This fix addresses two problems in the way the DSCP field is formulated
on the encapsulating header of IPv6 tunnels.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195661
1) The IPv6 tunneling code was manipulating the DSCP field of the
encapsulating packet using the 32b flowlabel. Since the flowlabel is
only the lower 20b it was incorrect to assume that the upper 12b
containing the DSCP and ECN fields would remain intact when formulating
the encapsulating header. This fix handles the 'inherit' and
'fixed-value' DSCP cases explicitly using the extant dsfield u8 variable.
2) The use of INET_ECN_encapsulate(0, dsfield) in ip6_tnl_xmit was
incorrect and resulted in the DSCP value always being set to 0.
Commit 90427ef5d2 ("ipv6: fix flow labels when the traffic class
is non-0") caused the regression by masking out the flowlabel
which exposed the incorrect handling of the DSCP portion of the
flowlabel in ip6_tunnel and ip6_gre.
Fixes: 90427ef5d2 ("ipv6: fix flow labels when the traffic class is non-0")
Signed-off-by: Peter Dawson <peter.a.dawson@boeing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
sometimes ICMP replies to INIT chunks are ignored by the client, even if
the encapsulated SCTP headers match an open socket. This happens when the
ICMP packet is carried by a paged skb: use skb_header_pointer() to read
packet contents beyond the SCTP header, so that chunk header and initiate
tag are validated correctly.
v2:
- don't use skb_header_pointer() to read the transport header, since
icmp_socket_deliver() already puts these 8 bytes in the linear area.
- change commit message to make specific reference to INIT chunks.
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is a race condition in llc_ui_bind if two or more processes/threads
try to bind a same socket.
If more processes/threads bind a same socket success that will lead to
two problems, one is this action is not what we expected, another is
will lead to kernel in unstable status or oops(in my simple test case,
cause llc2.ko can't unload).
The current code is test SOCK_ZAPPED bit to avoid a process to
bind a same socket twice but that is can't avoid more processes/threads
try to bind a same socket at the same time.
So, add lock_sock in llc_ui_bind like others, such as llc_ui_connect.
Signed-off-by: Lin Zhang <xiaolou4617@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull block fixes from Jens Axboe:
"A collection of fixes that should go into this series. This contains:
- A set of NVMe fixes, pulled from Christoph. This includes a set of
fixes for the fiber channel bits from James Smart, rdma queue depth
fix from Marta, controller removal fixes from Ming, and some more
APST quirk updates from Andy.
- A blk-mq debugfs fix from Bart, fixing a problem with the
untangling of the sysfs and debugfs blk-mq bits that was added in
this series.
- Error code fix in add_partition() from Dan.
- A small series of fixes for the new blk-throttle code from Shaohua"
* 'for-linus' of git://git.kernel.dk/linux-block: (21 commits)
blk-mq: Only register debugfs attributes for blk-mq queues
nvme: Quirk APST on Intel 600P/P3100 devices
nvme: only setup block integrity if supported by the driver
nvme: replace is_flags field in nvme_ctrl_ops with a flags field
nvme-pci: consistencly use ctrl->device for logging
partitions/msdos: FreeBSD UFS2 file systems are not recognized
block: fix an error code in add_partition()
blk-throttle: force user to configure all settings for io.low
blk-throttle: respect 0 bps/iops settings for io.low
blk-throttle: output some debug info in trace
blk-throttle: add hierarchy support for latency target and idle time
nvme_fc: remove extra controller reference taken on reconnect
nvme_fc: correct nvme status set on abort
nvme_fc: set logging level on resets/deletes
nvme_fc: revise comment on teardown
nvme_fc: Support ctrl_loss_tmo
nvme_fc: get rid of local reconnect_delay
blk-mq: remove blk_mq_abort_requeue_list()
nvme: avoid to use blk_mq_abort_requeue_list()
nvme: use blk_mq_start_hw_queues() in nvme_kill_queues()
...
messenger patch from Zheng and Luis' fallocate fix.
