Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e6bcf562e58662b9765748d346e4c076b20e3aa5
Commit: e6bcf562e58662b9765748d346e4c076b20e3aa5
Parent: e523d93c8487667552dd29ff756d6ea6bce30851
Author: Hideo Saito <[EMAIL PROTECTED]>
AuthorDate: Wed Feb 28 18:35:42 2007 +0900
Committer: Paul Mundt <[EMAIL PROTECTED]>
CommitDate: Mon Mar 5 14:13:26 2007 +0900
sh: Fix kernel thread stack corruption with preempt.
When I run a preemptive kernel-2.6.20 for SH7780, a created
kthread(pdflush) can not exit by do_exit() in kernel_thread_helper. I
think that the created kthread should have a room for 'struct pt_regs'
space on the stack top, because __switch_to() will refer to the space as
follows using 'regs = task_pt_regs(prev)' and next condition may be true.
Signed-off-by: Hideo Saito <[EMAIL PROTECTED]>
Signed-off-by: Paul Mundt <[EMAIL PROTECTED]>
---
arch/sh/kernel/process.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 9d6a438..e760736 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -250,12 +250,11 @@ int copy_thread(int nr, unsigned long clone_flags,
unsigned long usp,
childregs->regs[15] = usp;
ti->addr_limit = USER_DS;
} else {
- childregs->regs[15] = (unsigned long)task_stack_page(p) +
- THREAD_SIZE;
+ childregs->regs[15] = (unsigned long)childregs;
ti->addr_limit = KERNEL_DS;
}
- if (clone_flags & CLONE_SETTLS)
+ if (clone_flags & CLONE_SETTLS)
childregs->gbr = childregs->regs[0];
childregs->regs[0] = 0; /* Set return value for child */
-
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