From bf548c9f8e2a1b812a8a40c0e999f29486f299e9 Mon Sep 17 00:00:00 2001
From: Florent Revest <revest@chromium.org>
Date: Thu, 8 Jan 2026 18:34:06 +0100
Subject: [PATCH] x86: Add a test for Clang unnamed sections

The origin object is the result of this file on a 6.18 build:

	#include <linux/compiler.h>

	void test_ubsan_out_of_bounds(void);
	void test_ubsan_out_of_bounds(void)
	{
		int i = 4, j = 4;
		volatile struct {
			char above[4];
			int arr[4];
			char below[4];
		} data;

		OPTIMIZER_HIDE_VAR(i);
		OPTIMIZER_HIDE_VAR(j);

		data.arr[j] = i;
	}

And the patch is:

	 void test_ubsan_out_of_bounds(void)
	 {
	-	int i = 4, j = 4;
	+	int i = 4, j = -1;
		volatile struct {
			char above[4];
			int arr[4];

Since Clang UBSAN generates "unnamed" sections, it exercises these
sections changing.
---
 x86_64/clang-unnamed.ORIG.o    | Bin 0 -> 2984 bytes
 x86_64/clang-unnamed.PATCHED.o | Bin 0 -> 3064 bytes
 x86_64/clang-unnamed.test      |   4 ++++
 3 files changed, 4 insertions(+)
 create mode 100644 x86_64/clang-unnamed.ORIG.o
 create mode 100644 x86_64/clang-unnamed.PATCHED.o
 create mode 100755 x86_64/clang-unnamed.test

diff --git a/x86_64/clang-unnamed.ORIG.o b/x86_64/clang-unnamed.ORIG.o
new file mode 100644
index 0000000000000000000000000000000000000000..e3a0f97ea2a0684d49fe190f0f44a3cb49bc3183
GIT binary patch
literal 2984
zcmbtVJ!}<65MKMe$4`iY&5uDMQVz+&hA0Q-*MJng!oU?)ngoPo&~oqYo_+Y<9o*eB
zb`>N;VWmk+n~FAR(?m)l(^1e+MKnl>k|H!|f@EfPXWlK#y+|k{-OkLn^Ucof&fa}}
zY5wx)$cSJW5uc07V^oOgZI#_tW?M{%{bKhgb3%OSt^egj-Zw3r@HXZq4|<z(lVi#Q
zV}~}Hlc;}e!m$2tvpDPpKX2T4&>ZkC0<V9_TmQvbaR0#2jo-Y@O*DST;m@Z^b&KO^
zR>s}6<NZ$Ir?QNS(hbDcmJm}bS>l&*5;<{NE}XtOg*35COo6Ly1*l;h#?i{HthuNY
z`>7Koe!A$aM0pWssWWrlopH}O)2BY|^y4Hvb5!iZ1cu-{wnp)lTcaloTjLrr!r$A(
zGii!f@RsjNqy9}q0~mGE5bB`bnQ92*kd4`f*lu{*{0P(@W8J$Hf%~iuo_tm(hv422
zd|?Q_Is_MQbptkq)JWDZW!9CQte=L3kg^-4WxggQn0eHdMd=62GFV!ci+w*20bQLv
z3o~Uuhu&K1r^^88OiO+mCXuugRvEf}oIrU>%sYfV@On!N?i&jB-cEQJzl<P=jbGQW
zI>`^f=6Ij*U7*cV>l*Pm$MHP_|Iok*R(HO^4ro3@-FMZ*K{64q>msZlpKBDy3gZ#C
zh2t6Lj%A$R4fha*aoh_Od>0hPuWENtKjU1_KALCz2KoG6jB`H=w^-|yeg|}!YrVu)
z8LgJW&7;J3(S%`0*SUEX`lXL4X51N|XxE*G)=E>q7lra<EqaR5E4CR9NrJ4`gI*Rc
zd=4Y`$`@BZQ=KT>Bw6W6KMdj1wMcyG=OTs@H6&#(fGbhTBnyO_<pET3FHS=uRDg`{
z&=&nKbqLtl1ALyGtj&g{xepjV0>*#w2j@iu?qB8~1_N`p86bU~n*K5QdqHClaKCY1
zTmlT&$M2Xa-;;B|1i{8w6xLsnjk!&ELe7K<f^FA-8!*ge^Irgl!uLUYRsHNg1Oxfz
z9ml!9aR71DSPl02_hG7T|M(Z<5f%3j{}%TCJpv5ZKLL*^V+evwYc&`NRvZMsgNLy}
z5E!#{U`^}~fHmf~GEn#783^<3eYMm63Jk>TxC<0$_bc-m{|UHt`{z*r_ZjXVe$(vz
zdk$FL`fXZ>;~`85`>dY<TDShKn)UG?#XPR-C17>yd$j&BwQ4mGJh<=w4B_V#_;E#5
z7W1h*@e0to`d2C7G4XN##^JH+$9(qLA>~_Ii2DHl4|V;E|7!d0ApZ#^-9X0>uAd>S
PsgCcobVSP{Sgv>j!oDOk

