diff options
Diffstat (limited to 'meta/recipes-devtools/binutils/binutils/0017-CVE-2021-3530.patch')
-rw-r--r-- | meta/recipes-devtools/binutils/binutils/0017-CVE-2021-3530.patch | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/meta/recipes-devtools/binutils/binutils/0017-CVE-2021-3530.patch b/meta/recipes-devtools/binutils/binutils/0017-CVE-2021-3530.patch new file mode 100644 index 0000000000..fa10a6c99a --- /dev/null +++ b/meta/recipes-devtools/binutils/binutils/0017-CVE-2021-3530.patch @@ -0,0 +1,102 @@ +From 25162c795b1a2becf936bb3581d86a307ea491eb Mon Sep 17 00:00:00 2001 +From: Nick Clifton <nickc@redhat.com> +Date: Thu, 15 Jul 2021 16:51:56 +0100 +Subject: [PATCH] Fix a stack exhaustion problem in the Rust demangling code in + the libiberty library. + + PR 99935 + * rust-demangle.c: Add recursion limit. + +CVE: CVE-2021-3530 +Upstream-Status: Backport[https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=25162c795b1a2becf936bb3581d86a307ea491eb] +Signed-off-by: Pgowda <pgowda.cve@gmail.com> + +--- + libiberty/ChangeLog | 5 +++++ + libiberty/rust-demangle.c | 31 +++++++++++++++++++++++++------ + 2 files changed, 30 insertions(+), 6 deletions(-) + +diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog +index bc1b35b97c4..8e39fd28eba 100644 +--- a/libiberty/ChangeLog ++++ b/libiberty/ChangeLog +@@ -1,3 +1,8 @@ ++2021-07-15 Nick Clifton <nickc@redhat.com> ++ ++ PR 99935 ++ * rust-demangle.c: Add recursion limit. ++ + 2021-01-04 Martin Liska <mliska@suse.cz> + + * strverscmp.c: Convert to utf8 from iso8859. +diff --git a/libiberty/rust-demangle.c b/libiberty/rust-demangle.c +index 449941b56dc..df09b7b8fdd 100644 +--- a/libiberty/rust-demangle.c ++++ b/libiberty/rust-demangle.c +@@ -74,6 +74,12 @@ struct rust_demangler + /* Rust mangling version, with legacy mangling being -1. */ + int version; + ++ /* Recursion depth. */ ++ uint recursion; ++ /* Maximum number of times demangle_path may be called recursively. */ ++#define RUST_MAX_RECURSION_COUNT 1024 ++#define RUST_NO_RECURSION_LIMIT ((uint) -1) ++ + uint64_t bound_lifetime_depth; + }; + +@@ -671,6 +677,15 @@ demangle_path (struct rust_demangler *rd + 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; ++ } ++ + switch (tag = next (rdm)) + { + case 'C': +@@ -688,10 +703,7 @@ demangle_path (struct rust_demangler *rd + case 'N': + ns = next (rdm); + if (!ISLOWER (ns) && !ISUPPER (ns)) +- { +- rdm->errored = 1; +- return; +- } ++ goto fail_return; + + demangle_path (rdm, in_value); + +@@ -776,9 +788,15 @@ demangle_path (struct rust_demangler *rd + } + break; + default: +- rdm->errored = 1; +- return; ++ goto fail_return; + } ++ goto pass_return; ++ ++ fail_return: ++ rdm->errored = 1; ++ pass_return: ++ if (rdm->recursion != RUST_NO_RECURSION_LIMIT) ++ -- rdm->recursion; + } + + static void +@@ -1317,6 +1335,7 @@ rust_demangle_callback (const char *mang + rdm.skipping_printing = 0; + rdm.verbose = (options & DMGL_VERBOSE) != 0; + rdm.version = 0; ++ rdm.recursion = (options & DMGL_NO_RECURSE_LIMIT) ? RUST_NO_RECURSION_LIMIT : 0; + rdm.bound_lifetime_depth = 0; + + /* Rust symbols always start with _R (v0) or _ZN (legacy). */ |