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Merge tag 'ceph-for-4.12-rc3' of git://github.com/ceph/ceph-client
Pul ceph fixes from Ilya Dryomov:
"A bunch of make W=1 and static checker fixups, a RECONNECT_SEQ
messenger patch from Zheng and Luis' fallocate fix"
* tag 'ceph-for-4.12-rc3' of git://github.com/ceph/ceph-client:
ceph: check that the new inode size is within limits in ceph_fallocate()
libceph: cleanup old messages according to reconnect seq
libceph: NULL deref on crush_decode() error path
libceph: fix error handling in process_one_ticket()
libceph: validate blob_struct_v in process_one_ticket()
libceph: drop version variable from ceph_monmap_decode()
libceph: make ceph_msg_data_advance() return void
libceph: use kbasename() and kill ceph_file_part()
Hikey board. Together with a couple of DTS updates for the Hikey board we have
also extended the mmc pwrseq_simple, to support a new power-off-delay-us DT
property, as that was required to enable a graceful power off sequence for the
WiFi chip.
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Merge tag 'mmc-v4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"This contains fixes to make the WiFi work again for the ARM64 Hikey
board.
Together with a couple of DTS updates for the Hikey board we have also
extended the mmc pwrseq_simple, to support a new power-off-delay-us DT
property, as that was required to enable a graceful power off sequence
for the WiFi chip"
* tag 'mmc-v4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
arm64: dts: hikey: Fix WiFi support
arm64: dts: hi6220: Move board data from the dwmmc nodes to hikey dts
arm64: dts: hikey: Add the SYS_5V and the VDD_3V3 regulators
arm64: dts: hi6220: Move the fixed_5v_hub regulator to the hikey dts
arm64: dts: hikey: Add clock for the pmic mfd
mfd: dts: hi655x: Add clock binding for the pmic
mmc: pwrseq_simple: Parse DTS for the power-off-delay-us property
mmc: dt: pwrseq-simple: Invent power-off-delay-us
This contains a few HD-audio device-specific quirks and an endianess
fix for USB-audio, as well as the update of quirk model list
document. All fixes are small and trivial.
The document update could have been postponed, but it's a good thing
for user and has absolutely zero risk of breakage, so included here.
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Merge tag 'sound-4.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"This contains a few HD-audio device-specific quirks and an endianess
fix for USB-audio, as well as the update of quirk model list document.
All fixes are small and trivial.
The document update could have been postponed, but it's a good thing
for user and has absolutely zero risk of breakage, so included here"
* tag 'sound-4.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - apply STAC_9200_DELL_M22 quirk for Dell Latitude D430
ALSA: hda - Update the list of quirk models
ALSA: hda - Provide dual-codecs model option for a few Realtek codecs
ALSA: hda - Apply dual-codec quirk for MSI Z270-Gaming mobo
ALSA: hda - No loopback on ALC299 codec
ALSA: usb-audio: fix Amanero Combo384 quirk on big-endian hosts
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Merge tag 'drm-fixes-for-v4.12-rc3' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"Not a whole lot happening here, a set of amdgpu fixes and one core
deadlock fix, and some misc drivers fixes"
* tag 'drm-fixes-for-v4.12-rc3' of git://people.freedesktop.org/~airlied/linux:
drm/amdgpu: fix null point error when rmmod amdgpu.
drm/amd/powerplay: fix a signedness bugs
drm/amdgpu: fix NULL pointer panic of emit_gds_switch
drm/radeon: Unbreak HPD handling for r600+
drm/amd/powerplay/smu7: disable mclk switching for high refresh rates
drm/amd/powerplay/smu7: add vblank check for mclk switching (v2)
drm/radeon/ci: disable mclk switching for high refresh rates (v2)
drm/amdgpu/ci: disable mclk switching for high refresh rates (v2)
drm/amdgpu: fix fundamental suspend/resume issue
drm/gma500/psb: Actually use VBT mode when it is found
drm: Fix deadlock retry loop in page_flip_ioctl
drm: qxl: Delay entering atomic context during cursor update
drm/radeon: Fix oops upon driver load on PowerXpress laptops
We need to return an error for any call that asks for MSI / MSI-X
vectors only, so that non-trivial fallback logic can work properly.
Also valid dev->irq and use the "correct" errno value based on feedback
from Linus.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Fixes: aff17164 ("PCI: Provide sensible IRQ vector alloc/free routines")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Christoph writes:
"A couple of fixes for the next rc on the nvme front. Various FC fixes
from James, controller removal fixes from Ming (including a block layer
patch), a APST related device quirk from Andy, a RDMA fix for small
queue depth device from Marta, as well as fixes for the lack of
metadata support in non-PCIe drivers and the printk logging format from
me."
The code in blk-mq-debugfs.c assumes that it is working on a blk-mq
queue and is not intended to work on a blk-sq queue. Hence only
register blk-mq debugfs attributes for blk-mq queues.
