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| author | Juergen Gross <jgross@suse.com> | 2022-06-30 09:14:41 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-08 17:26:44 +0100 |
| commit | 65fd21aa3805f8e2ede23c6cdd144defeea12eb8 (patch) | |
| tree | 3ad5ae35cfbe4e6a44bbb1807c7a66fee8099950 | |
| parent | d4c8bf5635c4bedaf2470761ced1f502b2d5434e (diff) | |
| download | aa-65fd21aa3805f8e2ede23c6cdd144defeea12eb8.tar.gz | |
x86: Fix .brk attribute in linker script
commit 7e09ac27f43b382f5fe9bb7c7f4c465ece1f8a23 upstream.
Commit in Fixes added the "NOLOAD" attribute to the .brk section as a
"failsafe" measure.
Unfortunately, this leads to the linker no longer covering the .brk
section in a program header, resulting in the kernel loader not knowing
that the memory for the .brk section must be reserved.
This has led to crashes when loading the kernel as PV dom0 under Xen,
but other scenarios could be hit by the same problem (e.g. in case an
uncompressed kernel is used and the initrd is placed directly behind
it).
So drop the "NOLOAD" attribute. This has been verified to correctly
cover the .brk section by a program header of the resulting ELF file.
Fixes: e32683c6f7d2 ("x86/mm: Fix RESERVE_BRK() for older binutils")
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://lore.kernel.org/r/20220630071441.28576-4-jgross@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/kernel/vmlinux.lds.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S index bed5475b2ee94f..351c604de263ac 100644 --- a/arch/x86/kernel/vmlinux.lds.S +++ b/arch/x86/kernel/vmlinux.lds.S @@ -411,7 +411,7 @@ SECTIONS __end_of_kernel_reserve = .; . = ALIGN(PAGE_SIZE); - .brk (NOLOAD) : AT(ADDR(.brk) - LOAD_OFFSET) { + .brk : AT(ADDR(.brk) - LOAD_OFFSET) { __brk_base = .; . += 64 * 1024; /* 64k alignment slop space */ *(.bss..brk) /* areas brk users have reserved */ |