Re: Linux 5.10.81

From: Greg Kroah-Hartman
Date: Sun Nov 21 2021 - 08:11:57 EST

diff --git a/Makefile b/Makefile
index 71fdc74801e0..1baeadb574f1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
VERSION = 5
PATCHLEVEL = 10
-SUBLEVEL = 80
+SUBLEVEL = 81
EXTRAVERSION =
NAME = Dare mighty things

diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 9c76d50a5654..3da39140babc 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -1849,7 +1849,7 @@ syscall_restore:

/* Are we being ptraced? */
LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19
- ldi _TIF_SYSCALL_TRACE_MASK,%r2
+ ldi _TIF_SINGLESTEP|_TIF_BLOCKSTEP,%r2
and,COND(=) %r19,%r2,%r0
b,n syscall_restore_rfi

diff --git a/arch/x86/include/asm/insn-eval.h b/arch/x86/include/asm/insn-eval.h
index 98b4dae5e8bc..c1438f9239e4 100644
--- a/arch/x86/include/asm/insn-eval.h
+++ b/arch/x86/include/asm/insn-eval.h
@@ -21,6 +21,7 @@ int insn_get_modrm_rm_off(struct insn *insn, struct pt_regs *regs);
int insn_get_modrm_reg_off(struct insn *insn, struct pt_regs *regs);
unsigned long insn_get_seg_base(struct pt_regs *regs, int seg_reg_idx);
int insn_get_code_seg_params(struct pt_regs *regs);
+unsigned long insn_get_effective_ip(struct pt_regs *regs);
int insn_fetch_from_user(struct pt_regs *regs,
unsigned char buf[MAX_INSN_SIZE]);
int insn_fetch_from_user_inatomic(struct pt_regs *regs,
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 50d02db72317..d428d611a43a 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -534,6 +534,7 @@ struct thread_struct {
*/
unsigned long iopl_emul;

+ unsigned int iopl_warn:1;
unsigned int sig_on_uaccess_err:1;

/* Floating point and extended processor state */
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 145a7ac0c19a..0aa1baf9a3af 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -138,6 +138,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg,
frame->ret_addr = (unsigned long) ret_from_fork;
p->thread.sp = (unsigned long) fork_frame;
p->thread.io_bitmap = NULL;
+ p->thread.iopl_warn = 0;
memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps));

#ifdef CONFIG_X86_64
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 143fcb8af38f..2d4ecd50e69b 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -523,6 +523,37 @@ static enum kernel_gp_hint get_kernel_gp_address(struct pt_regs *regs,

#define GPFSTR "general protection fault"

+static bool fixup_iopl_exception(struct pt_regs *regs)
+{
+ struct thread_struct *t = &current->thread;
+ unsigned char byte;
+ unsigned long ip;
+
+ if (!IS_ENABLED(CONFIG_X86_IOPL_IOPERM) || t->iopl_emul != 3)
+ return false;
+
+ ip = insn_get_effective_ip(regs);
+ if (!ip)
+ return false;
+
+ if (get_user(byte, (const char __user *)ip))
+ return false;
+
+ if (byte != 0xfa && byte != 0xfb)
+ return false;
+
+ if (!t->iopl_warn && printk_ratelimit()) {
+ pr_err("%s[%d] attempts to use CLI/STI, pretending it's a NOP, ip:%lx",
+ current->comm, task_pid_nr(current), ip);
+ print_vma_addr(KERN_CONT " in ", ip);
+ pr_cont("\n");
+ t->iopl_warn = 1;
+ }
+
+ regs->ip += 1;
+ return true;
+}
+
DEFINE_IDTENTRY_ERRORCODE(exc_general_protection)
{
char desc[sizeof(GPFSTR) + 50 + 2*sizeof(unsigned long) + 1] = GPFSTR;
@@ -548,6 +579,9 @@ DEFINE_IDTENTRY_ERRORCODE(exc_general_protection)
tsk = current;

if (user_mode(regs)) {
+ if (fixup_iopl_exception(regs))
+ goto exit;
+
tsk->thread.error_code = error_code;
tsk->thread.trap_nr = X86_TRAP_GP;

diff --git a/arch/x86/lib/insn-eval.c b/arch/x86/lib/insn-eval.c
index bb0b3fe1e0a0..c6a19c88af54 100644
--- a/arch/x86/lib/insn-eval.c
+++ b/arch/x86/lib/insn-eval.c
@@ -1415,7 +1415,7 @@ void __user *insn_get_addr_ref(struct insn *insn, struct pt_regs *regs)
}
}

-static unsigned long insn_get_effective_ip(struct pt_regs *regs)
+unsigned long insn_get_effective_ip(struct pt_regs *regs)
{
unsigned long seg_base = 0;

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index f0fa0c8e7ec6..ee537a9f1d1a 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -228,19 +228,6 @@ static void __loop_update_dio(struct loop_device *lo, bool dio)
blk_mq_unfreeze_queue(lo->lo_queue);
}

