[RFC PATCH v2 0/2] lib, stackdepot: check stackdepot handle before accessing slabs

From: Imran Khan
Date: Wed Sep 01 2021 - 20:02:33 EST


Original cover letter
---------------------------------------
This RFC patch series addresses suggestion discussed in an earlier
RFC [1]. Since earlier RFC was about SLUB subsystem, and current
changes only involve stackdepot, I am submitting the patches in
a new thread.

The changes of this patch set are as follows:

PATCH-1: Checks validity of a stackdepot handle before proceeding
to access stackdepot slab/objects.

PATCH-2: Adds a helper in stackdepot, to allow users to print
stack entries just by specifying the stackdepot handle.

[1] https://lore.kernel.org/lkml/2772cf56-4183-857f-d070-c54bceb5c8d9@xxxxxxx/
--------------------------------------

Changes in v2:
- remove WARN messages
- add declaration of stack_depot_print in stackdepot.h
- make current users, which use stack_depot_fetch + stack_trace_print
to print stack entries, use stack_depot_print

Imran Khan (2):
lib, stackdepot: check stackdepot handle before accessing slabs.
lib, stackdepot: Add helper to print stack entries.

include/linux/stackdepot.h | 2 ++
lib/stackdepot.c | 20 ++++++++++++++++++++
mm/kasan/report.c | 15 +++------------
mm/page_owner.c | 13 ++++---------
4 files changed, 29 insertions(+), 21 deletions(-)

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2.30.2