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[PATCH 3.16.y-ckt 080/129] ALSA: rawmidi: Make snd_rawmidi_transmit() race-free

From Luis Henriques <luis.henriques@canonical.com>
Newsgroups linux.kernel
Subject [PATCH 3.16.y-ckt 080/129] ALSA: rawmidi: Make snd_rawmidi_transmit() race-free
Date 2016-02-26 11:50 +0100
Message-ID <r6o8d-1Sy-93@gated-at.bofh.it> (permalink)
References <r6nOO-1Jb-5@gated-at.bofh.it>
Organization linux.* mail to news gateway

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3.16.7-ckt25 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Takashi Iwai <tiwai@suse.de>

commit 06ab30034ed9c200a570ab13c017bde248ddb2a6 upstream.

A kernel WARNING in snd_rawmidi_transmit_ack() is triggered by
syzkaller fuzzer:
  WARNING: CPU: 1 PID: 20739 at sound/core/rawmidi.c:1136
Call Trace:
 [<     inline     >] __dump_stack lib/dump_stack.c:15
 [<ffffffff82999e2d>] dump_stack+0x6f/0xa2 lib/dump_stack.c:50
 [<ffffffff81352089>] warn_slowpath_common+0xd9/0x140 kernel/panic.c:482
 [<ffffffff813522b9>] warn_slowpath_null+0x29/0x30 kernel/panic.c:515
 [<ffffffff84f80bd5>] snd_rawmidi_transmit_ack+0x275/0x400 sound/core/rawmidi.c:1136
 [<ffffffff84fdb3c1>] snd_virmidi_output_trigger+0x4b1/0x5a0 sound/core/seq/seq_virmidi.c:163
 [<     inline     >] snd_rawmidi_output_trigger sound/core/rawmidi.c:150
 [<ffffffff84f87ed9>] snd_rawmidi_kernel_write1+0x549/0x780 sound/core/rawmidi.c:1223
 [<ffffffff84f89fd3>] snd_rawmidi_write+0x543/0xb30 sound/core/rawmidi.c:1273
 [<ffffffff817b0323>] __vfs_write+0x113/0x480 fs/read_write.c:528
 [<ffffffff817b1db7>] vfs_write+0x167/0x4a0 fs/read_write.c:577
 [<     inline     >] SYSC_write fs/read_write.c:624
 [<ffffffff817b50a1>] SyS_write+0x111/0x220 fs/read_write.c:616
 [<ffffffff86336c36>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185

Also a similar warning is found but in another path:
Call Trace:
 [<     inline     >] __dump_stack lib/dump_stack.c:15
 [<ffffffff82be2c0d>] dump_stack+0x6f/0xa2 lib/dump_stack.c:50
 [<ffffffff81355139>] warn_slowpath_common+0xd9/0x140 kernel/panic.c:482
 [<ffffffff81355369>] warn_slowpath_null+0x29/0x30 kernel/panic.c:515
 [<ffffffff8527e69a>] rawmidi_transmit_ack+0x24a/0x3b0 sound/core/rawmidi.c:1133
 [<ffffffff8527e851>] snd_rawmidi_transmit_ack+0x51/0x80 sound/core/rawmidi.c:1163
 [<ffffffff852d9046>] snd_virmidi_output_trigger+0x2b6/0x570 sound/core/seq/seq_virmidi.c:185
 [<     inline     >] snd_rawmidi_output_trigger sound/core/rawmidi.c:150
 [<ffffffff85285a0b>] snd_rawmidi_kernel_write1+0x4bb/0x760 sound/core/rawmidi.c:1252
 [<ffffffff85287b73>] snd_rawmidi_write+0x543/0xb30 sound/core/rawmidi.c:1302
 [<ffffffff817ba5f3>] __vfs_write+0x113/0x480 fs/read_write.c:528
 [<ffffffff817bc087>] vfs_write+0x167/0x4a0 fs/read_write.c:577
 [<     inline     >] SYSC_write fs/read_write.c:624
 [<ffffffff817bf371>] SyS_write+0x111/0x220 fs/read_write.c:616
 [<ffffffff86660276>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185

In the former case, the reason is that virmidi has an open code
calling snd_rawmidi_transmit_ack() with the value calculated outside
the spinlock.   We may use snd_rawmidi_transmit() in a loop just for
consuming the input data, but even there, there is a race between
snd_rawmidi_transmit_peek() and snd_rawmidi_tranmit_ack().

Similarly in the latter case, it calls snd_rawmidi_transmit_peek() and
snd_rawmidi_tranmit_ack() separately without protection, so they are
racy as well.

