Dan Rosenberg 51788b1bdd btrfs: prevent heap corruption in btrfs_ioctl_space_info() ... Commit bf5fc093c5 refactored btrfs_ioctl_space_info() and introduced several security issues. space_args.space_slots is an unsigned 64-bit type controlled by a possibly unprivileged caller. The comparison as a signed int type allows providing values that are treated as negative and cause the subsequent allocation size calculation to wrap, or be truncated to 0. By providing a size that's truncated to 0, kmalloc() will return ZERO_SIZE_PTR. It's also possible to provide a value smaller than the slot count. The subsequent loop ignores the allocation size when copying data in, resulting in a heap overflow or write to ZERO_SIZE_PTR. The fix changes the slot count type and comparison typecast to u64, which prevents truncation or signedness errors, and also ensures that we don't copy more data than we've allocated in the subsequent loop. Note that zero-size allocations are no longer possible since there is already an explicit check for space_args.space_slots being 0 and truncation of this value is no longer an issue. Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com> Signed-off-by: Josef Bacik <josef@redhat.com> Reviewed-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>		2011-02-14 16:04:23 -05:00
..
Kconfig	btrfs: Add lzo compression support	2010-12-22 23:15:47 +08:00
Makefile	btrfs: Add lzo compression support	2010-12-22 23:15:47 +08:00
acl.c	Merge branch 'bug-fixes' of git://repo.or.cz/linux-btrfs-devel into btrfs-38	2011-01-28 16:24:59 -05:00
async-thread.c	Btrfs: don't walk around with task->state != TASK_RUNNING	2010-05-25 10:34:58 -04:00
async-thread.h	Btrfs: fix deadlock on async thread startup	2009-10-05 09:44:45 -04:00
btrfs_inode.h	btrfs: Allow to add new compression algorithm	2010-12-22 23:15:45 +08:00
compat.h	Btrfs: drop remaining LINUX_KERNEL_VERSION checks and compat code	2009-01-06 09:38:55 -05:00
compression.c	btrfs: Drop __exit attribute on btrfs_exit_compress	2011-02-06 07:19:19 -05:00
compression.h	btrfs: Extract duplicate decompress code	2010-12-22 23:15:50 +08:00
ctree.c	btrfs: check NULL or not	2011-01-16 11:30:20 -05:00
ctree.h	Btrfs: forced readonly mounts on errors	2011-01-17 15:13:08 -05:00
delayed-ref.c	Btrfs: Integrate metadata reservation with start_transaction	2010-05-25 10:34:50 -04:00
delayed-ref.h	Btrfs: Integrate metadata reservation with start_transaction	2010-05-25 10:34:50 -04:00
dir-item.c	Btrfs: Fix variables set but not read (bugs found by gcc 4.6)	2010-10-29 15:14:31 -04:00
disk-io.c	Btrfs: fix page->private races	2011-02-14 13:03:52 -05:00
disk-io.h	Btrfs: forced readonly mounts on errors	2011-01-17 15:13:08 -05:00
export.c	btrfs: fix several uncheck memory allocations	2011-01-28 16:40:36 -05:00
export.h	NFS support for btrfs - v3	2008-09-25 11:04:06 -04:00
extent-tree.c	Btrfs: exclude super blocks when we read in block groups	2011-02-06 07:17:44 -05:00
extent_io.c	Btrfs: don't release pages when we can't clear the uptodate bits	2011-02-14 13:04:01 -05:00
extent_io.h	btrfs: Allow to add new compression algorithm	2010-12-22 23:15:45 +08:00
extent_map.c	btrfs: Allow to add new compression algorithm	2010-12-22 23:15:45 +08:00
