From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Alan Stern <stern@rowland.harvard.edu>
Subject: [PATCH 3.18 01/59] USB: ene_usb6250: fix DMA to the stack
Date: Tue, 23 May 2017 22:09:29 +0200 [thread overview]
Message-ID: <20170523200849.323440651@linuxfoundation.org> (raw)
In-Reply-To: <20170523200849.241966497@linuxfoundation.org>
3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alan Stern <stern@rowland.harvard.edu>
commit 628c2893d44876ddd11602400c70606ade62e129 upstream.
The ene_usb6250 sub-driver in usb-storage does USB I/O to buffers on
the stack, which doesn't work with vmapped stacks. This patch fixes
the problem by allocating a separate 512-byte buffer at probe time and
using it for all of the offending I/O operations.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: Andreas Hartmann <andihartmann@01019freenet.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/storage/ene_ub6250.c | 90 +++++++++++++++++++++++----------------
1 file changed, 55 insertions(+), 35 deletions(-)
--- a/drivers/usb/storage/ene_ub6250.c
+++ b/drivers/usb/storage/ene_ub6250.c
@@ -443,6 +443,10 @@ struct ms_lib_ctrl {
#define SD_BLOCK_LEN 9
struct ene_ub6250_info {
+
+ /* I/O bounce buffer */
+ u8 *bbuf;
+
/* for 6250 code */
struct SD_STATUS SD_Status;
struct MS_STATUS MS_Status;
@@ -490,8 +494,11 @@ static int ene_load_bincode(struct us_da
static void ene_ub6250_info_destructor(void *extra)
{
+ struct ene_ub6250_info *info = (struct ene_ub6250_info *) extra;
+
if (!extra)
return;
+ kfree(info->bbuf);
}
static int ene_send_scsi_cmd(struct us_data *us, u8 fDir, void *buf, int use_sg)
@@ -855,8 +862,9 @@ static int ms_read_readpage(struct us_da
u8 PageNum, u32 *PageBuf, struct ms_lib_type_extdat *ExtraDat)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
+ struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
+ u8 *bbuf = info->bbuf;
int result;
- u8 ExtBuf[4];
u32 bn = PhyBlockAddr * 0x20 + PageNum;
/* printk(KERN_INFO "MS --- MS_ReaderReadPage,
@@ -899,7 +907,7 @@ static int ms_read_readpage(struct us_da
bcb->CDB[2] = (unsigned char)(PhyBlockAddr>>16);
bcb->CDB[6] = 0x01;
- result = ene_send_scsi_cmd(us, FDIR_READ, &ExtBuf, 0);
+ result = ene_send_scsi_cmd(us, FDIR_READ, bbuf, 0);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
@@ -908,9 +916,9 @@ static int ms_read_readpage(struct us_da
ExtraDat->status0 = 0x10; /* Not yet,fireware support */
ExtraDat->status1 = 0x00; /* Not yet,fireware support */
- ExtraDat->ovrflg = ExtBuf[0];
- ExtraDat->mngflg = ExtBuf[1];
- ExtraDat->logadr = memstick_logaddr(ExtBuf[2], ExtBuf[3]);
+ ExtraDat->ovrflg = bbuf[0];
+ ExtraDat->mngflg = bbuf[1];
+ ExtraDat->logadr = memstick_logaddr(bbuf[2], bbuf[3]);
return USB_STOR_TRANSPORT_GOOD;
}
@@ -1336,8 +1344,9 @@ static int ms_lib_read_extra(struct us_d
u8 PageNum, struct ms_lib_type_extdat *ExtraDat)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
+ struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
+ u8 *bbuf = info->bbuf;
int result;
- u8 ExtBuf[4];
/* printk("MS_LibReadExtra --- PhyBlock = %x, PageNum = %x\n", PhyBlock, PageNum); */
memset(bcb, 0, sizeof(struct bulk_cb_wrap));
@@ -1352,7 +1361,7 @@ static int ms_lib_read_extra(struct us_d
bcb->CDB[2] = (unsigned char)(PhyBlock>>16);
bcb->CDB[6] = 0x01;
- result = ene_send_scsi_cmd(us, FDIR_READ, &ExtBuf, 0);
+ result = ene_send_scsi_cmd(us, FDIR_READ, bbuf, 0);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
