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net/http: fix nil body causing ParseMultipartForm to panic

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ParseMultipartForm relies on a valid multipartReader, if the request body is nil,
the multipartReader should return an error. This way ParseMultipartForm can return
an error instead of causing mr.ReadForm(maxMemory) to panic

Fixes #48206

Change-Id: Ief906f2340c7ab29cacbd5f56892117202a0b911
Reviewed-on: https://go-review.googlesource.com/c/go/+/384454
Trust: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
hopehook 2022-02-09 20:20:06 +08:00 committed by Ian Lance Taylor
parent 96567fb3cc
commit eca0d44cec
1 changed files with 3 additions and 0 deletions
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3
src/net/http/request.go
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@ -480,6 +480,9 @@ func (r *Request) multipartReader(allowMixed bool) (*multipart.Reader, error) {
if v == "" {
return nil, ErrNotMultipart
}
if r.Body == nil {
return nil, errors.New("missing form body")
}
d, params, err := mime.ParseMediaType(v)
if err != nil || !(d == "multipart/form-data" || allowMixed && d == "multipart/mixed") {
return nil, ErrNotMultipart