extent_map.h	btrfs: Allow to add new compression algorithm	2010-12-22 23:15:45 +08:00
file-item.c	Btrfs: do error checking in btrfs_del_csums	2011-01-28 16:42:34 -05:00
file.c	Btrfs: Fix page count calculation	2011-02-07 14:13:51 -05:00
free-space-cache.c	Btrfs: make sure search_bitmap finds something in remove_from_bitmap	2011-02-06 07:13:12 -05:00
free-space-cache.h	Btrfs: load free space cache if it exists	2010-10-29 09:26:35 -04:00
hash.h	Btrfs: remove crc32c.h and use libcrc32c directly.	2009-06-10 11:29:53 -04:00
inode-item.c	Btrfs: Integrate metadata reservation with start_transaction	2010-05-25 10:34:50 -04:00
inode-map.c	Btrfs: do not reuse objectid of deleted snapshot/subvol	2009-09-21 15:56:00 -04:00
inode.c	btrfs: cleanup error handling in btrfs_unlink_inode()	2011-02-06 07:17:45 -05:00
ioctl.c	btrfs: prevent heap corruption in btrfs_ioctl_space_info()	2011-02-14 16:04:23 -05:00
ioctl.h	Merge branch 'lzo-support' of git://repo.or.cz/linux-btrfs-devel into btrfs-38	2011-01-16 11:25:54 -05:00
locking.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
locking.h	Btrfs: fix spinlock assertions on UP systems	2009-03-09 11:45:38 -04:00
lzo.c	btrfs: Extract duplicate decompress code	2010-12-22 23:15:50 +08:00
ordered-data.c	Btrfs: avoid uninit variable warnings in ordered-data.c	2011-01-31 20:33:37 -05:00
ordered-data.h	btrfs: Allow to add new compression algorithm	2010-12-22 23:15:45 +08:00
orphan.c	Btrfs: fixup return code for btrfs_del_orphan_item	2010-12-09 13:57:15 -05:00
print-tree.c	btrfs: fix missing break in switch phrase	2011-01-28 16:40:37 -05:00
print-tree.h	Btrfs: Create extent_buffer interface for large blocksizes	2008-09-25 11:03:56 -04:00
ref-cache.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
ref-cache.h	Btrfs: use RB_ROOT to intialize rb_trees instead of setting rb_node to NULL	2010-03-08 16:26:50 -05:00
relocation.c	Btrfs: Fix balance panic	2011-02-14 16:00:03 -05:00
root-tree.c	Btrfs: cleanup warnings from gcc 4.6 (nonbugs)	2010-10-29 15:14:37 -04:00
struct-funcs.c	Btrfs: Fix checkpatch.pl warnings	2009-01-05 21:25:51 -05:00
super.c	btrfs: fix return value check of btrfs_start_transaction()	2011-02-01 07:17:27 -05:00
sysfs.c	Driver core: Constify struct sysfs_ops in struct kobj_type	2010-03-07 17:04:49 -08:00
transaction.c	btrfs: fix return value check of btrfs_join_transaction()	2011-01-28 16:40:37 -05:00
transaction.h	Btrfs: Add readonly snapshots support	2010-12-23 08:49:17 +08:00
tree-defrag.c	Btrfs: cleanup warnings from gcc 4.6 (nonbugs)	2010-10-29 15:14:37 -04:00
tree-log.c	btrfs: fix return value check of btrfs_start_transaction()	2011-02-01 07:17:27 -05:00
tree-log.h	Btrfs: Metadata ENOSPC handling for tree log	2010-05-25 10:34:53 -04:00
version.h	Update Btrfs files for in-kernel usage	2008-09-25 15:41:59 -04:00
version.sh	Btrfs: Fixes for 2.6.28-rc API changes	2008-11-19 21:17:22 -05:00
volumes.c	btrfs: fix return value check of btrfs_start_transaction()	2011-02-01 07:17:27 -05:00
volumes.h	btrfs: fix wrong free space information of btrfs	2011-01-16 11:30:19 -05:00
xattr.c	Btrfs: Add readonly snapshots support	2010-12-23 08:49:17 +08:00
xattr.h	btrfs: constify xattr_handler	2010-05-21 18:31:18 -04:00
zlib.c	btrfs: Extract duplicate decompress code	2010-12-22 23:15:50 +08:00