Fixes: commit 9c1051aacd ("blk-mq: untangle debugfs and sysfs")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This ensures that adjustments to x86_platform done by the hypervisor
setup is already respected by this simple calibration.
The current user of this, introduced by 1b5aeebf3a ("x86/earlyprintk:
Add support for earlyprintk via USB3 debug port"), comes much later
into play.
Fixes: dd759d93f4 ("x86/timers: Add simple udelay calibration")
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: http://lkml.kernel.org/r/5e89fe60-aab3-2c1c-aba8-32f8ad376189@siemens.com
They have known firmware bugs. A fix is apparently in the works --
once fixed firmware is available, someone from Intel (Hi, Keith!)
can adjust the quirk accordingly.
Cc: stable@vger.kernel.org # v4.11
Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: Mario Limonciello <mario_limonciello@dell.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
vlv_display_irq_postinstall() enables the LPE audio interrupts
regardless of whether the LPE audio irq chip has masked/unmasked
them. Also the irqchip masking/unmasking doesn't consider the state
of the display power well or the device, and hence just leads to
dmesg spew when it tries to access the hardware while it's powered
down.
If the current way works, then we don't need to do anything in the
mask/unmask hooks. If it doesn't work, well, then we'd need to properly
track whether the irqchip has masked/unmasked the interrupts when
we enable display interrupts. And the mask/unmask hooks would need
to check whether display interrupts are even enabled before frobbing
with he registers.
So let's just assume the current way works and neuter the mask/unmask
hooks. Also clean up vlv_display_irq_postinstall() a bit and stop
it from trying to unmask/enable the LPE C interrupt on VLV since it
doesn't exist.
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170427160231.13337-4-ville.syrjala@linux.intel.com
Reviewed-by: Takashi Iwai <tiwai@suse.de>
(cherry picked from commit ebf5f92147)
Reference: http://mid.mail-archive.com/874cf6d3-4e45-d4cf-e662-eb972490d2ce@redhat.com
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Currently only the PCIe driver supports metadata, so we should not claim
integrity support for the other drivers. This prevents nasty crashes
with targets that advertise metadata support on fabrics.
Also use the opportunity to factor out some code into a separate helper
that isn't even compiled if CONFIG_BLK_DEV_INTEGRITY is disabled.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
So that we can have more flags for transport-specific behavior.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
This is what most of the code already does and gives much more useful
prefixes than the device embedded in the pci_dev.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
A bunch of bug fixes:
- Fix display flickering on some chips at high refresh rates
- suspend/resume fix
- hotplug fix
- a couple of segfault fixes for certain cases
* 'drm-fixes-4.12' of git://people.freedesktop.org/~agd5f/linux:
drm/amdgpu: fix null point error when rmmod amdgpu.
drm/amd/powerplay: fix a signedness bugs
drm/amdgpu: fix NULL pointer panic of emit_gds_switch
drm/radeon: Unbreak HPD handling for r600+
drm/amd/powerplay/smu7: disable mclk switching for high refresh rates
drm/amd/powerplay/smu7: add vblank check for mclk switching (v2)
drm/radeon/ci: disable mclk switching for high refresh rates (v2)
drm/amdgpu/ci: disable mclk switching for high refresh rates (v2)
drm/amdgpu: fix fundamental suspend/resume issue
Core Changes:
- Don't drop vblank reference more than once in cases of ww retry (Daniel)
Driver Changes:
- radeon: Fix oops during radeon probe trying to reference wrong device (Lukas)
- qxl: Avoid sleeping while in atomic context on cursor update (Gabriel)
- gma500: Use VBT mode instead of pre-programmed mode for LVDS (Patrik)
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
* tag 'drm-misc-fixes-2017-05-25' of git://anongit.freedesktop.org/git/drm-misc:
drm/gma500/psb: Actually use VBT mode when it is found
drm: Fix deadlock retry loop in page_flip_ioctl
drm: qxl: Delay entering atomic context during cursor update
drm/radeon: Fix oops upon driver load on PowerXpress laptops
In the loadbalance arp monitoring scheme, when a slave link change is
detected, the slave->link is immediately updated and slave_state_changed
is set. Later down the function, the rtnl_lock is acquired and the
changes are committed, updating the bond link state.
However, the acquisition of the rtnl_lock can fail. The next time the
monitor runs, since slave->link is already updated, it determines that
link is unchanged. This results in the bond link state permanently out
of sync with the slave link.
