I added __rcu decorations to s_group_desc, s_group_info and
s_flex_group, and this turned up quite a few places where we were
missing an rcu_dereference. A number of them weren't strictly
necessary, but suppress warnings from the sparse code analysis tool
--- and sparse did find some places where the missing rcu_deference
could have led to some very hard to find bugs!
I folded the "introduce macro sbi_array_rcu_deref() to access rcu
protected fields" patch into the first patch, since we now need to use
the array in many more places.
Suraj Jitindar Singh (2):
ext4: fix potential race between s_group_info online resizing and
access
ext4: fix potential race between s_flex_groups online resizing and
access
Theodore Ts'o (1):
ext4: fix potential race between online resizing and write operations
fs/ext4/balloc.c | 14 +++++--
fs/ext4/ext4.h | 30 ++++++++++---
fs/ext4/ialloc.c | 23 ++++++----
fs/ext4/mballoc.c | 61 ++++++++++++++++++---------
fs/ext4/resize.c | 62 +++++++++++++++++++++------
fs/ext4/super.c | 105 ++++++++++++++++++++++++++++++++--------------
6 files changed, 212 insertions(+), 83 deletions(-)
--
2.24.1
