linux-kernel - [PATCH v3 0/2] spi: spi-qpic-snand: avoid memory corruption

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Message-Id: <20250618-qpic-snand-avoid-mem-corruption-v3-0-319c71296cda@gmail.com>
Date: Wed, 18 Jun 2025 22:22:48 +0200
From: Gabor Juhos <j4g8y7@...il.com>
To: Mark Brown <broonie@...nel.org>, 
 Md Sadre Alam <quic_mdalam@...cinc.com>, 
 Varadarajan Narayanan <quic_varada@...cinc.com>, 
 Sricharan Ramabadhran <quic_srichara@...cinc.com>, 
 Miquel Raynal <miquel.raynal@...tlin.com>, 
 Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>
Cc: linux-spi@...r.kernel.org, linux-mtd@...ts.infradead.org, 
 linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Gabor Juhos <j4g8y7@...il.com>, Lakshmi Sowjanya D <quic_laksd@...cinc.com>
Subject: [PATCH v3 0/2] spi: spi-qpic-snand: avoid memory corruption

The 'spi-qpic-nand' driver may cause memory corruption under some
circumstances. The first patch in the series changes the driver to
avoid that, whereas the second adds some sanity checks to the common
QPIC code in order to make detecting such errors easier in the future.

Preferably, the two patches should go along in via the SPI tree.
It is not a strict requirement though, in the case the second patch
gets included separately through the MTD tree it reveals the bug
which is fixed in the first patch.

Signed-off-by: Gabor Juhos <j4g8y7@...il.com>
---
Changes in v3:
  - rebase on top of current spi/for-6.16
  - add 'Acked-by' tag from Miquel to patch 2
  - Link to v2: https://lore.kernel.org/r/20250529-qpic-snand-avoid-mem-corruption-v2-0-2f0d13afc7d2@gmail.com

Changes in v2:
  - collect offered tags
  - reduce kernel log spam in commit description of patch 1
  - remove inline error printing function from patch 2, and adjust the
    commit message of the patch
  - Link to v1: https://lore.kernel.org/r/20250525-qpic-snand-avoid-mem-corruption-v1-0-5fe528def7fb@gmail.com

---
Gabor Juhos (2):
      spi: spi-qpic-snand: reallocate BAM transactions
      mtd: nand: qpic_common: prevent out of bounds access of BAM arrays

 drivers/mtd/nand/qpic_common.c       | 30 ++++++++++++++++++++++++++----
 drivers/spi/spi-qpic-snand.c         | 16 ++++++++++++++++
 include/linux/mtd/nand-qpic-common.h |  8 ++++++++
 3 files changed, 50 insertions(+), 4 deletions(-)
---
base-commit: d57e92dd660014ccac884eda616cafc7b04601e0
change-id: 20250523-qpic-snand-avoid-mem-corruption-301afabeb0eb

Best regards,
-- 
Gabor Juhos <j4g8y7@...il.com>