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SCP: Coverity inspired changes

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This commit is contained in:
Mark Pizzolato 2022-03-06 02:11:57 -08:00
parent 87597ea7f4
commit 06c696385f
4 changed files with 51 additions and 27 deletions
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57
sim_disk.c
View file

@ -540,9 +540,9 @@ for (dev = 0; (dptr = sim_devices[dev]) != NULL; dev++) {
set_cmd (0, cmd);
sim_show_message = saved_sim_show_message;
}
}
if (count == 0)
return sim_messagef (SCPE_ARG, "No disk devices support autosizing\n");
}
sim_disk_no_autosize = flag;
return SCPE_OK;
}
@ -2257,6 +2257,7 @@ switch (DK_GET_FMT (uptr)) { /* case on format */
memset (f->CreationTime, 0, sizeof (f->CreationTime));
strlcpy ((char*)f->CreationTime, ctime (&creation_time), sizeof (f->CreationTime));
container_size = sim_vhd_disk_size (uptr->fileref);
if ((f->SectorCount != 0) && (NtoHl (f->SectorSize) <= 65536)) /* Range check for Coverity sake */
f->SectorCount = NtoHl ((uint32)(container_size / NtoHl (f->SectorSize)));
container_size += sizeof (*f); /* Adjust since it is removed below */
f->AccessFormat = DKUF_F_VHD;
@ -2323,7 +2324,8 @@ if ((dptr = find_dev_from_unit (uptr)) == NULL)
return SCPE_NOATT;
if (uptr->flags & UNIT_RO)
return SCPE_RO;
sim_stat (uptr->filename, &statb);
if (sim_stat (uptr->filename, &statb))
memset (&statb, 0, sizeof (statb));
f = (struct simh_disk_footer *)calloc (1, sizeof (*f));
f->AccessFormat = DK_GET_FMT (uptr);
total_sectors = (((t_offset)uptr->capac) * ctx->capac_factor * ((dptr->flags & DEV_SECTORS) ? 512 : 1)) / ctx->sector_size;
@ -2395,7 +2397,8 @@ footer_highwater = (((t_offset)NtoHl (f->Highwater[0])) << 32) | ((t_offset)NtoH
if (ctx->highwater <= footer_highwater)
return SCPE_OK;
sim_stat (uptr->filename, &statb);
if (sim_stat (uptr->filename, &statb))
memset (&statb, 0, sizeof (statb));
total_sectors = (((t_offset)uptr->capac) * ctx->capac_factor * ((dptr->flags & DEV_SECTORS) ? 512 : 1)) / ctx->sector_size;
highwater = ctx->highwater;
f->Highwater[0] = NtoHl ((uint32)(highwater >> 32));
@ -3185,7 +3188,7 @@ if (uptr->flags & UNIT_BUFABLE) { /* buffer in memory? */
}
}
sim_messagef (SCPE_OK, "%s: buffering file in memory\n", sim_uname (uptr));
r = sim_disk_rdsect (uptr, 0, uptr->filebuf, &sectsread, (t_seccnt)(ctx->container_size / ctx->sector_size));
r = sim_disk_rdsect (uptr, 0, (uint8 *)uptr->filebuf, &sectsread, (t_seccnt)(ctx->container_size / ctx->sector_size));
if (r != SCPE_OK)
return sim_disk_detach (uptr);
uptr->hwmark = (sectsread * ctx->sector_size) / ctx->xfer_element_size;
@ -3239,7 +3242,7 @@ if ((uptr->flags & UNIT_BUF) && (uptr->filebuf)) {
if (((uptr->flags & UNIT_RO) == 0) &&
(memcmp (uptr->filebuf, uptr->filebuf2, (size_t)ctx->container_size) != 0)) {
sim_messagef (SCPE_OK, "%s: writing buffer to file: %s\n", sim_uname (uptr), uptr->filename);
sim_disk_wrsect (uptr, 0, uptr->filebuf, NULL, (cap + ctx->sector_size - 1) / ctx->sector_size);
sim_disk_wrsect (uptr, 0, (uint8 *)uptr->filebuf, NULL, (cap + ctx->sector_size - 1) / ctx->sector_size);
}
uptr->flags = uptr->flags & ~UNIT_BUF;
}
@ -5990,6 +5993,7 @@ ReadVirtualDisk(VHDHANDLE hVHD,
uint32 TotalBytesRead = 0;
uint32 BitMapBytes;
uint32 BitMapSectors;
uint32 DynamicBlockSize;
t_stat r = SCPE_OK;
if (BytesRead)
@ -6014,15 +6018,21 @@ if (NtoHl (hVHD->Footer.DiskType) == VHD_DT_Fixed) {
return r;
}
/* We are now dealing with a Dynamically expanding or differencing disk */
BitMapBytes = (7+(NtoHl (hVHD->Dynamic.BlockSize)/VHD_Internal_SectorSize))/8;
DynamicBlockSize = NtoHl (hVHD->Dynamic.BlockSize);
if ((DynamicBlockSize == 0) ||
((DynamicBlockSize & (DynamicBlockSize - 1)) != 0)) {
errno = ERANGE;
return SCPE_IOERR;
}
BitMapBytes = (7+(DynamicBlockSize / VHD_Internal_SectorSize))/8;
BitMapSectors = (BitMapBytes+VHD_Internal_SectorSize-1)/VHD_Internal_SectorSize;
while (BytesToRead && (r == SCPE_OK)) {
uint32 BlockNumber = (uint32)(Offset / NtoHl (hVHD->Dynamic.BlockSize));
uint32 BlockNumber = (uint32)(Offset / DynamicBlockSize);
uint32 BytesInRead = BytesToRead;
uint32 BytesThisRead = 0;
if (BlockNumber != (Offset + BytesToRead) / NtoHl (hVHD->Dynamic.BlockSize))
BytesInRead = (uint32)(((BlockNumber + 1) * NtoHl (hVHD->Dynamic.BlockSize)) - Offset);
if (BlockNumber != (Offset + BytesToRead) / DynamicBlockSize)
BytesInRead = (uint32)(((BlockNumber + 1) * DynamicBlockSize) - Offset);
if (hVHD->BAT[BlockNumber] == VHD_BAT_FREE_ENTRY) {
if (!hVHD->Parent) {
memset (buf, 0, BytesInRead);
