65 lines
2.5 KiB
Diff
65 lines
2.5 KiB
Diff
From 8557d38b8d660d07c7b6fd1bfa62182cc6c52400 Mon Sep 17 00:00:00 2001
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From: Stefan Weil <sw@weilnetz.de>
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Date: Mon, 3 Sep 2012 22:13:56 +0200
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Subject: [PATCH] ide: Fix error messages from static code analysis (no real
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error)
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Report from smatch:
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hw/ide/core.c:1472 ide_exec_cmd(423) error: buffer overflow 'smart_attributes' 8 <= 29
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hw/ide/core.c:1474 ide_exec_cmd(425) error: buffer overflow 'smart_attributes' 8 <= 29
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hw/ide/core.c:1475 ide_exec_cmd(426) error: buffer overflow 'smart_attributes' 8 <= 29
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...
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The upper limit of 30 was never reached because both for loops terminated
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when 'smart_attributes' reached end of list, so there was no real buffer
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overflow.
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Nevertheless, changing the code not only fixes the error report, but also
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reduces the size of smart_attributes and simplifies the for loops.
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Signed-off-by: Stefan Weil <sw@weilnetz.de>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit 1e53537fdaa4657d11f130a0f2673fcfb1956381)
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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---
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hw/ide/core.c | 11 ++---------
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1 file changed, 2 insertions(+), 9 deletions(-)
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diff --git a/hw/ide/core.c b/hw/ide/core.c
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index d65ef3d..d6fb69c 100644
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--- a/hw/ide/core.c
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+++ b/hw/ide/core.c
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@@ -53,8 +53,6 @@ static const int smart_attributes[][12] = {
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{ 0x0c, 0x03, 0x00, 0x64, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
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/* airflow-temperature-celsius */
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{ 190, 0x03, 0x00, 0x45, 0x45, 0x1f, 0x00, 0x1f, 0x1f, 0x00, 0x00, 0x32},
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- /* end of list */
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- { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
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};
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static int ide_handle_rw_error(IDEState *s, int error, int op);
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@@ -1468,9 +1466,7 @@ void ide_exec_cmd(IDEBus *bus, uint32_t val)
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case SMART_READ_THRESH:
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memset(s->io_buffer, 0, 0x200);
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s->io_buffer[0] = 0x01; /* smart struct version */
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- for (n=0; n<30; n++) {
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- if (smart_attributes[n][0] == 0)
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- break;
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+ for (n = 0; n < ARRAY_SIZE(smart_attributes); n++) {
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s->io_buffer[2+0+(n*12)] = smart_attributes[n][0];
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s->io_buffer[2+1+(n*12)] = smart_attributes[n][11];
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}
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@@ -1484,10 +1480,7 @@ void ide_exec_cmd(IDEBus *bus, uint32_t val)
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case SMART_READ_DATA:
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memset(s->io_buffer, 0, 0x200);
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s->io_buffer[0] = 0x01; /* smart struct version */
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- for (n=0; n<30; n++) {
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- if (smart_attributes[n][0] == 0) {
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- break;
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- }
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+ for (n = 0; n < ARRAY_SIZE(smart_attributes); n++) {
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int i;
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for(i = 0; i < 11; i++) {
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s->io_buffer[2+i+(n*12)] = smart_attributes[n][i];
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