For host JIT, there are "jited_len"/"bpf_func" fields in struct bpf_prog
used by all host JIT targets to get jited image and it's length. While for
offload, targets are likely to have different offload mechanisms that these
info are kept in device private data fields.
Therefore, BPF_OBJ_GET_INFO_BY_FD syscall needs an unified way to get JIT
length and contents info for offload targets.
One way is to introduce new callback to parse device private data then fill
those fields in bpf_prog_info. This might be a little heavy, the other way
is to add generic fields which will be initialized by all offload targets.
This patch follow the second approach to introduce two new fields in
struct bpf_dev_offload and teach bpf_prog_get_info_by_fd about them to fill
correct jited_prog_len and jited_prog_insns in bpf_prog_info.
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
syzkaller generated a BPF proglet and triggered a warning with
the following:
0: (b7) r0 = 0
1: (d5) if r0 s<= 0x0 goto pc+0
R0=inv0 R1=ctx(id=0,off=0,imm=0) R10=fp0
2: (1f) r0 -= r1
R0=inv0 R1=ctx(id=0,off=0,imm=0) R10=fp0
verifier internal error: known but bad sbounds
What happens is that in the first insn, r0's min/max value
are both 0 due to the immediate assignment, later in the jsle
test the bounds are updated for the min value in the false
path, meaning, they yield smin_val = 1, smax_val = 0, and when
ctx pointer is subtracted from r0, verifier bails out with the
internal error and throwing a WARN since smin_val != smax_val
for the known constant.
For min_val > max_val scenario it means that reg_set_min_max()
and reg_set_min_max_inv() (which both refine existing bounds)
demonstrated that such branch cannot be taken at runtime.
In above scenario for the case where it will be taken, the
existing [0, 0] bounds are kept intact. Meaning, the rejection
is not due to a verifier internal error, and therefore the
WARN() is not necessary either.
We could just reject such cases in adjust_{ptr,scalar}_min_max_vals()
when either known scalars have smin_val != smax_val or
umin_val != umax_val or any scalar reg with bounds
smin_val > smax_val or umin_val > umax_val. However, there
may be a small risk of breakage of buggy programs, so handle
this more gracefully and in adjust_{ptr,scalar}_min_max_vals()
just taint the dst reg as unknown scalar when we see ops with
such kind of src reg.
Reported-by: syzbot+6d362cadd45dc0a12ba4@syzkaller.appspotmail.com
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Historically some ISA drivers used the old PCI DMA API with a NULL pdev
argument, but these days this isn't used and not too useful due to the
per-device DMA ops, so remove it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
We need to pass a struct device to the DMA API, even if some architectures
still support that for legacy reasons, and should not mix it with the old
PCI DMA API.
Note that the driver also seems to never actually unmap its DMA mappings,
but to fix that we'll need someone more familar with the driver.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Switch to a plain kzalloc() instead of pci_zalloc_coherent() to allocate
memory for the USB DMA.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Switch to a plain kzalloc() instead of pci_zalloc_coherent() to allocate
memory for the USB DMA.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Instead of calling both of_irq_parse_pci() and irq_create_of_mapping(),
call of_irq_parse_and_map_pci(), which does the same thing. This will allow
making of_irq_parse_pci() a private, static function.
This changes the logic slightly in that the fallback path will also be
taken if irq_create_of_mapping() fails internally.
Signed-off-by: Rob Herring <robh@kernel.org>
[bhelgaas: fold in virq init from Stephen Rothwell <sfr@canb.auug.org.au>]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
This patch fixes some spelling typos found in kfigure.py
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This patch fixes an incorrect path for debugfs in hwpoison.txt
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
At some stage of the conversion pipeline, something thought that the
DocBook entity # should be rendered as NUM instead of #.
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Following what has been done for other subsystems, move the remaining PCI
related code out of drivers/of/ and into drivers/pci/of.c
With this, we can kill a few kconfig symbols.
Signed-off-by: Rob Herring <robh@kernel.org>
[bhelgaas: minor whitespace, comment cleanups]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Frank Rowand <frowand.list@gmail.com>
gcc noticed the kerneldoc was wrongly formatted. Fix it!
drivers/i2c/busses/i2c-rk3x.c:164: warning:
Cannot understand * @grf_offset: ...
on line 164 - I thought it was a doc line
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
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BackMerge tag 'v4.15-rc8' into drm-next
Linux 4.15-rc8
Daniel requested this for so the intel CI won't fall over on drm-next
so often.
