RESOLVED FIXED 183242
Crash when updating cache entry after validation in app that uses class A file protection 
https://bugs.webkit.org/show_bug.cgi?id=183242
Summary Crash when updating cache entry after validation in app that uses class A fil...
Antti Koivisto
Reported 2018-03-01 05:30:45 PST
We have network process crashes with some apps when trying to update cache entry after validation: Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Subtype: unknown at 0x0000000106d70000 VM Region Info: 0x106d70000 is in 0x106d70000-0x106da0000; bytes after start: 0 bytes before end: 196607 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL MALLOC_LARGE 0000000106d5c000-0000000106d70000 [ 80K] rw-/rwx SM=PRV ---> mapped file 0000000106d70000-0000000106da0000 [ 192K] r--/rw- SM=COW MALLOC_LARGE 0000000106da0000-0000000106db4000 [ 80K] rw-/rwx SM=PRV Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed ↩: 0 libsystem_platform.dylib 0x0000000181064a00 _platform_memmove + 48 1 WebCore 0x000000018ad73e70 WebCore::SharedBuffer::append(char const*, unsigned long) + 148 (Vector.h:159) 2 WebCore 0x000000018ad73fdc WebCore::SharedBuffer::SharedBuffer(unsigned char const*, unsigned long) + 52 (SharedBuffer.cpp:47) 3 WebKit 0x000000019157fa1c WebKit::NetworkCache::Entry::initializeBufferFromStorageRecord() const + 160 (SharedBuffer.h:59) 4 WebKit 0x000000019157faa4 WebKit::NetworkCache::Entry::buffer() const + 32 (NetworkCacheEntry.cpp:176) 5 WebKit 0x000000019157bb88 WebKit::NetworkCache::Cache::update(WebCore::ResourceRequest const&, std::__1::pair<unsigned long long, unsigned long long> const&, WebKit::NetworkCache::Entry const&, WebCore::ResourceResponse const&) + 124 (NetworkCache.cpp:477) 6 WebKit 0x00000001915cbc78 WebKit::NetworkResourceLoader::didReceiveResponse(WebCore::ResourceResponse&&) + 460 (NetworkResourceLoader.cpp:337) 7 WebKit 0x00000001915b87a0 WebKit::NetworkLoad::notifyDidReceiveResponse(WebCore::ResourceResponse&&, WTF::CompletionHandler<void (WebCore::PolicyAction)>&&) + 88 (NetworkLoad.cpp:255) 8 WebKit 0x00000001915b0fec WebKit::NetworkDataTask::didReceiveResponse(WebCore::ResourceResponse&&, WTF::CompletionHandler<void (WebCore::PolicyAction)>&&) + 344 (NetworkDataTask.cpp:112) 9 WebKit 0x00000001915d8714 -[WKNetworkSessionDelegate URLSession:dataTask:didReceiveResponse:completionHandler:] + 304 (NetworkSessionCocoa.mm:481) They are caused by protection class A files becoming inaccessible after device is locked.
Attachments
patch (2.37 KB, patch)
2018-03-01 05:47 PST, Antti Koivisto 		no flags
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Antti Koivisto
Comment 1 2018-03-01 05:31:13 PST
<rdar://problem/33289058>
Antti Koivisto
Comment 2 2018-03-01 05:47:38 PST
Created attachment 334809 [details] patch
WebKit Commit Bot
Comment 3 2018-03-01 09:11:38 PST
Comment on attachment 334809 [details] patch Clearing flags on attachment: 334809 Committed r229134: <https://trac.webkit.org/changeset/229134>
WebKit Commit Bot
Comment 4 2018-03-01 09:11:39 PST
All reviewed patches have been landed. Closing bug.
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