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fs: fix realpath inode link caching #33945

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The fs.realpath / fs.realpathSync cache already seen symbolic links
using the inode number which may be longer that max supported
JS number (2**53) and will therefore be incorrectly handled by possibly
entering infinite loop of calling stat on the same node.

This PR changes those functions (where appropriate) to use
bigint for inode numbers.

Fixes: #33936

I don't think it is possible to write a test for this as it depends on specific inode numbers being bigger than 2**53.

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines

/cc @nodejs/fs @bnoordhuis

The `fs.realpath` / `fs.realpathSync` cache already seen symbolic links
using the inode number which may be longer that max supported
JS number (2**53) and will therefore be incorrectly handled by possibly
entering infinite loop of calling stat on the same node.

This PR changes those functions (where appropriate) to use
bigint for inode numbers.

Fixes: nodejs#33936
@lundibundi lundibundi added the fs Issues and PRs related to the fs subsystem / file system. label Jun 18, 2020
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@jasnell
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jasnell commented Jun 18, 2020

@MMhunter ... can you verify whether this fixes the issue you reported in #33936?

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LGTM so long as we can get verification that it fixes the originally reported problem.

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ShadyZOZ commented Jun 19, 2020

fix verified!
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Thanks for finishing it up, Denys. :-)

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@MMhunter ... can you verify whether this fixes the issue you reported in #33936?

Yep, it fixes the issue.

@addaleax addaleax added lts-watch-v12.x author ready PRs that have at least one approval, no pending requests for changes, and a CI started. labels Jun 19, 2020
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jasnell pushed a commit that referenced this pull request Jun 24, 2020
The `fs.realpath` / `fs.realpathSync` cache already seen symbolic links
using the inode number which may be longer that max supported
JS number (2**53) and will therefore be incorrectly handled by possibly
entering infinite loop of calling stat on the same node.

This PR changes those functions (where appropriate) to use
bigint for inode numbers.

Fixes: #33936

PR-URL: #33945
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
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jasnell commented Jun 24, 2020

Landed in bd8a719

@jasnell jasnell closed this Jun 24, 2020
codebytere pushed a commit that referenced this pull request Jun 27, 2020
The `fs.realpath` / `fs.realpathSync` cache already seen symbolic links
using the inode number which may be longer that max supported
JS number (2**53) and will therefore be incorrectly handled by possibly
entering infinite loop of calling stat on the same node.

This PR changes those functions (where appropriate) to use
bigint for inode numbers.

Fixes: #33936

PR-URL: #33945
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
@codebytere codebytere mentioned this pull request Jun 28, 2020
codebytere pushed a commit that referenced this pull request Jun 30, 2020
The `fs.realpath` / `fs.realpathSync` cache already seen symbolic links
using the inode number which may be longer that max supported
JS number (2**53) and will therefore be incorrectly handled by possibly
entering infinite loop of calling stat on the same node.

This PR changes those functions (where appropriate) to use
bigint for inode numbers.

Fixes: #33936

PR-URL: #33945
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
codebytere pushed a commit that referenced this pull request Jul 10, 2020
The `fs.realpath` / `fs.realpathSync` cache already seen symbolic links
using the inode number which may be longer that max supported
JS number (2**53) and will therefore be incorrectly handled by possibly
entering infinite loop of calling stat on the same node.

This PR changes those functions (where appropriate) to use
bigint for inode numbers.

Fixes: #33936

PR-URL: #33945
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
codebytere pushed a commit that referenced this pull request Jul 12, 2020
The `fs.realpath` / `fs.realpathSync` cache already seen symbolic links
using the inode number which may be longer that max supported
JS number (2**53) and will therefore be incorrectly handled by possibly
entering infinite loop of calling stat on the same node.

This PR changes those functions (where appropriate) to use
bigint for inode numbers.

Fixes: #33936

PR-URL: #33945
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
@codebytere codebytere mentioned this pull request Jul 13, 2020
codebytere pushed a commit that referenced this pull request Jul 14, 2020
The `fs.realpath` / `fs.realpathSync` cache already seen symbolic links
using the inode number which may be longer that max supported
JS number (2**53) and will therefore be incorrectly handled by possibly
entering infinite loop of calling stat on the same node.

This PR changes those functions (where appropriate) to use
bigint for inode numbers.

Fixes: #33936

PR-URL: #33945
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
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Infinite event loop after calling fs.realpath on 16-inch Macbook
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