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Subject: [tip: objtool/core] objtool: Add stackleak instrumentation to uaccess
safe list
Cc: Josh Poimboeuf <jpoimboe@kernel.org>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>, x86@kernel.org,
linux-kernel@vger.kernel.org
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[tip:,objtool/core] objtool: Add stackleak instrumentation to uaccess safe list
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Commit Message
tip-bot2 for Thomas Gleixner
April 14, 2023, 2:47 p.m. UTC
The following commit has been merged into the objtool/core branch of tip: Commit-ID: 7f530fba1123edcad00d59e1a73019814935f0c1 Gitweb: https://git.kernel.org/tip/7f530fba1123edcad00d59e1a73019814935f0c1 Author: Josh Poimboeuf <jpoimboe@kernel.org> AuthorDate: Wed, 12 Apr 2023 10:29:35 -07:00 Committer: Peter Zijlstra <peterz@infradead.org> CommitterDate: Fri, 14 Apr 2023 16:08:27 +02:00 objtool: Add stackleak instrumentation to uaccess safe list If a function has a large stack frame, the stackleak plugin adds a call to stackleak_track_stack() after the prologue. This function may be called in uaccess-enabled code. Add it to the uaccess safe list. Fixes the following warning: vmlinux.o: warning: objtool: kasan_report+0x12: call to stackleak_track_stack() with UACCESS enabled Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/42e9b487ef89e9b237fd5220ad1c7cf1a2ad7eb8.1681320562.git.jpoimboe@kernel.org --- tools/objtool/check.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 9440b07..4c8ef81 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1279,6 +1279,8 @@ static const char *uaccess_safe_builtin[] = { "__ubsan_handle_type_mismatch_v1", "__ubsan_handle_shift_out_of_bounds", "__ubsan_handle_load_invalid_value", + /* STACKLEAK */ + "stackleak_track_stack", /* misc */ "csum_partial_copy_generic", "copy_mc_fragile",