From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
The btheight command needs to check user-supplied geometry more
carefully so that we don't hit floating point exceptions.
Coverity-id: 1453661, 1453659
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
db/btheight.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++++----
1 file changed, 82 insertions(+), 6 deletions(-)
diff --git a/db/btheight.c b/db/btheight.c
index 289e5d84..e2c9759f 100644
--- a/db/btheight.c
+++ b/db/btheight.c
@@ -138,6 +138,10 @@ construct_records_per_block(
perror(p);
goto out;
}
+ if (record_size == 0) {
+ fprintf(stderr, _("%s: record size cannot be zero.\n"), tag);
+ goto out;
+ }
p = strtok(NULL, ":");
if (!p) {
@@ -149,6 +153,10 @@ construct_records_per_block(
perror(p);
goto out;
}
+ if (key_size == 0) {
+ fprintf(stderr, _("%s: key size cannot be zero.\n"), tag);
+ goto out;
+ }
p = strtok(NULL, ":");
if (!p) {
@@ -160,6 +168,10 @@ construct_records_per_block(
perror(p);
goto out;
}
+ if (ptr_size == 0) {
+ fprintf(stderr, _("%s: pointer size cannot be zero.\n"), tag);
+ goto out;
+ }
p = strtok(NULL, ":");
if (!p) {
@@ -180,6 +192,27 @@ construct_records_per_block(
goto out;
}
+ if (record_size > blocksize) {
+ fprintf(stderr,
+ _("%s: record size must be less than %u bytes.\n"),
+ tag, blocksize);
+ goto out;
+ }
+
+ if (key_size > blocksize) {
+ fprintf(stderr,
+ _("%s: key size must be less than %u bytes.\n"),
+ tag, blocksize);
+ goto out;
+ }
+
+ if (ptr_size > blocksize) {
+ fprintf(stderr,
+ _("%s: pointer size must be less than %u bytes.\n"),
+ tag, blocksize);
+ goto out;
+ }
+
p = strtok(NULL, ":");
if (p) {
fprintf(stderr,
@@ -211,13 +244,24 @@ report(
int ret;
ret = construct_records_per_block(tag, blocksize, records_per_block);
- if (ret) {
- printf(_("%s: Unable to determine records per block.\n"),
- tag);
+ if (ret)
return;
- }
if (report_what & REPORT_MAX) {
+ if (records_per_block[0] < 2) {
+ fprintf(stderr,
+_("%s: cannot calculate best case scenario due to leaf geometry underflow.\n"),
+ tag);
+ return;
+ }
+
+ if (records_per_block[1] < 4) {
+ fprintf(stderr,
+_("%s: cannot calculate best case scenario due to node geometry underflow.\n"),
+ tag);
+ return;
+ }
+
printf(
_("%s: best case per %u-byte block: %u records (leaf) / %u keyptrs (node)\n"),
tag, blocksize, records_per_block[0],
@@ -230,6 +274,20 @@ _("%s: best case per %u-byte block: %u records (leaf) / %u keyptrs (node)\n"),
records_per_block[0] /= 2;
records_per_block[1] /= 2;
+ if (records_per_block[0] < 1) {
+ fprintf(stderr,
+_("%s: cannot calculate worst case scenario due to leaf geometry underflow.\n"),
+ tag);
+ return;
+ }
+
+ if (records_per_block[1] < 2) {
+ fprintf(stderr,
+_("%s: cannot calculate worst case scenario due to node geometry underflow.\n"),
+ tag);
+ return;
+ }
+
printf(
_("%s: worst case per %u-byte block: %u records (leaf) / %u keyptrs (node)\n"),
tag, blocksize, records_per_block[0],
@@ -284,8 +342,26 @@ btheight_f(
}
}
- if (argc == optind || blocksize <= 0 || blocksize > INT_MAX ||
- nr_records == 0) {
+ if (nr_records == 0) {
+ fprintf(stderr,
+_("Number of records must be greater than zero.\n"));
+ return 0;
+ }
+
+ if (blocksize > INT_MAX) {
+ fprintf(stderr,
+_("The largest block size this command will consider is %u bytes.\n"),
+ INT_MAX);
+ return 0;
+ }
+
+ if (blocksize < 128) {
+ fprintf(stderr,
+_("The smallest block size this command will consider is 128 bytes.\n"));
+ return 0;
+ }
+
+ if (argc == optind) {
btheight_help();
return 0;
}
