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  1. 12 Dec, 2013 22 commits
  3. 08 Dec, 2013 18 commits
    • Greg Kroah-Hartman's avatar
      Linux 3.4.73 · 50b673d2
      Greg Kroah-Hartman authored
      50b673d2
    • Mikulas Patocka's avatar
      blk-core: Fix memory corruption if blkcg_init_queue fails · 78530a1a
      Mikulas Patocka authored 
      commit fff4996b upstream.

If blkcg_init_queue fails, blk_alloc_queue_node doesn't call bdi_destroy
to clean up structures allocated by the backing dev.

------------[ cut here ]------------
WARNING: at lib/debugobjects.c:260 debug_print_object+0x85/0xa0()
ODEBUG: free active (active state 0) object type: percpu_counter hint:           (null)
Modules linked in: dm_loop dm_mod ip6table_filter ip6_tables uvesafb cfbcopyarea cfbimgblt cfbfillrect fbcon font bitblit fbcon_rotate fbcon_cw fbcon_ud fbcon_ccw softcursor fb fbdev ipt_MASQUERADE iptable_nat nf_nat_ipv4 msr nf_conntrack_ipv4 nf_defrag_ipv4 xt_state ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc tun ipv6 cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_ondemand cpufreq_conservative spadfs fuse hid_generic usbhid hid raid0 md_mod dmi_sysfs nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack lm85 hwmon_vid snd_usb_audio snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd_hwdep snd_usbmidi_lib snd_rawmidi snd soundcore acpi_cpufreq freq_table mperf sata_svw serverworks kvm_amd ide_core ehci_pci ohci_hcd libata ehci_hcd kvm usbcore tg3 usb_common libphy k10temp pcspkr ptp i2c_piix4 i2c_core evdev microcode hwmon rtc_cmos pps_core e100 skge floppy mii processor button unix
CPU: 0 PID: 2739 Comm: lvchange Tainted: G        W
3.10.15-devel #14
Hardware name: empty empty/S3992-E, BIOS 'V1.06   ' 06/09/2009
 0000000000000009 ffff88023c3c1ae8 ffffffff813c8fd4 ffff88023c3c1b20
 ffffffff810399eb ffff88043d35cd58 ffffffff81651940 ffff88023c3c1bf8
 ffffffff82479d90 0000000000000005 ffff88023c3c1b80 ffffffff81039a67
Call Trace:
 [<ffffffff813c8fd4>] dump_stack+0x19/0x1b
 [<ffffffff810399eb>] warn_slowpath_common+0x6b/0xa0
 [<ffffffff81039a67>] warn_slowpath_fmt+0x47/0x50
 [<ffffffff8122aaaf>] ? debug_check_no_obj_freed+0xcf/0x250
 [<ffffffff81229a15>] debug_print_object+0x85/0xa0
 [<ffffffff8122abe3>] debug_check_no_obj_freed+0x203/0x250
 [<ffffffff8113c4ac>] kmem_cache_free+0x20c/0x3a0
 [<ffffffff811f6709>] blk_alloc_queue_node+0x2a9/0x2c0
 [<ffffffff811f672e>] blk_alloc_queue+0xe/0x10
 [<ffffffffa04c0093>] dm_create+0x1a3/0x530 [dm_mod]
 [<ffffffffa04c6bb0>] ? list_version_get_info+0xe0/0xe0 [dm_mod]
 [<ffffffffa04c6c07>] dev_create+0x57/0x2b0 [dm_mod]
 [<ffffffffa04c6bb0>] ? list_version_get_info+0xe0/0xe0 [dm_mod]
 [<ffffffffa04c6bb0>] ? list_version_get_info+0xe0/0xe0 [dm_mod]
 [<ffffffffa04c6528>] ctl_ioctl+0x268/0x500 [dm_mod]
 [<ffffffff81097662>] ? get_lock_stats+0x22/0x70
 [<ffffffffa04c67ce>] dm_ctl_ioctl+0xe/0x20 [dm_mod]
 [<ffffffff81161aad>] do_vfs_ioctl+0x2ed/0x520
 [<ffffffff8116cfc7>] ? fget_light+0x377/0x4e0
 [<ffffffff81161d2b>] SyS_ioctl+0x4b/0x90
 [<ffffffff813cff16>] system_call_fastpath+0x1a/0x1f
---[ end trace 4b5ff0d55673d986 ]---
------------[ cut here ]------------