@ -6038,7 +6048,7 @@ while (BytesToRead && (r == SCPE_OK)) {
}
}
else {
uint64 BlockOffset = VHD_Internal_SectorSize * ((uint64)(NtoHl (hVHD->BAT[BlockNumber]) + BitMapSectors)) + (Offset % NtoHl (hVHD->Dynamic.BlockSize));
uint64 BlockOffset = VHD_Internal_SectorSize * ((uint64)(NtoHl (hVHD->BAT[BlockNumber]) + BitMapSectors)) + (Offset % DynamicBlockSize);
if (ReadFilePosition(hVHD->File,
buf,
@ -6114,6 +6124,7 @@ WriteVirtualDisk(VHDHANDLE hVHD,
uint32 TotalBytesWritten = 0;
uint32 BitMapBytes;
uint32 BitMapSectors;
uint32 DynamicBlockSize;
t_stat r = SCPE_OK;
if (BytesWritten)
@ -6138,10 +6149,16 @@ if (NtoHl(hVHD->Footer.DiskType) == VHD_DT_Fixed) {
return r;
}
/* We are now dealing with a Dynamically expanding or differencing disk */
BitMapBytes = (7 + (NtoHl(hVHD->Dynamic.BlockSize) / VHD_Internal_SectorSize)) / 8;
DynamicBlockSize = NtoHl (hVHD->Dynamic.BlockSize);
if ((DynamicBlockSize == 0) ||
((DynamicBlockSize & (DynamicBlockSize - 1)) != 0)) {
errno = ERANGE;
return SCPE_IOERR;
}
BitMapBytes = (7 + (DynamicBlockSize / VHD_Internal_SectorSize)) / 8;
BitMapSectors = (BitMapBytes + VHD_Internal_SectorSize - 1) / VHD_Internal_SectorSize;
while (BytesToWrite && (r == SCPE_OK)) {
uint32 BlockNumber = (uint32)(Offset / NtoHl(hVHD->Dynamic.BlockSize));
uint32 BlockNumber = (uint32)(Offset / DynamicBlockSize);
uint32 BytesInWrite = BytesToWrite;
uint32 BytesThisWrite = 0;
@ -6149,7 +6166,7 @@ while (BytesToWrite && (r == SCPE_OK)) {
return SCPE_EOF;
}
if (BlockNumber != (Offset + BytesToWrite) / NtoHl (hVHD->Dynamic.BlockSize))
BytesInWrite = (uint32)(((BlockNumber + 1) * NtoHl(hVHD->Dynamic.BlockSize)) - Offset);
BytesInWrite = (uint32)(((BlockNumber + 1) * DynamicBlockSize) - Offset);
if (hVHD->BAT[BlockNumber] == VHD_BAT_FREE_ENTRY) {
uint8 *BitMap = NULL;
uint32 BitMapBufferSize = VHD_DATA_BLOCK_ALIGNMENT;
@ -6170,7 +6187,7 @@ while (BytesToWrite && (r == SCPE_OK)) {
return SCPE_IOERR;
if ((BitMapSectors * VHD_Internal_SectorSize) > BitMapBufferSize)
BitMapBufferSize = BitMapSectors * VHD_Internal_SectorSize;
BitMapBuffer = (uint8 *)calloc(1, BitMapBufferSize + NtoHl(hVHD->Dynamic.BlockSize));
BitMapBuffer = (uint8 *)calloc(1, BitMapBufferSize + DynamicBlockSize);
if (BitMapBufferSize > BitMapSectors * VHD_Internal_SectorSize)
BitMap = BitMapBuffer + BitMapBufferSize - BitMapBytes;
else
@ -6181,7 +6198,7 @@ while (BytesToWrite && (r == SCPE_OK)) {
{ // Already aligned, so use padded BitMapBuffer
if (WriteFilePosition(hVHD->File,
BitMapBuffer,
BitMapBufferSize + NtoHl(hVHD->Dynamic.BlockSize),
BitMapBufferSize + DynamicBlockSize,
NULL,
BlockOffset)) {
free (BitMapBuffer);
@ -6200,7 +6217,7 @@ while (BytesToWrite && (r == SCPE_OK)) {
BlockOffset -= BitMapSectors * VHD_Internal_SectorSize;
if (WriteFilePosition(hVHD->File,
BitMap,
(BitMapSectors * VHD_Internal_SectorSize) + NtoHl(hVHD->Dynamic.BlockSize),
(BitMapSectors * VHD_Internal_SectorSize) + DynamicBlockSize,
NULL,
BlockOffset)) {
free (BitMapBuffer);
@ -6213,7 +6230,7 @@ while (BytesToWrite && (r == SCPE_OK)) {
/* the BAT block address is the beginning of the block bitmap */
BlockOffset -= BitMapSectors * VHD_Internal_SectorSize;
hVHD->BAT[BlockNumber] = NtoHl((uint32)(BlockOffset / VHD_Internal_SectorSize));
BlockOffset += (BitMapSectors * VHD_Internal_SectorSize) + NtoHl(hVHD->Dynamic.BlockSize);
BlockOffset += (BitMapSectors * VHD_Internal_SectorSize) + DynamicBlockSize;
if (WriteFilePosition(hVHD->File,
&hVHD->Footer,
sizeof(hVHD->Footer),
@ -6270,7 +6287,7 @@ Fatal_IO_Error:
r = SCPE_IOERR;
}
else {
uint64 BlockOffset = VHD_Internal_SectorSize * ((uint64)(NtoHl(hVHD->BAT[BlockNumber]) + BitMapSectors)) + (Offset % NtoHl(hVHD->Dynamic.BlockSize));
uint64 BlockOffset = VHD_Internal_SectorSize * ((uint64)(NtoHl(hVHD->BAT[BlockNumber]) + BitMapSectors)) + (Offset % DynamicBlockSize);
if (WriteFilePosition(hVHD->File,
buf,
@ -6445,6 +6462,8 @@ if (info->flag) { /* zap type */
size_t sector_size = NtoHl (f->SectorSize);
t_offset highwater = (((t_offset)NtoHl (f->Highwater[0])) << 32) | ((t_offset)NtoHl (f->Highwater[1]));
if (sector_size > 16384) /* arbitray upper limit */
sector_size = 16384;
/* determine whole sectors in original container size */
/* By default we chop off the disk footer and trailing */
/* zero sectors added since the footer was appended that */
@ -6685,10 +6704,10 @@ if (!(uptr->flags & UNIT_RO)) { /* Only test drives open Read/Write - Read Only
r = SCPE_IERR;
}
}
}
free (c->data);
free (c->wbitmap);
free (c);
}
if (r == SCPE_OK) {
char *filename = strdup (uptr->filename);

