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5e5a6c5441
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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| genwqe | ||
| habanalabs | ||
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| lis3lv02d | ||
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| mei | ||
| ocxl | ||
| pvpanic | ||
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| ad525x_dpot-i2c.c | ||
| ad525x_dpot-spi.c | ||
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| atmel-ssc.c | ||
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| cs5535-mfgpt.c | ||
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| dummy-irq.c | ||
| dw-xdata-pcie.c | ||
| enclosure.c | ||
| fastrpc.c | ||
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| hi6421v600-irq.c | ||
| hisi_hikey_usb.c | ||
| hmc6352.c | ||
| hpilo.c | ||
| hpilo.h | ||
| ibmvmc.c | ||
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| Kconfig | ||
| kgdbts.c | ||
| lattice-ecp3-config.c | ||
| Makefile | ||
| pch_phub.c | ||
| pci_endpoint_test.c | ||
| phantom.c | ||
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| sram.h | ||
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