diff options
| author | Guo Ren <guoren@linux.alibaba.com> | 2020-10-06 16:49:33 +0000 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-10-06 18:34:00 -0700 |
| commit | 84814460eef9af0fb56a4698341c9cb7996a6312 (patch) | |
| tree | e10b394b9d0d3154a6553e11335144c610b4aa7c | |
| parent | a78c6f5956a949b496a5b087188dde52483edf51 (diff) | |
| download | linux-84814460eef9af0fb56a4698341c9cb7996a6312.tar.bz2 | |
riscv: Fixup bootup failure with HARDENED_USERCOPY
6184358da000 ("riscv: Fixup static_obj() fail") attempted to elide a lockdep
failure by rearranging our kernel image to place all initdata within [_stext,
_end], thus triggering lockdep to treat these as static objects. These objects
are released and eventually reallocated, causing check_kernel_text_object() to
trigger a BUG().
This backs out the change to make [_stext, _end] all-encompassing, instead just
moving initdata. This results in initdata being outside of [__init_begin,
__init_end], which means initdata can't be freed.
Link: https://lore.kernel.org/linux-riscv/1593266228-61125-1-git-send-email-guoren@kernel.org/T/#t
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Reported-by: Aurelien Jarno <aurelien@aurel32.net>
Tested-by: Aurelien Jarno <aurelien@aurel32.net>
[Palmer: Clean up commit text]
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
| -rw-r--r-- | arch/riscv/kernel/vmlinux.lds.S | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/riscv/kernel/vmlinux.lds.S b/arch/riscv/kernel/vmlinux.lds.S index f3586e31ed1e..34d00d9e6eac 100644 --- a/arch/riscv/kernel/vmlinux.lds.S +++ b/arch/riscv/kernel/vmlinux.lds.S @@ -22,13 +22,11 @@ SECTIONS /* Beginning of code and text segment */ . = LOAD_OFFSET; _start = .; - _stext = .; HEAD_TEXT_SECTION . = ALIGN(PAGE_SIZE); __init_begin = .; INIT_TEXT_SECTION(PAGE_SIZE) - INIT_DATA_SECTION(16) . = ALIGN(8); __soc_early_init_table : { __soc_early_init_table_start = .; @@ -55,6 +53,7 @@ SECTIONS . = ALIGN(SECTION_ALIGN); .text : { _text = .; + _stext = .; TEXT_TEXT SCHED_TEXT CPUIDLE_TEXT @@ -67,6 +66,8 @@ SECTIONS _etext = .; } + INIT_DATA_SECTION(16) + /* Start of data section */ _sdata = .; RO_DATA(SECTION_ALIGN) |