The patch tries to address these issues by the following ways:
- Introduce the unlocked versions of snd_rawmidi_transmit_peek() and
  snd_rawmidi_transmit_ack() to be called inside the explicit lock.
- Rewrite snd_rawmidi_transmit() to be race-free (the former case).
- Make the split calls (the latter case) protected in the rawmidi spin
  lock.

BugLink: http://lkml.kernel.org/r/CACT4Y+YPq1+cYLkadwjWa5XjzF1_Vki1eHnVn-Lm0hzhSpu5PA@mail.gmail.com
BugLink: http://lkml.kernel.org/r/CACT4Y+acG4iyphdOZx47Nyq_VHGbpJQK-6xNpiqUjaZYqsXOGw@mail.gmail.com
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 include/sound/rawmidi.h      |  4 ++
 sound/core/rawmidi.c         | 98 ++++++++++++++++++++++++++++++++------------
 sound/core/seq/seq_virmidi.c | 17 +++++---
 3 files changed, 88 insertions(+), 31 deletions(-)

diff --git a/include/sound/rawmidi.h b/include/sound/rawmidi.h
index 311dafe6cc4b..5bd2bfbf6dd1 100644
--- a/include/sound/rawmidi.h
+++ b/include/sound/rawmidi.h
@@ -165,6 +165,10 @@ int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count);
 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
 			 unsigned char *buffer, int count);
+int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
+			      unsigned char *buffer, int count);
+int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream,
+			       int count);
 
 /* main midi functions */
 
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index 1d9dbed43b84..4a41334a5c13 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -1065,23 +1065,16 @@ int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
 EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
 
 /**
- * snd_rawmidi_transmit_peek - copy data from the internal buffer
+ * __snd_rawmidi_transmit_peek - copy data from the internal buffer
  * @substream: the rawmidi substream
  * @buffer: the buffer pointer
  * @count: data size to transfer
  *
- * Copies data from the internal output buffer to the given buffer.
- *
- * Call this in the interrupt handler when the midi output is ready,
- * and call snd_rawmidi_transmit_ack() after the transmission is
- * finished.
- *
- * Return: The size of copied data, or a negative error code on failure.
+ * This is a variant of snd_rawmidi_transmit_peek() without spinlock.
  */
-int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
+int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
 			      unsigned char *buffer, int count)
 {
-	unsigned long flags;
 	int result, count1;
 	struct snd_rawmidi_runtime *runtime = substream->runtime;
 
@@ -1091,7 +1084,6 @@ int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
 		return -EINVAL;
 	}
 	result = 0;
-	spin_lock_irqsave(&runtime->lock, flags);
 	if (runtime->avail >= runtime->buffer_size) {
 		/* warning: lowlevel layer MUST trigger down the hardware */
 		goto __skip;
@@ -1116,25 +1108,47 @@ int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
 		}
 	}
       __skip:
+	return result;
+}
+EXPORT_SYMBOL(__snd_rawmidi_transmit_peek);
+
+/**
+ * snd_rawmidi_transmit_peek - copy data from the internal buffer
+ * @substream: the rawmidi substream
+ * @buffer: the buffer pointer
+ * @count: data size to transfer
+ *
+ * Copies data from the internal output buffer to the given buffer.
+ *
+ * Call this in the interrupt handler when the midi output is ready,
+ * and call snd_rawmidi_transmit_ack() after the transmission is
+ * finished.
+ *
+ * Return: The size of copied data, or a negative error code on failure.
+ */
+int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
+			      unsigned char *buffer, int count)
+{
+	struct snd_rawmidi_runtime *runtime = substream->runtime;
+	int result;
+	unsigned long flags;
+
+	spin_lock_irqsave(&runtime->lock, flags);
+	result = __snd_rawmidi_transmit_peek(substream, buffer, count);
 	spin_unlock_irqrestore(&runtime->lock, flags);
 	return result;
 }
 EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
 
 /**
- * snd_rawmidi_transmit_ack - acknowledge the transmission
+ * __snd_rawmidi_transmit_ack - acknowledge the transmission
  * @substream: the rawmidi substream
  * @count: the transferred count
  *
- * Advances the hardware pointer for the internal output buffer with
- * the given size and updates the condition.
- * Call after the transmission is finished.
- *
- * Return: The advanced size if successful, or a negative error code on failure.
+ * This is a variant of __snd_rawmidi_transmit_ack() without spinlock.
  */
-int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
+int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
 {
-	unsigned long flags;
 	struct snd_rawmidi_runtime *runtime = substream->runtime;
 
