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buffer: neuter external nullptr buffers #3624

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buffer: neuter external nullptr buffers #3624

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indutny
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@indutny indutny commented Nov 2, 2015

Neuter external nullptr buffers, otherwise their contents will be materialized on access, and the buffer instance will be internalized.

This leads to a crash like this:

v8::ArrayBuffer::Neuter Only externalized ArrayBuffers can be
neutered

Fix: #3619

cc @Trott @trevnorris

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Trott commented Nov 2, 2015

Fixes the issue for me. 👍

@Trott Trott mentioned this pull request Nov 2, 2015
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Trott commented Nov 2, 2015

Not that you need help kicking of a CI job, but I did it anyway: https://ci.nodejs.org/job/node-test-pull-request/657/

@mscdex mscdex added the buffer Issues and PRs related to the buffer subsystem. label Nov 2, 2015
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indutny commented Nov 2, 2015

CI looks green, thank you @Trott

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indutny commented Nov 2, 2015

cc @nodejs/collaborators

I would like to get LGTM from either @trevnorris or @bnoordhuis before landing it.

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indutny commented Nov 2, 2015

btw, other reviews are more than welcome!

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LGTM

Would you consider this a v8 bug?

bnoordhuis
bnoordhuis reviewed Nov 2, 2015
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src/node_buffer.cc
@@ -362,6 +362,8 @@ MaybeLocal<Object> New(Environment* env,
}

Local<ArrayBuffer> ab = ArrayBuffer::New(env->isolate(), data, length);
if (data == nullptr)
ab->Neuter();
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Can you add a comment explaining why the Neuter() call is necessary?

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Yep, will do.

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LGTM with comments.

evanlucas
evanlucas reviewed Nov 2, 2015
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test/addons/null-buffer-neuter/test.js
@@ -0,0 +1,7 @@
'use strict';
// Flags: --expose-gc
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Is this flag necessary here?

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Yes. Without it, v8::Isolate::RequestGarbageCollectionForTesting() aborts with a run-time error.

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Ah ok, didn't realize that

@indutny
buffer: neuter external nullptr buffers
0eeb375 
Neuter external `nullptr` buffers, otherwise their contents will be
materialized on access, and the buffer instance will be internalized.

This leads to a crash like this:

    v8::ArrayBuffer::Neuter Only externalized ArrayBuffers can be
    neutered

Fix: nodejs#3619
@indutny
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indutny commented Nov 2, 2015

@trevnorris I'm not sure, maybe a documentation bug. Filed an issue: https://code.google.com/p/v8/issues/detail?id=4530

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indutny commented Nov 2, 2015

@nodejs/release how do I mark it to be landed on v5?

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indutny commented Nov 2, 2015

Landed in master in 827ee49, thank you everyone!

@indutny indutny closed this Nov 2, 2015
@indutny indutny deleted the fix/gh-3619 branch November 2, 2015 13:38
indutny added a commit that referenced this pull request Nov 2, 2015
@indutny
buffer: neuter external nullptr buffers
827ee49 
Neuter external `nullptr` buffers, otherwise their contents will be
materialized on access, and the buffer instance will be internalized.

This leads to a crash like this:

    v8::ArrayBuffer::Neuter Only externalized ArrayBuffers can be
    neutered

Fix: #3619
PR-URL: #3624
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
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Trott commented Nov 2, 2015

I'm unable to find anything about who can propose releases and how, but is this a sufficiently significant bug/fix that a 5.0.1 release should happen as soon as is reasonable? Breaking nativescript and ffi seems significant to me, but I don't know what the agreed-upon litmus test (if any) is.

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Does this affect LTS?

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indutny commented Nov 2, 2015

@trevnorris nope, it just gets raw backing_store from the ArrayBuffer without materializing it. LTS is safe.

@Fishrock123 Fishrock123 mentioned this pull request Nov 6, 2015
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indutny added a commit that referenced this pull request Nov 7, 2015
@indutny @rvagg
buffer: neuter external nullptr buffers
5667369 
Neuter external `nullptr` buffers, otherwise their contents will be
materialized on access, and the buffer instance will be internalized.

This leads to a crash like this:

    v8::ArrayBuffer::Neuter Only externalized ArrayBuffers can be
    neutered

Fix: #3619
PR-URL: #3624
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
@Fishrock123 Fishrock123 mentioned this pull request Nov 11, 2015
Merged
@rvagg rvagg mentioned this pull request Dec 17, 2015
Closed
@MylesBorins MylesBorins mentioned this pull request Jan 14, 2016
Closed
addaleax added a commit to addaleax/node that referenced this pull request Jan 13, 2019
@addaleax
src: remove outdated Neuter() call in node_buffer.cc
98da4cc 
This call was introduced in 827ee49 to avoid a crash in a
later `Neuter()` call that has later been removed in ebbbc5a,
rendering the original call unnecessary.

Refs: nodejs#3624
Refs: nodejs#5204
@addaleax addaleax mentioned this pull request Jan 13, 2019
Closed
2 tasks
addaleax added a commit that referenced this pull request Jan 21, 2019
@addaleax
src: remove outdated Neuter() call in node_buffer.cc
30f4568 
This call was introduced in 827ee49 to avoid a crash in a
later `Neuter()` call that has later been removed in ebbbc5a,
rendering the original call unnecessary.

Refs: #3624
Refs: #5204

PR-URL: #25479
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
targos pushed a commit that referenced this pull request Jan 24, 2019
@addaleax @targos
src: remove outdated Neuter() call in node_buffer.cc
dbecc82 
This call was introduced in 827ee49 to avoid a crash in a
later `Neuter()` call that has later been removed in ebbbc5a,
rendering the original call unnecessary.

Refs: #3624
Refs: #5204

PR-URL: #25479
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
BethGriggs pushed a commit that referenced this pull request Apr 29, 2019
@addaleax @BethGriggs
src: remove outdated Neuter() call in node_buffer.cc
1d2d3f3 
This call was introduced in 827ee49 to avoid a crash in a
later `Neuter()` call that has later been removed in ebbbc5a,
rendering the original call unnecessary.

Refs: #3624
Refs: #5204

PR-URL: #25479
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
BethGriggs pushed a commit that referenced this pull request May 10, 2019
@addaleax @BethGriggs
src: remove outdated Neuter() call in node_buffer.cc
f71c55b 
This call was introduced in 827ee49 to avoid a crash in a
later `Neuter()` call that has later been removed in ebbbc5a,
rendering the original call unnecessary.

Refs: #3624
Refs: #5204

PR-URL: #25479
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
MylesBorins pushed a commit that referenced this pull request May 16, 2019
@addaleax @MylesBorins
src: remove outdated Neuter() call in node_buffer.cc
cd4a932 
This call was introduced in 827ee49 to avoid a crash in a
later `Neuter()` call that has later been removed in ebbbc5a,
rendering the original call unnecessary.

Refs: #3624
Refs: #5204

PR-URL: #25479
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
deepak1556 pushed a commit to electron/node that referenced this pull request Jul 10, 2019
@addaleax @deepak1556
src: remove outdated Neuter() call in node_buffer.cc
e13e8fe 
This call was introduced in 827ee49 to avoid a crash in a
later `Neuter()` call that has later been removed in ebbbc5a,
rendering the original call unnecessary.

Refs: nodejs/node#3624
Refs: nodejs/node#5204

PR-URL: nodejs/node#25479
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
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@indutny @Trott @trevnorris @bnoordhuis @evanlucas @mscdex @jasnell @rvagg