This patch modifies bond_loadbalance_arp_mon() to handle link changes
identical to bond_ab_arp_{inspect/commit}(). The new link state is
maintained in slave->new_link until we're ready to commit at which point
it's copied into slave->link.
NOTE: miimon_{inspect/commit}() has a more complex state machine
requiring the use of the bond_{propose,commit}_link_state() functions
which maintains the intermediate state in slave->link_new_state. The arp
monitors don't require that.
Testing: This bug is very easy to reproduce with the following steps.
1. In a loop, toggle a slave link of a bond slave interface.
2. In a separate loop, do ifconfig up/down of an unrelated interface to
create contention for rtnl_lock.
Within a few iterations, the bond link goes out of sync with the slave
link.
Signed-off-by: Nithin Nayak Sujir <nsujir@tintri.com>
Cc: Mahesh Bandewar <maheshb@google.com>
Cc: Jay Vosburgh <jay.vosburgh@canonical.com>
Acked-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Some JITs can optimize comparisons with zero. Add a couple of
BPF_JSGE tests against immediate zero.
Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Borkmann says:
====================
Various BPF fixes
Follow-up to fix incorrect pruning when alignment tracking is
in use and to properly clear regs after call to not leave stale
data behind, also a fix that adds bpf_clone_redirect to the
bpf_helper_changes_pkt_data helper and exposes correct map_flags
for lpm map into fdinfo. For details, please see individual
patches.
v1 -> v2:
- Reworked first patch so that env->strict_alignment is the
final indicator on whether we have to deal with strict
alignment rather than having CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
checks on various locations, so only checking env->strict_alignment
is sufficient after that. Thanks for spotting, Dave!
- Added patch 3 and 4.
- Rest as is.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch adds various verifier test cases:
1) A test case for the pruning issue when tracking alignment
is used.
2) Various PTR_TO_MAP_VALUE_OR_NULL tests to make sure pointer
arithmetic turns such register into UNKNOWN_VALUE type.
3) Test cases for the special treatment of LD_ABS/LD_IND to
make sure verifier doesn't break calling convention here.
Latter is needed, since f.e. arm64 JIT uses r1 - r5 for
storing temporary data, so they really must be marked as
NOT_INIT.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
trie_alloc() always needs to have BPF_F_NO_PREALLOC passed in via
attr->map_flags, since it does not support preallocation yet. We
check the flag, but we never copy the flag into trie->map.map_flags,
which is later on exposed into fdinfo and used by loaders such as
iproute2. Latter uses this in bpf_map_selfcheck_pinned() to test
whether a pinned map has the same spec as the one from the BPF obj
file and if not, bails out, which is currently the case for lpm
since it exposes always 0 as flags.
Also copy over flags in array_map_alloc() and stack_map_alloc().
They always have to be 0 right now, but we should make sure to not
miss to copy them over at a later point in time when we add actual
flags for them to use.
Fixes: b95a5c4db0 ("bpf: add a longest prefix match trie map implementation")
Reported-by: Jarno Rajahalme <jarno@covalent.io>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
The bpf_clone_redirect() still needs to be listed in
bpf_helper_changes_pkt_data() since we call into
bpf_try_make_head_writable() from there, thus we need
to invalidate prior pkt regs as well.
