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authorIngo Molnar <mingo@elte.hu>2009-02-20 23:00:29 +0100
committerIngo Molnar <mingo@elte.hu>2009-02-21 00:09:43 +0100
commit8f7661496cece8320137d5e26808825498fd2b26 (patch)
tree7106ad6fb26f958b5c2e2ff87bec61e9245e336f /arch/x86/mm/fault.c
parentf2f13a8535174dbb813a0607a9d4737cfba98f6c (diff)
downloadop-kernel-dev-8f7661496cece8320137d5e26808825498fd2b26.zip
op-kernel-dev-8f7661496cece8320137d5e26808825498fd2b26.tar.gz
x86, mm: fault.c, unify oops printing
Impact: refine/extend page fault related oops printing on 64-bit - honor the pause_on_oops logic on 64-bit too - print out NX fault warnings on 64-bit as well - factor out the NX fault message to make it git-greppable and readable Note that this means that we do the PF_INSTR check on 32-bit non-PAE as well where it should not occur ... normally. Cannot hurt. Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm/fault.c')
-rw-r--r--arch/x86/mm/fault.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 4ce62fb..ebfaca3 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -595,28 +595,24 @@ static int is_f00f_bug(struct pt_regs *regs, unsigned long address)
return 0;
}
+static const char nx_warning[] = KERN_CRIT
+"kernel tried to execute NX-protected page - exploit attempt? (uid: %d)\n";
+
static void
show_fault_oops(struct pt_regs *regs, unsigned long error_code,
unsigned long address)
{
-#ifdef CONFIG_X86_32
if (!oops_may_print())
return;
-#endif
-#ifdef CONFIG_X86_PAE
if (error_code & PF_INSTR) {
unsigned int level;
pte_t *pte = lookup_address(address, &level);
- if (pte && pte_present(*pte) && !pte_exec(*pte)) {
- printk(KERN_CRIT "kernel tried to execute "
- "NX-protected page - exploit attempt? "
- "(uid: %d)\n", current_uid());
- }
+ if (pte && pte_present(*pte) && !pte_exec(*pte))
+ printk(nx_warning, current_uid());
}
-#endif
printk(KERN_ALERT "BUG: unable to handle kernel ");
if (address < PAGE_SIZE)
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