119297 2013-07-30 18:02:33 -0700 DHTML drag can result in a null-deref under WebDragClient::startDrag 2013-08-30 02:56:50 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 thorton thorton buildbot dtrebbien enrica rniwa oldest_to_newest 913121 0 thorton 2013-07-30 18:02:33 -0700 WebDragClient::startDrag's convertImageToBitmap will happily call createGraphicsContext on a null ShareableBitmap. It shouldn't do this, because the ShareableBitmap can be null for a variety of reasons. In addition, FrameSnapshottingMac::snapshotDragImage will happily waste time "painting" a 0x0 image, which it will then return and will eventually make its way to WebDragClient::startDrag, which will try to turn it into a ShareableBitmap and assert or crash because it has no size. <rdar://problem/14213012> 913122 1 207791 thorton 2013-07-30 18:07:31 -0700 Created attachment 207791 wrong version This one should be easy to test. 913128 2 207791 buildbot 2013-07-30 18:35:08 -0700 Comment on attachment 207791 wrong version Attachment 207791 did not pass mac-wk2-ews (mac-wk2): Output: http://webkit-queues.appspot.com/results/1292500 913130 3 207791 buildbot 2013-07-30 18:48:15 -0700 Comment on attachment 207791 wrong version Attachment 207791 did not pass mac-ews (mac): Output: http://webkit-queues.appspot.com/results/1288620 913142 4 207798 thorton 2013-07-30 19:26:42 -0700 Created attachment 207798 patch 913199 5 thorton 2013-07-30 22:56:41 -0700 http://trac.webkit.org/changeset/153511 922863 6 thorton 2013-08-30 02:56:50 -0700 *** Bug 119027 has been marked as a duplicate of this bug. *** 207791 2013-07-30 18:07:31 -0700 2013-07-30 19:26:42 -0700 wrong version prelim.diff text/plain 3071 thorton ZGlmZiAtLWdpdCBhL1NvdXJjZS9XZWJDb3JlL0NoYW5nZUxvZyBiL1NvdXJjZS9XZWJDb3JlL0No YW5nZUxvZwppbmRleCBjMTkzZTA1Li4xZmE4MjY0IDEwMDY0NAotLS0gYS9Tb3VyY2UvV2ViQ29y ZS9DaGFuZ2VMb2cKKysrIGIvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCkBAIC0xLDMgKzEsMTgg QEAKKzIwMTMtMDctMzAgIFRpbSBIb3J0b24gIDx0aW1vdGh5X2hvcnRvbkBhcHBsZS5jb20+CisK KyAgICAgICAgREhUTUwgZHJhZyBjYW4gcmVzdWx0IGluIGEgbnVsbC1kZXJlZiB1bmRlciBXZWJE cmFnQ2xpZW50OjpzdGFydERyYWcKKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hv d19idWcuY2dpP2lkPTExOTI5NworICAgICAgICA8cmRhcjovL3Byb2JsZW0vMTQyMTMwMTI+CisK KyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BTISkuCisKKyAgICAgICAgTm8gbmV3IHRl c3RzIChZRVQhKS4KKworICAgICAgICAqIHBhZ2UvbWFjL0ZyYW1lU25hcHNob3R0aW5nTWFjLm1t OgorICAgICAgICAoV2ViQ29yZTo6c25hcHNob3REcmFnSW1hZ2UpOgorICAgICAgICBXZSBzaG91 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