Comment 0 for bug 496816

SRU Justification/Impact: The upstream process for stable tree updates is quite similar in scope to the Ubuntu SRU process, e.g., each patch has to demonstrably fix a bug, and each patch is vetted by upstream by originating either directly from Linus' tree or in a minimally backported form of that patch. The 2.6.31.8 upstream stable patch set is now available. It should be included in the Ubuntu kernel as well.

TEST CASE: TBD

http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.8

http://kernel.org/pub/linux/kernel/v2.6/patch-2.6.31.8.bz2

The 2.6.31.8 Upstream Stable Kernel brings in the following 91 patches:

* ext4: Fix memory leak fix when mounting an ext4 filesystem
* ext4: Avoid null pointer dereference when decoding EROFS w/o a journal
* jbd2: Fail to load a journal if it is too short
* jbd2: round commit timer up to avoid uncommitted transaction
* ext4: fix journal ref count in move_extent_par_page
* ext4: Fix bugs in mballoc's stream allocation mode
* ext4: Avoid group preallocation for closed files
* jbd2: Annotate transaction start also for jbd2_journal_restart()
* ext4: Fix possible deadlock between ext4_truncate() and ext4_get_blocks()
* ext4: reject too-large filesystems on 32-bit kernels
* ext4: Add feature set check helper for mount & remount paths
* ext4: Add missing unlock_new_inode() call in extent migration code
* ext4: Allow rename to create more than EXT4_LINK_MAX subdirectories
* ext4: Limit number of links that can be created by ext4_link()
* ext4: Restore wbc->range_start in ext4_da_writepages()
* ext4: fix cache flush in ext4_sync_file
* ext4: Fix wrong comparisons in mext_check_arguments()
* ext4: Remove unneeded BUG_ON() in ext4_move_extents()
* ext4: Return exchanged blocks count to user space in failure
* ext4: Take page lock before looking at attached buffer_heads flags
* ext4: print more sysadmin-friendly message in check_block_validity()
* ext4: Use bforget() in no journal mode for ext4_journal_{forget,revoke}()
* ext4: Assure that metadata blocks are written during fsync in no journal mode
* ext4: Make non-journal fsync work properly
* ext4: move ext4_mb_init_group() function earlier in the mballoc.c
* ext4: check for need init flag in ext4_mb_load_buddy
* ext4: Don't update superblock write time when filesystem is read-only
* ext4: Always set dx_node's fake_dirent explicitly.
* ext4: Fix initalization of s_flex_groups
* ext4: Fix include/trace/events/ext4.h to work with Systemtap
* ext4: Fix small typo for move_extent_per_page()
* ext4: Replace get_ext_path macro with an inline funciton
* ext4: Replace BUG_ON() with ext4_error() in move_extents.c
* ext4: Add null extent check to ext_get_path
* ext4: Fix different block exchange issue in EXT4_IOC_MOVE_EXT
* ext4: limit block allocations for indirect-block files to < 2^32
* ext4: store EXT4_EXT_MIGRATE in i_state instead of i_flags
* ext4: Fix the alloc on close after a truncate hueristic
* ext4: Fix hueristic which avoids group preallocation for closed files
* ext4: Adjust ext4_da_writepages() to write out larger contiguous chunks
* ext4: release reserved quota when block reservation for delalloc retry
* ext4: Split uninitialized extents for direct I/O
* ext4: Use end_io callback to avoid direct I/O fallback to buffered I/O
* ext4: async direct IO for holes and fallocate support
* ext4: EXT4_IOC_MOVE_EXT: Check for different original and donor inodes first
* ext4: Avoid updating the inode table bh twice in no journal mode
* ext4: Make sure ext4_dirty_inode() updates the inode in no journal mode
* ext4: Handle nested ext4_journal_start/stop calls without a journal
* ext4: Fix time encoding with extra epoch bits
* ext4: fix a BUG_ON crash by checking that page has buffers attached to it
* ext4: retry failed direct IO allocations
* ext4: discard preallocation when restarting a transaction during truncate
* ext4: fix ext4_ext_direct_IO()'s return value after converting uninit extents
* ext4: skip conversion of uninit extents after direct IO if there isn't any
* ext4: code clean up for dio fallocate handling
* ext4: Fix return value of ext4_split_unwritten_extents() to fix direct I/O
* ext4: fix potential buffer head leak when add_dirent_to_buf() returns ENOSPC
* ext4: avoid divide by zero when trying to mount a corrupted file system
* ext4: fix the returned block count if EXT4_IOC_MOVE_EXT fails
* ext4: fix lock order problem in ext4_move_extents()
* ext4: fix possible recursive locking warning in EXT4_IOC_MOVE_EXT
* ext4: plug a buffer_head leak in an error path of ext4_iget()
* ext4: make sure directory and symlink blocks are revoked
* ext4: fix i_flags access in ext4_da_writepages_trans_blocks()
* ext4: journal all modifications in ext4_xattr_set_handle
* ext4: don't update the superblock in ext4_statfs()
* ext4: fix uninit block bitmap initialization when s_meta_first_bg is non-zero
* ext4: fix block validity checks so they work correctly with meta_bg
* ext4: avoid issuing unnecessary barriers
* ext4: fix error handling in ext4_ind_get_blocks()
* ext4: make trim/discard optional (and off by default)
* ext4: make "norecovery" an alias for "noload"
* ext4: Fix double-free of blocks with EXT4_IOC_MOVE_EXT
* ext4: initialize moved_len before calling ext4_move_extents()
* ext4: move_extent_per_page() cleanup
* jbd2: Add ENOMEM checking in and for jbd2_journal_write_metadata_buffer()
* ext4: Return the PTR_ERR of the correct pointer in setup_new_group_blocks()
* ext4: Avoid data / filesystem corruption when write fails to copy data
* ext4: wait for log to commit when umounting
* ext4: remove blocks from inode prealloc list on failure
* ext4: ext4_get_reserved_space() must return bytes instead of blocks
* ext4: quota macros cleanup
* ext4: fix incorrect block reservation on quota transfer.
* ext4: Wait for proper transaction commit on fsync
* ext4: Fix insufficient checks in EXT4_IOC_MOVE_EXT
* SCSI: megaraid_sas: fix 64 bit sense pointer truncation
* SCSI: osd_protocol.h: Add missing #include
* SCSI: scsi_lib_dma: fix bug with dma maps on nested scsi objects
* signal: Fix alternate signal stack check
* ext4: Fix potential fiemap deadlock (mmap_sem vs. i_data_sem)
* Linux 2.6.31.8