-/**
- * loop_validate_block_size() - validates the passed in block size
- * @bsize: size to validate
- */
-static int
-loop_validate_block_size(unsigned short bsize)
-{
- if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize))
- return -EINVAL;
-
- return 0;
-}
-
/**
* loop_set_size() - sets device size and notifies userspace
* @lo: struct loop_device to set the size for
@@ -1121,7 +1108,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
}

if (config->block_size) {
- error = loop_validate_block_size(config->block_size);
+ error = blk_validate_block_size(config->block_size);
if (error)
goto out_unlock;
}
@@ -1617,7 +1604,7 @@ static int loop_set_block_size(struct loop_device *lo, unsigned long arg)
if (lo->lo_state != Lo_bound)
return -ENXIO;

- err = loop_validate_block_size(arg);
+ err = blk_validate_block_size(arg);
if (err)
return err;

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 6ef30252bfe0..143b2cb13bf9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -21,7 +21,6 @@
#include <linux/delay.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
-#include <linux/pm_runtime.h>

#include "stmmac_platform.h"

@@ -1336,9 +1335,6 @@ static int rk_gmac_powerup(struct rk_priv_data *bsp_priv)
return ret;
}

- pm_runtime_enable(dev);
- pm_runtime_get_sync(dev);
-
if (bsp_priv->integrated_phy)
rk_gmac_integrated_phy_powerup(bsp_priv);

@@ -1347,14 +1343,9 @@ static int rk_gmac_powerup(struct rk_priv_data *bsp_priv)

static void rk_gmac_powerdown(struct rk_priv_data *gmac)
{
- struct device *dev = &gmac->pdev->dev;
-
if (gmac->integrated_phy)
rk_gmac_integrated_phy_powerdown(gmac);

- pm_runtime_put_sync(dev);
- pm_runtime_disable(dev);
-
phy_power_on(gmac, false);
gmac_clk_enable(gmac, false);
}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index 727e68dfaf1c..a4ca283e0228 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -270,6 +270,7 @@ void stmmac_disable_eee_mode(struct stmmac_priv *priv);
bool stmmac_eee_init(struct stmmac_priv *priv);
int stmmac_reinit_queues(struct net_device *dev, u32 rx_cnt, u32 tx_cnt);
int stmmac_reinit_ringparam(struct net_device *dev, u32 rx_size, u32 tx_size);
+int stmmac_bus_clks_config(struct stmmac_priv *priv, bool enabled);

#if IS_ENABLED(CONFIG_STMMAC_SELFTESTS)
void stmmac_selftest_run(struct net_device *dev,
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 0ac61e7ab43c..4a75e73f06bb 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -28,6 +28,7 @@
#include <linux/if_vlan.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
+#include <linux/pm_runtime.h>
#include <linux/prefetch.h>
#include <linux/pinctrl/consumer.h>
#ifdef CONFIG_DEBUG_FS
@@ -113,6 +114,28 @@ static void stmmac_exit_fs(struct net_device *dev);

#define STMMAC_COAL_TIMER(x) (jiffies + usecs_to_jiffies(x))

+int stmmac_bus_clks_config(struct stmmac_priv *priv, bool enabled)
+{
+ int ret = 0;
+
+ if (enabled) {
+ ret = clk_prepare_enable(priv->plat->stmmac_clk);
+ if (ret)
+ return ret;
+ ret = clk_prepare_enable(priv->plat->pclk);
+ if (ret) {
+ clk_disable_unprepare(priv->plat->stmmac_clk);
+ return ret;
+ }
+ } else {
+ clk_disable_unprepare(priv->plat->stmmac_clk);
+ clk_disable_unprepare(priv->plat->pclk);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(stmmac_bus_clks_config);
+
/**
* stmmac_verify_args - verify the driver parameters.
* Description: it checks the driver parameters and set a default in case of
@@ -2792,6 +2815,12 @@ static int stmmac_open(struct net_device *dev)
u32 chan;
int ret;

+ ret = pm_runtime_get_sync(priv->device);
+ if (ret < 0) {
+ pm_runtime_put_noidle(priv->device);
+ return ret;
+ }
+
if (priv->hw->pcs != STMMAC_PCS_TBI &&
priv->hw->pcs != STMMAC_PCS_RTBI &&
priv->hw->xpcs == NULL) {
@@ -2800,7 +2829,7 @@ static int stmmac_open(struct net_device *dev)
netdev_err(priv->dev,
"%s: Cannot attach to PHY (error: %d)\n",
__func__, ret);
- return ret;
+ goto init_phy_error;
}
}

@@ -2915,6 +2944,8 @@ static int stmmac_open(struct net_device *dev)
free_dma_desc_resources(priv);
dma_desc_error:
phylink_disconnect_phy(priv->phylink);
+init_phy_error:
+ pm_runtime_put(priv->device);
return ret;
}

@@ -2965,6 +2996,8 @@ static int stmmac_release(struct net_device *dev)

stmmac_release_ptp(priv);

