git.openwrt.org Git - openwrt/staging/xback.git/blob

   1 From b9371866799d67a80be0ea9e01bd41987db22f26 Mon Sep 17 00:00:00 2001
   2 From: Md Sadre Alam <quic_mdalam@quicinc.com>
   3 Date: Mon, 6 Jan 2025 18:45:58 +0530
   4 Subject: [PATCH] mtd: rawnand: qcom: Fix build issue on x86 architecture
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 Fix a buffer overflow issue in qcom_clear_bam_transaction by using
  10 struct_group to group related fields and avoid FORTIFY_SOURCE warnings.
  11
  12 On x86 architecture, the following error occurs due to warnings being
  13 treated as errors:
  14
  15 In function ‘fortify_memset_chk’,
  16     inlined from ‘qcom_clear_bam_transaction’ at
  17 drivers/mtd/nand/qpic_common.c:88:2:
  18 ./include/linux/fortify-string.h:480:25: error: call to ‘__write_overflow_field’
  19 declared with attribute warning: detected write beyond size of field
  20 (1st parameter); maybe use struct_group()? [-Werror=attribute-warning]
  21   480 |                         __write_overflow_field(p_size_field, size);
  22       |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  23   LD [M]  drivers/mtd/nand/nandcore.o
  24   CC [M]  drivers/w1/masters/mxc_w1.o
  25 cc1: all warnings being treated as errors
  26
  27 This patch addresses the issue by grouping the related fields in
  28 struct bam_transaction using struct_group and updating the memset call
  29 accordingly.
  30
  31 Fixes: 8c52932da5e6 ("mtd: rawnand: qcom: cleanup qcom_nandc driver")
  32 Signed-off-by: Md Sadre Alam <quic_mdalam@quicinc.com>
  33 Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
  34 ---
  35  drivers/mtd/nand/qpic_common.c       |  2 +-
  36  include/linux/mtd/nand-qpic-common.h | 19 +++++++++++--------
  37  2 files changed, 12 insertions(+), 9 deletions(-)
  38
  39 --- a/drivers/mtd/nand/qpic_common.c
  40 +++ b/drivers/mtd/nand/qpic_common.c
  41 @@ -85,7 +85,7 @@ void qcom_clear_bam_transaction(struct q
  42         if (!nandc->props->supports_bam)
  43                 return;
  44
  45 -       memset(&bam_txn->bam_ce_pos, 0, sizeof(u32) * 8);
  46 +       memset(&bam_txn->bam_positions, 0, sizeof(bam_txn->bam_positions));
  47         bam_txn->last_data_desc = NULL;
  48
  49         sg_init_table(bam_txn->cmd_sgl, nandc->max_cwperpage *
  50 --- a/include/linux/mtd/nand-qpic-common.h
  51 +++ b/include/linux/mtd/nand-qpic-common.h
  52 @@ -254,14 +254,17 @@ struct bam_transaction {
  53         struct dma_async_tx_descriptor *last_data_desc;
  54         struct dma_async_tx_descriptor *last_cmd_desc;
  55         struct completion txn_done;
  56 -       u32 bam_ce_pos;
  57 -       u32 bam_ce_start;
  58 -       u32 cmd_sgl_pos;
  59 -       u32 cmd_sgl_start;
  60 -       u32 tx_sgl_pos;
  61 -       u32 tx_sgl_start;
  62 -       u32 rx_sgl_pos;
  63 -       u32 rx_sgl_start;
  64 +       struct_group(bam_positions,
  65 +               u32 bam_ce_pos;
  66 +               u32 bam_ce_start;
  67 +               u32 cmd_sgl_pos;
  68 +               u32 cmd_sgl_start;
  69 +               u32 tx_sgl_pos;
  70 +               u32 tx_sgl_start;
  71 +               u32 rx_sgl_pos;
  72 +               u32 rx_sgl_start;
  73 +
  74 +       );
  75  };
  76
  77  /*