This fix should be backported to stable kernels starting with 2.6.37. Note
that in the kernels prior to 3.5 the affected code is different, but the
bug is still there - bdi_init is called and bdi_destroy isn't.
Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Acked-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      78530a1a
    • Mikulas Patocka's avatar
      dm: fix truncated status strings · d8b8a43e
      Mikulas Patocka authored 
      commit fd7c092e upstream.

Avoid returning a truncated table or status string instead of setting
the DM_BUFFER_FULL_FLAG when the last target of a table fills the
buffer.

When processing a table or status request, the function retrieve_status
calls ti->type->status. If ti->type->status returns non-zero,
retrieve_status assumes that the buffer overflowed and sets
DM_BUFFER_FULL_FLAG.

However, targets don't return non-zero values from their status method
on overflow. Most targets returns always zero.

If a buffer overflow happens in a target that is not the last in the
table, it gets noticed during the next iteration of the loop in
retrieve_status; but if a buffer overflow happens in the last target, it
goes unnoticed and erroneously truncated data is returned.

In the current code, the targets behave in the following way:
* dm-crypt returns -ENOMEM if there is not enough space to store the
  key, but it returns 0 on all other overflows.
* dm-thin returns errors from the status method if a disk error happened.
  This is incorrect because retrieve_status doesn't check the error
  code, it assumes that all non-zero values mean buffer overflow.
* all the other targets always return 0.

This patch changes the ti->type->status function to return void (because
most targets don't use the return code). Overflow is detected in
retrieve_status: if the status method fills up the remaining space
completely, it is assumed that buffer overflow happened.
Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      d8b8a43e
    • Tomoki Sekiyama's avatar
      elevator: acquire q->sysfs_lock in elevator_change() · 9e23d8bd
      Tomoki Sekiyama authored 
      commit 7c8a3679 upstream.

Add locking of q->sysfs_lock into elevator_change() (an exported function)
to ensure it is held to protect q->elevator from elevator_init(), even if
elevator_change() is called from non-sysfs paths.
sysfs path (elv_iosched_store) uses __elevator_change(), non-locking
version, as the lock is already taken by elv_iosched_store().
Signed-off-by: default avatarTomoki Sekiyama <tomoki.sekiyama@hds.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Cc: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      9e23d8bd
    • Julian Stecklina's avatar
      iommu/vt-d: Fixed interaction of VFIO_IOMMU_MAP_DMA with IOMMU address limits · 3dc062d2
      Julian Stecklina authored 
      commit f9423606 upstream.

The BUG_ON in drivers/iommu/intel-iommu.c:785 can be triggered from userspace via
VFIO by calling the VFIO_IOMMU_MAP_DMA ioctl on a vfio device with any address
beyond the addressing capabilities of the IOMMU. The problem is that the ioctl code
calls iommu_iova_to_phys before it calls iommu_map. iommu_map handles the case that
it gets addresses beyond the addressing capabilities of its IOMMU.
intel_iommu_iova_to_phys does not.

This patch fixes iommu_iova_to_phys to return NULL for addresses beyond what the
IOMMU can handle. This in turn causes the ioctl call to fail in iommu_map and
(correctly) return EFAULT to the user with a helpful warning message in the kernel
log.
Signed-off-by: default avatarJulian Stecklina <jsteckli@os.inf.tu-dresden.de>
Acked-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarJoerg Roedel <joro@8bytes.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      3dc062d2
    • Sasha Levin's avatar
      video: kyro: fix incorrect sizes when copying to userspace · 6fa8c5d6
      Sasha Levin authored 
      commit 2ab68ec9 upstream.

kyro would copy u32s and specify sizeof(unsigned long) as the size to copy.

This would copy more data than intended and cause memory corruption and might
leak kernel memory.
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      6fa8c5d6
    • Stanislav Kinsbursky's avatar
      nfsd: use "init_net" for portmapper · b79811fc
      Stanislav Kinsbursky authored 
      commit f7fb86c6 upstream.