The function documentation of leb_write_trylock is copied from
leb_write_lock. Replace the function name with the correct one.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
Fix misspelling of 'available' in function name.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
There is a situation that other modules, like overlayfs, try to get
xattr value with a small buffer, if they get -ERANGE, they will try
again with the proper buffer size. No need to report an error.
Signed-off-by: Rock Lee <rli@sierrawireless.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This driver creates a number of const structures that it stores in
the data field of an of_device_id array.
The data field of an of_device_id structure has type const void *, so
there is no need for a const-discarding cast when putting const values
into such a structure.
Furthermore, adding const to the declaration of the location that
receives a const value from such a field ensures that the compiler
will continue to check that the value is not modified. The
const-discarding cast on the extraction from the data field is thus
no longer needed.
Done using Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
As of v4.15, Kbuild warns about missing MODULE_LICENSE tags:
WARNING: modpost: missing MODULE_LICENSE() in drivers/i2c/busses/i2c-acorn.o
This adds a license, author and description tag, matching the
comment at the start of the acorn i2c driver.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
The trailing semicolon is an empty statement that does no operation.
Removing it since it doesn't do anything.
Signed-off-by: Luis de Bethencourt <luisbg@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Running the following sequence is currently broken:
# tc qdisc add dev foo clsact
# tc filter replace dev foo ingress prio 1 handle 1 bpf da obj bar.o
# tc filter replace dev foo ingress prio 1 handle 1 bpf da obj bar.o
RTNETLINK answers: Invalid argument
The normal expectation on kernel side is that the second command
succeeds replacing the existing program. However, what happens is
in cls_bpf_change(), we bail out with err in the second run in
cls_bpf_offload(). The EINVAL comes directly in cls_bpf_offload()
when comparing prog vs oldprog's gen_flags. In case of above
replace the new prog's gen_flags are 0, but the old ones are 8,
which means TCA_CLS_FLAGS_NOT_IN_HW is set (e.g. drivers not having
cls_bpf offload).
Fix 102740bd94 ("cls_bpf: fix offload assumptions after callback
conversion") in the following way: gen_flags from user space passed
down via netlink cannot include status flags like TCA_CLS_FLAGS_IN_HW
or TCA_CLS_FLAGS_NOT_IN_HW as opposed to oldprog that we previously
loaded. Therefore, it doesn't make any sense to include them in the
gen_flags comparison with the new prog before we even attempt to
offload. Thus, lets fix this before 4.15 goes out.
Fixes: 102740bd94 ("cls_bpf: fix offload assumptions after callback conversion")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In the receive queue for 4096 bytes fragments, the page address
set in the SW data0 field of the descriptor is not the one we got
when doing the reassembly in receive. The page structure was retrieved
from the wrong descriptor into SW data0 which is then causing a
page fault when UDP checksum is accessing data above 1500.
Signed-off-by: Rex Chang <rchang@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The current code copies directly from userspace to ctx->crypto_send, but
doesn't always reinitialize it to 0 on failure. This causes any
subsequent attempt to use this setsockopt to fail because of the
TLS_CRYPTO_INFO_READY check, eventhough crypto_info is not actually
ready.
This should result in a correctly set up socket after the 3rd call, but
currently it does not:
size_t s = sizeof(struct tls12_crypto_info_aes_gcm_128);
struct tls12_crypto_info_aes_gcm_128 crypto_good = {
.info.version = TLS_1_2_VERSION,
.info.cipher_type = TLS_CIPHER_AES_GCM_128,
};
struct tls12_crypto_info_aes_gcm_128 crypto_bad_type = crypto_good;
crypto_bad_type.info.cipher_type = 42;
setsockopt(sock, SOL_TLS, TLS_TX, &crypto_bad_type, s);
setsockopt(sock, SOL_TLS, TLS_TX, &crypto_good, s - 1);
setsockopt(sock, SOL_TLS, TLS_TX, &crypto_good, s);
Fixes: 3c4d755915 ("tls: kernel TLS support")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
do_tls_setsockopt_tx returns 0 without doing anything when crypto_info
is already set. Silent failure is confusing for users.
