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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2021-08-11 19:39:19 +0200 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2021-08-11 19:41:17 +0200 |
| commit | a441cb616db547d366a796d0370d5f351b73b289 (patch) | |
| tree | 3f013602a45752e339b9aa27d8669db5685d54b2 /ext2fs | |
| parent | 2cfbdcc66886bd4852f9e84b46fbf6bdc7d8a13e (diff) | |
| download | hurd-a441cb616db547d366a796d0370d5f351b73b289.tar.gz hurd-a441cb616db547d366a796d0370d5f351b73b289.tar.bz2 hurd-a441cb616db547d366a796d0370d5f351b73b289.zip | |
ext2fs: clear inline data
When truncating a node with inline data, it's safer to really frob the inline
data, to make sure ext2fs does not wrongly interprete it as block numbers.
Diffstat (limited to 'ext2fs')
| -rw-r--r-- | ext2fs/truncate.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/ext2fs/truncate.c b/ext2fs/truncate.c index 6d35fd20..44aab3c7 100644 --- a/ext2fs/truncate.c +++ b/ext2fs/truncate.c @@ -296,6 +296,19 @@ diskfs_truncate (struct node *node, off_t length) is true for fast symlinks, and also apparently for some device nodes in linux. */ { + off_t froblen = node->dn_stat.st_size; + off_t frobmax = sizeof(diskfs_node_disknode (node)->info.i_data); + + if (froblen > frobmax) + { + ext2_warning ("inline data was %lld, more than max %lld", + (long long) froblen, (long long) frobmax); + froblen = frobmax; + } + froblen -= length; + memset (((char *) (diskfs_node_disknode (node)->info.i_data)) + length, + 0, froblen); + node->dn_stat.st_size = length; node->dn_set_mtime = 1; node->dn_set_ctime = 1; |