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xfs: fix possible inode corruption in directory scan 

grub_xfs_iterate_dir did not restore first character after inline
name when match was found. Dependning on XFS format this character
could be inode number and we could return to the same node later in
find_file if processing cycled symlinks.

CID: 86724
This commit is contained in:
Andrei Borzenkov 2016-01-09 18:55:55 +03:00
parent bd60f5a207
commit aafd205c92
1 changed files with 4 additions and 1 deletions
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5
grub-core/fs/xfs.c
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@ -775,7 +775,10 @@ grub_xfs_iterate_dir (grub_fshelp_node_t dir,
c = de->name[de->len];
de->name[de->len] = '\0';
if (iterate_dir_call_hook (ino, de->name, &ctx))
return 1;
{
de->name[de->len] = c;
return 1;
}
de->name[de->len] = c;
de = grub_xfs_inline_next_de(dir->data, head, de);