https://github.com/torvalds/linux
Revision cf8016408d880afe9c5dc495af40dc2932874e77 authored by Sami Tolvanen on 22 December 2022, 22:57:47 UTC, committed by Kees Cook on 23 December 2022, 18:04:31 UTC
When CFI_CLANG and KASAN are both enabled, LLVM doesn't generate a CFI type hash for asan.module_ctor functions in translation units where CFI is disabled, which leads to a CFI failure during boot when do_ctors calls the affected constructors: CFI failure at do_basic_setup+0x64/0x90 (target: asan.module_ctor+0x0/0x28; expected type: 0xa540670c) Specifically, this happens because CFI is disabled for kernel/cfi.c. There's no reason to keep CFI disabled here anymore, so fix the failure by not filtering out CC_FLAGS_CFI for the file. Note that https://reviews.llvm.org/rG3b14862f0a96 fixed the issue where LLVM didn't emit CFI type hashes for any sanitizer constructors, but now type hashes are emitted correctly for TUs that use CFI. Link: https://github.com/ClangBuiltLinux/linux/issues/1742 Fixes: 89245600941e ("cfi: Switch to -fsanitize=kcfi") Reported-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20221222225747.3538676-1-samitolvanen@google.com
1 parent 7535b83
Tip revision: cf8016408d880afe9c5dc495af40dc2932874e77 authored by Sami Tolvanen on 22 December 2022, 22:57:47 UTC
cfi: Fix CFI failure with KASAN
cfi: Fix CFI failure with KASAN
Tip revision: cf80164
File | Mode | Size |
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Documentation | ||
LICENSES | ||
arch | ||
block | ||
certs | ||
crypto | ||
drivers | ||
fs | ||
include | ||
init | ||
io_uring | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
rust | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.clang-format | -rw-r--r-- | 19.9 KB |
.cocciconfig | -rw-r--r-- | 59 bytes |
.get_maintainer.ignore | -rw-r--r-- | 151 bytes |
.gitattributes | -rw-r--r-- | 62 bytes |
.gitignore | -rw-r--r-- | 2.0 KB |
.mailmap | -rw-r--r-- | 24.0 KB |
.rustfmt.toml | -rw-r--r-- | 369 bytes |
COPYING | -rw-r--r-- | 496 bytes |
CREDITS | -rw-r--r-- | 99.1 KB |
Kbuild | -rw-r--r-- | 2.5 KB |
Kconfig | -rw-r--r-- | 555 bytes |
MAINTAINERS | -rw-r--r-- | 672.1 KB |
Makefile | -rw-r--r-- | 69.0 KB |
README | -rw-r--r-- | 727 bytes |
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