literal 0
HcmV?d00001

diff --git a/x86_64/clang-unnamed.PATCHED.o b/x86_64/clang-unnamed.PATCHED.o
new file mode 100644
index 0000000000000000000000000000000000000000..8d49808447468f67ea90540408df6644988d3ca0
GIT binary patch
literal 3064
zcmbtW&1)1{5U*q=elC7S4Jd5y5{x2tjGqx<8J4Jh2(qA_VtDj)_hj1ibW3+noSY0q
zh2TG+*FAY$_Ou{^2PHQV_Ok!LLPQb0EPGJKs_v?pXWQe&f__!?d-d^Ny?Srv&c)eF
z!$U(LGz7muUlSCdv#BrFGO-5xVIS=LaR%V}RcrOF;aLwxXvSKb86UIOXU2DB8VXx-
zp*l|dNfn2uU8L1d)#PW(d9ilmZnfup0iD~2tkvhn+`Rdk9M;}h>+2+J(D3GE#u~|F
z7^Qw=d9qzk>`<j%l9~=cw+k?_6a{wb2cF@F>D=l03G##OFo9|=XFxXW#&Ni>_N5uG
z?%Sc^1a`P!EO~L_N1-uw-kdVe8AnbXtGE5YJ#!RBDS$?_)sf*{@V>imcq|*IH95y~
zn;h3%ze}VutHKA|{nu0}-yu}cql_w$o#R(i70{YMo2|fRP0Pg{$o6P?J8VJq&-#LO
zVJ8RR)&P8N08V+z;=>nhLfxWrBx<KBYN&eD4&4NlYItE9FDr#&>@`%9+RmbKnu}_o
zZO1O6o$0eUleS}Qx@J3EL@1Bcv_m)WR54&bLc{h0TwX@{9ix8uNEZTWC(lz)Zq@MF
z0k~qEPI8-O-(-9{a{bg=jFUahN#0b$f6#D-vp1n43UaA&-go_pF%}6g>mu40ee-N5
zjO@$qq1cO^bgbaAH>x3#;L?$_7b3xF&qT6*!Kt5!MswD)zrnifOYCL+hYI%i1Z89}
z7klY{Fq7q0YS)pcan73}rCuimGxh@8BoT)JU24XWYo|7am@=o(C0ET^Y{f9NTb`><
zmZGOPeCDm2V-P25wXpZW#CO#*FJHNSJnLLAgJ7wpY}dsnaDn}~{}UgVm_tgn9K1rQ
z3L*#0D0XlqxBbv%hd!YETU?s&Vh7QidPdG)g4IMQaOoR?52Nrc|K54AgY=8||AYd?
ztO>xp!<XbS>wA$?4@iGXA6-O@^3%Jg(_gF{&_R^RmPq(DmMOMQuUOfygD4l*e-kl^
zRrKFrKYB}alJyIA4+Zkq-vpZbp9Ul&8~Z~s{|Zi()z9FAve=dCM|WBBOZ^@pM)^<R
zr_&gLNJnzk8yU`g2>cyC!Fon0)XKmT+dmPj%yuJWEBN(D{EKxhhJAq^gca?6WkW7Q
zFRu6t{tRbGuHmOslMSR!R6lwHi}m{lv9kOYClY&!ExPc(aiT2$N=bhDFCc!hu73yQ
z|BdsXmBh?t|8n2|8{mJR4aW!g^YY*W&X=wKAsbMAh^T(_7q7T}N>e;Lgy0X(Kh2ze
lPs;k2e%p(8hx|7<=o%>+akw5rYbx`<HIkc*6dVdFd<J5?IUN81

literal 0
HcmV?d00001

diff --git a/x86_64/clang-unnamed.test b/x86_64/clang-unnamed.test
new file mode 100755
index 0000000..3071c8e
--- /dev/null
+++ b/x86_64/clang-unnamed.test
@@ -0,0 +1,4 @@
+#!/bin/bash
+source $KPATCH_TEST_LIBRARY
+
+assert_num_funcs 1