Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: de77e9322dad1b77de289f3853c1641d83db4d9e
https://github.com/WebKit/WebKit/commit/de77e9322dad1b77de289f3853c1641d83db4d9e
Author: Chris Dumez <[email protected]>
Date: 2026-04-15 (Wed, 15 Apr 2026)
Changed paths:
M Source/WebKit/WebProcess/WebProcess.cpp
Log Message:
-----------
Null deref in WebProcess::refreshIDBConnectionForWorkers() during WebPage
construction
https://bugs.webkit.org/show_bug.cgi?id=312364
rdar://174762356
Reviewed by Ryosuke Niwa.
WebProcess::createWebPage() uses HashMap::ensure() to insert and construct
the WebPage in one step. During the WebPage constructor,
WebSocketProvider triggers ensureNetworkProcessConnection(), which may call
refreshIDBConnectionForWorkers(). That function iterates m_pageMap and
dereferences each Ref<WebPage> via operator->(). However, the Ref<WebPage>
for the page being constructed is still in its zeroed hash-table-empty
state (m_ptr == nullptr) because HashMap::ensure()'s translate function
evaluates the functor before assigning the result to the slot. This causes
a null dereference at offset 0x38 (the m_page member within WebPage).
Fix this by deferring refreshIDBConnectionForWorkers() to the next run loop
turn, matching the existing pattern used for
synchronizeCORSDisablingPatternsWithNetworkProcess() a few lines above.
* Source/WebKit/WebProcess/WebProcess.cpp:
(WebKit::WebProcess::ensureNetworkProcessConnection):
Canonical link: https://commits.webkit.org/311278@main
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