There could be a situation, when NFSd was started in one network namespace, but
stopped in another one.
This will trigger kernel panic, because RPCBIND client is stored on per-net
NFSd data, and will be NULL on NFSd shutdown.
Signed-off-by: default avatarStanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
Signed-off-by: default avatarWeng Meiling <wengmeiling.weng@huawei.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      b79811fc
    • KOBAYASHI Yoshitake's avatar
      mmc: block: fix a bug of error handling in MMC driver · 98048d9b
      KOBAYASHI Yoshitake authored 
      commit c8760069 upstream.

Current MMC driver doesn't handle generic error (bit19 of device
status) in write sequence. As a result, write data gets lost when
generic error occurs. For example, a generic error when updating a
filesystem management information causes a loss of write data and
corrupts the filesystem. In the worst case, the system will never
boot.

This patch includes the following functionality:
  1. To enable error checking for the response of CMD12 and CMD13
     in write command sequence
  2. To retry write sequence when a generic error occurs

Messages are added for v2 to show what occurs.
Signed-off-by: default avatarKOBAYASHI Yoshitake <yoshitake.kobayashi@toshiba.co.jp>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      98048d9b
    • Kees Cook's avatar
      HID: picolcd_core: validate output report details · 12c1f610
      Kees Cook authored 
      commit 1e87a245 upstream.

A HID device could send a malicious output report that would cause the
picolcd HID driver to trigger a NULL dereference during attr file writing.

[jkosina@suse.cz: changed

	report->maxfield < 1

to

	report->maxfield != 1

as suggested by Bruno].

CVE-2013-2899
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Cc: stable@kernel.org
Reviewed-by: default avatarBruno Prémont <bonbons@linux-vserver.org>
Acked-by: default avatarBruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
[Kefeng: backported to stable 3.4: adjust filename]
Signed-off-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      12c1f610
    • fan.du's avatar
      {pktgen, xfrm} Update IPv4 header total len and checksum after tranformation · d92c9bfe
      fan.du authored 
      [ Upstream commit 3868204d ]

commit a553e4a6 ("[PKTGEN]: IPSEC support")
tried to support IPsec ESP transport transformation for pktgen, but acctually
this doesn't work at all for two reasons(The orignal transformed packet has
bad IPv4 checksum value, as well as wrong auth value, reported by wireshark)

- After transpormation, IPv4 header total length needs update,
  because encrypted payload's length is NOT same as that of plain text.

- After transformation, IPv4 checksum needs re-caculate because of payload
  has been changed.

With this patch, armmed pktgen with below cofiguration, Wireshark is able to
decrypted ESP packet generated by pktgen without any IPv4 checksum error or
auth value error.

pgset "flag IPSEC"
pgset "flows 1"
Signed-off-by: default avatarFan Du <fan.du@windriver.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      d92c9bfe
    • Hannes Frederic Sowa's avatar
      ipv6: fix possible seqlock deadlock in ip6_finish_output2 · 8799b15a
      Hannes Frederic Sowa authored 
      [ Upstream commit 7f88c6b2 ]

IPv6 stats are 64 bits and thus are protected with a seqlock. By not
disabling bottom-half we could deadlock here if we don't disable bh and
a softirq reentrantly updates the same mib.

Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      8799b15a
    • Eric Dumazet's avatar
      inet: fix possible seqlock deadlocks · 5fdc381c
      Eric Dumazet authored 
      [ Upstream commit f1d8cba6 ]

In commit c9e90429 ("ipv4: fix possible seqlock deadlock") I left
another places where IP_INC_STATS_BH() were improperly used.

udp_sendmsg(), ping_v4_sendmsg() and tcp_v4_connect() are called from
process context, not from softirq context.