+ pm_runtime_put(priv->device);
+
return 0;
}

@@ -4291,12 +4324,21 @@ static int stmmac_set_mac_address(struct net_device *ndev, void *addr)
struct stmmac_priv *priv = netdev_priv(ndev);
int ret = 0;

+ ret = pm_runtime_get_sync(priv->device);
+ if (ret < 0) {
+ pm_runtime_put_noidle(priv->device);
+ return ret;
+ }
+
ret = eth_mac_addr(ndev, addr);
if (ret)
- return ret;
+ goto set_mac_error;

stmmac_set_umac_addr(priv, priv->hw, ndev->dev_addr, 0);

+set_mac_error:
+ pm_runtime_put(priv->device);
+
return ret;
}

@@ -4616,6 +4658,12 @@ static int stmmac_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vi
bool is_double = false;
int ret;

+ ret = pm_runtime_get_sync(priv->device);
+ if (ret < 0) {
+ pm_runtime_put_noidle(priv->device);
+ return ret;
+ }
+
if (be16_to_cpu(proto) == ETH_P_8021AD)
is_double = true;

@@ -4624,10 +4672,15 @@ static int stmmac_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vi
if (priv->hw->num_vlan) {
ret = stmmac_del_hw_vlan_rx_fltr(priv, ndev, priv->hw, proto, vid);
if (ret)
- return ret;
+ goto del_vlan_error;
}

- return stmmac_vlan_update(priv, is_double);
+ ret = stmmac_vlan_update(priv, is_double);
+
+del_vlan_error:
+ pm_runtime_put(priv->device);
+
+ return ret;
}

static const struct net_device_ops stmmac_netdev_ops = {
@@ -5066,6 +5119,10 @@ int stmmac_dvr_probe(struct device *device,

stmmac_check_pcs_mode(priv);

+ pm_runtime_get_noresume(device);
+ pm_runtime_set_active(device);
+ pm_runtime_enable(device);
+
if (priv->hw->pcs != STMMAC_PCS_TBI &&
priv->hw->pcs != STMMAC_PCS_RTBI) {
/* MDIO bus Registration */
@@ -5103,6 +5160,11 @@ int stmmac_dvr_probe(struct device *device,
stmmac_init_fs(ndev);
#endif

+ /* Let pm_runtime_put() disable the clocks.
+ * If CONFIG_PM is not enabled, the clocks will stay powered.
+ */
+ pm_runtime_put(device);
+
return ret;

error_serdes_powerup:
@@ -5152,8 +5214,8 @@ int stmmac_dvr_remove(struct device *dev)
phylink_destroy(priv->phylink);
if (priv->plat->stmmac_rst)
reset_control_assert(priv->plat->stmmac_rst);
- clk_disable_unprepare(priv->plat->pclk);
- clk_disable_unprepare(priv->plat->stmmac_clk);
+ pm_runtime_put(dev);
+ pm_runtime_disable(dev);
if (priv->hw->pcs != STMMAC_PCS_TBI &&
priv->hw->pcs != STMMAC_PCS_RTBI)
stmmac_mdio_unregister(ndev);
@@ -5176,6 +5238,7 @@ int stmmac_suspend(struct device *dev)
struct net_device *ndev = dev_get_drvdata(dev);
struct stmmac_priv *priv = netdev_priv(ndev);
u32 chan;
+ int ret;

if (!ndev || !netif_running(ndev))
return 0;
@@ -5219,8 +5282,11 @@ int stmmac_suspend(struct device *dev)
pinctrl_pm_select_sleep_state(priv->device);
/* Disable clock in case of PWM is off */
clk_disable_unprepare(priv->plat->clk_ptp_ref);
- clk_disable_unprepare(priv->plat->pclk);
- clk_disable_unprepare(priv->plat->stmmac_clk);
+ ret = pm_runtime_force_suspend(dev);
+ if (ret) {
+ mutex_unlock(&priv->lock);
+ return ret;
+ }
}
mutex_unlock(&priv->lock);

@@ -5286,8 +5352,9 @@ int stmmac_resume(struct device *dev)
} else {
pinctrl_pm_select_default_state(priv->device);
/* enable the clk previously disabled */
- clk_prepare_enable(priv->plat->stmmac_clk);
- clk_prepare_enable(priv->plat->pclk);
+ ret = pm_runtime_force_resume(dev);
+ if (ret)
+ return ret;
if (priv->plat->clk_ptp_ref)
clk_prepare_enable(priv->plat->clk_ptp_ref);
/* reset the phy so that it's ready */
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index 678726c62a8a..7c1a14b256da 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -15,6 +15,7 @@
#include <linux/iopoll.h>
#include <linux/mii.h>
#include <linux/of_mdio.h>
+#include <linux/pm_runtime.h>
#include <linux/phy.h>
#include <linux/property.h>
#include <linux/slab.h>
@@ -87,21 +88,29 @@ static int stmmac_xgmac2_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg)
u32 tmp, addr, value = MII_XGMAC_BUSY;
int ret;

