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| author | Stefan Weil <sw@weilnetz.de> | 2012-09-03 22:13:56 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2012-09-12 15:50:09 +0200 |
| commit | 1e53537fdaa4657d11f130a0f2673fcfb1956381 (patch) | |
| tree | 09f2dec1dd35f40e3d919eed881d09e17fab8674 /hw/ide/core.c | |
| parent | ce560dcf20c14194db5ef3b9fc1ea592d4e68109 (diff) | |
| download | qemu-1e53537fdaa4657d11f130a0f2673fcfb1956381.tar.gz | |
ide: Fix error messages from static code analysis (no real error)
Report from smatch:
hw/ide/core.c:1472 ide_exec_cmd(423) error: buffer overflow 'smart_attributes' 8 <= 29
hw/ide/core.c:1474 ide_exec_cmd(425) error: buffer overflow 'smart_attributes' 8 <= 29
hw/ide/core.c:1475 ide_exec_cmd(426) error: buffer overflow 'smart_attributes' 8 <= 29
...
The upper limit of 30 was never reached because both for loops terminated
when 'smart_attributes' reached end of list, so there was no real buffer
overflow.
Nevertheless, changing the code not only fixes the error report, but also
reduces the size of smart_attributes and simplifies the for loops.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'hw/ide/core.c')
| -rw-r--r-- | hw/ide/core.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/hw/ide/core.c b/hw/ide/core.c index d65ef3d58d..d6fb69c634 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -53,8 +53,6 @@ static const int smart_attributes[][12] = { { 0x0c, 0x03, 0x00, 0x64, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, /* airflow-temperature-celsius */ { 190, 0x03, 0x00, 0x45, 0x45, 0x1f, 0x00, 0x1f, 0x1f, 0x00, 0x00, 0x32}, - /* end of list */ - { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} }; static int ide_handle_rw_error(IDEState *s, int error, int op); @@ -1468,9 +1466,7 @@ void ide_exec_cmd(IDEBus *bus, uint32_t val) case SMART_READ_THRESH: memset(s->io_buffer, 0, 0x200); s->io_buffer[0] = 0x01; /* smart struct version */ - for (n=0; n<30; n++) { - if (smart_attributes[n][0] == 0) - break; + for (n = 0; n < ARRAY_SIZE(smart_attributes); n++) { s->io_buffer[2+0+(n*12)] = smart_attributes[n][0]; s->io_buffer[2+1+(n*12)] = smart_attributes[n][11]; } @@ -1484,10 +1480,7 @@ void ide_exec_cmd(IDEBus *bus, uint32_t val) case SMART_READ_DATA: memset(s->io_buffer, 0, 0x200); s->io_buffer[0] = 0x01; /* smart struct version */ - for (n=0; n<30; n++) { - if (smart_attributes[n][0] == 0) { - break; - } + for (n = 0; n < ARRAY_SIZE(smart_attributes); n++) { int i; for(i = 0; i < 11; i++) { s->io_buffer[2+i+(n*12)] = smart_attributes[n][i]; |