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| author | Kees Cook <keescook@chromium.org> | 2019-04-23 21:38:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-31 16:48:17 +0300 |
| commit | 87386764dac1e8dde46ad792e072bd8e8004ee00 (patch) | |
| tree | ea96bd3141c95e1e6ec2054165d2c29cd9f5e084 /arch/x86 | |
| parent | 56df2dbea3893b4a8bf00f53ea0d2b87a31c5877 (diff) | |
| download | linux-87386764dac1e8dde46ad792e072bd8e8004ee00.tar.xz | |
x86/build: Move _etext to actual end of .text
[ Upstream commit 392bef709659abea614abfe53cf228e7a59876a4 ]
When building x86 with Clang LTO and CFI, CFI jump regions are
automatically added to the end of the .text section late in linking. As a
result, the _etext position was being labelled before the appended jump
regions, causing confusion about where the boundaries of the executable
region actually are in the running kernel, and broke at least the fault
injection code. This moves the _etext mark to outside (and immediately
after) the .text area, as it already the case on other architectures
(e.g. arm64, arm).
Reported-and-tested-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20190423183827.GA4012@beast
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/vmlinux.lds.S | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S index 55f04875293f..51b772f9d886 100644 --- a/arch/x86/kernel/vmlinux.lds.S +++ b/arch/x86/kernel/vmlinux.lds.S @@ -111,11 +111,11 @@ SECTIONS *(.text.__x86.indirect_thunk) __indirect_thunk_end = .; #endif - - /* End of text section */ - _etext = .; } :text = 0x9090 + /* End of text section */ + _etext = .; + NOTES :text :note EXCEPTION_TABLE(16) :text = 0x9090 |