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authorKees Cook <keescook@chromium.org>2022-02-06 20:12:50 +0300
committerKees Cook <keescook@chromium.org>2022-02-06 21:55:03 +0300
commitae978009fc013e3166c9f523f8b17e41a3c0286e (patch)
tree01201a87ccfe3d2b9b876069017ecb48aea449f4 /scripts/gcc-plugins
parent27e9faf415dbf94af19b9c827842435edbc1fbbc (diff)
downloadlinux-ae978009fc013e3166c9f523f8b17e41a3c0286e.tar.xz
gcc-plugins/stackleak: Ignore .noinstr.text and .entry.text
The .noinstr.text section functions may not have "current()" sanely available. Similarly true for .entry.text, though such a check is currently redundant. Add a check for both. In an x86_64 defconfig build, the following functions no longer receive stackleak instrumentation: __do_fast_syscall_32() do_int80_syscall_32() do_machine_check() do_syscall_64() exc_general_protection() fixup_bad_iret() Suggested-by: Peter Zijlstra <peterz@infradead.org> Cc: Alexander Popov <alex.popov@linux.com> Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'scripts/gcc-plugins')
-rw-r--r--scripts/gcc-plugins/stackleak_plugin.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/scripts/gcc-plugins/stackleak_plugin.c b/scripts/gcc-plugins/stackleak_plugin.c
index b04aa8e91a41..42f0252ee2a4 100644
--- a/scripts/gcc-plugins/stackleak_plugin.c
+++ b/scripts/gcc-plugins/stackleak_plugin.c
@@ -463,6 +463,10 @@ static bool stackleak_gate(void)
return false;
if (STRING_EQUAL(section, ".meminit.text"))
return false;
+ if (STRING_EQUAL(section, ".noinstr.text"))
+ return false;
+ if (STRING_EQUAL(section, ".entry.text"))
+ return false;
}
return track_frame_size >= 0;