Merge branch 'SLE12' into SLE12-SP1
Conflicts:
series.conf
suse-commit: b880c941d809a5987ba6763f8132321b98aeeb8b
diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
index 01f15b2..34713ce 100644
--- a/arch/x86/include/asm/elf.h
+++ b/arch/x86/include/asm/elf.h
@@ -364,6 +364,7 @@
struct va_alignment {
int flags;
unsigned long mask;
+ unsigned long bits;
} ____cacheline_aligned;
extern struct va_alignment va_align;
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 76f78c1..e9dccf5 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -6,6 +6,7 @@
#include <linux/io.h>
#include <linux/sched.h>
+#include <linux/random.h>
#include <asm/processor.h>
#include <asm/apic.h>
#include <asm/cpu.h>
@@ -472,6 +473,9 @@
va_align.mask = (upperbit - 1) & PAGE_MASK;
va_align.flags = ALIGN_VA_32 | ALIGN_VA_64;
+
+ /* A random value per boot for bit slice [12:upper_bit) */
+ va_align.bits = get_random_int() & va_align.mask;
}
}
diff --git a/arch/x86/kernel/sys_x86_64.c b/arch/x86/kernel/sys_x86_64.c
index 30277e2..10e0272 100644
--- a/arch/x86/kernel/sys_x86_64.c
+++ b/arch/x86/kernel/sys_x86_64.c
@@ -34,10 +34,26 @@
return va_align.mask;
}
+/*
+ * To avoid aliasing in the I$ on AMD F15h, the bits defined by the
+ * va_align.bits, [12:upper_bit), are set to a random value instead of
+ * zeroing them. This random value is computed once per boot. This form
+ * of ASLR is known as "per-boot ASLR".
+ *
+ * To achieve this, the random value is added to the info.align_offset
+ * value before calling vm_unmapped_area() or ORed directly to the
+ * address.
+ */
+static unsigned long get_align_bits(void)
+{
+ return va_align.bits & get_align_mask();
+}
+
unsigned long align_vdso_addr(unsigned long addr)
{
unsigned long align_mask = get_align_mask();
- return (addr + align_mask) & ~align_mask;
+ addr = (addr + align_mask) & ~align_mask;
+ return addr | get_align_bits();
}
static int __init control_va_addr_alignment(char *str)
@@ -135,8 +151,12 @@
info.length = len;
info.low_limit = begin;
info.high_limit = end;
- info.align_mask = filp ? get_align_mask() : 0;
+ info.align_mask = 0;
info.align_offset = pgoff << PAGE_SHIFT;
+ if (filp) {
+ info.align_mask = get_align_mask();
+ info.align_offset += get_align_bits();
+ }
return vm_unmapped_area(&info);
}
@@ -174,8 +194,12 @@
info.length = len;
info.low_limit = PAGE_SIZE;
info.high_limit = mm->mmap_base;
- info.align_mask = filp ? get_align_mask() : 0;
+ info.align_mask = 0;
info.align_offset = pgoff << PAGE_SHIFT;
+ if (filp) {
+ info.align_mask = get_align_mask();
+ info.align_offset += get_align_bits();
+ }
addr = vm_unmapped_area(&info);
if (!(addr & ~PAGE_MASK))
return addr;
diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c
index ff42208..2a986f2 100644
--- a/fs/ext4/ext4_jbd2.c
+++ b/fs/ext4/ext4_jbd2.c
@@ -261,10 +261,20 @@
set_buffer_prio(bh);
if (ext4_handle_valid(handle)) {
err = jbd2_journal_dirty_metadata(handle, bh);
- /* Errors can only happen if there is a bug */
- if (WARN_ON_ONCE(err)) {
+ /* Errors can only happen due to aborted journal or a nasty bug */
+ if (!is_handle_aborted(handle) && WARN_ON_ONCE(err)) {
ext4_journal_abort_handle(where, line, __func__, bh,
handle, err);
+ if (inode == NULL) {
+ pr_err("EXT4: jbd2_journal_dirty_metadata "
+ "failed: handle type %u started at "
+ "line %u, credits %u/%u, errcode %d",
+ handle->h_type,
+ handle->h_line_no,
+ handle->h_requested_credits,
+ handle->h_buffer_credits, err);
