The patch titled
lguest: fix bzImage loading with CONFIG_RELOCATABLE=y
has been added to the -mm tree. Its filename is
lguest-fix-bzimage-loading-with-config_relocatable=y.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: lguest: fix bzImage loading with CONFIG_RELOCATABLE=y
From: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Jason Yeh sent his crashing .config: bzImages made with
CONFIG_RELOCATABLE=y put the relocs where the BSS is expected, and we crash
with unusual results such as:
lguest: unhandled trap 14 at 0xc0122ae1 (0xa9)
Relying on BSS being zero was merely laziness on my part.
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/lguest/lguest.c | 5 +++++
1 file changed, 5 insertions(+)
diff -puN drivers/lguest/lguest.c~lguest-fix-bzimage-loading-with-config_relocatable=y drivers/lguest/lguest.c
--- a/drivers/lguest/lguest.c~lguest-fix-bzimage-loading-with-config_relocatable=y
+++ a/drivers/lguest/lguest.c
@@ -1019,6 +1019,11 @@ __init void lguest_init(void *boot)
* the normal data segment to get through booting. */
asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_DS) : "memory");
+ /* Clear the part of the kernel data which is expected to be zero.
+ * Normally it will be anyway, but if we're loading from a bzImage with
+ * CONFIG_RELOCATALE=y, the relocations will be sitting here. */
+ memset(__bss_start, 0, __bss_stop - __bss_start);
+
/* The Host uses the top of the Guest's virtual address space for the
* Host<->Guest Switcher, and it tells us how much it needs in
* lguest_data.reserve_mem, set up on the LGUEST_INIT hypercall. */
_
Patches currently in -mm which might be from rusty@xxxxxxxxxxxxxxx are
origin.patch
lguest-documentation-i-preparation.patch
lguest-documentation-ii-guest.patch
lguest-documentation-iii-drivers.patch
lguest-documentation-iv-launcher.patch
lguest-documentation-v-host.patch
lguest-documentation-vi-switcher.patch
lguest-documentation-vii-fixmes.patch
lguest-fix-bzimage-loading-with-config_relocatable=y.patch
git-kvm.patch
git-newsetup-fixup.patch
readahead-compacting-file_ra_state.patch
readahead-mmap-read-around-simplification.patch
readahead-combine-file_ra_stateprev_index-prev_offset-into-prev_pos.patch
readahead-combine-file_ra_stateprev_index-prev_offset-into-prev_pos-fix.patch
readahead-combine-file_ra_stateprev_index-prev_offset-into-prev_pos-fix-2.patch
radixtree-introduce-radix_tree_next_hole.patch
readahead-basic-support-of-interleaved-reads.patch
readahead-remove-the-local-copy-of-ra-in-do_generic_mapping_read.patch
readahead-remove-several-readahead-macros.patch
readahead-remove-the-limit-max_sectors_kb-imposed-on-max_readahead_kb.patch
filemap-trivial-code-cleanups.patch
filemap-convert-some-unsigned-long-to-pgoff_t.patch
mmaps2-vma-out-of-mem_size_stats.patch
maps2-make-proc-pid-smaps-optional-under-config_embeddedpatch.patch
maps2-make-proc-pid-smaps-optional-under-config_embeddedpatch-fix.patch
remove-unsafe-from-module-struct.patch
cpu-hotplug-cpu-deliver-cpu_up_canceled-only-to-notify_oked-callbacks-with-cpu_up_prepare.patch
mm-clean-up-and-kernelify-shrinker-registration-reiser4.patch
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