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scst: Fix three potential integer overflows

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@9103 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2020-08-03 03:29:33 +00:00
parent 0aed574e88
commit 2bafc3bd51
1 changed files with 3 additions and 3 deletions
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6
scst/src/scst_lib.c
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@@ -3640,7 +3640,7 @@ static int scst_full_len_to_data_len(u32 full_len, u32 block_shift)
u64 res;
u32 rem;
res = full_len << block_shift;
res = (u64)full_len << block_shift;
rem = do_div(res, (1 << block_shift) + (1 << SCST_DIF_TAG_SHIFT));
if (unlikely(rem != 0))
TRACE(TRACE_MINOR, "Reminder %d for full len! (full len%d)",
@@ -3665,7 +3665,7 @@ int scst_cmd_get_expected_transfer_len_data(struct scst_cmd *cmd)
if (!cmd->tgt_dif_data_expected)
return cmd->expected_transfer_len_full;
res = cmd->expected_transfer_len_full << cmd->dev->block_shift;
res = (u64)cmd->expected_transfer_len_full << cmd->dev->block_shift;
rem = do_div(res, cmd->dev->block_size + (1 << SCST_DIF_TAG_SHIFT));
if (unlikely(rem != 0))
TRACE(TRACE_MINOR, "Reminder %d for expected transfer len "
@@ -3691,7 +3691,7 @@ int scst_cmd_get_expected_transfer_len_dif(struct scst_cmd *cmd)
if (!cmd->tgt_dif_data_expected)
return 0;
res = cmd->expected_transfer_len_full << SCST_DIF_TAG_SHIFT;
res = (u64)cmd->expected_transfer_len_full << SCST_DIF_TAG_SHIFT;
rem = do_div(res, cmd->dev->block_size + (1 << SCST_DIF_TAG_SHIFT));
if (unlikely(rem != 0))
TRACE(TRACE_MINOR, "Reminder %d for expected transfer len dif! "