@@ -1360,9 +1369,9 @@ static int ms_lib_read_extra(struct us_d
ExtraDat->intr = 0x80; /* Not yet, waiting for fireware support */
ExtraDat->status0 = 0x10; /* Not yet, waiting for fireware support */
ExtraDat->status1 = 0x00; /* Not yet, waiting for fireware support */
- ExtraDat->ovrflg = ExtBuf[0];
- ExtraDat->mngflg = ExtBuf[1];
- ExtraDat->logadr = memstick_logaddr(ExtBuf[2], ExtBuf[3]);
+ ExtraDat->ovrflg = bbuf[0];
+ ExtraDat->mngflg = bbuf[1];
+ ExtraDat->logadr = memstick_logaddr(bbuf[2], bbuf[3]);
return USB_STOR_TRANSPORT_GOOD;
}
@@ -1566,9 +1575,9 @@ static int ms_lib_scan_logicalblocknumbe
u16 PhyBlock, newblk, i;
u16 LogStart, LogEnde;
struct ms_lib_type_extdat extdat;
- u8 buf[0x200];
u32 count = 0, index = 0;
struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
+ u8 *bbuf = info->bbuf;
for (PhyBlock = 0; PhyBlock < info->MS_Lib.NumberOfPhyBlock;) {
ms_lib_phy_to_log_range(PhyBlock, &LogStart, &LogEnde);
@@ -1582,14 +1591,16 @@ static int ms_lib_scan_logicalblocknumbe
}
if (count == PhyBlock) {
- ms_lib_read_extrablock(us, PhyBlock, 0, 0x80, &buf);
+ ms_lib_read_extrablock(us, PhyBlock, 0, 0x80,
+ bbuf);
count += 0x80;
}
index = (PhyBlock % 0x80) * 4;
- extdat.ovrflg = buf[index];
- extdat.mngflg = buf[index+1];
- extdat.logadr = memstick_logaddr(buf[index+2], buf[index+3]);
+ extdat.ovrflg = bbuf[index];
+ extdat.mngflg = bbuf[index+1];
+ extdat.logadr = memstick_logaddr(bbuf[index+2],
+ bbuf[index+3]);
if ((extdat.ovrflg & MS_REG_OVR_BKST) != MS_REG_OVR_BKST_OK) {
ms_lib_setacquired_errorblock(us, PhyBlock);
@@ -2072,9 +2083,9 @@ static int ene_ms_init(struct us_data *u
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
int result;
- u8 buf[0x200];
u16 MSP_BlockSize, MSP_UserAreaBlocks;
struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
+ u8 *bbuf = info->bbuf;
printk(KERN_INFO "transport --- ENE_MSInit\n");
@@ -2093,13 +2104,13 @@ static int ene_ms_init(struct us_data *u
bcb->CDB[0] = 0xF1;
bcb->CDB[1] = 0x01;
- result = ene_send_scsi_cmd(us, FDIR_READ, &buf, 0);
+ result = ene_send_scsi_cmd(us, FDIR_READ, bbuf, 0);
if (result != USB_STOR_XFER_GOOD) {
printk(KERN_ERR "Execution MS Init Code Fail !!\n");
return USB_STOR_TRANSPORT_ERROR;
}
/* the same part to test ENE */
- info->MS_Status = *(struct MS_STATUS *)&buf[0];
+ info->MS_Status = *(struct MS_STATUS *) bbuf;
if (info->MS_Status.Insert && info->MS_Status.Ready) {
printk(KERN_INFO "Insert = %x\n", info->MS_Status.Insert);
@@ -2108,15 +2119,15 @@ static int ene_ms_init(struct us_data *u
printk(KERN_INFO "IsMSPHG = %x\n", info->MS_Status.IsMSPHG);
printk(KERN_INFO "WtP= %x\n", info->MS_Status.WtP);
if (info->MS_Status.IsMSPro) {
- MSP_BlockSize = (buf[6] << 8) | buf[7];
- MSP_UserAreaBlocks = (buf[10] << 8) | buf[11];
+ MSP_BlockSize = (bbuf[6] << 8) | bbuf[7];
+ MSP_UserAreaBlocks = (bbuf[10] << 8) | bbuf[11];
info->MSP_TotalBlock = MSP_BlockSize * MSP_UserAreaBlocks;
} else {
ms_card_init(us); /* Card is MS (to ms.c)*/
}
usb_stor_dbg(us, "MS Init Code OK !!\n");
} else {
- usb_stor_dbg(us, "MS Card Not Ready --- %x\n", buf[0]);
+ usb_stor_dbg(us, "MS Card Not Ready --- %x\n", bbuf[0]);
return USB_STOR_TRANSPORT_ERROR;
}
@@ -2126,9 +2137,9 @@ static int ene_ms_init(struct us_data *u
static int ene_sd_init(struct us_data *us)
{
int result;
- u8 buf[0x200];
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
+ u8 *bbuf = info->bbuf;
usb_stor_dbg(us, "transport --- ENE_SDInit\n");
/* SD Init Part-1 */