Fixes: 3c4d755915 ("tls: kernel TLS support")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
During setsockopt(SOL_TCP, TLS_TX), if initialization of the software
context fails in tls_set_sw_offload(), we leak sw_ctx. We also don't
reassign ctx->priv_ctx to NULL, so we can't even do another attempt to
set it up on the same socket, as it will fail with -EEXIST.
Fixes: 3c4d755915 ('tls: kernel TLS support')
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge tag 'linux-can-fixes-for-4.15-20180116' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2018-01-16
this is a pull reqeust of a single patch for net/master:
This patch by Stephane Grosjean fixes a potential bug in the packet
fragmentation in the peak USB driver.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge tag 'linux-can-next-for-4.16-20180116' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next
Marc Kleine-Budde says:
====================
pull-request: can-next 2018-01-16
this is a pull request for net-next/master consisting of 9 patches.
This is a series of patches, some of them initially by Franklin S Cooper
Jr, which was picked up by Faiz Abbas. Faiz Abbas added some patches
while working on this series, I contributed one as well.
The first two patches add support to CAN device infrastructure to limit
the bitrate of a CAN adapter if the used CAN-transceiver has a certain
maximum bitrate.
The remaining patches improve the m_can driver. They add support for
bitrate limiting to the driver, clean up the driver and add support for
runtime PM.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The trailing semicolon is an empty statement that does no operation.
It is completely stripped out by the compiler. Removing it since it doesn't do
anything.
Fixes: 5f35227ea3 ("net: Generalize ndo_gso_check to ndo_features_check")
Signed-off-by: Luis de Bethencourt <luisbg@kernel.org>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Some iommu implementations can merge physically and/or virtually
contiguous segments inside sg_map_dma. The NVMe SGL support does not take
this into account and will warn because of falling off a loop. Pass the
number of mapped segments to nvme_pci_setup_sgls so that the SGL setup
can take the number of mapped segments into account.
Reported-by: Fangjian (Turing) <f.fangjian@huawei.com>
Fixes: a7a7cbe3 ("nvme-pci: add SGL support")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@rimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The driver needs to verify there is a payload with a command before
seeing if it should use SGLs to map it.
Fixes: 955b1b5a00 ("nvme-pci: move use_sgl initialization to nvme_init_iod()")
Reported-by: Paul Menzel <pmenzel+linux-nvme@molgen.mpg.de>
Reviewed-by: Paul Menzel <pmenzel+linux-nvme@molgen.mpg.de>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Calling accept on a TCP socket with a TLS ulp attached results
in two sockets that share the same ulp context.
The ulp context is freed while a socket is destroyed, so
after one of the sockets is released, the second second will
trigger a use after free when it tries to access the ulp context
attached to it.
We restrict the TLS ulp to sockets in ESTABLISHED state
to prevent the scenario above.
Fixes: 3c4d755915 ("tls: kernel TLS support")
Reported-by: syzbot+904e7cd6c5c741609228@syzkaller.appspotmail.com
Signed-off-by: Ilya Lesokhin <ilyal@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
restructure the code which adds support for configuring
PCIe VF via mgmt netdevice. which was added by
commit 7829451c69 ("cxgb4: Add control net_device for
configuring PCIe VF")
Original work by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The fastmap update code might erase the current fastmap anchor PEB
in case it doesn't find any new free PEB. When a power cut happens
in this situation we must not have any outdated fastmap anchor PEB
on the device, because that would be used to attach during next
boot.
The easiest way to make that sure is to erase all outdated fastmap
anchor PEBs synchronously during attach.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Richard Weinberger <richard@nod.at>
Fixes: dbb7d2a88d ("UBI: Add fastmap core")
Cc: <stable@vger.kernel.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
The pointer p is being initialized with one value and a few lines
later being set to a newer replacement value. Clean up the code by
using the latter assignment to p as the initial value. Cleans up
clang warning:
drivers/mtd/ubi/fastmap.c:217:19: warning: Value stored to 'p'
during its initialization is never read
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Memory allocated by kmem_cache_alloc() should not be deallocated with
kfree(). Use kmem_cache_free() instead.
