* [PATCH v4 0/2] fix the missing underflow in memory operation function
@ 2019-11-12 6:52 Walter Wu
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From: Walter Wu @ 2019-11-12 6:52 UTC (permalink / raw)
To: Andrey Ryabinin, Alexander Potapenko, Dmitry Vyukov, Matthias Brugger
Cc: kasan-dev, linux-mm, linux-kernel, linux-arm-kernel,
wsd_upstream, linux-mediatek, Walter Wu
The patchsets help to produce KASAN report when size is negative numbers
in memory operation function. It is helpful for programmer to solve the
undefined behavior issue. Patch 1 based on Dmitry's review and
suggestion, patch 2 is a test in order to verify the patch 1.
[1]https://bugzilla.kernel.org/show_bug.cgi?id=199341
[2]https://lore.kernel.org/linux-arm-kernel/20190927034338.15813-1-walter-zh.wu@mediatek.com/
Walter Wu (2):
kasan: detect negative size in memory operation function
kasan: add test for invalid size in memmove
---
Changes in v2:
fix the indentation, thanks for the reminder Matthew.
Changes in v3:
Add a confition for memory operation function, need to
avoid the false alarm when KASAN un-initialized.
Changes in v4:
modify negative size condition
modify comments
modify the fixed code about early stages of boot
---
include/linux/kasan.h | 2 +-
lib/test_kasan.c | 18 ------------------
mm/kasan/common.c | 25 +++++++------------------
mm/kasan/generic.c | 9 ++++-----
mm/kasan/generic_report.c | 11 -----------
mm/kasan/kasan.h | 2 +-
mm/kasan/report.c | 5 ++++-
mm/kasan/tags.c | 9 ++++-----
mm/kasan/tags_report.c | 11 -----------
9 files changed, 21 insertions(+), 71 deletions(-)
--
2.18.0
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