+ ret = pm_runtime_get_sync(priv->device);
+ if (ret < 0) {
+ pm_runtime_put_noidle(priv->device);
+ return ret;
+ }
+
/* Wait until any existing MII operation is complete */
if (readl_poll_timeout(priv->ioaddr + mii_data, tmp,
- !(tmp & MII_XGMAC_BUSY), 100, 10000))
- return -EBUSY;
+ !(tmp & MII_XGMAC_BUSY), 100, 10000)) {
+ ret = -EBUSY;
+ goto err_disable_clks;
+ }

if (phyreg & MII_ADDR_C45) {
phyreg &= ~MII_ADDR_C45;

ret = stmmac_xgmac2_c45_format(priv, phyaddr, phyreg, &addr);
if (ret)
- return ret;
+ goto err_disable_clks;
} else {
ret = stmmac_xgmac2_c22_format(priv, phyaddr, phyreg, &addr);
if (ret)
- return ret;
+ goto err_disable_clks;

value |= MII_XGMAC_SADDR;
}
@@ -112,8 +121,10 @@ static int stmmac_xgmac2_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg)

/* Wait until any existing MII operation is complete */
if (readl_poll_timeout(priv->ioaddr + mii_data, tmp,
- !(tmp & MII_XGMAC_BUSY), 100, 10000))
- return -EBUSY;
+ !(tmp & MII_XGMAC_BUSY), 100, 10000)) {
+ ret = -EBUSY;
+ goto err_disable_clks;
+ }

/* Set the MII address register to read */
writel(addr, priv->ioaddr + mii_address);
@@ -121,11 +132,18 @@ static int stmmac_xgmac2_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg)

/* Wait until any existing MII operation is complete */
if (readl_poll_timeout(priv->ioaddr + mii_data, tmp,
- !(tmp & MII_XGMAC_BUSY), 100, 10000))
- return -EBUSY;
+ !(tmp & MII_XGMAC_BUSY), 100, 10000)) {
+ ret = -EBUSY;
+ goto err_disable_clks;
+ }

/* Read the data from the MII data register */
- return readl(priv->ioaddr + mii_data) & GENMASK(15, 0);
+ ret = (int)readl(priv->ioaddr + mii_data) & GENMASK(15, 0);
+
+err_disable_clks:
+ pm_runtime_put(priv->device);
+
+ return ret;
}

static int stmmac_xgmac2_mdio_write(struct mii_bus *bus, int phyaddr,
@@ -138,21 +156,29 @@ static int stmmac_xgmac2_mdio_write(struct mii_bus *bus, int phyaddr,
u32 addr, tmp, value = MII_XGMAC_BUSY;
int ret;

+ ret = pm_runtime_get_sync(priv->device);
+ if (ret < 0) {
+ pm_runtime_put_noidle(priv->device);
+ return ret;
+ }
+
/* Wait until any existing MII operation is complete */
if (readl_poll_timeout(priv->ioaddr + mii_data, tmp,
- !(tmp & MII_XGMAC_BUSY), 100, 10000))
- return -EBUSY;
+ !(tmp & MII_XGMAC_BUSY), 100, 10000)) {
+ ret = -EBUSY;
+ goto err_disable_clks;
+ }

if (phyreg & MII_ADDR_C45) {
phyreg &= ~MII_ADDR_C45;

ret = stmmac_xgmac2_c45_format(priv, phyaddr, phyreg, &addr);
if (ret)
- return ret;
+ goto err_disable_clks;
} else {
ret = stmmac_xgmac2_c22_format(priv, phyaddr, phyreg, &addr);
if (ret)
- return ret;
+ goto err_disable_clks;

value |= MII_XGMAC_SADDR;
}
@@ -164,16 +190,23 @@ static int stmmac_xgmac2_mdio_write(struct mii_bus *bus, int phyaddr,

/* Wait until any existing MII operation is complete */
if (readl_poll_timeout(priv->ioaddr + mii_data, tmp,
- !(tmp & MII_XGMAC_BUSY), 100, 10000))
- return -EBUSY;
+ !(tmp & MII_XGMAC_BUSY), 100, 10000)) {
+ ret = -EBUSY;
+ goto err_disable_clks;
+ }

/* Set the MII address register to write */
writel(addr, priv->ioaddr + mii_address);
writel(value, priv->ioaddr + mii_data);

/* Wait until any existing MII operation is complete */
- return readl_poll_timeout(priv->ioaddr + mii_data, tmp,
- !(tmp & MII_XGMAC_BUSY), 100, 10000);
+ ret = readl_poll_timeout(priv->ioaddr + mii_data, tmp,
+ !(tmp & MII_XGMAC_BUSY), 100, 10000);
+
+err_disable_clks:
+ pm_runtime_put(priv->device);
+
+ return ret;
}

/**
@@ -196,6 +229,12 @@ static int stmmac_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg)
int data = 0;
u32 v;

