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Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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This is an all-on-one change to align the state of the patch with what
has been submit upstream. This includes the following patches:
[PATCH 1/2] mm/compaction: Really limit compact_unevictable_allowed to 0…1
[PATCH 2/2 v5] mm/compaction: Disable compact_unevictable_allowed on RT
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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The warning was introduced to find callers of complete_all() having
multiple waiters enqueued. As completa_all() wakes all waiters with
disabled interrupts it may lead visibile latency spikes with a larger
amount of waiters.
Since the warning was introduced, most of the feedback was in the
"setup/configure" phase which is nothing that would disturb the RT
workload because it is not yet active.
There were reports regarding the crypto code which may wake multiple
waiters if all of them request an algorithm which requires a module to
be loaded first. If this really become a problem during runtime it
should be investigated then.
Remove the warning if more than two waiters are worken up via the
complete_all() interface.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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The 32bit powerpc assembler implementation of the lazy preemption
set the _TIF_PERSYSCALL_MASK on the low word. This could lead to
modprobe segfaults and a kernel panic - not syncing: Attempt to
kill init! issue.
Fixed by shifting the mask by 16 bit using andis and lis.
Signed-off-by: Thomas Graziadei <thomas.graziadei@omicronenergy.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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The drain_local_pages_wq() uses preempt_disable() to ensure that there
will be no CPU migration while drain_local_pages() is invoked which
might happen if the CPU is going down.
drain_local_pages() acquires a sleeping lock on RT which can not be
acquired with disabled preemption.
Use migrate_disable() instead of preempt_disable(): On RT it ensures
that the CPU won't go down and on !RT it is replaced with
preempt_disable().
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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In the v5.4-RT cycle the local-lock based locking for struct pagevec was
replaced with explicit per-CPU locking of the struct pagevec. This
explicit locking was used if NO_HZ_FULL was active and if was always
used on -RT.
Upstream wasn't too excited about this so we will probably stick with
the local-lock based "fix" to deal with the required locking.
This is an all-in-one change containing
- a revert of the following patches:
0001-mm-page_alloc-Split-drain_local_pages.patch
0002-mm-swap-Add-static-key-dependent-pagevec-locking.patch
0003-mm-swap-Access-struct-pagevec-remotely.patch
0004-mm-swap-Enable-use_pvec_lock-nohz_full-dependent.patch
mm-swap-Enable-use-pvec-lock-on-RT.patch
- adding back the old patches:
mm-convert-swap-to-percpu-locked.patch
mm-perform-lru_add_drain_all-remotely.patch
Since the v5.4 series will be maintained for a bit longer I don't want
to divert the trees more than they have to and so this brings the old
behaviour we had in v5.2-RT and earlier.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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This is the 5.4.42 stable release
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
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This is the 5.4.41 stable release
# gpg: Signature made Thu 14 May 2020 01:58:30 AM EDT
# gpg: using RSA key 647F28654894E3BD457199BE38DBBDC86092693E
# gpg: Can't check signature: No public key
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The linux-5.4.y commit 8781011a302b ("bpf: Test_progs, add test to catch
retval refine error handling") fails to build when libbpf headers are
not installed, as it tries to include <bpf/bpf_helpers.h>:
progs/test_get_stack_rawtp_err.c:4:10:
fatal error: 'bpf/bpf_helpers.h' file not found
For 5.4-stable (only) the new test prog needs to include "bpf_helpers.h"
instead (like all the rest of progs/*.c do) because 5.4-stable does not
carry commit e01a75c15969 ("libbpf: Move bpf_{helpers, helper_defs,
endian, tracing}.h into libbpf").
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Fixes: 8781011a302b ("bpf: Test_progs, add test to catch retval refine error handling")
Cc: <stable@vger.kernel.org> # v5.4
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Fix up RET_IF as CHECK macro to make selftests compile again.
Fixes: b911c5e8686a ("selftests: bpf: Reset global state between reuseport test runs")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 6803ee25f0ead1e836808acb14396bb9a9849113 upstream.
