pkg/email: move patch parsing from pkg/kernel

ParsePatch is used by appengine app.
Appengine apps can't depend on syscall/unsafe,
but pkg/kernel currently does.
Move patch parsing to pkg/email which does not
depend on syscall/unsafe.

1 files changed, 306 insertions, 0 deletions

diff --git a/pkg/email/patch_test.go b/pkg/email/patch_test.go
new file mode 100644
index 000000000..42990effd
--- /dev/null
+++ b/pkg/email/patch_test.go
@@ -0,0 +1,306 @@
+// Copyright 2017 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package email
+
+import (
+	"testing"
+)
+
+func TestParsePatch(t *testing.T) {
+	for _, test := range tests {
+		t.Run(test.title, func(t *testing.T) {
+			title, diff, err := ParsePatch(test.text)
+			if err != nil {
+				t.Fatalf("failed to parse patch: %v", err)
+			}
+			if test.title != title {
+				t.Fatalf("title mismatch, want:\n%v\ngot:\n%v", test.title, title)
+			}
+			if test.diff != diff {
+				t.Fatalf("diff mismatch, want:\n%v\ngot:\n%v", test.diff, diff)
+			}
+		})
+	}
+}
+
+var tests = []struct {
+	text  string
+	title string
+	diff  string
+}{
+	{
+		text: `
+commit 7bdb59aaaaaa4bd7161adc8f923cdef10f2638d1
+Author: Some foo-bar áš <foo@bar.com>
+Date:   Tue Feb 7 17:44:54 2017 +0100
+
+    net/tcp: fix foo()
+    
+    foo->bar is wrong.
+    Fix foo().
+    
+    More description.
+    
+    Signed-off-by: Some foo-bar áš <foo@bar.com>
+    Reviewed: Some foo-bar <foo@bar.com>
+    Link: http://lkml.kernel.org/r/123123123123-123-1-git-send-email-foo@bar.com
+
+diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
+index 74e0388cc88d..fc6f740d0277 100644
+--- a/kernel/time/tick-sched.c
++++ b/kernel/time/tick-sched.c
+@@ -725,6 +725,11 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
+ 		 */
+ 		if (delta == 0) {
+ 			tick_nohz_restart(ts, now);
++			/*
++			 * Make sure next tick stop doesn't get fooled by past
++			 * clock deadline
++			 */
++			ts->next_tick = 0;
+ 			goto out;
+ 		}
+ 	}
+`,
+		title: "net/tcp: fix foo()",
+		diff: `--- a/kernel/time/tick-sched.c
++++ b/kernel/time/tick-sched.c
+@@ -725,6 +725,11 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
+ 		 */
+ 		if (delta == 0) {
+ 			tick_nohz_restart(ts, now);
++			/*
++			 * Make sure next tick stop doesn't get fooled by past
++			 * clock deadline
++			 */
++			ts->next_tick = 0;
+ 			goto out;
+ 		}
+ 	}
+`,
+	},
+
+	{
+		text: `
+fix looking up invalid subclass: 4294967295
+
+diff --git a/net/irda/irqueue.c b/net/irda/irqueue.c
+index acbe61c..160dc89 100644
+--- a/net/irda/irqueue.c
++++ b/net/irda/irqueue.c
+@@ -383,9 +383,6 @@ EXPORT_SYMBOL(hashbin_new);
+  *    for deallocating this structure if it's complex. If not the user can
+  *    just supply kfree, which should take care of the job.
+  */
+-#ifdef CONFIG_LOCKDEP
+-static int hashbin_lock_depth = 0;
+-#endif
+ int hashbin_delete( hashbin_t* hashbin, FREE_FUNC free_func)
+ {
+ 	irda_queue_t* queue;
+`,
+		title: "fix looking up invalid subclass: 4294967295",
+		diff: `--- a/net/irda/irqueue.c
++++ b/net/irda/irqueue.c
+@@ -383,9 +383,6 @@ EXPORT_SYMBOL(hashbin_new);
+  *    for deallocating this structure if it's complex. If not the user can
+  *    just supply kfree, which should take care of the job.
