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| author | Nathan Chancellor <nathan@kernel.org> | 2022-11-08 10:49:34 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2022-11-08 09:59:19 -0800 |
| commit | 000f8870a47bdc36730357883b6aef42bced91ee (patch) | |
| tree | fa6650627f716e6024b08c2f285ee0057d108b33 /include/asm-generic | |
| parent | 6f7630b1b5bc672b54c1285ee6aba752b446672c (diff) | |
| download | linux-000f8870a47bdc36730357883b6aef42bced91ee.tar.gz linux-000f8870a47bdc36730357883b6aef42bced91ee.tar.bz2 linux-000f8870a47bdc36730357883b6aef42bced91ee.zip | |
vmlinux.lds.h: Fix placement of '.data..decrypted' section
Commit d4c639990036 ("vmlinux.lds.h: Avoid orphan section with !SMP")
fixed an orphan section warning by adding the '.data..decrypted' section
to the linker script under the PERCPU_DECRYPTED_SECTION define but that
placement introduced a panic with !SMP, as the percpu sections are not
instantiated with that configuration so attempting to access variables
defined with DEFINE_PER_CPU_DECRYPTED() will result in a page fault.
Move the '.data..decrypted' section to the DATA_MAIN define so that the
variables in it are properly instantiated at boot time with
CONFIG_SMP=n.
Cc: stable@vger.kernel.org
Fixes: d4c639990036 ("vmlinux.lds.h: Avoid orphan section with !SMP")
Link: https://lore.kernel.org/cbbd3548-880c-d2ca-1b67-5bb93b291d5f@huawei.com/
Debugged-by: Ard Biesheuvel <ardb@kernel.org>
Reported-by: Zhao Wenhui <zhaowenhui8@huawei.com>
Tested-by: xiafukun <xiafukun@huawei.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221108174934.3384275-1-nathan@kernel.org
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index c15de165ec8f..f40a0e078bd0 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -341,6 +341,7 @@ #define DATA_DATA \ *(.xiptext) \ *(DATA_MAIN) \ + *(.data..decrypted) \ *(.ref.data) \ *(.data..shared_aligned) /* percpu related */ \ MEM_KEEP(init.data*) \ @@ -989,7 +990,6 @@ #ifdef CONFIG_AMD_MEM_ENCRYPT #define PERCPU_DECRYPTED_SECTION \ . = ALIGN(PAGE_SIZE); \ - *(.data..decrypted) \ *(.data..percpu..decrypted) \ . = ALIGN(PAGE_SIZE); #else |