[PATCH 0/2] Misc ext4 fixes

From: Ruslan Bilovol
Date: Mon Jun 03 2013 - 06:00:29 EST

Hello guys,

Here are few patches that add sanity checks
before dereferencing some pointers inside of
ext4/jbd2 functions and help to avoid some crashes
on systems under high load and limited resources.
I met them in next usecase: writing a high-bitrate
video to ext4 partition from HD webcam. The issues
appear very rare.
I do not know if these issues are already fixed in some
maintainers repo, but they are still applicable
to 3.10-rc4 tag on which they are based on.
I understand that just sanity checking may not be
enough and the root cause may be in some other
place, so I hope the patches will be reviewed
by ext4 guru as well.


Ruslan Bilovol (2):
jbd2: check bh->b_data for NULL in jbd2_journal_get_descriptor_buffer
before memset()
ext4: add sanity checks in __ext4_check_dir_entry

fs/ext4/dir.c | 8 ++++++--
fs/jbd2/journal.c | 2 +-
2 files changed, 7 insertions(+), 3 deletions(-)


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