From 544cab7651100628ed290acc2a2fee394b7568aa Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Fri, 17 Mar 2017 22:51:28 +0000
Subject: [PATCH] Set a reasonable limit on the number of opcodes in a prepared
 statement for ossfuzz.c.  This should prevent timeouts in OSS-Fuzz when it
 generates totally unreasonable queries.

FossilOrigin-Name: f74899ed2c78019abb406432a74dcd42a0ff8d9add005f8544dc4a8905f232eb
---
 manifest       | 12 ++++++------
 manifest.uuid  |  2 +-
 test/ossfuzz.c |  3 +++
 3 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/manifest b/manifest
index db77af64f9..3396b9cc13 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Begin\senforcing\sthe\sSQLITE_LIMIT_VDBE_OP.\s\sThe\sdocumentation\swarned\sthat\sthis\nday\smight\scome.
-D 2017-03-17T22:50:16.704
+C Set\sa\sreasonable\slimit\son\sthe\snumber\sof\sopcodes\sin\sa\sprepared\sstatement\nfor\sossfuzz.c.\s\sThis\sshould\sprevent\stimeouts\sin\sOSS-Fuzz\swhen\sit\sgenerates\ntotally\sunreasonable\squeries.
+D 2017-03-17T22:51:28.665
 F Makefile.in 1cc758ce3374a32425e4d130c2fe7b026b20de5b8843243de75f087c0a2661fb
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 1faf9f06aadc9284c212dea7bbc7c0dea7e8337f0287c81001eff500912c790a
@@ -1009,7 +1009,7 @@ F test/orderby7.test 3d1383d52ade5b9eb3a173b3147fdd296f0202da
 F test/orderby8.test 23ef1a5d72bd3adcc2f65561c654295d1b8047bd
 F test/orderby9.test 87fb9548debcc2cd141c5299002dd94672fa76a3
 F test/oserror.test b32dc34f2363ef18532e3a0a7358e3e7e321974f
-F test/ossfuzz.c 756ca4bede67ec22e3a700b1168bad767dc6fc69ede414c4ab87cfcfcceb4075
+F test/ossfuzz.c 8c4d62e156352ecb97eb868fcff20d828a279af67a1c1310779f63464d6f009f
 F test/ossshell.c 296ab63067841bd1b1e97b46a0b2af48ee7f69d50d1a723008bee12dd7122622
 F test/ovfl.test 199c482696defceacee8c8e0e0ef36da62726b2f
 F test/pager1.test 841868017e9dd3cb459b8d78862091a7d9cff21d
@@ -1566,7 +1566,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 626bdca98e0cd78ae873d97e75bb7d544ca18759c9f1e67f4adf03daca7fe5bf
-R 577cbf1218e05c6f890fd56d3bd8c3f1
+P ef5914617088cbf89bfae88f63ea959a07f02dff387ddc2b43948ad99c6a97b8
+R 3a60b2fbebe94ced9367e16b751bb1ee
 U drh
-Z db7430243d899e77772ca775a4ab8f59
+Z bc390a309335be50f7a4bf79ab7f90df
diff --git a/manifest.uuid b/manifest.uuid
index 0f60fb4ebb..e97c1e2b26 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-ef5914617088cbf89bfae88f63ea959a07f02dff387ddc2b43948ad99c6a97b8
\ No newline at end of file
+f74899ed2c78019abb406432a74dcd42a0ff8d9add005f8544dc4a8905f232eb
\ No newline at end of file
diff --git a/test/ossfuzz.c b/test/ossfuzz.c
index 6790d194d5..0c2b1320e4 100644
--- a/test/ossfuzz.c
+++ b/test/ossfuzz.c
@@ -121,6 +121,9 @@ int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   sqlite3_progress_handler(cx.db, 10, progress_handler, (void*)&cx);
 #endif
 
+  /* Set a limit on the maximum size of a prepared statement */
+  sqlite3_limit(cx.db, SQLITE_LIMIT_VDBE_OP, 25000);
+
   /* Bit 1 of the selector enables foreign key constraints */
   sqlite3_db_config(cx.db, SQLITE_DBCONFIG_ENABLE_FKEY, uSelector&1, &rc);
   uSelector >>= 1;