This logic is re-used for parsing a set of online CPUs. Having it as an
isolated piece of code working with input string makes it conveninent to test
this logic as well. While refactoring, also improve the robustness of original
implementation.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191212013548.1690564-1-andriin@fb.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit b1112139a103b4b1101d0d2d72931f2d33d8c978 upstream.
gcc-10 will rename --param=allow-store-data-races=0
to -fno-allow-store-data-races.
The flag change happened at https://gcc.gnu.org/PR92046.
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Cc: Thomas Backlund <tmb@mageia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit c4e0e4ab4cf3ec2b3f0b628ead108d677644ebd9 upstream.
Bank_num is a one-based count of banks, not a zero-based index. It
overflows the allocated space only when strictly greater than
KVM_MAX_MCE_BANKS.
Fixes: a9e38c3e01ad ("KVM: x86: Catch potential overrun in MCE setup")
Signed-off-by: Jue Wang <juew@google.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Message-Id: <20200511225616.19557-1-jmattson@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 18f02ad19e2c2a1d9e1d55a4e1c0cbf51419151c upstream.
tcp_bpf_recvmsg() invokes sk_psock_get(), which returns a reference of
the specified sk_psock object to "psock" with increased refcnt.
When tcp_bpf_recvmsg() returns, local variable "psock" becomes invalid,
so the refcount should be decreased to keep refcount balanced.
The reference counting issue happens in several exception handling paths
of tcp_bpf_recvmsg(). When those error scenarios occur such as "flags"
includes MSG_ERRQUEUE, the function forgets to decrease the refcnt
increased by sk_psock_get(), causing a refcnt leak.
Fix this issue by calling sk_psock_put() or pulling up the error queue
read handling when those error scenarios occur.
Fixes: e7a5f1f1cd000 ("bpf/sockmap: Read psock ingress_msg before sk_receive_queue")
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/1587872115-42805-1-git-send-email-xiyuyang19@fudan.edu.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 0a8e7b7d08466b5fc52f8e96070acc116d82a8bb upstream.
I've noticed that when krb5i or krb5p security is in use,
retransmitted requests are missing the server's duplicate reply
cache. The computed checksum on the retransmitted request does not
match the cached checksum, resulting in the server performing the
retransmitted request again instead of returning the cached reply.
The assumptions made when removing xdr_buf_trim() were not correct.
In the send paths, the upper layer has already set the segment
lengths correctly, and shorting the buffer's content is simply a
matter of reducing buf->len.
xdr_buf_trim() is the right answer in the receive/unwrap path on
both the client and the server. The buffer segment lengths have to
be shortened one-by-one.
On the server side in particular, head.iov_len needs to be updated
correctly to enable nfsd_cache_csum() to work correctly. The simple
buf->len computation doesn't do that, and that results in
checksumming stale data in the buffer.
The problem isn't noticed until there's significant instability of
the RPC transport. At that point, the reliability of retransmit
detection on the server becomes crucial.
Fixes: 241b1f419f0e ("SUNRPC: Remove xdr_buf_trim()")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e47cb97f153193d4b41ca8d48127da14513d54c7 upstream.
The Clock Pulse Generator (CPG) device node lacks the extal2 clock.
This may lead to a failure registering the "r" clock, or to a wrong
parent for the "usb24s" clock, depending on MD_CK2 pin configuration and
boot loader CPG_USBCKCR register configuration.
This went unnoticed, as this does not affect the single upstream board
configuration, which relies on the first clock input only.
Fixes: d9ffd583bf345e2e ("ARM: shmobile: r8a7740: add SoC clocks to DTS")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20200508095918.6061-1-geert+renesas@glider.be
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f4d71c6ea9e58c07dd4d02d09c5dd9bb780ec4b1 upstream.
Missing the renesas,ipmmu-main property on ipmmu_vip[01] nodes.
Fixes: 55697cbb44e4 ("arm64: dts: renesas: r8a779{65,80,90}: Add IPMMU devices nodes)
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/1587108543-23786-1-git-send-email-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 0f739fdfe9e5ce668bd6d3210f310df282321837 upstream.