+ data = pm_runtime_get_sync(priv->device);
+ if (data < 0) {
+ pm_runtime_put_noidle(priv->device);
+ return data;
+ }
+
value |= (phyaddr << priv->hw->mii.addr_shift)
& priv->hw->mii.addr_mask;
value |= (phyreg << priv->hw->mii.reg_shift) & priv->hw->mii.reg_mask;
@@ -216,19 +255,26 @@ static int stmmac_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg)
}

if (readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY),
- 100, 10000))
- return -EBUSY;
+ 100, 10000)) {
+ data = -EBUSY;
+ goto err_disable_clks;
+ }

writel(data, priv->ioaddr + mii_data);
writel(value, priv->ioaddr + mii_address);

if (readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY),
- 100, 10000))
- return -EBUSY;
+ 100, 10000)) {
+ data = -EBUSY;
+ goto err_disable_clks;
+ }

/* Read the data from the MII data register */
data = (int)readl(priv->ioaddr + mii_data) & MII_DATA_MASK;

+err_disable_clks:
+ pm_runtime_put(priv->device);
+
return data;
}

@@ -247,10 +293,16 @@ static int stmmac_mdio_write(struct mii_bus *bus, int phyaddr, int phyreg,
struct stmmac_priv *priv = netdev_priv(ndev);
unsigned int mii_address = priv->hw->mii.addr;
unsigned int mii_data = priv->hw->mii.data;
+ int ret, data = phydata;
u32 value = MII_BUSY;
- int data = phydata;
u32 v;

+ ret = pm_runtime_get_sync(priv->device);
+ if (ret < 0) {
+ pm_runtime_put_noidle(priv->device);
+ return ret;
+ }
+
value |= (phyaddr << priv->hw->mii.addr_shift)
& priv->hw->mii.addr_mask;
value |= (phyreg << priv->hw->mii.reg_shift) & priv->hw->mii.reg_mask;
@@ -275,16 +327,23 @@ static int stmmac_mdio_write(struct mii_bus *bus, int phyaddr, int phyreg,

/* Wait until any existing MII operation is complete */
if (readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY),
- 100, 10000))
- return -EBUSY;
+ 100, 10000)) {
+ ret = -EBUSY;
+ goto err_disable_clks;
+ }

/* Set the MII address register to write */
writel(data, priv->ioaddr + mii_data);
writel(value, priv->ioaddr + mii_address);

/* Wait until any existing MII operation is complete */
- return readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY),
- 100, 10000);
+ ret = readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY),
+ 100, 10000);
+
+err_disable_clks:
+ pm_runtime_put(priv->device);
+
+ return ret;
}

/**
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 48186cd32ce1..035f9aef4308 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -720,7 +720,6 @@ int stmmac_pltfr_remove(struct platform_device *pdev)
}
EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);

-#ifdef CONFIG_PM_SLEEP
/**
* stmmac_pltfr_suspend
* @dev: device pointer
@@ -728,7 +727,7 @@ EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);
* call the main suspend function and then, if required, on some platform, it
* can call an exit helper.
*/
-static int stmmac_pltfr_suspend(struct device *dev)
+static int __maybe_unused stmmac_pltfr_suspend(struct device *dev)
{
int ret;
struct net_device *ndev = dev_get_drvdata(dev);
@@ -749,7 +748,7 @@ static int stmmac_pltfr_suspend(struct device *dev)
* the main resume function, on some platforms, it can call own init helper
* if required.
*/
-static int stmmac_pltfr_resume(struct device *dev)
+static int __maybe_unused stmmac_pltfr_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct stmmac_priv *priv = netdev_priv(ndev);
@@ -760,10 +759,29 @@ static int stmmac_pltfr_resume(struct device *dev)

return stmmac_resume(dev);
}
-#endif /* CONFIG_PM_SLEEP */

-SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend,
- stmmac_pltfr_resume);
+static int __maybe_unused stmmac_runtime_suspend(struct device *dev)
+{
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct stmmac_priv *priv = netdev_priv(ndev);
+
+ stmmac_bus_clks_config(priv, false);
+
+ return 0;
+}
+
+static int __maybe_unused stmmac_runtime_resume(struct device *dev)
+{
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct stmmac_priv *priv = netdev_priv(ndev);
+
+ return stmmac_bus_clks_config(priv, true);
+}
+
+const struct dev_pm_ops stmmac_pltfr_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(stmmac_pltfr_suspend, stmmac_pltfr_resume)
+ SET_RUNTIME_PM_OPS(stmmac_runtime_suspend, stmmac_runtime_resume, NULL)
+};
EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops);

MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support");
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index a7a1c7411348..db7475dc601f 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -396,18 +396,6 @@ static void free_msi_irqs(struct pci_dev *dev)
for (i = 0; i < entry->nvec_used; i++)
BUG_ON(irq_has_action(entry->irq + i));