Fixes: 36bbef52c7 ("bpf: direct packet write and access for helpers for clsact progs")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently, after performing helper calls, we clear all caller saved
registers, that is r0 - r5 and fill r0 depending on struct bpf_func_proto
specification. The way we reset these regs can affect pruning decisions
in later paths, since we only reset register's imm to 0 and type to
NOT_INIT. However, we leave out clearing of other variables such as id,
min_value, max_value, etc, which can later on lead to pruning mismatches
due to stale data.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently, when we enforce alignment tracking on direct packet access,
the verifier lets the following program pass despite doing a packet
write with unaligned access:
0: (61) r2 = *(u32 *)(r1 +76)
1: (61) r3 = *(u32 *)(r1 +80)
2: (61) r7 = *(u32 *)(r1 +8)
3: (bf) r0 = r2
4: (07) r0 += 14
5: (25) if r7 > 0x1 goto pc+4
R0=pkt(id=0,off=14,r=0) R1=ctx R2=pkt(id=0,off=0,r=0)
R3=pkt_end R7=inv,min_value=0,max_value=1 R10=fp
6: (2d) if r0 > r3 goto pc+1
R0=pkt(id=0,off=14,r=14) R1=ctx R2=pkt(id=0,off=0,r=14)
R3=pkt_end R7=inv,min_value=0,max_value=1 R10=fp
7: (63) *(u32 *)(r0 -4) = r0
8: (b7) r0 = 0
9: (95) exit
from 6 to 8:
R0=pkt(id=0,off=14,r=0) R1=ctx R2=pkt(id=0,off=0,r=0)
R3=pkt_end R7=inv,min_value=0,max_value=1 R10=fp
8: (b7) r0 = 0
9: (95) exit
from 5 to 10:
R0=pkt(id=0,off=14,r=0) R1=ctx R2=pkt(id=0,off=0,r=0)
R3=pkt_end R7=inv,min_value=2 R10=fp
10: (07) r0 += 1
11: (05) goto pc-6
6: safe <----- here, wrongly found safe
processed 15 insns
However, if we enforce a pruning mismatch by adding state into r8
which is then being mismatched in states_equal(), we find that for
the otherwise same program, the verifier detects a misaligned packet
access when actually walking that path:
0: (61) r2 = *(u32 *)(r1 +76)
1: (61) r3 = *(u32 *)(r1 +80)
2: (61) r7 = *(u32 *)(r1 +8)
3: (b7) r8 = 1
4: (bf) r0 = r2
5: (07) r0 += 14
6: (25) if r7 > 0x1 goto pc+4
R0=pkt(id=0,off=14,r=0) R1=ctx R2=pkt(id=0,off=0,r=0)
R3=pkt_end R7=inv,min_value=0,max_value=1
R8=imm1,min_value=1,max_value=1,min_align=1 R10=fp
7: (2d) if r0 > r3 goto pc+1
R0=pkt(id=0,off=14,r=14) R1=ctx R2=pkt(id=0,off=0,r=14)
R3=pkt_end R7=inv,min_value=0,max_value=1
R8=imm1,min_value=1,max_value=1,min_align=1 R10=fp
8: (63) *(u32 *)(r0 -4) = r0
9: (b7) r0 = 0
10: (95) exit
from 7 to 9:
R0=pkt(id=0,off=14,r=0) R1=ctx R2=pkt(id=0,off=0,r=0)
R3=pkt_end R7=inv,min_value=0,max_value=1
R8=imm1,min_value=1,max_value=1,min_align=1 R10=fp
9: (b7) r0 = 0
10: (95) exit
from 6 to 11:
R0=pkt(id=0,off=14,r=0) R1=ctx R2=pkt(id=0,off=0,r=0)
R3=pkt_end R7=inv,min_value=2
R8=imm1,min_value=1,max_value=1,min_align=1 R10=fp
11: (07) r0 += 1
12: (b7) r8 = 0
13: (05) goto pc-7 <----- mismatch due to r8
7: (2d) if r0 > r3 goto pc+1
R0=pkt(id=0,off=15,r=15) R1=ctx R2=pkt(id=0,off=0,r=15)
R3=pkt_end R7=inv,min_value=2
R8=imm0,min_value=0,max_value=0,min_align=2147483648 R10=fp
8: (63) *(u32 *)(r0 -4) = r0
misaligned packet access off 2+15+-4 size 4
The reason why we fail to see it in states_equal() is that the
third test in compare_ptrs_to_packet() ...
if (old->off <= cur->off &&
old->off >= old->range && cur->off >= cur->range)
return true;
... will let the above pass. The situation we run into is that
old->off <= cur->off (14 <= 15), meaning that prior walked paths
went with smaller offset, which was later used in the packet
access after successful packet range check and found to be safe
already.
For example: Given is R0=pkt(id=0,off=0,r=0). Adding offset 14
as in above program to it, results in R0=pkt(id=0,off=14,r=0)
before the packet range test. Now, testing this against R3=pkt_end
with 'if r0 > r3 goto out' will transform R0 into R0=pkt(id=0,off=14,r=14)
for the case when we're within bounds. A write into the packet
at offset *(u32 *)(r0 -4), that is, 2 + 14 -4, is valid and
aligned (2 is for NET_IP_ALIGN). After processing this with
all fall-through paths, we later on check paths from branches.
When the above skb->mark test is true, then we jump near the
end of the program, perform r0 += 1, and jump back to the
'if r0 > r3 goto out' test we've visited earlier already. This
time, R0 is of type R0=pkt(id=0,off=15,r=0), and we'll prune
that part because this time we'll have a larger safe packet
range, and we already found that with off=14 all further insn
were already safe, so it's safe as well with a larger off.