The R-Mobile APE6 Compare Match Timer 1 generates 8 interrupts, one for
each channel, but currently only 1 is described.
Fix this by adding the missing interrupts.
Fixes: f7b65230019b9dac ("ARM: shmobile: r8a73a4: Add CMT1 node")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200408090926.25201-1-geert+renesas@glider.be
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 15ddc3e17aec0de4c69d595b873e184432b9791d upstream.
Using SDMA1 with UART1 is causing a "Timeout waiting for CH0" error.
This patch changes to ahb clock from SDMA1_ROOT to AHB which fixes the
timeout error.
Fixes: 6c3debcbae47 ("arm64: dts: freescale: Add i.MX8MN dtsi support")
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 190c7f6fd43a776d4a6da1dac44408104649e9b7 upstream.
The device tree compiler complains that the dwc3 nodes have regs
properties but no matching unit addresses.
Add the unit addresses to the device node name. While at it, also rename
the nodes from "dwc3" to "usb", as guidelines require device nodes have
generic names.
Fixes: 7144224f2c2b ("arm64: dts: rockchip: support dwc3 USB for rk3399")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20200327030414.5903-7-wens@kernel.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 83b994129fb4c18a8460fd395864a28740e5e7fb upstream.
In some board device tree files, "rk805" was used for the RK805 PMIC's
node name. However the policy for device trees is that generic names
should be used.
Replace the "rk805" node name with the generic "pmic" name.
Fixes: 1e28037ec88e ("arm64: dts: rockchip: add rk805 node for rk3328-evb")
Fixes: 955bebde057e ("arm64: dts: rockchip: add rk3328-rock64 board")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20200327030414.5903-3-wens@kernel.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e4f634d812634067b0c661af2e3cecfd629c89b8 upstream.
Use the correct dwc2 clock name.
Fixes: 9baf7d6be730 ("arm64: dts: meson: g12a: Add G12A USB nodes")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20200326160857.11929-3-narmstrong@baylibre.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 5ac0869fb39b1c1ba84d4d75c550f82e0bf44c96 upstream.
In the process of moving the VIM3 audio nodes to a G12B specific dtsi
for enabling the SM1 based VIM3L, the frddr_a status = "okay" property
got dropped.
This re-enables the frddr_a node to fix audio support.
Fixes: 4f26cc1c96c9 ("arm64: dts: khadas-vim3: move common nodes into meson-khadas-vim3.dtsi")
Reported-by: Christian Hewitt <christianshewitt@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Tested-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20191018140216.4257-1-narmstrong@baylibre.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 018d4671b9bbd4a5c55cf6eab3e1dbc70a50b66e upstream.
On failing to prepare or enable a clock, remove the core structure
from the list it has been inserted as it is about to be freed.
This otherwise leads to random crashes when subsequent clocks get
registered, during which parsing of the clock tree becomes adventurous.
Observed with QEMU's RPi-3 emulation.
Fixes: 12ead77432f2 ("clk: Don't try to enable critical clocks if prepare failed")
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Michael Turquette <mturquette@baylibre.com>
Link: https://lkml.kernel.org/r/20200505140953.409430-1-maz@kernel.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f41224efcf8aafe80ea47ac870c5e32f3209ffc8 upstream.
This reverts commit 3b36b13d5e69d6f51ff1c55d1b404a74646c9757.
Enable power save node breaks some systems with ACL225. Revert the patch
and use a platform specific quirk for the original issue isntead.
Fixes: 3b36b13d5e69 ("ALSA: hda/realtek: Fix pop noise on ALC225")
BugLink: https://bugs.launchpad.net/bugs/1875916
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20200503152449.22761-1-kai.heng.feng@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e8f7f9e3499a6d96f7f63a4818dc7d0f45a7783b upstream.
If 'usb_otg_descriptor_alloc()' fails, we must return a
negative error code -ENOMEM, not 0.