 	if (runtime->buffer == NULL) {
@@ -1142,7 +1156,6 @@ int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
 			  "snd_rawmidi_transmit_ack: output is not active!!!\n");
 		return -EINVAL;
 	}
-	spin_lock_irqsave(&runtime->lock, flags);
 	snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
 	runtime->hw_ptr += count;
 	runtime->hw_ptr %= runtime->buffer_size;
@@ -1152,9 +1165,32 @@ int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
 		if (runtime->drain || snd_rawmidi_ready(substream))
 			wake_up(&runtime->sleep);
 	}
-	spin_unlock_irqrestore(&runtime->lock, flags);
 	return count;
 }
+EXPORT_SYMBOL(__snd_rawmidi_transmit_ack);
+
+/**
+ * snd_rawmidi_transmit_ack - acknowledge the transmission
+ * @substream: the rawmidi substream
+ * @count: the transferred count
+ *
+ * Advances the hardware pointer for the internal output buffer with
+ * the given size and updates the condition.
+ * Call after the transmission is finished.
+ *
+ * Return: The advanced size if successful, or a negative error code on failure.
+ */
+int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
+{
+	struct snd_rawmidi_runtime *runtime = substream->runtime;
+	int result;
+	unsigned long flags;
+
+	spin_lock_irqsave(&runtime->lock, flags);
+	result = __snd_rawmidi_transmit_ack(substream, count);
+	spin_unlock_irqrestore(&runtime->lock, flags);
+	return result;
+}
 EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
 
 /**
@@ -1170,12 +1206,22 @@ EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
 			 unsigned char *buffer, int count)
 {
+	struct snd_rawmidi_runtime *runtime = substream->runtime;
+	int result;
+	unsigned long flags;
+
+	spin_lock_irqsave(&runtime->lock, flags);
 	if (!substream->opened)
-		return -EBADFD;
-	count = snd_rawmidi_transmit_peek(substream, buffer, count);
-	if (count < 0)
-		return count;
-	return snd_rawmidi_transmit_ack(substream, count);
+		result = -EBADFD;
+	else {
+		count = __snd_rawmidi_transmit_peek(substream, buffer, count);
+		if (count <= 0)
+			result = count;
+		else
+			result = __snd_rawmidi_transmit_ack(substream, count);
+	}
+	spin_unlock_irqrestore(&runtime->lock, flags);
+	return result;
 }
 EXPORT_SYMBOL(snd_rawmidi_transmit);
 
diff --git a/sound/core/seq/seq_virmidi.c b/sound/core/seq/seq_virmidi.c
index f2975927551e..81134e067184 100644
--- a/sound/core/seq/seq_virmidi.c
+++ b/sound/core/seq/seq_virmidi.c
@@ -155,21 +155,26 @@ static void snd_virmidi_output_trigger(struct snd_rawmidi_substream *substream,
 	struct snd_virmidi *vmidi = substream->runtime->private_data;
 	int count, res;
 	unsigned char buf[32], *pbuf;
+	unsigned long flags;
 
 	if (up) {
 		vmidi->trigger = 1;
 		if (vmidi->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH &&
 		    !(vmidi->rdev->flags & SNDRV_VIRMIDI_SUBSCRIBE)) {
-			snd_rawmidi_transmit_ack(substream, substream->runtime->buffer_size - substream->runtime->avail);
-			return;		/* ignored */
+			while (snd_rawmidi_transmit(substream, buf,
+						    sizeof(buf)) > 0) {
+				/* ignored */
+			}
+			return;
 		}
 		if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) {
 			if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0)
 				return;
 			vmidi->event.type = SNDRV_SEQ_EVENT_NONE;
 		}
+		spin_lock_irqsave(&substream->runtime->lock, flags);
 		while (1) {
-			count = snd_rawmidi_transmit_peek(substream, buf, sizeof(buf));
+			count = __snd_rawmidi_transmit_peek(substream, buf, sizeof(buf));
 			if (count <= 0)
 				break;
 			pbuf = buf;
@@ -179,16 +184,18 @@ static void snd_virmidi_output_trigger(struct snd_rawmidi_substream *substream,
 					snd_midi_event_reset_encode(vmidi->parser);
 					continue;
 				}
-				snd_rawmidi_transmit_ack(substream, res);
+				__snd_rawmidi_transmit_ack(substream, res);
 				pbuf += res;
 				count -= res;
 				if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) {
 					if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0)
-						return;
+						goto out;
 					vmidi->event.type = SNDRV_SEQ_EVENT_NONE;
 				}
 			}
 		}
+	out:
+		spin_unlock_irqrestore(&substream->runtime->lock, flags);
 	} else {
 		vmidi->trigger = 0;
 	}

