leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

x86: fix 27-rc crash on vsmp due to paravirt during module load

Browse Source 
27-rc fails to boot up if configured to use modules.

Turns out vsmp_patch was marked __init, and vsmp_patch being the
pvops 'patch' routine for vsmp, a call to vsmp_patch just turns out
to execute a code page with series of 0xcc (POISON_FREE_INITMEM -- int3).

vsmp_patch has been marked with __init ever since pvops, however,
apply_paravirt can be called during module load causing calls to
freed memory location.

Since apply_paravirt can only be called during init/module load, make
vsmp_patch with "__init_or_module"

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ravikiran G Thirumalai 2008-09-22 22:58:47 -07:00 committed by Ingo Molnar
parent b61e06f258
commit 05e12e1c4c
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/kernel/vsmp_64.c
View File

@ -61,7 +61,7 @@ static void vsmp_irq_enable(void)
native_restore_fl((flags | X86_EFLAGS_IF) & (~X86_EFLAGS_AC));
}
static unsigned __init vsmp_patch(u8 type, u16 clobbers, void *ibuf,
static unsigned __init_or_module vsmp_patch(u8 type, u16 clobbers, void *ibuf,
unsigned long addr, unsigned len)
{
switch (type) {