Fixes: ab6796ae9833 ("usb: gadget: cdc2: allocate and init otg descriptor by otg capabilities")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e27d4b30b71c66986196d8a1eb93cba9f602904a upstream.
If 'usb_otg_descriptor_alloc()' fails, we must return a
negative error code -ENOMEM, not 0.
Fixes: 1156e91dd7cc ("usb: gadget: ncm: allocate and init otg descriptor by otg capabilities")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 19b94c1f9c9a16d41a8de3ccbdb8536cf1aecdbf upstream.
If 'usb_otg_descriptor_alloc()' fails, we must return an error code, not 0.
Fixes: 56023ce0fd70 ("usb: gadget: audio: allocate and init otg descriptor by otg capabilities")
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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'net2272_plat_probe()'
commit ccaef7e6e354fb65758eaddd3eae8065a8b3e295 upstream.
'dev' is allocated in 'net2272_probe_init()'. It must be freed in the error
handling path, as already done in the remove function (i.e.
'net2272_plat_remove()')
Fixes: 90fccb529d24 ("usb: gadget: Gadget directory cleanup - group UDC drivers")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 55bf882c7f13dda8bbe624040c6d5b4fbb812d16 upstream.
Change the logic of FAN_ONDIR in two ways that are similar to the logic
of FAN_EVENT_ON_CHILD, that was fixed in commit 54a307ba8d3c ("fanotify:
fix logic of events on child"):
1. The flag is meaningless in ignore mask
2. The flag refers only to events in the mask of the mark where it is set
This is what the fanotify_mark.2 man page says about FAN_ONDIR:
"Without this flag, only events for files are created." It doesn't
say anything about setting this flag in ignore mask to stop getting
events on directories nor can I think of any setup where this capability
would be useful.
Currently, when marks masks are merged, the FAN_ONDIR flag set in one
mark affects the events that are set in another mark's mask and this
behavior causes unexpected results. For example, a user adds a mark on a
directory with mask FAN_ATTRIB | FAN_ONDIR and a mount mark with mask
FAN_OPEN (without FAN_ONDIR). An opendir() of that directory (which is
inside that mount) generates a FAN_OPEN event even though neither of the
marks requested to get open events on directories.
Link: https://lore.kernel.org/r/20200319151022.31456-10-amir73il@gmail.com
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Rachel Sibley <rasibley@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 00e21763f2c8cab21b7befa52996d1b18bde5c42 upstream.
The check for the HWO flag in dwc3_gadget_ep_reclaim_trb_sg()
causes us to break out of the loop before we call
dwc3_gadget_ep_reclaim_completed_trb(), which is what likely
should be clearing the HWO flag.
This can cause odd behavior where we never reclaim all the trbs
in the sg list, so we never call giveback on a usb req, and that
will causes transfer stalls.
This effectively resovles the adb stalls seen on HiKey960
after userland changes started only using AIO in adbd.
Cc: YongQin Liu <yongqin.liu@linaro.org>
Cc: Anurag Kumar Vulisha <anurag.kumar.vulisha@xilinx.com>
Cc: Yang Fei <fei.yang@intel.com>
Cc: Thinh Nguyen <thinhn@synopsys.com>
Cc: Tejas Joglekar <tejas.joglekar@synopsys.com>
Cc: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Cc: Jack Pham <jackp@codeaurora.org>
Cc: Josh Gao <jmgao@google.com>
Cc: Todd Kjos <tkjos@google.com>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Cc: stable@vger.kernel.org #4.20+
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit cec9d101d70a3509da9bd2e601e0b242154ce616 upstream.
The following changes prevent the unrecoverable freezes and rcu_sched
stall warnings experienced in each of my attempts to take advantage of
lima.
Replace the COMPOSITE_NOGATE definition of aclk_gpu_pre with a
COMPOSITE that retains the selection of HDMIPHY as the PLL source, but
instead makes uses of the aclk_gpu PLL source gate and parent names
defined by mux_pll_src_4plls_p rather than mux_aclk_gpu_pre_p.
