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Avoid the possibility of integer overflow on the --pagecache option to

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the CLI. See [forum:10a2892377|forum post 10a2892377]

FossilOrigin-Name: d3d13df31a97648f952beb2e1a783f947a80ec843227985ad9ebd14452d2f654
This commit is contained in:
drh
2020-09-28 13:34:05 +00:00
parent 273ee15121
commit f573b4fb94
3 changed files with 14 additions and 11 deletions
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9
src/shell.c.in
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@@ -10925,11 +10925,14 @@ int SQLITE_CDECL wmain(int argc, wchar_t **wargv){
(void)cmdline_option_value(argc, argv, ++i);
#endif
}else if( strcmp(z,"-pagecache")==0 ){
int n, sz;
sz = (int)integerValue(cmdline_option_value(argc,argv,++i));
sqlite3_int64 n, sz;
sz = integerValue(cmdline_option_value(argc,argv,++i));
if( sz>70000 ) sz = 70000;
if( sz<0 ) sz = 0;
n = (int)integerValue(cmdline_option_value(argc,argv,++i));
n = integerValue(cmdline_option_value(argc,argv,++i));
if( sz>0 && n>0 && 0xffffffffffffLL/sz<n ){
n = 0xffffffffffffLL/sz;
}
sqlite3_config(SQLITE_CONFIG_PAGECACHE,
(n>0 && sz>0) ? malloc(n*sz) : 0, sz, n);
data.shellFlgs |= SHFLG_Pagecache;