5
sim_fio.c
View file

@ -379,10 +379,13 @@ filelist[listcount + 1] = NULL;
char **sim_get_filelist (const char *filename)
{
t_stat r;
char **filelist = NULL;
sim_dir_scan (filename, _sim_filelist_entry, &filelist);
r = sim_dir_scan (filename, _sim_filelist_entry, &filelist);
if (r == SCPE_OK)
return filelist;
return NULL;
}
void sim_free_filelist (char ***pfilelist)

2
sim_sock.c
View file

@ -750,7 +750,7 @@ while ((*acl != '\0') && !done) {
rule[cc - (acl + 1)] = '\0';
}
else {
if (strlen (acl) > sizeof (rule))
if (strlen (acl) >= sizeof (rule))
break; /* Too big - error */
strcpy (rule, acl + 1);
}

4
sim_tmxr.c
View file

@ -1144,13 +1144,15 @@ if (mp->master) {
if (sim_addr_acl_check (address, mp->acl) != 0) {
tmxr_debug_connect (mp, "tmxr_poll_conn() - Connection Specifically rejected by ACL");
sim_close_sock (newsock);
newsock = INVALID_SOCKET;
free (address);
++mp->acl_rejected_sessions;
}
else
++mp->acl_accepted_sessions;
}
else {
if (newsock != INVALID_SOCKET) {
for (j = 0; j < mp->lines; j++, i++) { /* find next avail line */
if (op && (*op >= 0) && (*op < mp->lines)) /* order list present and valid? */
i = *op++; /* get next line in list to try */