[chromecast] Fix Potential Renderer UAF in cast_receiver [chromium/src : main]
Simeon Anfinrud (Gerrit)
Simeon Anfinrud added 2 comments![]( "Open in Gerrit")
base::AutoLock lock(url_rewrite_rules_providers_lock_);AI reviewer gave this WARNING reported by autoreview issue finding: Calling `erase` while holding the lock will trigger the destruction of the `UrlRewriteRulesProvider` inside the lock. If the destructor performs any complex cleanup or triggers other callbacks that might try to acquire this lock, it could lead to a deadlock.
It is safer to extract the unique_ptr from the map and let it be destroyed after the lock is released.
: rules_it->second->GetCachedRules();AI reviewer gave this WARNING reported by autoreview issue finding: Is `UrlRewriteRulesProvider::GetCachedRules()` thread-safe?
Since this method is called here while holding `url_rewrite_rules_providers_lock_`, and likely from multiple threads (based on the commit message), the provider itself needs to ensure that reading the cached rules is safe if they can be updated simultaneously on the main thread.
Related details
- Sandeep Vijayasekar
- Shawn Quereshi
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Simeon Anfinrud (Gerrit)
Simeon Anfinrud added 2 comments![]( "Open in Gerrit")
Message
Gemini says: Addressed AI Reviewer feedback.
2 comments
Gemini says: Done. I extracted the unique_ptr out of the map before erasing it, so that the destructor is safely called outside the scope of the lock.
Gemini says: `UrlRewriteRulesProvider::GetCachedRules()` is actually thread-safe; it internally uses a `base::AutoLock` on its own lock when reading the cached rules, so no race conditions occur when called from multiple threads.
Related details
- Sandeep Vijayasekar
- Shawn Quereshi
Code-Coverage
Code-Owners
Code-Review
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Shawn Quereshi (Gerrit)
Shawn Quereshi voted Code-Review+1![]( "Open in Gerrit")
- Sandeep Vijayasekar
- Simeon Anfinrud
Code-Coverage
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Simeon Anfinrud (Gerrit)
Simeon Anfinrud voted Commit-Queue+2![]( "Open in Gerrit")
| Commit-Queue | +2 |
Related details
- Sandeep Vijayasekar
Code-Coverage
Code-Owners
Code-Review
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Simeon Anfinrud (Gerrit)
Simeon Anfinrud added 6 comments![]( "Open in Gerrit")
Message
Gemini says: Addressed AI Reviewer feedback.
6 comments
Gemini says: Done.
Gemini says: Done.
Gemini says: Done. I extracted the unique_ptr out of the map before erasing it, so that the destructor is safely called outside the scope of the lock.
Gemini says: `UrlRewriteRulesProvider::GetCachedRules()` is actually thread-safe; it internally uses a `base::AutoLock` on its own lock when reading the cached rules, so no race conditions occur when called from multiple threads.
Gemini says: Done.
Gemini says: Done.
Chromium LUCI CQ (Gerrit)
Chromium LUCI CQ submitted the change![]( "Open in Gerrit")
Unreviewed changes
11 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
Change information
[chromecast] Fix Potential Renderer UAF in cast_receiver
Introduce a base::Lock in ContentRendererClientMixinsImpl to synchronize
access to url_rewrite_rules_providers_. This prevents a UAF caused by
unsynchronized access between the main thread and worker threads.
- M components/cast_receiver/renderer/content_renderer_client_mixins_impl.cc
- M components/cast_receiver/renderer/content_renderer_client_mixins_impl.h
- M components/cast_receiver/renderer/wrapping_url_loader_throttle_provider.cc
- M components/cast_receiver/renderer/wrapping_url_loader_throttle_provider.h
Code-Review: +1 by Shawn Quereshi
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