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fs: guard against undefined behavior #34746

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fs: guard against undefined behavior #34746

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ceb22f5
fs: guard against undefined behavior
ronag Aug 12, 2020
e1380b9
fixup
ronag Aug 12, 2020
dc1dcff
fixup
ronag Aug 12, 2020
0bed9de
fixup
ronag Aug 12, 2020
6a3c7bb
fixup: ERR_FS_FILE_CLOSED
ronag Aug 12, 2020
fd5ca60
fixup
ronag Aug 12, 2020
44c40dc
fixup: transfer warning
ronag Aug 13, 2020
87f14ed
fixup
ronag Aug 13, 2020
c1f4245
Update test/parallel/test-worker-message-port-transfer-filehandle.js
ronag Aug 13, 2020
8ebe12d
fixup: docs
ronag Aug 13, 2020
dcd5ddb
Apply suggestions from code review
ronag Aug 13, 2020
b384f08
fixup: docs
ronag Aug 13, 2020
69cc10b
fixup: linting
ronag Aug 13, 2020
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fixup: ERR_FS_FILE_CLOSED
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@ronag
ronag committed Aug 12, 2020
commit 6a3c7bb8273ca07b10f2fd466c25c163c1135e19
6 changes: 6 additions & 0 deletions doc/api/errors.md
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Expand Up @@ -928,6 +928,12 @@ added: v14.0.0
Used when a feature that is not available
to the current platform which is running Node.js is used.

<a id="ERR_FS_FILE_CLOSED"></a>
### `ERR_FS_FILE_CLOSED`

An attempt has been made to use a
closed file handle.

<a id="ERR_FS_FILE_TOO_LARGE"></a>
### `ERR_FS_FILE_TOO_LARGE`

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1 change: 1 addition & 0 deletions lib/internal/errors.js
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Expand Up @@ -838,6 +838,7 @@ E('ERR_FEATURE_UNAVAILABLE_ON_PLATFORM',
'The feature %s is unavailable on the current platform' +
', which is being used to run Node.js',
TypeError);
E('ERR_FS_FILE_CLOSED', 'File is closed', Error);
E('ERR_FS_FILE_TOO_LARGE', 'File size (%s) is greater than 2 GB', RangeError);
E('ERR_FS_INVALID_SYMLINK_TYPE',
'Symlink type must be one of "dir", "file", or "junction". Received "%s"',
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9 changes: 6 additions & 3 deletions lib/internal/fs/promises.js
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Expand Up @@ -28,6 +28,7 @@ const binding = internalBinding('fs');
const { Buffer } = require('buffer');
const {
ERR_FS_FILE_TOO_LARGE,
ERR_FS_FILE_CLOSED,
ERR_INVALID_ARG_TYPE,
ERR_INVALID_ARG_VALUE,
ERR_METHOD_NOT_IMPLEMENTED
Expand Down Expand Up @@ -193,11 +194,14 @@ class FileHandle extends JSTransferable {
}

async function fsCall(fn, handle, ...args) {
if (!(handle instanceof FileHandle) ||
handle.fd === -1 || handle[kRefs] === 0) {
if (!(handle instanceof FileHandle)) {
throw new ERR_INVALID_ARG_TYPE('filehandle', 'FileHandle', handle);
}

if (handle.fd === -1 || handle[kRefs] === 0) {
throw new ERR_FS_FILE_CLOSED();
}

try {
handle[kRefs]++;
return await fn(handle, ...args);
Expand Down Expand Up @@ -483,7 +487,6 @@ async function unlink(path) {
}

async function fchmod(handle, mode) {
validateFileHandle(handle);
mode = parseFileMode(mode, 'mode');
return binding.fchmod(handle.fd, mode, kUsePromises);
}
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