Closed Bug 470804 Opened 15 years ago Closed 15 years ago

crash [@ NS_GetInnermostURI - nsScriptSecurityManager::CheckLoadURIWithPrincipal]


(Core :: Security: CAPS, defect)

Not set





(Reporter: wsmwk, Assigned: timeless)



(Keywords: crash, fixed1.9.1, topcrash, Whiteboard: [tb3needs])

Crash Data


(2 files)

topcrash 10 crasher for Thunderbird 3.0b1


Doesn't appear much in nightlies, but does in the a1-3 and b1 releases. none have comments check the graph at*%29


NS_GetInnermostURI	nsNetUtil.h:1412
nsScriptSecurityManager::CheckLoadURIWithPrincipal	caps/src/nsScriptSecurityManager.cpp:1321
NS_InvokeByIndex_P	xpcom/reflect/xptcall/src/md/win32/xptcinvoke.cpp:101
XPCWrappedNative::CallMethod	js/src/xpconnect/src/xpcwrappednative.cpp:2263
XPC_WN_CallMethod	js/src/xpconnect/src/xpcwrappednativejsops.cpp:1477
js_Invoke	js/src/jsinterp.cpp:1313
I'm wondering if there are any extensions installed - from what I can tell, no one calls CheckLoadURIWithPrincipal from js.
Content context menu does, (as does contentAreaUtils.js which viewSourceUtils.js includes, but I don't see it hitting that).

It's the sort of thing I often miss, but I don't quite see what you could pass to CheckLoadURIWithPrincipal to make it crash getting the innermost URI.
Component: Account Manager → General
QA Contact: account-manager → general
ah, I was just looking in the comm-central mxr, which doesn't include toolkit, I guess.

I think passing null would make it crash. I think NS_PRECONDITION does nothing in release builds.
this is a bug in caps. the method is scriptable it needs to handle null
Assignee: nobody → dveditz
Component: General → Security: CAPS
OS: Windows Vista → All
Product: Thunderbird → Core
QA Contact: general → caps
Hardware: x86 → All
Summary: crash [@ NS_GetInnermostURI(nsIURI*)] → crash [@ NS_GetInnermostURI - nsScriptSecurityManager::CheckLoadURIWithPrincipal]
Attached patch throw earlySplinter Review
Assignee: dveditz → timeless
Attachment #354912 - Flags: review?(bzbarsky)
Comment on attachment 354912 [details] [diff] [review]
throw early


leaving r?bz on in case he wants to look, but this is pretty self-obvious. But maybe handling null in NS_GetInnermostURI more gracefully would be worth the extra compare
  if (!nestedURI && uri)
before addref-ing.

You'd still need this change, of course, because if you survived the NS_GetInnermostURI call you'd crash on targetBaseURI->GetScheme(). This patch is both necessary and sufficient to fix this bug, additional changes to NS_GetInnermostURI can be a separate issue.

As long as you're in nsScriptSecurityManager, are there any other scriptable APIs that aren't sanity checking? checkLoadURI() doesn't check target, but falls through to this one. checkLoadURIStr/checkLoadURIStrWithPrincipal look OK, as does getCodebasePrincipal.

getChannelPrincipal() is scriptable and will crash on a null channel. "Don't do that" springs to mind, how robust do we want to be in the face of stupid XUL code?

isSystemPrincipal() can't handle a null return param, but that can't happen from script.
Attachment #354912 - Flags: superreview+
Comment on attachment 354912 [details] [diff] [review]
throw early

Looks good.

As far as NS_GetInnermostURI, I think we want to leave it as-is.  It's used in some performance-critical cases (and _does_ assert if passed unexpected input).
Attachment #354912 - Flags: review?(bzbarsky) → review+
Attached patch CrashtestSplinter Review
This does a nice job of crashing without the patch and not with, but I'm not really sure I'm not making bad assumptions about things like any exception being fine, or what principal I should pass to get as close as possible without crashing.
Attachment #355011 - Flags: review?(bzbarsky)
Comment on attachment 355011 [details] [diff] [review]

Any non-system principal will do, so just do a check that the principal is not the system principal?  r=bzbarsky with that change.
Attachment #355011 - Flags: review?(bzbarsky) → review+
Closed: 15 years ago
Flags: in-testsuite+
Resolution: --- → FIXED
Comment on attachment 354912 [details] [diff] [review]
throw early

wsm says this is a top crash on 1.9.1, it has a test and is tiny and correct, could we push to the branch?
Attachment #354912 - Flags: approval1.9.1?
(In reply to comment #11)
> (From update of attachment 354912 [details] [diff] [review])
> wsm says this is a top crash on 1.9.1, it has a test and is tiny and correct,
> could we push to the branch?

indeed, this needs to go out with the next beta, 3.0b3.
#9 crasher for 3.0b2+3.0b3pre
Whiteboard: [tb3needs]
(In reply to comment #11)
> (From update of attachment 354912 [details] [diff] [review])
> wsm says this is a top crash on 1.9.1, it has a test and is tiny and correct,
> could we push to the branch?

Attachment #354912 - Flags: approval1.9.1? → approval1.9.1+
Comment on attachment 354912 [details] [diff] [review]
throw early

a=me ... please land the test on the branch as well
v.fixed - don't see any crashes after 3.0b2 20090408014204
Crash Signature: [@ NS_GetInnermostURI - nsScriptSecurityManager::CheckLoadURIWithPrincipal]
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