Remove the now unused mux_aclk_gpu_pre_p and the four named but also
unused definitions (cpll_gpu, gpll_gpu, hdmiphy_gpu and usb480m_gpu)
of the aclk_gpu PLL source gate.
Use the correct gate offset for aclk_gpu and aclk_gpu_noc.
Fixes: 307a2e9ac524 ("clk: rockchip: add clock controller for rk3228")
Cc: stable@vger.kernel.org
Signed-off-by: Justin Swartz <justin.swartz@risingedge.co.za>
[double-checked against SoC manual and added fixes tag]
Link: https://lore.kernel.org/r/20200114162503.7548-1-justin.swartz@risingedge.co.za
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f87d1c9559164294040e58f5e3b74a162bf7c6e8 upstream.
I goofed when I added mm->user_ns support to would_dump. I missed the
fact that in the case of binfmt_loader, binfmt_em86, binfmt_misc, and
binfmt_script bprm->file is reassigned. Which made the move of
would_dump from setup_new_exec to __do_execve_file before exec_binprm
incorrect as it can result in would_dump running on the script instead
of the interpreter of the script.
The net result is that the code stopped making unreadable interpreters
undumpable. Which allows them to be ptraced and written to disk
without special permissions. Oops.
The move was necessary because the call in set_new_exec was after
bprm->mm was no longer valid.
To correct this mistake move the misplaced would_dump from
__do_execve_file into flos_old_exec, before exec_mmap is called.
I tested and confirmed that without this fix I can attach with gdb to
a script with an unreadable interpreter, and with this fix I can not.
Cc: stable@vger.kernel.org
Fixes: f84df2a6f268 ("exec: Ensure mm->user_ns contains the execed files")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 71c95825289f585014fe9741b051d32a7a916680 upstream.
The unwind_state 'error' field is used to inform the reliable unwinding
code that the stack trace can't be trusted. Set this field for all
errors in __unwind_start().
Also, move the zeroing out of the unwind_state struct to before the ORC
table initialization check, to prevent the caller from reading
uninitialized data if the ORC table is corrupted.
Fixes: af085d9084b4 ("stacktrace/x86: add function for detecting reliable stack traces")
Fixes: d3a09104018c ("x86/unwinder/orc: Dont bail on stack overflow")
Fixes: 98d0c8ebf77e ("x86/unwind/orc: Prevent unwinding before ORC initialization")
Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/d6ac7215a84ca92b895fdd2e1aa546729417e6e6.1589487277.git.jpoimboe@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a9a3ed1eff3601b63aea4fb462d8b3b92c7c1e7e upstream.
... or the odyssey of trying to disable the stack protector for the
function which generates the stack canary value.
The whole story started with Sergei reporting a boot crash with a kernel
built with gcc-10:
Kernel panic — not syncing: stack-protector: Kernel stack is corrupted in: start_secondary
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc5—00235—gfffb08b37df9 #139
Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./H77M—D3H, BIOS F12 11/14/2013
Call Trace:
dump_stack
panic
? start_secondary
__stack_chk_fail
start_secondary
secondary_startup_64
-—-[ end Kernel panic — not syncing: stack—protector: Kernel stack is corrupted in: start_secondary
This happens because gcc-10 tail-call optimizes the last function call
in start_secondary() - cpu_startup_entry() - and thus emits a stack
canary check which fails because the canary value changes after the
boot_init_stack_canary() call.
To fix that, the initial attempt was to mark the one function which
generates the stack canary with:
__attribute__((optimize("-fno-stack-protector"))) ... start_secondary(void *unused)
however, using the optimize attribute doesn't work cumulatively
as the attribute does not add to but rather replaces previously
supplied optimization options - roughly all -fxxx options.
The key one among them being -fno-omit-frame-pointer and thus leading to
not present frame pointer - frame pointer which the kernel needs.
The next attempt to prevent compilers from tail-call optimizing
the last function call cpu_startup_entry(), shy of carving out
start_secondary() into a separate compilation unit and building it with
-fno-stack-protector, was to add an empty asm("").