However, the problem is that the subsequent write into the packet
with 2 + 15 -4 is then unaligned, and not caught by the alignment
tracking. Note that min_align, aux_off, and aux_off_align were
all 0 in this example.
Since we cannot tell at this time what kind of packet access was
performed in the prior walk and what minimal requirements it has
(we might do so in the future, but that requires more complexity),
fix it to disable this pruning case for strict alignment for now,
and let the verifier do check such paths instead. With that applied,
the test cases pass and reject the program due to misalignment.
Fixes: d117441674 ("bpf: Track alignment of register values in the verifier.")
Reference: http://patchwork.ozlabs.org/patch/761909/
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 7d472a59c0 ("arp: always override
existing neigh entries with gratuitous ARP") introduced a compiler
warning:
net/ipv4/arp.c:880:35: warning: 'addr_type' may be used uninitialized in
this function [-Wmaybe-uninitialized]
While the code logic seems to be correct and doesn't allow the variable
to be used uninitialized, and the warning is not consistently
reproducible, it's still worth fixing it for other people not to waste
time looking at the warning in case it pops up in the build environment.
Yes, compiler is probably at fault, but we will need to accommodate.
Fixes: 7d472a59c0 ("arp: always override existing neigh entries with gratuitous ARP")
Signed-off-by: Ihar Hrachyshka <ihrachys@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fastopen API should be used to perform fastopen operations on the TCP
socket. It does not make sense to use fastopen API to perform disconnect
by calling it with AF_UNSPEC. The fastopen data path is also prone to
race conditions and bugs when using with AF_UNSPEC.
One issue reported and analyzed by Vegard Nossum is as follows:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Thread A: Thread B:
------------------------------------------------------------------------
sendto()
- tcp_sendmsg()
- sk_stream_memory_free() = 0
- goto wait_for_sndbuf
- sk_stream_wait_memory()
- sk_wait_event() // sleep
| sendto(flags=MSG_FASTOPEN, dest_addr=AF_UNSPEC)
| - tcp_sendmsg()
| - tcp_sendmsg_fastopen()
| - __inet_stream_connect()
| - tcp_disconnect() //because of AF_UNSPEC
| - tcp_transmit_skb()// send RST
| - return 0; // no reconnect!
| - sk_stream_wait_connect()
| - sock_error()
| - xchg(&sk->sk_err, 0)
| - return -ECONNRESET
- ... // wake up, see sk->sk_err == 0
- skb_entail() on TCP_CLOSE socket
If the connection is reopened then we will send a brand new SYN packet
after thread A has already queued a buffer. At this point I think the
socket internal state (sequence numbers etc.) becomes messed up.
When the new connection is closed, the FIN-ACK is rejected because the
sequence number is outside the window. The other side tries to
retransmit,
but __tcp_retransmit_skb() calls tcp_trim_head() on an empty skb which
corrupts the skb data length and hits a BUG() in copy_and_csum_bits().
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Hence, this patch adds a check for AF_UNSPEC in the fastopen data path
and return EOPNOTSUPP to user if such case happens.
Fixes: cf60af03ca ("tcp: Fast Open client - sendmsg(MSG_FASTOPEN)")
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The default value for somaxconn is set in sysctl_core_net_init(), but this
function is not called when kernel is configured without CONFIG_SYSCTL.
This results in the kernel not being able to accept TCP connections,
because the backlog has zero size. Usually, the user ends up with:
"TCP: request_sock_TCP: Possible SYN flooding on port 7. Dropping request. Check SNMP counters."
If SYN cookies are not enabled the connection is rejected.
Before ef547f2ac1 (tcp: remove max_qlen_log), the effects were less
severe, because the backlog was always at least eight slots long.
Signed-off-by: Roman Kapl <roman.kapl@sysgo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use wait_for_completion_timeout() instead of
wait_for_completion_interruptible_timeout() to avoid stray signals ruining
firmware update. Our timeout is only 300 msec so we are fine simply letting
it expire in case device misbehaves.
Signed-off-by: KT Liao <kt.liao@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Some old touchpad FWs need to have interrupt cleared before issuing reset
command after updating firmware. We clear interrupt by attempting to read
full report from the controller, and discarding any data read.
Signed-off-by: KT Liao <kt.liao@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Add null check to avoid a potential null pointer dereference.
