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| author | Roland Shoemaker <bracewell@google.com> | 2024-06-10 15:34:12 -0700 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2024-09-05 14:55:11 +0000 |
| commit | 53487e5477151ed75da50e50a0ba8f1ca64c00a3 (patch) | |
| tree | 543e30bb801253a7a35e821ad35304e6ba005d8b | |
| parent | 3d1f1f27cf2f524dc17697f8058162ada850d61e (diff) | |
| download | go-53487e5477151ed75da50e50a0ba8f1ca64c00a3.tar.xz | |
[release-branch.go1.23] go/parser: track depth in nested element lists
Prevents stack exhaustion with extremely deeply nested literal values,
i.e. field values in structs.
Updates #69138
Fixes #69143
Fixes CVE-2024-34155
Change-Id: I2e8e33b44105cc169d7ed1ae83fb56df0c10f1ee
Reviewed-on: https://go-internal-review.googlesource.com/c/go/+/1520
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Russ Cox <rsc@google.com>
(cherry picked from commit eb1b038c0d01761694e7a735ef87ac9164c6568e)
Reviewed-on: https://go-internal-review.googlesource.com/c/go/+/1560
Commit-Queue: Roland Shoemaker <bracewell@google.com>
Reviewed-by: Tatiana Bradley <tatianabradley@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/611175
Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Bypass: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
| -rw-r--r-- | src/go/parser/parser.go | 2 | ||||
| -rw-r--r-- | src/go/parser/parser_test.go | 9 |
2 files changed, 7 insertions, 4 deletions
diff --git a/src/go/parser/parser.go b/src/go/parser/parser.go index 17808b366f..f268dea1a6 100644 --- a/src/go/parser/parser.go +++ b/src/go/parser/parser.go @@ -1676,6 +1676,8 @@ func (p *parser) parseElementList() (list []ast.Expr) { } func (p *parser) parseLiteralValue(typ ast.Expr) ast.Expr { + defer decNestLev(incNestLev(p)) + if p.trace { defer un(trace(p, "LiteralValue")) } diff --git a/src/go/parser/parser_test.go b/src/go/parser/parser_test.go index eea743c2b5..2c33e9ef31 100644 --- a/src/go/parser/parser_test.go +++ b/src/go/parser/parser_test.go @@ -598,10 +598,11 @@ var parseDepthTests = []struct { {name: "chan2", format: "package main; var x «<-chan »int"}, {name: "interface", format: "package main; var x «interface { M() «int» }»", scope: true, scopeMultiplier: 2}, // Scopes: InterfaceType, FuncType {name: "map", format: "package main; var x «map[int]»int"}, - {name: "slicelit", format: "package main; var x = «[]any{«»}»", parseMultiplier: 2}, // Parser nodes: UnaryExpr, CompositeLit - {name: "arraylit", format: "package main; var x = «[1]any{«nil»}»", parseMultiplier: 2}, // Parser nodes: UnaryExpr, CompositeLit - {name: "structlit", format: "package main; var x = «struct{x any}{«nil»}»", parseMultiplier: 2}, // Parser nodes: UnaryExpr, CompositeLit - {name: "maplit", format: "package main; var x = «map[int]any{1:«nil»}»", parseMultiplier: 2}, // Parser nodes: CompositeLit, KeyValueExpr + {name: "slicelit", format: "package main; var x = []any{«[]any{«»}»}", parseMultiplier: 3}, // Parser nodes: UnaryExpr, CompositeLit + {name: "arraylit", format: "package main; var x = «[1]any{«nil»}»", parseMultiplier: 3}, // Parser nodes: UnaryExpr, CompositeLit + {name: "structlit", format: "package main; var x = «struct{x any}{«nil»}»", parseMultiplier: 3}, // Parser nodes: UnaryExpr, CompositeLit + {name: "maplit", format: "package main; var x = «map[int]any{1:«nil»}»", parseMultiplier: 3}, // Parser nodes: CompositeLit, KeyValueExpr + {name: "element", format: "package main; var x = struct{x any}{x: «{«»}»}"}, {name: "dot", format: "package main; var x = «x.»x"}, {name: "index", format: "package main; var x = x«[1]»"}, {name: "slice", format: "package main; var x = x«[1:2]»"}, |