+ return err;
+ }
ext4_error_inode(inode, where, line,
bh->b_blocknr,
"journal_dirty_metadata failed: "
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 8e79148..6ea5d23 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -704,7 +704,7 @@
read_lock(&journal->j_state_lock);
#ifdef CONFIG_JBD2_DEBUG
if (!tid_geq(journal->j_commit_request, tid)) {
- printk(KERN_EMERG
+ printk(KERN_ERR
"%s: error: j_commit_request=%d, tid=%d\n",
__func__, journal->j_commit_request, tid);
}
@@ -720,10 +720,8 @@
}
read_unlock(&journal->j_state_lock);
- if (unlikely(is_journal_aborted(journal))) {
- printk(KERN_EMERG "journal commit I/O error\n");
+ if (unlikely(is_journal_aborted(journal)))
err = -EIO;
- }
return err;
}
@@ -2665,7 +2663,7 @@
#ifdef CONFIG_JBD2_DEBUG
int n = atomic_read(&nr_journal_heads);
if (n)
- printk(KERN_EMERG "JBD2: leaked %d journal_heads!\n", n);
+ printk(KERN_ERR "JBD2: leaked %d journal_heads!\n", n);
#endif
jbd2_remove_jbd_stats_proc_entry();
jbd2_journal_destroy_caches();
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index 775a9e1..d13f0a8 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -931,7 +931,7 @@
jbd2_alloc(jh2bh(jh)->b_size,
GFP_NOFS);
if (!frozen_buffer) {
- printk(KERN_EMERG
+ printk(KERN_ERR
"%s: OOM for frozen_buffer\n",
__func__);
JBUFFER_TRACE(jh, "oom!");
@@ -1164,7 +1164,7 @@
if (!jh->b_committed_data) {
committed_data = jbd2_alloc(jh2bh(jh)->b_size, GFP_NOFS);
if (!committed_data) {
- printk(KERN_EMERG "%s: No memory for committed data\n",
+ printk(KERN_ERR "%s: No memory for committed data\n",
__func__);
err = -ENOMEM;
goto out;
@@ -1305,9 +1305,9 @@
JBUFFER_TRACE(jh, "fastpath");
if (unlikely(jh->b_transaction !=
journal->j_running_transaction)) {
- printk(KERN_EMERG "JBD: %s: "
+ printk(KERN_ERR "JBD: %s: "
"jh->b_transaction (%llu, %p, %u) != "
- "journal->j_running_transaction (%p, %u)",
+ "journal->j_running_transaction (%p, %u)\n",
journal->j_devname,
(unsigned long long) bh->b_blocknr,
jh->b_transaction,
@@ -1330,30 +1330,25 @@
*/
if (jh->b_transaction != transaction) {
JBUFFER_TRACE(jh, "already on other transaction");
- if (unlikely(jh->b_transaction !=
- journal->j_committing_transaction)) {
- printk(KERN_EMERG "JBD: %s: "
- "jh->b_transaction (%llu, %p, %u) != "
- "journal->j_committing_transaction (%p, %u)",
+ if (unlikely(((jh->b_transaction !=
+ journal->j_committing_transaction)) ||
+ (jh->b_next_transaction != transaction))) {
+ printk(KERN_ERR "jbd2_journal_dirty_metadata: %s: "
+ "bad jh for block %llu: "
+ "transaction (%p, %u), "
+ "jh->b_transaction (%p, %u), "
+ "jh->b_next_transaction (%p, %u), jlist %u\n",
journal->j_devname,
(unsigned long long) bh->b_blocknr,
+ transaction, transaction->t_tid,
jh->b_transaction,
- jh->b_transaction ? jh->b_transaction->t_tid : 0,
- journal->j_committing_transaction,
- journal->j_committing_transaction ?
- journal->j_committing_transaction->t_tid : 0);
- ret = -EINVAL;
- }
- if (unlikely(jh->b_next_transaction != transaction)) {
- printk(KERN_EMERG "JBD: %s: "
- "jh->b_next_transaction (%llu, %p, %u) != "
- "transaction (%p, %u)",
- journal->j_devname,
- (unsigned long long) bh->b_blocknr,
+ jh->b_transaction ?
+ jh->b_transaction->t_tid : 0,
jh->b_next_transaction,
jh->b_next_transaction ?
jh->b_next_transaction->t_tid : 0,
- transaction, transaction->t_tid);
+ jh->b_jlist);
+ WARN_ON(1);
ret = -EINVAL;
}
/* And this case is illegal: we can't reuse another