+  */
+-#ifdef CONFIG_LOCKDEP
+-static int hashbin_lock_depth = 0;
+-#endif
+ int hashbin_delete( hashbin_t* hashbin, FREE_FUNC free_func)
+ {
+ 	irda_queue_t* queue;
+`,
+	},
+
+	{
+		text: `net: fix looking up invalid subclass: 4294967295
+diff --git a/net/irda/irqueue.c b/net/irda/irqueue.c
+index acbe61c..160dc89 100644
+--- a/net/irda/irqueue.c
++++ b/net/irda/irqueue.c
+@@ -383,9 +383,6 @@ EXPORT_SYMBOL(hashbin_new);
+  *    for deallocating this structure if it's complex. If not the user can
+  *    just supply kfree, which should take care of the job.
+  */
+-#ifdef CONFIG_LOCKDEP
+-static int hashbin_lock_depth = 0;
+-#endif
+ int hashbin_delete( hashbin_t* hashbin, FREE_FUNC free_func)`,
+		title: "net: fix looking up invalid subclass: 4294967295",
+		diff: `--- a/net/irda/irqueue.c
++++ b/net/irda/irqueue.c
+@@ -383,9 +383,6 @@ EXPORT_SYMBOL(hashbin_new);
+  *    for deallocating this structure if it's complex. If not the user can
+  *    just supply kfree, which should take care of the job.
+  */
+-#ifdef CONFIG_LOCKDEP
+-static int hashbin_lock_depth = 0;
+-#endif
+ int hashbin_delete( hashbin_t* hashbin, FREE_FUNC free_func)
+`,
+	},
+
+	{
+		text: `
+Delivered-To: foo@bar.com
+Date: Tue, 31 Jan 2017 15:24:03 +0100 (CET)
+To: Foo Bar <foo@bar.com>
+Subject: [PATCH v2] timerfd: Protect the might cancel mechanism proper
+MIME-Version: 1.0
+Content-Type: text/plain; charset=US-ASCII
+
+The handling of the might_cancel queueing is not properly protected, so
+parallel operations on the file descriptor can race with each other and
+lead to list corruptions or use after free.
+
+Protect the context for these operations with a seperate lock.
+
+Reported-by: Foo Bar <foo@bar.com>
+Signed-off-by: Foo Bar <foo@bar.com>
+---
+ fs/timerfd.c |   17 ++++++++++++++---
+ 1 file changed, 14 insertions(+), 3 deletions(-)
+
+--- a/fs/timerfd.c
++++ b/fs/timerfd.c
+@@ -40,6 +40,7 @@ struct timerfd_ctx {
+ 	short unsigned settime_flags;	/* to show in fdinfo */
+ 	struct rcu_head rcu;
+ 	struct list_head clist;
++	spinlock_t cancel_lock;
+ 	bool might_cancel;
+ };
+`,
+		title: "timerfd: Protect the might cancel mechanism proper",
+		diff: `--- a/fs/timerfd.c
++++ b/fs/timerfd.c
+@@ -40,6 +40,7 @@ struct timerfd_ctx {
+ 	short unsigned settime_flags;	/* to show in fdinfo */
+ 	struct rcu_head rcu;
+ 	struct list_head clist;
++	spinlock_t cancel_lock;
+ 	bool might_cancel;
+ };
+`,
+	},
+
+	{
+		text: `crypto/sha512-mb: Correct initialization value for lane lens
+diff --git a/arch/x86/crypto/sha512-mb/sha512_mb_mgr_init_avx2.c b/arch/x86/crypto/sha512-mb/sha512_mb_mgr_init_avx2.c
+index 36870b2..5484d77 100644
+--- a/arch/x86/crypto/sha512-mb/sha512_mb_mgr_init_avx2.c
++++ b/arch/x86/crypto/sha512-mb/sha512_mb_mgr_init_avx2.c