This was detected by lockdep seqlock support.
Reported-by: default avatarjongman heo <jongman.heo@samsung.com>
Fixes: 584bdf8c ("[IPV4]: Fix "ipOutNoRoutes" counter error for TCP and UDP")
Fixes: c319b4d7 ("net: ipv4: add IPPROTO_ICMP socket kind")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      5fdc381c
    • Shawn Landden's avatar
      net: update consumers of MSG_MORE to recognize MSG_SENDPAGE_NOTLAST · d2671a6e
      Shawn Landden authored 
      [ Upstream commit d3f7d56a ]

Commit 35f9c09f (tcp: tcp_sendpages() should call tcp_push() once)
added an internal flag MSG_SENDPAGE_NOTLAST, similar to
MSG_MORE.

algif_hash, algif_skcipher, and udp used MSG_MORE from tcp_sendpages()
and need to see the new flag as identical to MSG_MORE.

This fixes sendfile() on AF_ALG.

v3: also fix udp
Reported-and-tested-by: default avatarShawn Landden <shawnlandden@gmail.com>
Cc: Tom Herbert <therbert@google.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Original-patch: Richard Weinberger <richard@nod.at>
Signed-off-by: default avatarShawn Landden <shawn@churchofgit.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      d2671a6e
    • Veaceslav Falico's avatar
      af_packet: block BH in prb_shutdown_retire_blk_timer() · a4da7a3c
      Veaceslav Falico authored 
      [ Upstream commit ec6f809f ]

Currently we're using plain spin_lock() in prb_shutdown_retire_blk_timer(),
however the timer might fire right in the middle and thus try to re-aquire
the same spinlock, leaving us in a endless loop.

To fix that, use the spin_lock_bh() to block it.

Fixes: f6fb8f10 ("af-packet: TPACKET_V3 flexible buffer implementation.")
CC: "David S. Miller" <davem@davemloft.net>
CC: Daniel Borkmann <dborkman@redhat.com>
CC: Willem de Bruijn <willemb@google.com>
CC: Phil Sutter <phil@nwl.cc>
CC: Eric Dumazet <edumazet@google.com>
Reported-by: default avatarJan Stancek <jstancek@redhat.com>
Tested-by: default avatarJan Stancek <jstancek@redhat.com>
Signed-off-by: default avatarVeaceslav Falico <vfalico@redhat.com>
Acked-by: default avatarDaniel Borkmann <dborkman@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      a4da7a3c
    • Daniel Borkmann's avatar
      packet: fix use after free race in send path when dev is released · 63485176
      Daniel Borkmann authored 
      [ Upstream commit e40526cb ]

Salam reported a use after free bug in PF_PACKET that occurs when
we're sending out frames on a socket bound device and suddenly the
net device is being unregistered. It appears that commit 827d9780
introduced a possible race condition between {t,}packet_snd() and
packet_notifier(). In the case of a bound socket, packet_notifier()
can drop the last reference to the net_device and {t,}packet_snd()
might end up suddenly sending a packet over a freed net_device.

To avoid reverting 827d9780 and thus introducing a performance
regression compared to the current state of things, we decided to
hold a cached RCU protected pointer to the net device and maintain
it on write side via bind spin_lock protected register_prot_hook()
and __unregister_prot_hook() calls.

In {t,}packet_snd() path, we access this pointer under rcu_read_lock
through packet_cached_dev_get() that holds reference to the device
to prevent it from being freed through packet_notifier() while
we're in send path. This is okay to do as dev_put()/dev_hold() are
per-cpu counters, so this should not be a performance issue. Also,
the code simplifies a bit as we don't need need_rls_dev anymore.

Fixes: 827d9780 ("af-packet: Use existing netdev reference for bound sockets.")
Reported-by: default avatarSalam Noureddine <noureddine@aristanetworks.com>
Signed-off-by: default avatarDaniel Borkmann <dborkman@redhat.com>
Signed-off-by: default avatarSalam Noureddine <noureddine@aristanetworks.com>
Cc: Ben Greear <greearb@candelatech.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      63485176
    • Ding Tianhong's avatar
      bridge: flush br's address entry in fdb when remove the bridge dev · 61258c16
      Ding Tianhong authored 
      [ Upstream commit f8730420 ]

When the following commands are executed:

brctl addbr br0
ifconfig br0 hw ether <addr>
rmmod bridge

The calltrace will occur:

[  563.312114] device eth1 left promiscuous mode
[  563.312188] br0: port 1(eth1) entered disabled state
[  563.468190] kmem_cache_destroy bridge_fdb_cache: Slab cache still has objects
[  563.468197] CPU: 6 PID: 6982 Comm: rmmod Tainted: G           O 3.12.0-0.7-default+ #9
[  563.468199] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[  563.468200]  0000000000000880 ffff88010f111e98 ffffffff814d1c92 ffff88010f111eb8
[  563.468204]  ffffffff81148efd ffff88010f111eb8 0000000000000000 ffff88010f111ec8
[  563.468206]  ffffffffa062a270 ffff88010f111ed8 ffffffffa063ac76 ffff88010f111f78
[  563.468209] Call Trace:
[  563.468218]  [<ffffffff814d1c92>] dump_stack+0x6a/0x78
[  563.468234]  [<ffffffff81148efd>] kmem_cache_destroy+0xfd/0x100
[  563.468242]  [<ffffffffa062a270>] br_fdb_fini+0x10/0x20 [bridge]
[  563.468247]  [<ffffffffa063ac76>] br_deinit+0x4e/0x50 [bridge]
[  563.468254]  [<ffffffff810c7dc9>] SyS_delete_module+0x199/0x2b0
[  563.468259]  [<ffffffff814e0922>] system_call_fastpath+0x16/0x1b
[  570.377958] Bridge firewalling registered

--------------------------- cut here -------------------------------

The reason is that when the bridge dev's address is changed, the
br_fdb_change_mac_address() will add new address in fdb, but when
the bridge was removed, the address entry in the fdb did not free,
the bridge_fdb_cache still has objects when destroy the cache, Fix
this by flushing the bridge address entry when removing the bridge.

v2: according to the Toshiaki Makita and Vlad's suggestion, I only
    delete the vlan0 entry, it still have a leak here if the vlan id
    is other number, so I need to call fdb_delete_by_port(br, NULL, 1)
    to flush all entries whose dst is NULL for the bridge.
Suggested-by: default avatarToshiaki Makita <toshiaki.makita1@gmail.com>
Suggested-by: default avatarVlad Yasevich <vyasevich@gmail.com>
Signed-off-by: default avatarDing Tianhong <dingtianhong@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      61258c16
    • Vlad Yasevich's avatar
      net: core: Always propagate flag changes to interfaces · 9793558a
      Vlad Yasevich authored 
      [ Upstream commit d2615bf4 ]

The following commit:
    b6c40d68
    net: only invoke dev->change_rx_flags when device is UP

tried to fix a problem with VLAN devices and promiscuouse flag setting.
The issue was that VLAN device was setting a flag on an interface that
was down, thus resulting in bad promiscuity count.
This commit blocked flag propagation to any device that is currently
down.

A later commit:
    deede2fa
    vlan: Don't propagate flag changes on down interfaces

fixed VLAN code to only propagate flags when the VLAN interface is up,
thus fixing the same issue as above, only localized to VLAN.

The problem we have now is that if we have create a complex stack
involving multiple software devices like bridges, bonds, and vlans,
then it is possible that the flags would not propagate properly to
the physical devices.  A simple examle of the scenario is the
following:

  eth0----> bond0 ----> bridge0 ---> vlan50

If bond0 or eth0 happen to be down at the time bond0 is added to
the bridge, then eth0 will never have promisc mode set which is
currently required for operation as part of the bridge.  As a
result, packets with vlan50 will be dropped by the interface.

The only 2 devices that implement the special flag handling are
VLAN and DSA and they both have required code to prevent incorrect
flag propagation.  As a result we can remove the generic solution
introduced in b6c40d68 and leave
it to the individual devices to decide whether they will block
flag propagation or not.
Reported-by: default avatarStefan Priebe <s.priebe@profihost.ag>
Suggested-by: default avatarVeaceslav Falico <vfalico@redhat.com>
Signed-off-by: default avatarVlad Yasevich <vyasevic@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      9793558a
    • Ying Xue's avatar
      atm: idt77252: fix dev refcnt leak · 12263a24
      Ying Xue authored 
      [ Upstream commit b5de4a22 ]

init_card() calls dev_get_by_name() to get a network deceive. But it
doesn't decrease network device reference count after the device is
used.
Signed-off-by: default avatarYing Xue <ying.xue@windriver.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      12263a24
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