Josh Poimboeuf efc72a665a lkdtm: Disable return thunks in rodata.c ... The following warning was seen: WARNING: CPU: 0 PID: 0 at arch/x86/kernel/alternative.c:557 apply_returns (arch/x86/kernel/alternative.c:557 (discriminator 1)) Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc4-00008-gee88d363d156 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014 RIP: 0010:apply_returns (arch/x86/kernel/alternative.c:557 (discriminator 1)) Code: ff ff 74 cb 48 83 c5 04 49 39 ee 0f 87 81 fe ff ff e9 22 ff ff ff 0f 0b 48 83 c5 04 49 39 ee 0f 87 6d fe ff ff e9 0e ff ff ff <0f> 0b 48 83 c5 04 49 39 ee 0f 87 59 fe ff ff e9 fa fe ff ff 48 89 The warning happened when apply_returns() failed to convert "JMP __x86_return_thunk" to RET. It was instead a JMP to nowhere, due to the thunk relocation not getting resolved. That rodata.o code is objcopy'd to .rodata, and later memcpy'd, so relocations don't work (and are apparently silently ignored). LKDTM is only used for testing, so the naked RET should be fine. So just disable return thunks for that file. While at it, disable objtool and KCSAN for the file. Fixes: 0b53c374b9 ("x86/retpoline: Use -mfunction-return") Reported-by: kernel test robot <oliver.sang@intel.com> Debugged-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/lkml/Ys58BxHxoDZ7rfpr@xsang-OptiPlex-9020/		2022-07-20 19:24:53 +02:00
..
altera-stapl	altera-stapl: Use swap() instead of open coding it	2022-05-09 15:39:45 +02:00
bcm-vk	misc: bcm-vk: replace usage of found with dedicated list iterator variable	2022-04-24 17:30:27 +02:00
c2port
cardreader	misc: rtsx_usb: set return value in rsp_buf alloc err path	2022-07-02 16:20:56 +02:00
cb710
cxl	cxl/ocxl: Prepare cleanup of powerpc's asm/prom.h	2022-05-11 23:06:39 +10:00
echo
eeprom	eeprom: at25: Rework buggy read splitting	2022-06-27 16:21:05 +02:00
genwqe
habanalabs	habanalabs: use separate structure info for each error collect data	2022-05-22 21:01:21 +02:00
ibmasm
lis3lv02d	spi: make remove callback a void function	2022-02-09 13:00:45 +00:00
lkdtm	lkdtm: Disable return thunks in rodata.c	2022-07-20 19:24:53 +02:00
mei	mei: me: add raptor lake point S DID	2022-06-10 15:39:24 +02:00
ocxl	cxl/ocxl: Prepare cleanup of powerpc's asm/prom.h	2022-05-11 23:06:39 +10:00
pvpanic	misc/pvpanic: Convert regular spinlock into trylock on panic path	2022-04-29 16:54:59 +02:00
sgi-gru	misc: sgi-gru: Fix spelling mistake "unexpect" -> "unexpected"	2022-03-18 14:02:15 +01:00
sgi-xp	net: sgi-xp: Use netif_rx().	2022-03-04 12:02:19 +00:00
ti-st
uacce
vmw_vmci	VMCI: Add support for ARM64	2022-04-24 17:32:14 +02:00
ad525x_dpot-i2c.c
ad525x_dpot-spi.c	spi: make remove callback a void function	2022-02-09 13:00:45 +00:00
ad525x_dpot.c
ad525x_dpot.h
apds990x.c
apds9802als.c
atmel-ssc.c	misc: atmel-ssc: Fix IRQ check in ssc_probe	2022-06-10 15:29:56 +02:00
bh1770glc.c
cs5535-mfgpt.c
ds1682.c
dummy-irq.c
dw-xdata-pcie.c
enclosure.c
fastrpc.c	misc: fastrpc: fix list iterator in fastrpc_req_mem_unmap_impl	2022-05-19 18:57:20 +02:00
gehc-achc.c
hi6421v600-irq.c	misc: hi6421-spmi-pmic: Use generic_handle_irq_safe().	2022-03-02 22:28:50 +01:00
hisi_hikey_usb.c
hmc6352.c
hpilo.c
hpilo.h
ibmvmc.c
ibmvmc.h
ics932s401.c
isl29003.c
isl29020.c
Kconfig	misc: fastrpc: Add support to secure memory map	2022-03-18 14:11:00 +01:00
kgdbts.c	kgdbts: fix return value of __setup handler	2022-03-18 14:17:56 +01:00
lattice-ecp3-config.c	spi: make remove callback a void function	2022-02-09 13:00:45 +00:00
Makefile	misc: open-dice: Add driver to expose DICE data to userspace	2022-02-04 16:45:39 +01:00
open-dice.c	misc: open-dice: Add driver to expose DICE data to userspace	2022-02-04 16:45:39 +01:00
pch_phub.c
pci_endpoint_test.c	misc: pci_endpoint_test: Terminate statement with semicolon	2022-01-11 10:19:59 -06:00
phantom.c
qcom-coincell.c
sram-exec.c
sram.c
sram.h
tifm_7xx1.c
tifm_core.c
tsl2550.c
vmw_balloon.c	vmw_balloon: Print errors on reset only once	2022-04-24 17:24:06 +02:00
xilinx_sdfec.c