+@@ -57,10 +57,10 @@ void sha512_mb_mgr_init_avx2(struct sha512_mb_mgr *state)
+ {
+ 	unsigned int j;
+ 
+-	state->lens[0] = 0;
+-	state->lens[1] = 1;
+-	state->lens[2] = 2;
+-	state->lens[3] = 3;
++	state->lens[0] = 0xFFFFFFFF00000000;
++	state->lens[1] = 0xFFFFFFFF00000001;
++	state->lens[2] = 0xFFFFFFFF00000002;
++	state->lens[3] = 0xFFFFFFFF00000003;
+ 	state->unused_lanes = 0xFF03020100;
+ 	for (j = 0; j < 4; j++)
+ 		state->ldata[j].job_in_lane = NULL;
+-- 
+2.5.5`,
+		title: "crypto/sha512-mb: Correct initialization value for lane lens",
+		diff: `--- a/arch/x86/crypto/sha512-mb/sha512_mb_mgr_init_avx2.c
++++ b/arch/x86/crypto/sha512-mb/sha512_mb_mgr_init_avx2.c
+@@ -57,10 +57,10 @@ void sha512_mb_mgr_init_avx2(struct sha512_mb_mgr *state)
+ {
+ 	unsigned int j;
+ 
+-	state->lens[0] = 0;
+-	state->lens[1] = 1;
+-	state->lens[2] = 2;
+-	state->lens[3] = 3;
++	state->lens[0] = 0xFFFFFFFF00000000;
++	state->lens[1] = 0xFFFFFFFF00000001;
++	state->lens[2] = 0xFFFFFFFF00000002;
++	state->lens[3] = 0xFFFFFFFF00000003;
+ 	state->unused_lanes = 0xFF03020100;
+ 	for (j = 0; j < 4; j++)
+ 		state->ldata[j].job_in_lane = NULL;
+`,
+	},
+
+	{
+		text: `
+Subject: [Patch net] kcm: fix a null pointer dereference in kcm_sendmsg()
+
+--- a/fs/timerfd.c
++++ b/fs/timerfd.c
+@@ -40,6 +40,7 @@ struct timerfd_ctx {
+ 	short unsigned settime_flags;	/* to show in fdinfo */
+ 	struct rcu_head rcu;
+ 	struct list_head clist;
++	spinlock_t cancel_lock;
+ 	bool might_cancel;
+ };
+`,
+		title: "kcm: fix a null pointer dereference in kcm_sendmsg()",
+		diff: `--- a/fs/timerfd.c
++++ b/fs/timerfd.c
+@@ -40,6 +40,7 @@ struct timerfd_ctx {
+ 	short unsigned settime_flags;	/* to show in fdinfo */
+ 	struct rcu_head rcu;
+ 	struct list_head clist;
++	spinlock_t cancel_lock;
+ 	bool might_cancel;
+ };
+`,
+	},
+
+	{
+		text: `
+Subject: Re: [PATCH v3] net/irda: fix lockdep annotation
+
+--- a/fs/timerfd.c
++++ b/fs/timerfd.c
+@@ -40,6 +40,7 @@ struct timerfd_ctx {
+ 	short unsigned settime_flags;	/* to show in fdinfo */
+ 	struct rcu_head rcu;
+ 	struct list_head clist;
++	spinlock_t cancel_lock;
+ 	bool might_cancel;
+ };
+`,
+		title: "net/irda: fix lockdep annotation",
+		diff: `--- a/fs/timerfd.c
++++ b/fs/timerfd.c
+@@ -40,6 +40,7 @@ struct timerfd_ctx {
+ 	short unsigned settime_flags;	/* to show in fdinfo */
+ 	struct rcu_head rcu;
+ 	struct list_head clist;
++	spinlock_t cancel_lock;
+ 	bool might_cancel;
+ };
+`,
+	},
+
+	{
+		text: `syz-dash: first version of dashboard app
+diff --git a/syz-dash/api.go b/syz-dash/api.go
+new file mode 100644
+index 0000000..a1a0499
+--- /dev/null
++++ b/syz-dash/api.go
+@@ -0,0 +1,444 @@
++package dash
+`,
+		title: "syz-dash: first version of dashboard app",
+		diff: `--- /dev/null
++++ b/syz-dash/api.go
+@@ -0,0 +1,444 @@
++package dash
+`,
+	},
+}