Messages in this thread Patch in this message | | | From | "Shi, Alex" <> | Date | Thu, 1 Oct 2009 11:23:20 +0800 | Subject | [PATCH] Fix kernel panic on i386 machine when booting with profile=2 |
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Latest kernel has a kernel panic in booting on i386 machine when profile=2 setting in cmdline. Find it is due to 'sp' incorrect in profile_pc function.
BUG: unable to handle kernel NULL pointer dereference at 00000246 IP: [<c01288b6>] profile_pc+0x2a/0x48 *pde = 00000000 Oops: 0000 [#1] SMP
Signed-off-by: Alex Shi <alex.shi@intel.com> --- arch/x86/kernel/time.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/time.c b/arch/x86/kernel/time.c index dcb00d2..c4fedca 100644 --- a/arch/x86/kernel/time.c +++ b/arch/x86/kernel/time.c @@ -38,7 +38,12 @@ unsigned long profile_pc(struct pt_regs *regs) #ifdef CONFIG_FRAME_POINTER return *(unsigned long *)(regs->bp + sizeof(long)); #else +#ifdef CONFIG_X86_32 + unsigned long *sp = (unsigned long *)®s->sp; +#else unsigned long *sp = (unsigned long *)regs->sp; + +#endif /* * Return address is either directly at stack pointer * or above a saved flags. Eflags has bits 22-31 zero, -- 1.5.6.2
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