@@ -2162,17 +2173,17 @@ static int ene_sd_init(struct us_data *u
bcb->Flags = US_BULK_FLAG_IN;
bcb->CDB[0] = 0xF1;
- result = ene_send_scsi_cmd(us, FDIR_READ, &buf, 0);
+ result = ene_send_scsi_cmd(us, FDIR_READ, bbuf, 0);
if (result != USB_STOR_XFER_GOOD) {
usb_stor_dbg(us, "Execution SD Init Code Fail !!\n");
return USB_STOR_TRANSPORT_ERROR;
}
- info->SD_Status = *(struct SD_STATUS *)&buf[0];
+ info->SD_Status = *(struct SD_STATUS *) bbuf;
if (info->SD_Status.Insert && info->SD_Status.Ready) {
struct SD_STATUS *s = &info->SD_Status;
- ene_get_card_status(us, (unsigned char *)&buf);
+ ene_get_card_status(us, bbuf);
usb_stor_dbg(us, "Insert = %x\n", s->Insert);
usb_stor_dbg(us, "Ready = %x\n", s->Ready);
usb_stor_dbg(us, "IsMMC = %x\n", s->IsMMC);
@@ -2180,7 +2191,7 @@ static int ene_sd_init(struct us_data *u
usb_stor_dbg(us, "HiSpeed = %x\n", s->HiSpeed);
usb_stor_dbg(us, "WtP = %x\n", s->WtP);
} else {
- usb_stor_dbg(us, "SD Card Not Ready --- %x\n", buf[0]);
+ usb_stor_dbg(us, "SD Card Not Ready --- %x\n", bbuf[0]);
return USB_STOR_TRANSPORT_ERROR;
}
return USB_STOR_TRANSPORT_GOOD;
@@ -2190,13 +2201,15 @@ static int ene_sd_init(struct us_data *u
static int ene_init(struct us_data *us)
{
int result;
- u8 misc_reg03 = 0;
+ u8 misc_reg03;
struct ene_ub6250_info *info = (struct ene_ub6250_info *)(us->extra);
+ u8 *bbuf = info->bbuf;
- result = ene_get_card_type(us, REG_CARD_STATUS, &misc_reg03);
+ result = ene_get_card_type(us, REG_CARD_STATUS, bbuf);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
+ misc_reg03 = bbuf[0];
if (misc_reg03 & 0x01) {
if (!info->SD_Status.Ready) {
result = ene_sd_init(us);
@@ -2312,8 +2325,9 @@ static int ene_ub6250_probe(struct usb_i
const struct usb_device_id *id)
{
int result;
- u8 misc_reg03 = 0;
+ u8 misc_reg03;
struct us_data *us;
+ struct ene_ub6250_info *info;
result = usb_stor_probe1(&us, intf, id,
(id - ene_ub6250_usb_ids) + ene_ub6250_unusual_dev_list);
@@ -2321,11 +2335,16 @@ static int ene_ub6250_probe(struct usb_i
return result;
/* FIXME: where should the code alloc extra buf ? */
- if (!us->extra) {
- us->extra = kzalloc(sizeof(struct ene_ub6250_info), GFP_KERNEL);
- if (!us->extra)
- return -ENOMEM;
- us->extra_destructor = ene_ub6250_info_destructor;
+ us->extra = kzalloc(sizeof(struct ene_ub6250_info), GFP_KERNEL);
+ if (!us->extra)
+ return -ENOMEM;
+ us->extra_destructor = ene_ub6250_info_destructor;
+
+ info = (struct ene_ub6250_info *)(us->extra);
+ info->bbuf = kmalloc(512, GFP_KERNEL);
+ if (!info->bbuf) {
+ kfree(us->extra);
+ return -ENOMEM;
}
us->transport_name = "ene_ub6250";
@@ -2337,12 +2356,13 @@ static int ene_ub6250_probe(struct usb_i
return result;
/* probe card type */
- result = ene_get_card_type(us, REG_CARD_STATUS, &misc_reg03);
+ result = ene_get_card_type(us, REG_CARD_STATUS, info->bbuf);
if (result != USB_STOR_XFER_GOOD) {
usb_stor_disconnect(intf);
return USB_STOR_TRANSPORT_ERROR;
}
+ misc_reg03 = info->bbuf[0];
if (!(misc_reg03 & 0x01)) {
pr_info("ums_eneub6250: This driver only supports SD/MS cards. "
"It does not support SM cards.\n");
next prev parent reply other threads:[~2017-05-23 21:00 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-23 20:09 [PATCH 3.18 00/59] 3.18.55-stable review Greg Kroah-Hartman
2017-05-23 20:09 ` Greg Kroah-Hartman [this message]