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  [PATCH 3.16.y-ckt 046/129] crypto: algif_hash - Require setkey before accept(2) Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 067/129] intel_scu_ipcutil: underflow in scu_reg_access() Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 056/129] cgroup: make sure a parent css isn't offlined before its children Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 063/129] target: Fix WRITE_SAME/DISCARD conversion to linux 512b sectors Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 060/129] rfkill: fix rfkill_fop_read wait_event usage Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 044/129] crypto: algif_skcipher - Require setkey before accept(2) Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 053/129] iio: add HAS_IOMEM dependency to VF610_ADC Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 043/129] umount: Do not allow unmounting rootfs. Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 055/129] ASoC: rt5645: fix the shift bit of IN1 boost Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 048/129] crypto: algif_skcipher - Add key check exception for cipher_null Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 054/129] iio: dac: mcp4725: set iio name property in sysfs Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 051/129] crypto: algif_hash - Fix race condition in hash_check_key Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 050/129] crypto: algif_skcipher - Remove custom release parent function Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 061/129] crypto: shash - Fix has_key setting Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 062/129] drm/i915/dp: fall back to 18 bpp when sink capability is unknown Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 065/129] iio: inkern: fix a NULL dereference on error Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 059/129] mac80211: Requeue work after scan complete for all VIF types. Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 066/129] iio: pressure: mpl115: fix temperature offset sign Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 058/129] libata: disable forced PORTS_IMPL for >= AHCI 1.3 Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 064/129] crypto: algif_hash - wait for crypto_ahash_init() to complete Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 052/129] crypto: algif_skcipher - Fix race condition in skcipher_check_key Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 042/129] Revert "workqueue: make sure delayed work run in local cpu" Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 068/129] ALSA: seq: Fix race at closing in virmidi driver Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 024/129] USB: serial: ftdi_sio: add support for Yaesu SCU-18 cable Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 039/129] perf hists: Fix HISTC_MEM_DCACHELINE width setting Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 020/129] USB: visor: fix null-deref at probe Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 033/129] n_tty: Fix unsafe reference to "other" ldisc Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 027/129] ALSA: usb-audio: Fix TEAC UD-501/UD-503/NT-503 usb delay Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 012/129] KVM: PPC: Fix emulation of H_SET_DABR/X on POWER8 Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 049/129] crypto: algif_hash - Remove custom release parent function Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 036/129] drm/vmwgfx: respect 'nomodeset' Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 019/129] USB: cp210x: add ID for IAI USB to RS485 adaptor Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 014/129] ACPI / PCI / hotplug: unlock in error path in acpiphp_enable_slot() Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 031/129] powerpc/eeh: Fix PE location code Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 047/129] crypto: skcipher - Add crypto_skcipher_has_setkey Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 032/129] SCSI: fix crashes in sd and sr runtime PM Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 018/129] usb: hub: do not clear BOS field during reset device Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 022/129] ALSA: seq: Fix incorrect sanity check at snd_seq_oss_synth_cleanup() Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 009/129] EVM: Use crypto_memneq() for digest comparisons Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 023/129] ALSA: seq: Degrade the error message for too many opens Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 040/129] powerpc/perf: Remove PPMU_HAS_SSLOT flag for Power8 Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 008/129] iw_cxgb3: Fix incorrectly returning error on success Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 028/129] virtio_pci: fix use after free on release Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 030/129] arm64: errata: Add -mpc-relative-literal-loads to build flags Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 010/129] ALSA: usb-audio: avoid freeing umidi object twice Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 029/129] ALSA: bebob: Use a signed return type for get_formation_index Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 015/129] usb: cdc-acm: handle unlinked urb in acm read callback Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 017/129] cdc-acm:exclude Samsung phone 04e8:685d Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 035/129] ALSA: dummy: Disable switching timer backend via sysfs Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 025/129] USB: option: fix Cinterion AHxx enumeration Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 021/129] USB: serial: option: Adding support for Telit LE922 Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 016/129] usb: cdc-acm: send zero packet for intel 7260 modem Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 034/129] staging/speakup: Use tty_ldisc_ref() for paste kworker Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 038/129] perf annotate browser: Fix behaviour of Shift-Tab with nothing focussed Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 005/129] USB: serial: visor: fix crash on detecting device without write_urbs Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 007/129] qeth: initialize net_device with carrier off Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 011/129] iio: adis_buffer: Fix out-of-bounds memory access Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 002/129] [media] usbvision: fix leak of usb_dev on failure paths in usbvision_probe() Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 003/129] [media] usbvision: fix crash on detecting device with invalid configuration Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 004/129] tty: Fix unsafe ldisc reference via ioctl(TIOCGETD) Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 006/129] ASN.1: Fix non-match detection failure on data overrun Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 131/131] net: phy: Avoid polling PHY with PHY_IGNORE_INTERRUPTS Luis Henriques <luis.henriques@canonical.com> - 2016-02-29 12:40 +0100
  [PATCH 3.16.y-ckt 130/131] net: phy: fix PHY_RUNNING in phy_state_machine Luis Henriques <luis.henriques@canonical.com> - 2016-02-29 12:40 +0100

csiph-web