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| author | Kees Cook <keescook@chromium.org> | 2022-02-06 20:12:50 +0300 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2022-02-06 21:55:03 +0300 |
| commit | ae978009fc013e3166c9f523f8b17e41a3c0286e (patch) | |
| tree | 01201a87ccfe3d2b9b876069017ecb48aea449f4 /scripts/gcc-plugins | |
| parent | 27e9faf415dbf94af19b9c827842435edbc1fbbc (diff) | |
| download | linux-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.c | 4 |
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; |