Addresses-Coverity-ID: 1408831
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since 9b4437a5b8 ("geneve: Unify LWT and netdev handling.") fill_info
does not return UDP_ZERO_CSUM6_RX when using COLLECT_METADATA. This is
because it uses ip_tunnel_info_af() with the device level info, which is
not valid for COLLECT_METADATA.
Fix by checking for the presence of the actual sockets.
Fixes: 9b4437a5b8 ("geneve: Unify LWT and netdev handling.")
Signed-off-by: Eric Garver <e@erig.me>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently several places in xfs_find_get_desired_pgoff() handle the case
of a missing page. Make them all handled in one place after the loop has
terminated.
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
There is an off-by-one error in loop termination conditions in
xfs_find_get_desired_pgoff() since 'end' may index a page beyond end of
desired range if 'endoff' is page aligned. It doesn't have any visible
effects but still it is good to fix it.
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
XFS SEEK_HOLE implementation could miss a hole in an unwritten extent as
can be seen by the following command:
xfs_io -c "falloc 0 256k" -c "pwrite 0 56k" -c "pwrite 128k 8k"
-c "seek -h 0" file
wrote 57344/57344 bytes at offset 0
56 KiB, 14 ops; 0.0000 sec (49.312 MiB/sec and 12623.9856 ops/sec)
wrote 8192/8192 bytes at offset 131072
8 KiB, 2 ops; 0.0000 sec (70.383 MiB/sec and 18018.0180 ops/sec)
Whence Result
HOLE 139264
Where we can see that hole at offset 56k was just ignored by SEEK_HOLE
implementation. The bug is in xfs_find_get_desired_pgoff() which does
not properly detect the case when pages are not contiguous.
Fix the problem by properly detecting when found page has larger offset
than expected.
CC: stable@vger.kernel.org
Fixes: d126d43f63
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
xfs_find_get_desired_pgoff() is used to search for offset of hole or
data in page range [index, end] (both inclusive), and the max number
of pages to search should be at least one, if end == index.
Otherwise the only page is missed and no hole or data is found,
which is not correct.
When block size is smaller than page size, this can be demonstrated
by preallocating a file with size smaller than page size and writing
data to the last block. E.g. run this xfs_io command on a 1k block
size XFS on x86_64 host.
# xfs_io -fc "falloc 0 3k" -c "pwrite 2k 1k" \
-c "seek -d 0" /mnt/xfs/testfile
wrote 1024/1024 bytes at offset 2048
1 KiB, 1 ops; 0.0000 sec (33.675 MiB/sec and 34482.7586 ops/sec)
Whence Result
DATA EOF
Data at offset 2k was missed, and lseek(2) returned ENXIO.
This is uncovered by generic/285 subtest 07 and 08 on ppc64 host,
where pagesize is 64k. Because a recent change to generic/285
reduced the preallocated file size to smaller than 64k.
Cc: stable@vger.kernel.org # v3.7+
Signed-off-by: Eryu Guan <eguan@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This structure copy was throwing unaligned access warnings on sparc64:
Kernel unaligned access at TPC[1043c088] xfs_btree_visit_blocks+0x88/0xe0 [xfs]
xfs_btree_copy_ptrs does a memcpy, which avoids it.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Providing "scv" support to userspace requires kernel support, so it
must be advertised as independently to the base ISA 3 instruction set.
The darn instruction relies on firmware enablement, so it has been
decided to split this out from the core ISA 3 feature as well.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Commit ac29c64089 ("powerpc/mm: Replace _PAGE_USER with
_PAGE_PRIVILEGED") swapped _PAGE_USER for _PAGE_PRIVILEGED, and
introduced check_pte_access() which denied kernel access to
non-_PAGE_PRIVILEGED pages.
However, it didn't add _PAGE_PRIVILEGED to the hash fault handler
for spufs' kernel accesses, so the DMAs required to establish SPE
memory no longer work.
This change adds _PAGE_PRIVILEGED to the hash fault handler for
kernel accesses.
Fixes: ac29c64089 ("powerpc/mm: Replace _PAGE_USER with _PAGE_PRIVILEGED")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Reported-by: Sombat Tragolgosol <sombat3960@gmail.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Currently if you disable CONFIG_PPC_RADIX_MMU you'll crash on boot on
a P9. This is because we still set MMU_FTR_TYPE_RADIX via
ibm,pa-features and MMU_FTR_TYPE_RADIX is what's used for code patching
in much of the asm code (ie. slb_miss_realmode)
This patch fixes the problem by stopping MMU_FTR_TYPE_RADIX from being
set from ibm.pa-features.
