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![]() Add WRITE_OPD to check that you can't modify function descriptors. Gives the following result when function descriptors are not protected: lkdtm: Performing direct entry WRITE_OPD lkdtm: attempting bad 16 bytes write at c00000000269b358 lkdtm: FAIL: survived bad write lkdtm: do_nothing was hijacked! Looks like a standard compiler barrier() is not enough to force GCC to use the modified function descriptor. Had to add a fake empty inline assembly to force GCC to reload the function descriptor. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/7eeba50d16a35e9d799820e43304150225f20197.1644928018.git.christophe.leroy@csgroup.eu |
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altera-stapl | ||
bcm-vk | ||
c2port | ||
cardreader | ||
cb710 | ||
cxl | ||
echo | ||
eeprom | ||
genwqe | ||
habanalabs | ||
ibmasm | ||
lis3lv02d | ||
lkdtm | ||
mei | ||
ocxl | ||
pvpanic | ||
sgi-gru | ||
sgi-xp | ||
ti-st | ||
uacce | ||
vmw_vmci | ||
ad525x_dpot-i2c.c | ||
ad525x_dpot-spi.c | ||
ad525x_dpot.c | ||
ad525x_dpot.h | ||
apds990x.c | ||
apds9802als.c | ||
atmel-ssc.c | ||
bh1770glc.c | ||
cs5535-mfgpt.c | ||
ds1682.c | ||
dummy-irq.c | ||
dw-xdata-pcie.c | ||
enclosure.c | ||
fastrpc.c | ||
gehc-achc.c | ||
hi6421v600-irq.c | ||
hisi_hikey_usb.c | ||
hmc6352.c | ||
hpilo.c | ||
hpilo.h | ||
ibmvmc.c | ||
ibmvmc.h | ||
ics932s401.c | ||
isl29003.c | ||
isl29020.c | ||
Kconfig | ||
kgdbts.c | ||
lattice-ecp3-config.c | ||
Makefile | ||
pch_phub.c | ||
pci_endpoint_test.c | ||
phantom.c | ||
qcom-coincell.c | ||
sram-exec.c | ||
sram.c | ||
sram.h | ||
tifm_7xx1.c | ||
tifm_core.c | ||
tsl2550.c | ||
vmw_balloon.c | ||
xilinx_sdfec.c |