch fixes this problem.
How to make the newest e4defrag:
1. Download e2fsprogs git tree
# git pull http://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git
2. Apply the patch I sent a while ago
http://marc.info/?l=linux-ext4&m=128272690010784&w=4
3. Apply the attached patch
Regards,
Kazuya Mio
Reported-by: Michal Piotrowski <[email protected]>
Signed-off-by: Kazuya Mio <[email protected]>
---
misc/e4defrag.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/misc/e4defrag.c b/misc/e4defrag.c
index db92e1c..eb3269a 100644
--- a/misc/e4defrag.c
+++ b/misc/e4defrag.c
@@ -936,7 +936,7 @@ static int get_file_extents(int fd, struct fiemap_extent_list **ext_list_head)
fiemap_buf->fm_start = pos;
memset(ext_buf, 0, ext_buf_size);
ret = ioctl(fd, FS_IOC_FIEMAP, fiemap_buf);
- if (ret < 0)
+ if (ret < 0 || fiemap_buf->fm_mapped_extents == 0)
goto out;
for (i = 0; i < fiemap_buf->fm_mapped_extents; i++) {
ext_list = NULL;