brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-06-09 23:36:03 +09:00
Code Issues Projects Releases Wiki Activity

ext4: Fix memory leak of journal buffer if block is updated multiple times

Browse Source 
If the same block is updated multiple times in a row during a single
file system operation, gd_index is decremented to use the same journal
entry again. Avoid loosing the already allocated buffer.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
This commit is contained in:
Stefan Brüns 2016-09-06 04:36:56 +02:00 committed by Tom Rini
parent de9e831675
commit b1edcf0d80
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
fs/ext4/ext4_journal.c
View File

@ -190,7 +190,11 @@ int ext4fs_put_metadata(char *metadata_buffer, uint32_t blknr)
printf("Invalid input arguments %s\n", __func__);
return -EINVAL;
}
dirty_block_ptr[gd_index]->buf = zalloc(fs->blksz);
if (dirty_block_ptr[gd_index]->buf)
assert(dirty_block_ptr[gd_index]->blknr == blknr);
else
dirty_block_ptr[gd_index]->buf = zalloc(fs->blksz);
if (!dirty_block_ptr[gd_index]->buf)
return -ENOMEM;
memcpy(dirty_block_ptr[gd_index]->buf, metadata_buffer, fs->blksz);