[Webkit-unassigned] [Bug 176874] New: AddressSanitizer: stack-buffer-underflow in JSC::Probe::Page::Page

Wed Sep 13 13:05:43 PDT 2017

https://bugs.webkit.org/show_bug.cgi?id=176874

            Bug ID: 176874
           Summary: AddressSanitizer: stack-buffer-underflow in
                    JSC::Probe::Page::Page
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: hodovan at inf.u-szeged.hu
                CC: mark.lam at apple.com

Created attachment 320681

  --> https://bugs.webkit.org/attachment.cgi?id=320681&action=review

Test

Load the attached test with debug ASAN WebKitTestRunner:

Checked version: 35511bd
OS: macOS Sierra (10.12.6)

<audio controls="false" onstalled="this.getElementsByTagName('input').prototype.getElementsByTagName('td')"></audio>

Backtrace:

=================================================================
==11989==ERROR: AddressSanitizer: stack-buffer-underflow on address 0x7fff5da6ad00 at pc 0x0001021df9eb bp 0x7fff5da68ce0 sp 0x7fff5da684a0
READ of size 1024 at 0x7fff5da6ad00 thread T0
    #0 0x1021df9ea in __asan_memcpy (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.0.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib+0x419ea)
    #1 0x12ccae191 in JSC::Probe::Page::Page(void*) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2e77191)
    #2 0x12ccae1bc in JSC::Probe::Page::Page(void*) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2e771bc)
    #3 0x12ccaf3c8 in JSC::Probe::Stack::ensurePageFor(void*) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2e783c8)
    #4 0x12b4293c7 in JSC::Probe::Stack::pageFor(void*) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x15f23c7)
    #5 0x12b439e76 in void JSC::Probe::Stack::set<JSC::JSValue>(void*, JSC::JSValue) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x1602e76)
    #6 0x12b439c94 in void JSC::Probe::Frame::set<JSC::JSValue>(long, JSC::JSValue) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x1602c94)
    #7 0x12b42352b in void JSC::Probe::Frame::setOperand<JSC::JSValue>(int, JSC::JSValue) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x15ec52b)
    #8 0x12b41f895 in JSC::DFG::OSRExit::executeOSRExit(JSC::Probe::Context&) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x15e8895)
    #9 0x12ccac026 in JSC::Probe::executeProbe(JSC::Probe::State*) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2e75026)
    #10 0x12c8558ea in ctiMasmProbeTrampoline (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x2a1e8ea)
    #11 0x62f00000e3ff  (<unknown module>)

Address 0x7fff5da6ad00 is located in stack of thread T0 at offset 0 in frame
    #0 0x12c1fa55f in JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) (WebKit/WebKitBuild/Debug/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x23c355f)

  This frame has 5 object(s):
    [32, 40) 'retval' <== Memory access at offset 0 partially underflows this variable
    [64, 112) 'scope' <== Memory access at offset 0 partially underflows this variable
    [144, 168) 'agg.tmp' <== Memory access at offset 0 partially underflows this variable
    [208, 216) 'coerce' <== Memory access at offset 0 partially underflows this variable
    [240, 248) 'result' <== Memory access at offset 0 partially underflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
      (longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-underflow (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.0.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib+0x419ea) in __asan_memcpy
Shadow bytes around the buggy address:
  0x1fffebb4d550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1fffebb4d560: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1fffebb4d570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1fffebb4d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1fffebb4d590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x1fffebb4d5a0:[f1]f1 f1 f1 00 f2 f2 f2 00 00 00 00 00 00 f2 f2
  0x1fffebb4d5b0: f2 f2 00 00 00 f2 f2 f2 f2 f2 00 f2 f2 f2 00 f3
  0x1fffebb4d5c0: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
  0x1fffebb4d5d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1fffebb4d5e0: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
  0x1fffebb4d5f0: 00 f2 f2 f2 00 f2 f2 f2 00 00 00 00 00 00 f2 f2
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Heap right redzone:      fb
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack partial redzone:   f4
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==11989==ABORTING
#CRASHED - com.apple.WebKit.WebContent.Development (pid 11989)
LEAK: 1 WebProcessPool
LEAK: 1 WebPageProxy

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