diff options
| author | Helge Deller <deller@gmx.de> | 2016-04-08 18:32:52 +0200 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-04-20 01:08:54 -0400 |
| commit | e213cce42b7107f64521eb1434e9dd5637ad777b (patch) | |
| tree | 5fb187bd8755f013c8a77ce795e333aae9240336 /arch/parisc/mm/fault.c | |
| parent | 9ccccafe228ec2a71a6df4268ce95c27e3d3c8cf (diff) | |
parisc: Unbreak handling exceptions from kernel modules
[ Upstream commit 2ef4dfd9d9f288943e249b78365a69e3ea3ec072 ]
Handling exceptions from modules never worked on parisc.
It was just masked by the fact that exceptions from modules
don't happen during normal use.
When a module triggers an exception in get_user() we need to load the
main kernel dp value before accessing the exception_data structure, and
afterwards restore the original dp value of the module on exit.
Noticed-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'arch/parisc/mm/fault.c')
| -rw-r--r-- | arch/parisc/mm/fault.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c index e5120e653240..50d64a7fc672 100644 --- a/arch/parisc/mm/fault.c +++ b/arch/parisc/mm/fault.c @@ -151,6 +151,7 @@ int fixup_exception(struct pt_regs *regs) struct exception_data *d; d = this_cpu_ptr(&exception_data); d->fault_ip = regs->iaoq[0]; + d->fault_gp = regs->gr[27]; d->fault_space = regs->isr; d->fault_addr = regs->ior; |