- pci_msi_teardown_msi_irqs(dev);
-
- list_for_each_entry_safe(entry, tmp, msi_list, list) {
- if (entry->msi_attrib.is_msix) {
- if (list_is_last(&entry->list, msi_list))
- iounmap(entry->mask_base);
- }
-
- list_del(&entry->list);
- free_msi_entry(entry);
- }
-
if (dev->msi_irq_groups) {
sysfs_remove_groups(&dev->dev.kobj, dev->msi_irq_groups);
msi_attrs = dev->msi_irq_groups[0]->attrs;
@@ -423,6 +411,18 @@ static void free_msi_irqs(struct pci_dev *dev)
kfree(dev->msi_irq_groups);
dev->msi_irq_groups = NULL;
}
+
+ pci_msi_teardown_msi_irqs(dev);
+
+ list_for_each_entry_safe(entry, tmp, msi_list, list) {
+ if (entry->msi_attrib.is_msix) {
+ if (list_is_last(&entry->list, msi_list))
+ iounmap(entry->mask_base);
+ }
+
+ list_del(&entry->list);
+ free_msi_entry(entry);
+ }
}

static void pci_intx_for_msi(struct pci_dev *dev, int enable)
@@ -592,6 +592,9 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
goto out;

pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
+ /* Lies, damned lies, and MSIs */
+ if (dev->dev_flags & PCI_DEV_FLAGS_HAS_MSI_MASKING)
+ control |= PCI_MSI_FLAGS_MASKBIT;

entry->msi_attrib.is_msix = 0;
entry->msi_attrib.is_64 = !!(control & PCI_MSI_FLAGS_64BIT);
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index fb91b2d7b1c5..bb863ddb59bf 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5756,3 +5756,9 @@ static void apex_pci_fixup_class(struct pci_dev *pdev)
}
DECLARE_PCI_FIXUP_CLASS_HEADER(0x1ac1, 0x089a,
PCI_CLASS_NOT_DEFINED, 8, apex_pci_fixup_class);
+
+static void nvidia_ion_ahci_fixup(struct pci_dev *pdev)
+{
+ pdev->dev_flags |= PCI_DEV_FLAGS_HAS_MSI_MASKING;
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, 0x0ab8, nvidia_ion_ahci_fixup);
diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index 6379f26a335f..9233f7e74454 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -89,7 +89,7 @@ static int of_thermal_get_temp(struct thermal_zone_device *tz,
{
struct __thermal_zone *data = tz->devdata;

- if (!data->ops->get_temp)
+ if (!data->ops || !data->ops->get_temp)
return -EINVAL;

return data->ops->get_temp(data->sensor_data, temp);
@@ -186,6 +186,9 @@ static int of_thermal_set_emul_temp(struct thermal_zone_device *tz,
{
struct __thermal_zone *data = tz->devdata;

+ if (!data->ops || !data->ops->set_emul_temp)
+ return -EINVAL;
+
return data->ops->set_emul_temp(data->sensor_data, temp);
}

@@ -194,7 +197,7 @@ static int of_thermal_get_trend(struct thermal_zone_device *tz, int trip,
{
struct __thermal_zone *data = tz->devdata;

- if (!data->ops->get_trend)
+ if (!data->ops || !data->ops->get_trend)
return -EINVAL;

return data->ops->get_trend(data->sensor_data, trip, trend);
@@ -301,7 +304,7 @@ static int of_thermal_set_trip_temp(struct thermal_zone_device *tz, int trip,
if (trip >= data->ntrips || trip < 0)
return -EDOM;

- if (data->ops->set_trip_temp) {
+ if (data->ops && data->ops->set_trip_temp) {
int ret;

ret = data->ops->set_trip_temp(data->sensor_data, trip, temp);
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index 86fd3bf62af6..8cb2cf612e49 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -278,11 +278,10 @@ static inline bool z_erofs_try_inplace_io(struct z_erofs_collector *clt,

/* callers must be with collection lock held */
static int z_erofs_attach_page(struct z_erofs_collector *clt,
- struct page *page,
- enum z_erofs_page_type type)
+ struct page *page, enum z_erofs_page_type type,
+ bool pvec_safereuse)
{
int ret;
- bool occupied;

/* give priority for inplaceio */
if (clt->mode >= COLLECT_PRIMARY &&
@@ -290,10 +289,9 @@ static int z_erofs_attach_page(struct z_erofs_collector *clt,
z_erofs_try_inplace_io(clt, page))
return 0;

- ret = z_erofs_pagevec_enqueue(&clt->vector,
- page, type, &occupied);
+ ret = z_erofs_pagevec_enqueue(&clt->vector, page, type,
+ pvec_safereuse);
clt->cl->vcnt += (unsigned int)ret;
-
return ret ? 0 : -EAGAIN;
}