This current solution was short and sweet, and reportedly, is supported
by both compilers but we didn't get very far this time: future (LTO?)
optimization passes could potentially eliminate this, which leads us
to the third attempt: having an actual memory barrier there which the
compiler cannot ignore or move around etc.
That should hold for a long time, but hey we said that about the other
two solutions too so...
Reported-by: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Kalle Valo <kvalo@codeaurora.org>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200314164451.346497-1-slyfox@gentoo.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a48137996063d22ffba77e077425f49873856ca5 upstream.
Failed async writes that are requeued may not clean up a refcount
on the file, which can result in a leaked open. This scenario arises
very reliably when using persistent handles and a reconnect occurs
while writing.
cifs_writev_requeue only releases the reference if the write fails
(rc != 0). The server->ops->async_writev operation will take its own
reference, so the initial reference can always be released.
Signed-off-by: Adam McCoy <adam@forsedomani.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 4833ce06e6855d526234618b746ffb71d6612c9a upstream.
gpr2 is not a parametre of kuap_check(), it doesn't exist.
Use gpr instead.
Fixes: a68c31fc01ef ("powerpc/32s: Implement Kernel Userspace Access Protection")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/ea599546f2a7771bde551393889e44e6b2632332.1587368807.git.christophe.leroy@c-s.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 626bf90fe03fa080d8df06bb0397c95c53ae8e27 upstream.
This patch adds a basic cursor check when an atomic test-only commit is
performed. The position and size of the cursor plane is checked.
This should fix user-space relying on atomic checks to assign buffers to
planes.
Signed-off-by: Simon Ser <contact@emersion.fr>
Reported-by: Roman Gilg <subdiff@gmail.com>
References: https://github.com/emersion/libliftoff/issues/46
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Harry Wentland <hwentlan@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit cbe63a8358310244e6007398bd2c7c70c7fd51cd upstream.
The Y Soft yapp4 platform supports up to two Ethernet ports.
The Ursa board though has only one Ethernet port populated and that is
the port@2. Since the introduction of this platform into mainline a wrong
port was deleted and the Ethernet could never work. Fix this by deleting
the correct port node.
Fixes: 87489ec3a77f ("ARM: dts: imx: Add Y Soft IOTA Draco, Hydra and Ursa boards")
Cc: stable@vger.kernel.org
Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 0caf34350a25907515d929a9c77b9b206aac6d1e upstream.
The I2C2 pins are already used and the following errors are seen:
imx27-pinctrl 10015000.iomuxc: pin MX27_PAD_I2C2_SDA already requested by 10012000.i2c; cannot claim for 1001d000.i2c
imx27-pinctrl 10015000.iomuxc: pin-69 (1001d000.i2c) status -22
imx27-pinctrl 10015000.iomuxc: could not request pin 69 (MX27_PAD_I2C2_SDA) from group i2c2grp on device 10015000.iomuxc
imx-i2c 1001d000.i2c: Error applying setting, reverse things back
imx-i2c: probe of 1001d000.i2c failed with error -22
Fix it by adding the correct I2C1 IOMUX entries for the pinctrl_i2c1 group.
Cc: <stable@vger.kernel.org>
Fixes: 61664d0b432a ("ARM: dts: imx27 phyCARD-S pinctrl")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Steven Rostedt (VMware)
Sebastian Andrzej Siewior
Thomas Graziadei
Bruce Ashfield
Greg Kroah-Hartman
Kamal Mostafa
Andrii Nakryiko
Sergei Trofimovich
Jim Mattson
Xiyu Yang
Chuck Lever
Geert Uytterhoeven
Yoshihiro Shimoda
Adam Ford
Chen-Yu Tsai
Neil Armstrong
Marc Zyngier
Kai-Heng Feng
Wei Yongjun
Christophe JAILLET
Amir Goldstein
John Stultz
Justin Swartz
Eric W. Biederman
Josh Poimboeuf
Borislav Petkov
Adam McCoy
Christophe Leroy
Simon Ser
Michal Vokáč
Fabio Estevam