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authorErkki Seppälä <erkki.seppala@vincit.fi>2017-04-06 14:09:19 +0200
committerMihai Moldovan <ionic@ionic.de>2017-04-06 14:09:19 +0200
commitc8a4e1e75c745c5c3ad947ba61c52cc5963d31dd (patch)
tree8e1693dd0cf20d8d73b3001558368fd2fe8b9ba6 /nx-X11/programs/Xserver/render/mipict.c
parent0d7b4c365808a7ce8abd8b1f1079b4a99d007c78 (diff)
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record: avoid crash when calling RecordFlushReplyBuffer recursively
Backported from X.Org: commit 0801afbd7c2c644c672b37f8463f1a0cbadebd2e Author: Erkki Seppälä <erkki.seppala@vincit.fi> Date: Thu Feb 10 15:35:14 2011 +0200 record: avoid crash when calling RecordFlushReplyBuffer recursively RecordFlushReplyBuffer can call itself recursively through WriteClient->CallCallbacks->_CallCallbacks->RecordFlushAllContexts when the recording client's buffer cannot be completely emptied in one WriteClient. When a such a recursion occurs, it will not be broken out of which results in segmentation fault when the stack is exhausted. This patch adds a counter (a flag, really) that guards against this situation, to break out of the recursion. One alternative to this change would be to change _CallCallbacks to check the corresponding counter before the callback loop, but that might affect existing behavior, which may be relied upon. Reviewed-by: Rami Ylimäki <rami.ylimaki@vincit.fi> Signed-off-by: Erkki Seppälä <erkki.seppala@vincit.fi> Signed-off-by: Keith Packard <keithp@keithp.com> Backported-to-NX-by: Mihai Moldovan <ionic@ionic.de> Fixes: ArcticaProject/nx-libs#417.
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