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openSUSE:Maintenance:10692
exim.openSUSE_Leap_15.1_Update
exim-CVE-2017-16943.patch
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File exim-CVE-2017-16943.patch of Package exim.openSUSE_Leap_15.1_Update
From 4e6ae6235c68de243b1c2419027472d7659aa2b4 Mon Sep 17 00:00:00 2001 From: Jeremy Harris <jgh146exb@wizmail.org> Date: Fri, 24 Nov 2017 20:22:33 +0000 Subject: [PATCH] Avoid release of store if there have been later allocations. Bug 2199 --- src/src/receive.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/src/src/receive.c b/src/src/receive.c index e7e518a..d9b5001 100644 --- a/src/receive.c +++ b/src/receive.c @@ -1810,8 +1810,8 @@ for (;;) (and sometimes lunatic messages can have ones that are 100s of K long) we call store_release() for strings that have been copied - if the string is at the start of a block (and therefore the only thing in it, because we aren't - doing any other gets), the block gets freed. We can only do this because we - know there are no other calls to store_get() going on. */ + doing any other gets), the block gets freed. We can only do this release if + there were no allocations since the once that we want to free. */ if (ptr >= header_size - 4) { @@ -1820,9 +1820,10 @@ for (;;) header_size *= 2; if (!store_extend(next->text, oldsize, header_size)) { + BOOL release_ok = store_last_get[store_pool] == next->text; uschar *newtext = store_get(header_size); memcpy(newtext, next->text, ptr); - store_release(next->text); + if (release_ok) store_release(next->text); next->text = newtext; } } -- 1.9.1
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