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| author | Nick Clifton <nickc@redhat.com> | 2022-07-01 15:58:52 +0100 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2022-07-01 16:00:06 +0100 |
| commit | 9234cdca6ee88badfc00297e72f13dac4e540c79 (patch) | |
| tree | 342cdf16f920434d3b09e2b82a0b5f9167586f77 /libiberty | |
| parent | aefe23f720a542e90ecc6629885b01d44139b043 (diff) | |
| download | gcc-9234cdca6ee88badfc00297e72f13dac4e540c79.tar.gz | |
Add a recursion limit to the demangle_const function in the Rust demangler.
libiberty/
PR demangler/105039
* rust-demangle.c (demangle_const): Add recursion limit.
Diffstat (limited to 'libiberty')
| -rw-r--r-- | libiberty/rust-demangle.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/libiberty/rust-demangle.c b/libiberty/rust-demangle.c index bb58d900e27..36afcfae278 100644 --- a/libiberty/rust-demangle.c +++ b/libiberty/rust-demangle.c @@ -126,7 +126,7 @@ parse_integer_62 (struct rust_demangler *rdm) return 0; x = 0; - while (!eat (rdm, '_')) + while (!eat (rdm, '_') && !rdm->errored) { c = next (rdm); x *= 62; @@ -1148,6 +1148,15 @@ demangle_const (struct rust_demangler *rdm) if (rdm->errored) return; + if (rdm->recursion != RUST_NO_RECURSION_LIMIT) + { + ++ rdm->recursion; + if (rdm->recursion > RUST_MAX_RECURSION_COUNT) + /* FIXME: There ought to be a way to report + that the recursion limit has been reached. */ + goto fail_return; + } + if (eat (rdm, 'B')) { backref = parse_integer_62 (rdm); @@ -1158,7 +1167,7 @@ demangle_const (struct rust_demangler *rdm) demangle_const (rdm); rdm->next = old_next; } - return; + goto pass_return; } ty_tag = next (rdm); @@ -1167,7 +1176,7 @@ demangle_const (struct rust_demangler *rdm) /* Placeholder. */ case 'p': PRINT ("_"); - return; + goto pass_return; /* Unsigned integer types. */ case 'h': @@ -1200,18 +1209,20 @@ demangle_const (struct rust_demangler *rdm) break; default: - rdm->errored = 1; - return; + goto fail_return; } - if (rdm->errored) - return; - - if (rdm->verbose) + if (!rdm->errored && rdm->verbose) { PRINT (": "); PRINT (basic_type (ty_tag)); } + + fail_return: + rdm->errored = 1; + pass_return: + if (rdm->recursion != RUST_NO_RECURSION_LIMIT) + -- rdm->recursion; } static void |