@@ -647,7 +645,8 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
tight &= (clt->mode >= COLLECT_PRIMARY_FOLLOWED);

retry:
- err = z_erofs_attach_page(clt, page, page_type);
+ err = z_erofs_attach_page(clt, page, page_type,
+ clt->mode >= COLLECT_PRIMARY_FOLLOWED);
/* should allocate an additional staging page for pagevec */
if (err == -EAGAIN) {
struct page *const newpage =
@@ -655,7 +654,7 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,

newpage->mapping = Z_EROFS_MAPPING_STAGING;
err = z_erofs_attach_page(clt, newpage,
- Z_EROFS_PAGE_TYPE_EXCLUSIVE);
+ Z_EROFS_PAGE_TYPE_EXCLUSIVE, true);
if (!err)
goto retry;
}
diff --git a/fs/erofs/zpvec.h b/fs/erofs/zpvec.h
index 1d67cbd38704..52898176ef31 100644
--- a/fs/erofs/zpvec.h
+++ b/fs/erofs/zpvec.h
@@ -108,12 +108,17 @@ static inline void z_erofs_pagevec_ctor_init(struct z_erofs_pagevec_ctor *ctor,
static inline bool z_erofs_pagevec_enqueue(struct z_erofs_pagevec_ctor *ctor,
struct page *page,
enum z_erofs_page_type type,
- bool *occupied)
+ bool pvec_safereuse)
{
- *occupied = false;
- if (!ctor->next && type)
- if (ctor->index + 1 == ctor->nr)
+ if (!ctor->next) {
+ /* some pages cannot be reused as pvec safely without I/O */
+ if (type == Z_EROFS_PAGE_TYPE_EXCLUSIVE && !pvec_safereuse)
+ type = Z_EROFS_VLE_PAGE_TYPE_TAIL_SHARED;
+
+ if (type != Z_EROFS_PAGE_TYPE_EXCLUSIVE &&
+ ctor->index + 1 == ctor->nr)
return false;
+ }

if (ctor->index >= ctor->nr)
z_erofs_pagevec_ctor_pagedown(ctor, false);
@@ -125,7 +130,6 @@ static inline bool z_erofs_pagevec_enqueue(struct z_erofs_pagevec_ctor *ctor,
/* should remind that collector->next never equal to 1, 2 */
if (type == (uintptr_t)ctor->next) {
ctor->next = page;
- *occupied = true;
}
ctor->pages[ctor->index++] = tagptr_fold(erofs_vtptr_t, page, type);
return true;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 4ba17736b614..98fdf5a31fd6 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -59,6 +59,14 @@ struct blk_keyslot_manager;
*/
#define BLKCG_MAX_POLS 5

+static inline int blk_validate_block_size(unsigned int bsize)
+{
+ if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize))
+ return -EINVAL;
+
+ return 0;
+}
+
typedef void (rq_end_io_fn)(struct request *, blk_status_t);

/*
diff --git a/include/linux/pci.h b/include/linux/pci.h
index a55097b4d992..4519bd12643f 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -227,6 +227,8 @@ enum pci_dev_flags {
PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
/* Don't use Relaxed Ordering for TLPs directed at this device */
PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11),
+ /* Device does honor MSI masking despite saying otherwise */
+ PCI_DEV_FLAGS_HAS_MSI_MASKING = (__force pci_dev_flags_t) (1 << 12),
};

enum pci_irq_reroute_variant {
diff --git a/init/main.c b/init/main.c
index dd26a42e80a8..4fe58ed4aca7 100644
--- a/init/main.c
+++ b/init/main.c
@@ -380,6 +380,7 @@ static char * __init xbc_make_cmdline(const char *key)
ret = xbc_snprint_cmdline(new_cmdline, len + 1, root);
if (ret < 0 || ret > len) {
pr_err("Failed to print extra kernel cmdline.\n");
+ memblock_free(__pa(new_cmdline), len + 1);
return NULL;
}

diff --git a/kernel/events/core.c b/kernel/events/core.c
index c81151926171..908417736f4e 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7036,7 +7036,6 @@ void perf_output_sample(struct perf_output_handle *handle,
static u64 perf_virt_to_phys(u64 virt)
{
u64 phys_addr = 0;
- struct page *p = NULL;

if (!virt)
return 0;
@@ -7055,14 +7054,15 @@ static u64 perf_virt_to_phys(u64 virt)
* If failed, leave phys_addr as 0.
*/
if (current->mm != NULL) {
+ struct page *p;
+
pagefault_disable();
- if (get_user_page_fast_only(virt, 0, &p))
+ if (get_user_page_fast_only(virt, 0, &p)) {
phys_addr = page_to_phys(p) + virt % PAGE_SIZE;
+ put_page(p);
+ }
pagefault_enable();
}
-
- if (p)
- put_page(p);
}

return phys_addr;
diff --git a/scripts/lld-version.sh b/scripts/lld-version.sh
index d70edb4d8a4f..f1eeee450a23 100755
--- a/scripts/lld-version.sh
+++ b/scripts/lld-version.sh
@@ -6,15 +6,32 @@
# Print the linker version of `ld.lld' in a 5 or 6-digit form
# such as `100001' for ld.lld 10.0.1 etc.

