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Take care to avoid integer overflow when doing the initial page cache

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allocation with an excessively large cache_size setting.

FossilOrigin-Name: 4d66ac98deaa85218be7ff0eb254f78b96d8e8d4
This commit is contained in:
drh 2016-10-13 12:56:18 +00:00
parent c436a03d02
commit 989412a1cf
3 changed files with 8 additions and 8 deletions
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12
manifest
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@ -1,5 +1,5 @@
C Avoid\sreading\sthe\s-1-th\selement\sof\san\sarray\sin\sthe\squery\splanner.\s\sFix\sto\sa\nbug\sintroduced\sby\scheck-in\s[8e2b25f9b8a7]\sfrom\searlier\stoday.\s\sCuriously,\nthe\sproblem\sonly\sappeared\son\s32-bit\ssystems.
D 2016-10-12T18:55:53.185
C Take\scare\sto\savoid\sinteger\soverflow\swhen\sdoing\sthe\sinitial\spage\scache\nallocation\swith\san\sexcessively\slarge\scache_size\ssetting.
D 2016-10-13T12:56:18.996
F Makefile.in 6fd48ffcf7c2deea7499062d1f3747f986c19678
F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
F Makefile.msc 5151cc64c4c05f3455f4f692ad11410a810d937f
@ -378,7 +378,7 @@ F src/pager.h 966d2769e76ae347c8a32c4165faf6e6cb64546d
F src/parse.y 0338f906b61e311c2b7e11a3f89b0092c780b664
F src/pcache.c 5ff2a08f76a9c1b22f43eb063b7068fb085465ac
F src/pcache.h 2cedcd8407eb23017d92790b112186886e179490
F src/pcache1.c 4bb7a6a5300c67d0b033d25adb509c120c03e812
F src/pcache1.c e3967219b2a92b9edcb9324a4ba75009090d3953
F src/pragma.c d932ba278654617cdd281f88a790a3185fca7c44
F src/pragma.h 64c78a648751b9f4f297276c4eb7507b14b4628c
F src/prepare.c b1140c3d0cf59bc85ace00ce363153041b424b7a
@ -1525,7 +1525,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P e87d02d289a2016ea3ee074e914b07a8ac22b21f
R 347ceac05d5e830be9b0b453b9055752
P 443913d582bcd953d85159047541592e2f68ade3
R a065c821855a0dd84a6e1c87c8d5ef05
U drh
Z f6a48b076f4d91846fe2072e2532d39d
Z fa9255d8df284358f598506788fc36f9

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@ -1 +1 @@
443913d582bcd953d85159047541592e2f68ade3
4d66ac98deaa85218be7ff0eb254f78b96d8e8d4

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src/pcache1.c
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@ -279,7 +279,7 @@ static int pcache1InitBulk(PCache1 *pCache){
szBulk = -1024 * (i64)pcache1.nInitPage;
}
if( szBulk > pCache->szAlloc*(i64)pCache->nMax ){
szBulk = pCache->szAlloc*pCache->nMax;
szBulk = pCache->szAlloc*(i64)pCache->nMax;
}
zBulk = pCache->pBulk = sqlite3Malloc( szBulk );
sqlite3EndBenignMalloc();