linux/fs/btrfs
Chris Mason 44fb551163 Btrfs: Fix oops and use after free during space balancing
The btrfs allocator uses list_for_each to walk the available block
groups when searching for free blocks.  It starts off with a hint
to help find the best block group for a given allocation.

The hint is resolved into a block group, but we don't properly check
to make sure the block group we find isn't in the middle of being
freed due to filesystem shrinking or balancing.  If it is being
freed, the list pointers in it are bogus and can't be trusted.  But,
the code happily goes along and uses them in the list_for_each loop,
leading to all kinds of fun.

The fix used here is to check to make sure the block group we find really
is on the list before we use it.  list_del_init is used when removing
it from the list, so we can do a proper check.

The allocation clustering code has a similar bug where it will trust
the block group in the current free space cluster.  If our allocation
flags have changed (going from single spindle dup to raid1 for example)
because the drives in the FS have changed, we're not allowed to use
the old block group any more.

The fix used here is to check the current cluster against the
current allocation flags.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
2009-06-04 15:41:27 -04:00
..
acl.c Btrfs: fix acl caching 2009-04-27 13:18:26 -04:00
async-thread.c Btrfs: add a priority queue to the async thread helpers 2009-04-20 15:53:08 -04:00
async-thread.h Btrfs: add a priority queue to the async thread helpers 2009-04-20 15:53:08 -04:00
btrfs_inode.h Btrfs: add extra flushing for renames and truncates 2009-03-31 14:27:58 -04:00
compat.h Btrfs: drop remaining LINUX_KERNEL_VERSION checks and compat code 2009-01-06 09:38:55 -05:00
compression.c Btrfs: removed unused #include <version.h>'s 2009-01-21 10:49:16 -05:00
compression.h Btrfs: Add zlib compression support 2008-10-29 14:49:59 -04:00
crc32c.h Btrfs: Drop the hardware crc32c asm code 2009-01-07 19:56:59 -05:00
ctree.c Btrfs: Don't loop forever on metadata IO failures 2009-05-14 14:00:32 -04:00
ctree.h Btrfs: fix fallocate deadlock on inode extent lock 2009-04-24 15:46:05 -04:00
delayed-ref.c Btrfs: remove unused ftrace include 2009-04-02 17:02:55 -04:00
delayed-ref.h Btrfs: make sure btrfs_update_delayed_ref doesn't increase ref_mod 2009-03-25 09:55:11 -04:00
dir-item.c Btrfs: leave btree locks spinning more often 2009-03-24 16:14:28 -04:00
disk-io.c Btrfs: remove some WARN_ONs in the IO failure path 2009-05-14 14:00:33 -04:00
disk-io.h Btrfs: leave btree locks spinning more often 2009-03-24 16:14:28 -04:00
export.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
export.h NFS support for btrfs - v3 2008-09-25 11:04:06 -04:00
extent_io.c Btrfs: remove #if 0 code 2009-04-27 07:40:52 -04:00
extent_io.h Btrfs: leave btree locks spinning more often 2009-03-24 16:14:28 -04:00
extent_map.c Btrfs: kill btrfs_cache_create 2009-04-24 15:46:04 -04:00
extent_map.h Btrfs: Fix csum error for compressed data 2008-11-10 07:34:43 -05:00
extent-tree.c Btrfs: Fix oops and use after free during space balancing 2009-06-04 15:41:27 -04:00
file-item.c Btrfs: leave btree locks spinning more often 2009-03-24 16:14:28 -04:00
file.c Btrfs: remove #if 0 code 2009-04-27 07:40:52 -04:00
free-space-cache.c Btrfs: Fix a bunch of printk() warnings. 2009-04-27 08:37:49 -04:00
free-space-cache.h Btrfs: rework allocation clustering 2009-04-03 09:47:43 -04:00
hash.h Switch btrfs_name_hash() to crc32c 2008-09-25 11:04:06 -04:00
inode-item.c Btrfs: leave btree locks spinning more often 2009-03-24 16:14:28 -04:00
inode-map.c Btrfs: Fix a trivial warning using max() of u64 vs ULL. 2009-04-27 08:37:49 -04:00
inode.c Btrfs: remove some WARN_ONs in the IO failure path 2009-05-14 14:00:33 -04:00
ioctl.c Btrfs: remove outdated comment in btrfs_ioctl_resize() 2009-05-14 14:00:33 -04:00
ioctl.h Btrfs: fix ioctl arg size (userland incompatible change!) 2009-01-16 11:59:08 -05:00
Kconfig Btrfs: make btrfs acls selectable 2009-02-04 09:28:28 -05:00
locking.c Btrfs: fix typos in comments 2009-04-02 16:46:06 -04:00
locking.h Btrfs: fix spinlock assertions on UP systems 2009-03-09 11:45:38 -04:00
Makefile Btrfs: simplify makefile 2009-04-24 15:46:03 -04:00
ordered-data.c Btrfs: use WRITE_SYNC for synchronous writes 2009-04-20 15:53:08 -04:00
ordered-data.h Btrfs: add extra flushing for renames and truncates 2009-03-31 14:27:58 -04:00
orphan.c Btrfs: Create orphan inode records to prevent lost files after a crash 2008-09-25 11:04:05 -04:00
print-tree.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
print-tree.h Btrfs: Create extent_buffer interface for large blocksizes 2008-09-25 11:03:56 -04:00
ref-cache.c Btrfs: Make btrfs_drop_snapshot work in larger and more efficient chunks 2009-02-04 09:27:02 -05:00
ref-cache.h Btrfs: Make btrfs_drop_snapshot work in larger and more efficient chunks 2009-02-04 09:27:02 -05:00
root-tree.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
struct-funcs.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
super.c Btrfs: make show_options result match actual option names 2009-05-14 14:00:34 -04:00
sysfs.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
transaction.c Btrfs: fix deadlocks and stalls on dead root removal 2009-04-24 15:46:05 -04:00
transaction.h Btrfs: reduce stalls during transaction commit 2009-03-24 16:14:26 -04:00
tree-defrag.c Btrfs: do extent allocation and reference count updates in the background 2009-03-24 16:14:25 -04:00
tree-log.c Btrfs: fix fallocate deadlock on inode extent lock 2009-04-24 15:46:05 -04:00
tree-log.h Btrfs: tree logging unlink/rename fixes 2009-03-24 16:14:52 -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: set device->total_disk_bytes when adding new device 2009-06-04 09:23:57 -04:00
volumes.h Btrfs: When shrinking, only update disk size on success 2009-04-27 07:40:51 -04:00
xattr.c Btrfs: selinux support 2009-02-04 09:29:13 -05:00
xattr.h Btrfs: selinux support 2009-02-04 09:29:13 -05:00
zlib.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00