src: fix double free reported by coverity#51046
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nodejs-github-bot added c++ 
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mhdawson commented Dec 4, 2023
There are 3 similar coverity reports to this in node_i18n.cc. This is not new (initial report was in 2022) and should only have affected the error case which is unlikely. 2. Condition U_SUCCESS(*status), taking true branch. 210 if (U_SUCCESS(*status)){211 destbuf.SetLength(len); 3. freed_arg: ToBufferEndian frees destbuf.buf_. [[hide details](https://scan9.scan.coverity.com/eventId=9536861-3&modelId=9536861-1&fileInstanceId=124810153&filePath=%2Fsrc%2Fnode_i18n.cc&fileStart=107&fileEnd=120)]212 ret = ToBufferEndian(env, &destbuf); [/src/node_i18n.cc](https://scan9.scan.coverity.com/fileInstanceId=/124810153&defectInstanceId=/9536861&modelId=/9536861-1) 107MaybeLocal<Object> ToBufferEndian(Environment* env, MaybeStackBuffer<T>* buf){1. freed_arg: New frees parameter buf->buf_. [[show details](https://scan9.scan.coverity.com/eventId=9536861-4&modelId=9536861-2&fileInstanceId=124809979&filePath=%2Fsrc%2Fnode_internals.h&fileStart=187&fileEnd=205)]108 MaybeLocal<Object> ret = Buffer::New(env, buf); 109if (ret.IsEmpty()) 110return ret; 111112static_assert(sizeof(T) == 1 || sizeof(T) == 2, 113"Currently only one- or two-byte buffers are supported"); 114if (sizeof(T) > 1 && IsBigEndian()){115SPREAD_BUFFER_ARG(ret.ToLocalChecked(), retbuf); 116SwapBytes16(retbuf_data, retbuf_length); 117 } 118119return ret; 120} 213 } CID 275315 (#1 of 1): Double free (USE_AFTER_FREE) 4. double_free: Calling ~MaybeStackBuffer frees pointer destbuf.buf_ which has already been freed. [[show details](https://scan9.scan.coverity.com/eventId=9536861-14&modelId=9536861-5&fileInstanceId=124810940&filePath=%2Fsrc%2Futil.h&fileStart=490&fileEnd=493)]214return ret; 215} |
Fix double free reported by coverity. ToBufferEndian() in node_i18n.cc was the only caller of Buffer::New() passing in a MaybeStackBuffer. Coverity reported a double free because there were paths in which the src buffer would be deleted by both the destruction of the MaybeStackBuffer and by the Buffer which was done even in failure cases for Buffer::New(). Signed-off-by: Michael Dawson <[email protected]>
Signed-off-by: Michael Dawson <[email protected]>
github-actionsbot removed the request-ci 
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nodejs-github-bot commented Dec 7, 2023
jasnell approved these changes Dec 9, 2023
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nodejs-github-bot commented Dec 10, 2023
mhdawson added a commit that referenced this pull request Dec 11, 2023
Fix double free reported by coverity. ToBufferEndian() in node_i18n.cc was the only caller of Buffer::New() passing in a MaybeStackBuffer. Coverity reported a double free because there were paths in which the src buffer would be deleted by both the destruction of the MaybeStackBuffer and by the Buffer which was done even in failure cases for Buffer::New(). Signed-off-by: Michael Dawson <[email protected]> PR-URL: #51046 Reviewed-By: James M Snell <[email protected]>
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mhdawson commented Dec 11, 2023
Landed in 9e87091 |
RafaelGSS pushed a commit that referenced this pull request Dec 15, 2023
Fix double free reported by coverity. ToBufferEndian() in node_i18n.cc was the only caller of Buffer::New() passing in a MaybeStackBuffer. Coverity reported a double free because there were paths in which the src buffer would be deleted by both the destruction of the MaybeStackBuffer and by the Buffer which was done even in failure cases for Buffer::New(). Signed-off-by: Michael Dawson <[email protected]> PR-URL: #51046 Reviewed-By: James M Snell <[email protected]>
Merged
richardlau pushed a commit that referenced this pull request Mar 25, 2024
Fix double free reported by coverity. ToBufferEndian() in node_i18n.cc was the only caller of Buffer::New() passing in a MaybeStackBuffer. Coverity reported a double free because there were paths in which the src buffer would be deleted by both the destruction of the MaybeStackBuffer and by the Buffer which was done even in failure cases for Buffer::New(). Signed-off-by: Michael Dawson <[email protected]> PR-URL: #51046 Reviewed-By: James M Snell <[email protected]>
Merged
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Fix double free reported by coverity. ToBufferEndian() in node_i18n.cc was the only caller of Buffer::New() passing in a MaybeStackBuffer. Coverity reported a double free because there were paths in which the src buffer would be deleted by both the destruction of the MaybeStackBuffer and by the Buffer which was done even in failure cases for Buffer::New().