Signed-off-by: Pan Bian <bianpan2016@163.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Similar to commit 714fb87e8b ("ubi: Fix race condition between ubi
device creation and udev"), we should make the volume active before
registering it.
Signed-off-by: Clay McClure <clay@daemons.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
idr_find() is safe under rcu_read_lock() and
maybe_get_net() guarantees that net is alive.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
peernet2id_alloc() is racy without rtnl_lock() as refcount_read(&peer->count)
under net->nsid_lock does not guarantee, peer is alive:
rcu_read_lock()
peernet2id_alloc() ..
spin_lock_bh(&net->nsid_lock) ..
refcount_read(&peer->count) (!= 0) ..
.. put_net()
.. cleanup_net()
.. for_each_net(tmp)
.. spin_lock_bh(&tmp->nsid_lock)
.. __peernet2id(tmp, net) == -1
.. ..
.. ..
__peernet2id_alloc(alloc == true) ..
.. ..
rcu_read_unlock() ..
.. synchronize_rcu()
.. kmem_cache_free(net)
After the above situation, net::netns_id contains id pointing to freed memory,
and any other dereferencing by the id will operate with this freed memory.
Currently, peernet2id_alloc() is used under rtnl_lock() everywhere except
ovs_vport_cmd_fill_info(), and this race can't occur. But peernet2id_alloc()
is generic interface, and better we fix it before someone really starts
use it in wrong context.
v2: Don't place refcount_read(&net->count) under net->nsid_lock
as suggested by Eric W. Biederman <ebiederm@xmission.com>
v3: Rebase on top of net-next
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
r8153 on Dell TB15/16 dock corrupts rx packets.
This change is suggested by Realtek. They guess that the XHCI controller
doesn't have enough buffer, and their guesswork is correct, once the RX
aggregation gets disabled, the issue is gone.
ASMedia is currently working on a real sulotion for this issue.
Dell and ODM confirm the bcdDevice and iSerialNumber is unique for TB16.
Note that TB15 has different bcdDevice and iSerialNumber, which are not
unique values. If you still have TB15, please contact Dell to replace it
with TB16.
BugLink: https://bugs.launchpad.net/bugs/1729674
Cc: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jason Wang says:
====================
tun: allow to attach eBPF filter
This series tries to implement eBPF socket filter for tun. This could
be used for implementing efficient virtio-net receive filter for
vhost-net.
Changes from V2:
- fix typo
- remove unnecessary double check
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch allows userspace to attach eBPF filter to tun. This will
allow to implement VM dataplane filtering in a more efficient way
compared to cBPF filter by allowing either qemu or libvirt to
attach eBPF filter to tun.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
To be reused by other eBPF program other than queue selection.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull x86 fixes from Ingo Molnar:
"Misc fixes:
- A rather involved set of memory hardware encryption fixes to
support the early loading of microcode files via the initrd. These
are larger than what we normally take at such a late -rc stage, but
there are two mitigating factors: 1) much of the changes are
limited to the SME code itself 2) being able to early load
microcode has increased importance in the post-Meltdown/Spectre
era.
- An IRQ vector allocator fix
- An Intel RDT driver use-after-free fix
- An APIC driver bug fix/revert to make certain older systems boot
again
- A pkeys ABI fix
- TSC calibration fixes
- A kdump fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/apic/vector: Fix off by one in error path
x86/intel_rdt/cqm: Prevent use after free
x86/mm: Encrypt the initrd earlier for BSP microcode update
x86/mm: Prepare sme_encrypt_kernel() for PAGE aligned encryption
x86/mm: Centralize PMD flags in sme_encrypt_kernel()
x86/mm: Use a struct to reduce parameters for SME PGD mapping
x86/mm: Clean up register saving in the __enc_copy() assembly code
x86/idt: Mark IDT tables __initconst
Revert "x86/apic: Remove init_bsp_APIC()"
x86/mm/pkeys: Fix fill_sig_info_pkey
x86/tsc: Print tsc_khz, when it differs from cpu_khz
x86/tsc: Fix erroneous TSC rate on Skylake Xeon
x86/tsc: Future-proof native_calibrate_tsc()
kdump: Write the correct address of mem_section into vmcoreinfo
Pull scheduler fix from Ingo Molnar:
"A delayacct statistics correctness fix"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
delayacct: Account blkio completion on the correct task
