RESOLVED FIXED 182404
Fix crashes due to mishandling custom sections. 
https://bugs.webkit.org/show_bug.cgi?id=182404
Summary Fix crashes due to mishandling custom sections.
Keith Miller
Reported 2018-02-01 13:18:22 PST
Fix crashes due to mishandling custom sections.
Attachments
Patch (9.62 KB, patch)
2018-02-01 13:43 PST, Keith Miller 		no flags
DetailsFormatted DiffDiff
Patch for landing (9.71 KB, patch)
2018-02-01 15:22 PST, Keith Miller 		keith_miller: commit-queue+
DetailsFormatted DiffDiff
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.
Keith Miller
Comment 1 2018-02-01 13:43:30 PST
Created attachment 332906 [details] Patch
Keith Miller
Comment 2 2018-02-01 13:44:18 PST
rdar://problem/36935863
Saam Barati
Comment 3 2018-02-01 14:12:29 PST
Comment on attachment 332906 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=332906&action=review r=me > Source/JavaScriptCore/wasm/WasmModuleParser.cpp:58 > + // This is not really a known section extra space > Source/JavaScriptCore/wasm/WasmSections.h:55 > + // It's important that Begin is less than every other section number and that Custom is greater. > + // This only works because section numbers are currently monotonically increasing and we don't support > + // any custom sections. Also, Begin is not a real section but is used as a marker for validating the ordering > + // of sections. > + Begin = 0, static_assert please
JF Bastien
Comment 4 2018-02-01 14:14:00 PST
Comment on attachment 332906 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=332906&action=review r=me > Source/JavaScriptCore/wasm/WasmSections.h:53 > + // any custom sections. Also, Begin is not a real section but is used as a marker for validating the ordering We support the "name" custom section. > Source/JavaScriptCore/wasm/WasmSections.h:77 > + if (!sectionByte) Compare to static_cast<uint8_t>(Section::Custom) instead?
Keith Miller
Comment 5 2018-02-01 14:18:42 PST
Comment on attachment 332906 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=332906&action=review >> Source/JavaScriptCore/wasm/WasmSections.h:53 >> + // any custom sections. Also, Begin is not a real section but is used as a marker for validating the ordering > > We support the "name" custom section. Oh right, I'll change the comment. >> Source/JavaScriptCore/wasm/WasmSections.h:55 >> + Begin = 0, > > static_assert please What static assert are you looking for? Begin < Type? >> Source/JavaScriptCore/wasm/WasmSections.h:77 >> + if (!sectionByte) > > Compare to static_cast<uint8_t>(Section::Custom) instead? That would be incorrect...
Keith Miller
Comment 6 2018-02-01 15:22:45 PST
Created attachment 332914 [details] Patch for landing
Keith Miller
Comment 7 2018-02-01 20:30:42 PST
Committed r227994: <https://trac.webkit.org/changeset/227994>
Brent Fulgham
Comment 8 2018-05-01 08:22:59 PDT
*** Bug 182208 has been marked as a duplicate of this bug. ***
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