In commit 178ac51073 (affs: Fix memory leaks), fixes were made to
grub_affs_iterate_dir() to prevent memory leaks from occurring after it
returns without freeing node. However, there were still some instances
where node was causing a memory leak when the function returns after
calling grub_affs_create_node(). In this function, new memory is
allocated to node but doesn't get freed until the hook() function is
called near the end. Before hook() is called, node should be freed in
grub_affs_create_node() before returning out of it.
Fixes: 178ac51073 (affs: Fix memory leaks)
Fixes: CID 73759
Signed-off-by: Alec Brown <alec.r.brown@oracle.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Some filesystems nowadays use 64-bit types for timestamps. So, update
grub_dirhook_info struct to use an grub_int64_t type to store mtime.
This also updates the grub_unixtime2datetime() function to receive
a 64-bit timestamp argument and do 64-bit-safe divisions.
All the remaining conversion from 32-bit to 64-bit should be safe, as
32-bit to 64-bit attributions will be implicitly casted. The most
critical part in the 32-bit to 64-bit conversion is in the function
grub_unixtime2datetime() where it needs to deal with the 64-bit type.
So, for that, the grub_divmod64() helper has been used.
These changes enables the GRUB to support dates beyond y2038.
Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The node structure reference is being allocated but not freed if it
reaches the end of the function. If any of the hooks had returned
a non-zero value, then node would have been copied in to the context
reference, but otherwise node is not stored and should be freed.
Similarly, the call to grub_affs_create_node() replaces the allocated
memory in node with a newly allocated structure, leaking the existing
memory pointed by node.
Finally, when dir->parent is set, then we again replace node with newly
allocated memory, which seems unnecessary when we copy in the values
from dir->parent immediately after.
Fixes: CID 73759
Signed-off-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This modifies most of the places we do some form of:
X = malloc(Y * Z);
to use calloc(Y, Z) instead.
Among other issues, this fixes:
- allocation of integer overflow in grub_png_decode_image_header()
reported by Chris Coulson,
- allocation of integer overflow in luks_recover_key()
reported by Chris Coulson,
- allocation of integer overflow in grub_lvm_detect()
reported by Chris Coulson.
Fixes: CVE-2020-14308
Signed-off-by: Peter Jones <pjones@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
* grub-core/fs/affs.c (grub_affs_file): Make type unsigned.
(aftime2ctime): New function.
(grub_affs_dir): Use aftime2ctime.
(grub_affs_label): Fix return value.
(grub_affs_mtime): New function.
(grub_affs_fs): Add mtime.
* grub-core/fs/affs.c (grub_affs_bblock): Replace flags with version.
(GRUB_AFFS_FLAG_FFS): Removed.
(GRUB_AFFS_SYMLINK_SIZE): Likewise.
(GRUB_AFFS_FILETYPE_DIR): Make positive and unsigned.
(GRUB_AFFS_FILETYPE_DIR), (GRUB_AFFS_FILETYPE_REG): Fix a mix-up.
(grub_fshelp_node): Make block 32-bit.
Add block_cache and last_block_cache.
(grub_affs_read_block): Fill and use block cache.
(grub_affs_read_file): Removed.
(grub_affs_mount): Zero-fill node. Fix version check. Don't reread
boot block.
(grub_affs_read_symlink): Fix symlink size. Add a \0 at the end for
safety.
(grub_affs_iterate_dir): Use more appropriate types. Zero-fill allocated
space.
(grub_affs_close): Free block cache.
(grub_affs_read): Use grub_fshelp_read_file directly.
* grub-core/fs/affs.c (grub_affs_read_file): Use grub_off_t for offset.
* grub-core/fs/afs.c (grub_afs_read_file): Likewise.
* grub-core/fs/fshelp.c (grub_fshelp_find_file): Remove leftover
variable.
* grub-core/fs/hfs.c (grub_hfs_read_file): Use grub_off_t for offset
and connected types.
* grub-core/fs/nilfs2.c (grub_nilfs2_read_file): Use grub_off_t for
offset.
(grub_nilfs2_iterate_dir): Use grub_off_t for fpos.
* grub-core/fs/sfs.c (grub_sfs_read_file): Use grub_off_t for offset.
* grub-core/fs/ufs.c (grub_ufs_read_file): Use grub_off_t for offset
and connected types.
* grub-core/kern/misc.c (grub_divmod64_full): Renamed to ...
(grub_divmod64): ... this.
* include/grub/misc.h (grub_divmod64): Removed. All users switch to full
version.
* grub-core/fs/affs.c (grub_affs_time): New struct.
(grub_affs_file): New field mtime.
(grub_fshelp_node): Changed 'block' and 'parent' to more appropriate
type. Removed 'size'. New field 'di'. All users updated.
(grub_affs_mount): Simplify checsum checking.
(grub_affs_iterate_dir): New helper grub_affs_create_node.
(grub_affs_dir): Handle mtime.
* grub-core/fs/cpio.c (grub_cpio_find_file): Handle mtime.
(grub_cpio_dir): Likewise.
* grub-core/fs/hfs.c (grub_hfs_dirrec): New fields 'ctime' and 'mtime'.
(grub_hfs_filerec): New field mtime.
(grub_hfs_dir): Handle mtime.
(grub_hfs_mtime): New function.
(grub_hfs_fs): Register grub_hfs_mtime.
* grub-core/fs/iso9660.c (grub_iso9660_date2): New struct.
(grub_iso9660_dir): New field mtime.
(grub_fshelp_node): New field dirent.
(iso9660_to_unixtime): New function.
(iso9660_to_unixtime2): Likewise.
(grub_iso9660_read_symlink): Use node->dirent.
(grub_iso9660_iterate_dir): Likewise.
(grub_iso9660_dir): Set mtime.
(grub_iso9660_mtime): New function.
(grub_iso9660_fs): Register grub_iso9660_mtime.
* grub-core/fs/jfs.c (grub_jfs_time): New struct.
(grub_jfs_inode): New fields atime, ctime and mtime.
(grub_jfs_dir): Set mtime.
* grub-core/fs/minix.c (grub_minix_dir): Likewise.
* grub-core/fs/ntfs.c (list_file): Set mtime.
(grub_ntfs_dir): Likewise.
* grub-core/fs/reiserfs.c (grub_fshelp_node): New field 'mtime'.
(grub_reiserfs_iterate_dir): Set mtime.
(grub_reiserfs_dir): Likewise.
* grub-core/fs/sfs.c (grub_sfs_obj): New field mtime.
(grub_fshelp_node): Likewise.
(grub_sfs_iterate_dir): Set mtime.
(grub_sfs_dir): Likewise.
* grub-core/fs/udf.c (grub_udf_dir): Set mtime.
* grub-core/fs/xfs.c (grub_xfs_time): New struct.
(grub_xfs_inode): New fields atime, mtime, ctime.
(grub_xfs_dir): Set mtime.
* include/grub/datetime.h (grub_datetime2unixtime): New function.
* include/grub/hfs.h (grub_hfs_sblock): New fields ctime and mtime.
* include/grub/ntfs.h (grub_fshelp_node): New field mtime.
Support UDF symlinks.
* grub-core/fs/udf.c (grub_udf_iterate_dir): Handle symlinks.
(grub_ufs_read_symlink): New function. All users updated.
Check amiga partmap checksum.
* grub-core/partmap/amiga.c (grub_amiga_rdsk): Pad to 128 bytes.
(grub_amiga_partition): Likewise.
(amiga_partition_map_checksum): New function.
(amiga_partition_map_iterate): Check checksum.
