[PATCH 0/5] btrfs-progs: btrfs path leak fix, part 1

[Qu Wenruo <wqu@suse.com>]

To avoid future LLM script kiddos, we need to fix path leaks.

This is part 1, focusing on leaks on btrfs_alloc_path().

The most important part is the second patch, which introduces
BTRFS_PATH_AUTO_(FREE|RELEASE), so that we can finally get the same
capability.

Unfortunately this will require the compiler support for the __cleanup__
attribute. If not supported, configure will reject the build.

Then several fixes using BTRFS_PATH_AUTO_FREE().

The last one has several other small fixes batched together, as they are
all inside the same btrfs-corrupt-block.

Part 2 will focus on the on-stack paths, which can still leak the ebs,
and are the most common sites in btrfs-progs.

Qu Wenruo (5):
  btrfs-progs: introduce compiler_attributes.h
  btrfs-progs: utilize __cleanup__ attribute for btrfs_path
  btrfs-progs: sync btrfs_translate_remap() to fix a path leak
  btrfs-progs: fix a path leak in alloc_reserved_tree_block()
  btrfs-progs: fix several memory bugs in btrfs-corrupt-block

 btrfs-corrupt-block.c         | 34 ++++++++-----
 configure.ac                  | 15 ++++++
 include/compiler_attributes.h | 39 +++++++++++++++
 include/kerncompat.h          |  7 +--
 kernel-lib/overflow.h         |  8 +---
 kernel-shared/cleanup.h       | 89 +++++++++++++++++++++++++++++++++++
 kernel-shared/ctree.h         | 10 ++++
 kernel-shared/extent-tree.c   |  4 +-
 kernel-shared/volumes.c       | 55 +++++-----------------
 9 files changed, 193 insertions(+), 68 deletions(-)
 create mode 100644 include/compiler_attributes.h
 create mode 100644 kernel-shared/cleanup.h

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2.56.0