diff options
| author | H. Peter Anvin <hpa@linux.intel.com> | 2012-10-19 07:54:24 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-10-19 07:55:09 -0700 |
| commit | 4533d86270d7986e00594495dde9a109d6be27ae (patch) | |
| tree | c2473cac653f7b98e5bd5e6475e63734be4b7644 /arch/powerpc/mm/fault.c | |
| parent | 21c5e50e15b1abd797e62f18fd7f90b9cc004cbd (diff) | |
| parent | 5bc66170dc486556a1e36fd384463536573f4b82 (diff) | |
Merge commit '5bc66170dc486556a1e36fd384463536573f4b82' into x86/urgent
From Borislav Petkov <bp@amd64.org>:
Below is a RAS fix which reverts the addition of a sysfs attribute
which we agreed is not needed, post-factum. And this should go in now
because that sysfs attribute is going to end up in 3.7 otherwise and
thus exposed to userspace; removing it then would be a lot harder.
This is done as a merge rather than a simple patch/cherry-pick since
the baseline for this patch was not in the previous x86/urgent.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/powerpc/mm/fault.c')
| -rw-r--r-- | arch/powerpc/mm/fault.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index 08ffcf52a85..0a6b28336eb 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -133,6 +133,7 @@ static int do_sigbus(struct pt_regs *regs, unsigned long address) up_read(¤t->mm->mmap_sem); if (user_mode(regs)) { + current->thread.trap_nr = BUS_ADRERR; info.si_signo = SIGBUS; info.si_errno = 0; info.si_code = BUS_ADRERR; @@ -450,6 +451,7 @@ good_area: /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk * of starvation. */ flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; goto retry; } } @@ -470,7 +472,7 @@ bad_area_nosemaphore: if (is_exec && (error_code & DSISR_PROTFAULT)) printk_ratelimited(KERN_CRIT "kernel tried to execute NX-protected" " page (%lx) - exploit attempt? (uid: %d)\n", - address, current_uid()); + address, from_kuid(&init_user_ns, current_uid())); return SIGSEGV; |