112322 2013-03-13 23:54:08 -0700 Crash at RenderStyle::inheritFrom reported by fuzzer 2013-03-15 01:26:40 -0700 1 1 1 Unclassified WebKit CSS 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 97279 1 tasak tasak allan.jensen esprehn+autocc macpherson menard ojan.autocc webcomponents-bugzilla webkit.review.bot oldest_to_newest 855003 0 tasak 2013-03-13 23:54:08 -0700 Fuzzer Inferno_twister Job Type Linux_asan_chrome_mp Crash type UNKNOWN Crash address 0x000000000030 Crash state - crash stack - WebCore::RenderStyle::inheritFrom WebCore::StyleResolver::pseudoStyleForElement WebCore::RenderObject::getUncachedPseudoStyle Redzone 32 bytes 855004 1 tasak 2013-03-13 23:54:32 -0700 https://cluster-fuzz.appspot.com/testcase?key=159273524 855017 2 193080 tasak 2013-03-14 00:22:24 -0700 Created attachment 193080 Patch 855091 3 193080 mkwst 2013-03-14 02:42:56 -0700 Comment on attachment 193080 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=193080&action=review > Source/WebCore/css/StyleResolver.cpp:1180 > + RefPtr<RenderStyle> cloneForParent; Nit: You're only using this in the else block below. It would likely be possible to define it there rather than here in the outer scope. Actually, I'm not sure it's necessary at all, as you could call `state.setParentStyle(RenderStyle::clone(state.style()))` directly with little loss in clarity. 855097 4 193080 morrita 2013-03-14 02:51:04 -0700 Comment on attachment 193080 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=193080&action=review > Source/WebCore/css/StyleResolver.cpp:1188 > + state.setParentStyle(cloneForParent.get()); Why is this safe? It looks cloneForParent is gone after this function. How about just make State::m_parentStyle RefPtr? 855779 5 193251 tasak 2013-03-15 00:39:52 -0700 Created attachment 193251 Patch 855780 6 193080 tasak 2013-03-15 00:41:53 -0700 Comment on attachment 193080 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=193080&action=review Thank you for reviewing. >> Source/WebCore/css/StyleResolver.cpp:1180 >> + RefPtr<RenderStyle> cloneForParent; > > Nit: You're only using this in the else block below. It would likely be possible to define it there rather than here in the outer scope. Actually, I'm not sure it's necessary at all, as you could call `state.setParentStyle(RenderStyle::clone(state.style()))` directly with little loss in clarity. I see. Done. >> Source/WebCore/css/StyleResolver.cpp:1188 >> + state.setParentStyle(cloneForParent.get()); > > Why is this safe? It looks cloneForParent is gone after this function. > How about just make State::m_parentStyle RefPtr? Done. 855799 7 193251 webkit.review.bot 2013-03-15 01:26:37 -0700 Comment on attachment 193251 Patch Clearing flags on attachment: 193251 Committed r145885: <http://trac.webkit.org/changeset/145885> 855800 8 webkit.review.bot 2013-03-15 01:26:40 -0700 All reviewed patches have been landed. Closing bug. 193080 2013-03-14 00:22:24 -0700 2013-03-15 00:41:53 -0700 Patch bug-112322-20130314161820.patch text/plain 5123 tasak U3VidmVyc2lvbiBSZXZpc2lvbjogMTQ1Nzc1CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggYTQxZGRlYTE3YmNiMjk4 NjJjYzlmYzdjOGEyOGJkYWU3NGJlOWViZC4uOTg5ZTU1YTU2ZmY5NTE0ZDZhMjY4MmMxZjRmNTY1 ZTE0MjIzZmY4ZSAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDIyIEBACisyMDEzLTAzLTE0ICBUYWth c2hpIFNha2Ftb3RvICA8dGFzYWtAZ29vZ2xlLmNvbT4KKworICAgICAgICBDcmFzaCBhdCBSZW5k ZXJTdHlsZTo6aW5oZXJpdEZyb20gcmVwb3J0ZWQgYnkgZnV6emVyCisgICAgICAgIGh0dHBzOi8v YnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0xMTIzMjIKKworICAgICAgICBSZXZpZXdl ZCBieSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBwc2V1ZG9TdHlsZUZvckVsZW1lbnQgc2hv dWxkIGNoZWNrIHdoZXRoZXIgYSBwYXJlbnQgc3R5bGUgb2YgYSBnaXZlbgorICAgICAgICBlbGVt ZW50IGlzIGF2YWlsYWJsZSBvciBub3QuIElmIGEgZ2l2ZW4gZWxlbWVudCdzIHBhcmVudCBpcwor 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