We may eventually end up removing the CONFIG_PPC_RADIX_MMU option
completely but until then this fixes the issue.
Fixes: 17a3dd2f5f ("powerpc/mm/radix: Use firmware feature to enable Radix MMU")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
opal_npu_destroy_context() should be called with the NPU PHB, not the
PCIe PHB.
Fixes: 1ab66d1fba ("powerpc/powernv: Introduce address translation services for Nvlink2")
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
The driver calls ioremap() in the probe function but doesn't call
iounmap() in the remove function correspondingly. Do so now.
Follow commit 5c9d6abed9 ("serial: altera_jtaguart: adding iounmap()")
Cc: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit e61c38d85b ("serial: imx: setup DCEDTE early and ensure DCD and
RI irqs to be off") has a flaw: While UCR3 and UFCR were modified using
read-modify-write before it switched to write register values
independent of the previous state. That's a good idea in principle (and
that's why I did it) but needs more care.
This patch reinstates read-modify-write for UFCR and for UCR3 ensures
that RXDMUXSEL and ADNIMP are set for post imx1.
Fixes: e61c38d85b ("serial: imx: setup DCEDTE early and ensure DCD and RI irqs to be off")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Mika Penttilä <mika.penttila@nextfour.com>
Tested-by: Mika Penttilä <mika.penttila@nextfour.com>
Acked-by: Steve Twiss <stwiss.opensource@diasemi.com>
Tested-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This is quite a big update because it includes a rework of the lpfc
driver to separate the NVMe part from the FC part. The reason for
doing this is because two separate trees (the nvme and scsi trees
respectively) want to update the individual components and this
separation will prevent a really nasty cross tree entanglement by the
time we reach the next merge window. The rest of the fixes are the
usual minor sort with no significant security implications.
Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"This is quite a big update because it includes a rework of the lpfc
driver to separate the NVMe part from the FC part.
The reason for doing this is because two separate trees (the nvme and
scsi trees respectively) want to update the individual components and
this separation will prevent a really nasty cross tree entanglement by
the time we reach the next merge window.
The rest of the fixes are the usual minor sort with no significant
security implications"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (25 commits)
scsi: zero per-cmd private driver data for each MQ I/O
scsi: csiostor: fix use after free in csio_hw_use_fwconfig()
scsi: ufs: Clean up some rpm/spm level SysFS nodes upon remove
scsi: lpfc: fix build issue if NVME_FC_TARGET is not defined
scsi: lpfc: Fix NULL pointer dereference during PCI error recovery
scsi: lpfc: update version to 11.2.0.14
scsi: lpfc: Add MDS Diagnostic support.
scsi: lpfc: Fix NVMEI's handling of NVMET's PRLI response attributes
scsi: lpfc: Cleanup entry_repost settings on SLI4 queues
scsi: lpfc: Fix debugfs root inode "lpfc" not getting deleted on driver unload.
scsi: lpfc: Fix NVME I+T not registering NVME as a supported FC4 type
scsi: lpfc: Added recovery logic for running out of NVMET IO context resources
scsi: lpfc: Separate NVMET RQ buffer posting from IO resources SGL/iocbq/context
scsi: lpfc: Separate NVMET data buffer pool fir ELS/CT.
scsi: lpfc: Fix NMI watchdog assertions when running nvmet IOPS tests
scsi: lpfc: Fix NVMEI driver not decrementing counter causing bad rport state.
scsi: lpfc: Fix nvmet RQ resource needs for large block writes.
scsi: lpfc: Adding additional stats counters for nvme.
scsi: lpfc: Fix system crash when port is reset.
scsi: lpfc: Fix used-RPI accounting problem.
...
Peter Dawson
Davide Caratti
linzhang
Linus Torvalds
Christoph Hellwig
Jens Axboe
Bart Van Assche
Jan Kiszka
Andy Lutomirski
Ville Syrjälä
Jani Nikula
Dave Airlie
Nithin Sujir
David Daney
David S. Miller
Daniel Borkmann
Ihar Hrachyshka
Wei Wang
Roman Kapl
KT Liao
Gustavo A. R. Silva
Rex Zhu
Eric Garver
Jan Kara
Eryu Guan
Eric Sandeen
Nicholas Piggin
Jeremy Kerr
Michael Neuling
Alistair Popple
Tobias Klauser
Uwe Kleine-König
Dan Carpenter