-linker_string="$($* --version)"
+set -e

-if ! ( echo $linker_string | grep -q LLD ); then
+# Convert the version string x.y.z to a canonical 5 or 6-digit form.
+get_canonical_version()
+{
+ IFS=.
+ set -- $1
+
+ # If the 2nd or 3rd field is missing, fill it with a zero.
+ echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0}))
+}
+
+# Get the first line of the --version output.
+IFS='
+'
+set -- $(LC_ALL=C "$@" --version)
+
+# Split the line on spaces.
+IFS=' '
+set -- $1
+
+while [ $# -gt 1 -a "$1" != "LLD" ]; do
+ shift
+done
+if [ "$1" = LLD ]; then
+ echo $(get_canonical_version ${2%-*})
+else
echo 0
- exit 1
fi
-
-VERSION=$(echo $linker_string | cut -d ' ' -f 2)
-MAJOR=$(echo $VERSION | cut -d . -f 1)
-MINOR=$(echo $VERSION | cut -d . -f 2)
-PATCHLEVEL=$(echo $VERSION | cut -d . -f 3)
-printf "%d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL
diff --git a/security/Kconfig b/security/Kconfig
index 7561f6f99f1d..0548db16c49d 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -191,6 +191,9 @@ config HARDENED_USERCOPY_PAGESPAN
config FORTIFY_SOURCE
bool "Harden common str/mem functions against buffer overflows"
depends on ARCH_HAS_FORTIFY_SOURCE
+ # https://bugs.llvm.org/show_bug.cgi?id=50322
+ # https://bugs.llvm.org/show_bug.cgi?id=41459
+ depends on !CC_IS_CLANG
help
Detect overflows of buffers in common string and memory functions
where the compiler can determine and validate the buffer sizes.
diff --git a/tools/testing/selftests/x86/iopl.c b/tools/testing/selftests/x86/iopl.c
index bab2f6e06b63..7e3e09c1abac 100644
--- a/tools/testing/selftests/x86/iopl.c
+++ b/tools/testing/selftests/x86/iopl.c
@@ -85,48 +85,88 @@ static void expect_gp_outb(unsigned short port)
printf("[OK]\toutb to 0x%02hx failed\n", port);
}

-static bool try_cli(void)
+#define RET_FAULTED 0
+#define RET_FAIL 1
+#define RET_EMUL 2
+
+static int try_cli(void)
{
+ unsigned long flags;
+
sethandler(SIGSEGV, sigsegv, SA_RESETHAND);
if (sigsetjmp(jmpbuf, 1) != 0) {
- return false;
+ return RET_FAULTED;
} else {
- asm volatile ("cli");
- return true;
+ asm volatile("cli; pushf; pop %[flags]"
+ : [flags] "=rm" (flags));
+
+ /* X86_FLAGS_IF */
+ if (!(flags & (1 << 9)))
+ return RET_FAIL;
+ else
+ return RET_EMUL;
}
clearhandler(SIGSEGV);
}

-static bool try_sti(void)
+static int try_sti(bool irqs_off)
{
+ unsigned long flags;
+
sethandler(SIGSEGV, sigsegv, SA_RESETHAND);
if (sigsetjmp(jmpbuf, 1) != 0) {
- return false;
+ return RET_FAULTED;
} else {
- asm volatile ("sti");
- return true;
+ asm volatile("sti; pushf; pop %[flags]"
+ : [flags] "=rm" (flags));
+
+ /* X86_FLAGS_IF */
+ if (irqs_off && (flags & (1 << 9)))
+ return RET_FAIL;
+ else
+ return RET_EMUL;
}
clearhandler(SIGSEGV);
}

-static void expect_gp_sti(void)
+static void expect_gp_sti(bool irqs_off)
{
- if (try_sti()) {
+ int ret = try_sti(irqs_off);
+
+ switch (ret) {
+ case RET_FAULTED:
+ printf("[OK]\tSTI faulted\n");
+ break;
+ case RET_EMUL:
+ printf("[OK]\tSTI NOPped\n");
+ break;
+ default:
printf("[FAIL]\tSTI worked\n");
nerrs++;
- } else {
- printf("[OK]\tSTI faulted\n");
}
}

-static void expect_gp_cli(void)
+/*
+ * Returns whether it managed to disable interrupts.
+ */
+static bool test_cli(void)
{
- if (try_cli()) {
+ int ret = try_cli();
+
+ switch (ret) {
+ case RET_FAULTED:
+ printf("[OK]\tCLI faulted\n");
+ break;
+ case RET_EMUL:
+ printf("[OK]\tCLI NOPped\n");
+ break;
+ default:
printf("[FAIL]\tCLI worked\n");
nerrs++;
- } else {
- printf("[OK]\tCLI faulted\n");
+ return true;
}
+
+ return false;
}

int main(void)
@@ -152,8 +192,7 @@ int main(void)
}

/* Make sure that CLI/STI are blocked even with IOPL level 3 */
- expect_gp_cli();
- expect_gp_sti();
+ expect_gp_sti(test_cli());
expect_ok_outb(0x80);

/* Establish an I/O bitmap to test the restore */
@@ -204,8 +243,7 @@ int main(void)
printf("[RUN]\tparent: write to 0x80 (should fail)\n");

expect_gp_outb(0x80);
- expect_gp_cli();
- expect_gp_sti();
+ expect_gp_sti(test_cli());

/* Test the capability checks. */
printf("\tiopl(3)\n");