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authorJan Beulich <jbeulich@novell.com>2005-09-12 18:49:24 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-12 10:50:57 -0700
commit1209140c3c70aaa32d1a0462d79557f2a44a4ef8 (patch)
tree2dc299ad357392f7d81e85131615bb61f0b1a14c /arch/x86_64/mm/fault.c
parent059bf0f6c33058680e4381f17d554baaa4f45d68 (diff)
[PATCH] x86-64: Safe interrupts in oops_begin/end
Rather than blindly re-enabling interrupts in oops_end(), save their state in oope_begin() and then restore that state. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/mm/fault.c')
-rw-r--r--arch/x86_64/mm/fault.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86_64/mm/fault.c b/arch/x86_64/mm/fault.c
index 816732d8858..b75b872ec15 100644
--- a/arch/x86_64/mm/fault.c
+++ b/arch/x86_64/mm/fault.c
@@ -221,12 +221,13 @@ int unhandled_signal(struct task_struct *tsk, int sig)
static noinline void pgtable_bad(unsigned long address, struct pt_regs *regs,
unsigned long error_code)
{
- oops_begin();
+ unsigned long flags = oops_begin();
+
printk(KERN_ALERT "%s: Corrupted page table at address %lx\n",
current->comm, address);
dump_pagetable(address);
__die("Bad pagetable", regs, error_code);
- oops_end();
+ oops_end(flags);
do_exit(SIGKILL);
}
@@ -304,6 +305,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
unsigned long address;
const struct exception_table_entry *fixup;
int write;
+ unsigned long flags;
siginfo_t info;
#ifdef CONFIG_CHECKING
@@ -521,7 +523,7 @@ no_context:
* terminate things with extreme prejudice.
*/
- oops_begin();
+ flags = oops_begin();
if (address < PAGE_SIZE)
printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");
@@ -534,7 +536,7 @@ no_context:
__die("Oops", regs, error_code);
/* Executive summary in case the body of the oops scrolled away */
printk(KERN_EMERG "CR2: %016lx\n", address);
- oops_end();
+ oops_end(flags);
do_exit(SIGKILL);
/*