2017-05-23 20:09 ` [PATCH 3.18 02/59] watchdog: pcwd_usb: fix NULL-deref at probe Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 03/59] char: lp: fix possible integer overflow in lp_setup() Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 04/59] USB: core: replace %p with %pK Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 05/59] dm btree: fix for dm_btree_find_lowest_key() Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 06/59] dm bufio: avoid a possible ABBA deadlock Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 07/59] dm thin metadata: call precommit before saving the roots Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 08/59] dm space map disk: fix some book keeping in the disk space map Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 09/59] mwifiex: pcie: fix cmd_buf use-after-free in remove/reset Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 11/59] regulator: tps65023: Fix inverted core enable logic Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 12/59] ath9k_htc: fix NULL-deref at probe Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 13/59] cdc-acm: fix possible invalid access when processing notification Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 14/59] of: fix sparse warning in of_pci_range_parser_one Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 15/59] of: fdt: add missing allocation-failure check Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 16/59] iio: dac: ad7303: fix channel description Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 17/59] pid_ns: Sleep in TASK_INTERRUPTIBLE in zap_pid_ns_processes Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 18/59] USB: serial: ftdi_sio: fix setting latency for unprivileged users Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 19/59] USB: serial: ftdi_sio: add Olimex ARM-USB-TINY(H) PIDs Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 20/59] usb: host: xhci-plat: propagate return value of platform_get_irq() Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 21/59] usb: host: xhci-mem: allocate zeroed Scratchpad Buffer Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 22/59] net: irda: irda-usb: fix firmware name on big-endian hosts Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 23/59] [media] usbvision: fix NULL-deref at probe Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 24/59] [media] mceusb: " Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 25/59] [media] ttusb2: limit messages to buffer size Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 26/59] usb: musb: tusb6010_omap: Do not reset the other directions packet size Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 27/59] USB: iowarrior: fix info ioctl on big-endian hosts Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 28/59] usb: serial: option: add Telit ME910 support Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 30/59] USB: serial: mct_u232: fix big-endian baud-rate handling Greg Kroah-Hartman
2017-05-23 20:09 ` [PATCH 3.18 31/59] USB: serial: io_ti: fix div-by-zero in set_termios Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 32/59] USB: hub: fix SS hub-descriptor handling Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 33/59] USB: hub: fix non-SS " Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 34/59] tty: Prevent ldisc drivers from re-using stale tty fields Greg Kroah-Hartman
2017-05-24 13:44 ` Alan Cox
2017-05-24 15:03 ` Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 36/59] iio: proximity: as3935: fix as3935_write Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 37/59] [media] gspca: konica: add missing endpoint sanity check Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 38/59] [media] s5p-mfc: Fix unbalanced call to clock management Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 39/59] [media] dib0700: fix NULL-deref at probe Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 40/59] [media] zr364xx: enforce minimum size when reading header Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 41/59] [media] cx231xx-cards: fix NULL-deref at probe Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 42/59] [media] cx231xx-audio: " Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 43/59] powerpc/pseries: Fix of_node_put() underflow during DLPAR remove Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 44/59] ARM: dts: at91: sama5d3_xplained: fix ADC vref Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 45/59] ARM: dts: at91: sama5d3_xplained: not all ADC channels are available Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 46/59] arm64: uaccess: ensure extension of access_ok() addr Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 47/59] arm64: documentation: document tagged pointer stack constraints Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 48/59] xc2028: Fix use-after-free bug properly Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 49/59] mm/huge_memory.c: respect FOLL_FORCE/FOLL_COW for thp Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 50/59] metag/uaccess: Fix access_ok() Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 51/59] metag/uaccess: Check access_ok in strncpy_from_user Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 52/59] stackprotector: Increase the per-task stack canarys random range from 32 bits to 64 bits on 64-bit platforms Greg Kroah-Hartman
2017-05-23 20:10 ` [kernel-hardening] " Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 53/59] uwb: fix device quirk on big-endian hosts Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 54/59] osf_wait4(): fix infoleak Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 55/59] tracing/kprobes: Enforce kprobes teardown after testing Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 56/59] PCI: Fix pci_mmap_fits() for HAVE_PCI_RESOURCE_TO_USER platforms Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 58/59] drivers: char: mem: Check for address space wraparound with mmap() Greg Kroah-Hartman
2017-05-23 20:10 ` [PATCH 3.18 59/59] usb: misc: legousbtower: Fix memory leak Greg Kroah-Hartman
2017-05-24 15:45 ` [PATCH 3.18 00/59] 3.18.55-stable review Guenter Roeck
-- strict thread matches above, loose matches on Subject: below --
2017-05-15 18:23 Use case for TASKS_RCU Paul E. McKenney
2017-05-15 18:48 ` Steven Rostedt
2017-05-15 20:12 ` Paul E. McKenney
2017-05-16 6:22 ` Ingo Molnar
2017-05-16 12:23 ` Paul E. McKenney
2017-05-16 13:07 ` Steven Rostedt
2017-05-24 9:37 ` Masami Hiramatsu
2017-05-19 6:23 ` Ingo Molnar
2017-05-19 13:35 ` Paul E. McKenney
2017-05-19 14:04 ` Steven Rostedt
2017-05-19 14:23 ` Steven Rostedt
2017-05-19 19:06 ` Paul E. McKenney
2017-05-23 0:00 ` Paul E. McKenney
2017-05-23 5:19 ` Steven Rostedt
2017-05-23 15:33 ` Paul E. McKenney
2017-05-23 19:39 ` Steven Rostedt
2017-05-23 20:00 ` Paul E. McKenney
2017-05-23 20:38 ` Steven Rostedt
2017-05-23 21:10 ` Paul E. McKenney
2017-05-23 23:47 ` Steven Rostedt
2017-05-24 1:12 ` Paul E. McKenney
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