Neither of the current maintainers works for Imagination any more.
Removed both imgtec email addresses and added back mine for
occasional reviews, also changed from Maintained to Odd Fixes to
reflect the time that I will be able to spend on it.
Signed-off-by: James Hartley <james.hartley@sondrel.com>
Patchwork: https://patchwork.linux-mips.org/patch/17475/
Signed-off-by: James Hogan <jhogan@kernel.org>
When task_struct was moved, this MIPS code was neglected. Evidently
nobody is using it anymore. This fixes this build error:
In file included from ./arch/mips/include/asm/thread_info.h:15:0,
from ./include/linux/thread_info.h:37,
from ./include/asm-generic/current.h:4,
from ./arch/mips/include/generated/asm/current.h:1,
from ./include/linux/sched.h:11,
from arch/mips/kernel/smp-cmp.c:22:
arch/mips/kernel/smp-cmp.c: In function ‘cmp_boot_secondary’:
./arch/mips/include/asm/processor.h:384:41: error: implicit declaration
of function ‘task_stack_page’ [-Werror=implicit-function-declaration]
#define __KSTK_TOS(tsk) ((unsigned long)task_stack_page(tsk) + \
^
arch/mips/kernel/smp-cmp.c:84:21: note: in expansion of macro ‘__KSTK_TOS’
unsigned long sp = __KSTK_TOS(idle);
^~~~~~~~~~
Fixes: f3ac606719 ("sched/headers: Move task-stack related APIs from <linux/sched.h> to <linux/sched/task_stack.h>")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: <stable@vger.kernel.org> # 4.11+
Patchwork: https://patchwork.linux-mips.org/patch/17522/
Signed-off-by: James Hogan <jhogan@kernel.org>
Commit cc731525f2 ("signal: Remove kernel interal si_code magic")
added a check for SIGMET and NSIGEMT being defined. That SIGMET should
in fact be SIGEMT, with SIGEMT being defined in
arch/{alpha,mips,sparc}/include/uapi/asm/signal.h
This was actually pointed out by BenHutchings in a lwn.net comment
here https://lwn.net/Comments/734608/
Fixes: cc731525f2 ("signal: Remove kernel interal si_code magic")
Signed-off-by: Andrew Clayton <andrew@digital-domain.net>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Pull block fixes from Jens Axboe:
"A few fixes that should go into this series:
- Regression fix for ide-cd, ensuring that a request is fully
initialized. From Hongxu.
- Ditto fix for virtio_blk, from Bart.
- NVMe fix from Keith, ensuring that we set the right block size on
revalidation. If the block size changed, we'd be in trouble without
it.
- NVMe rdma fix from Sagi, fixing a potential hang while the
controller is being removed"
* 'for-linus' of git://git.kernel.dk/linux-block:
ide:ide-cd: fix kernel panic resulting from missing scsi_req_init
nvme: Fix setting logical block format when revalidating
virtio_blk: Fix an SG_IO regression
nvme-rdma: fix possible hang when issuing commands during ctrl removal
Commit 1ec9dd80be ("MIPS: CPS: Detect CPUs in secondary clusters")
added a check in cps_boot_secondary() that the secondary being booted is
in the same cluster as the CPU running this code. This check is
performed using current_cpu_data without disabling preemption. As such
when CONFIG_PREEMPT=y, a BUG is triggered:
[ 57.991693] BUG: using smp_processor_id() in preemptible [00000000] code: hotplug/1749
<snip>
[ 58.063077] Call Trace:
[ 58.065842] [<8040cdb4>] show_stack+0x84/0x114
[ 58.070830] [<80b11b38>] dump_stack+0xf8/0x140
[ 58.075796] [<8079b12c>] check_preemption_disabled+0xec/0x118
[ 58.082204] [<80415110>] cps_boot_secondary+0x84/0x44c
[ 58.087935] [<80413a14>] __cpu_up+0x34/0x98
[ 58.092624] [<80434240>] bringup_cpu+0x38/0x114
[ 58.097680] [<80434af0>] cpuhp_invoke_callback+0x168/0x8f0
[ 58.103801] [<804362d0>] _cpu_up+0x154/0x1c8
[ 58.108565] [<804363dc>] do_cpu_up+0x98/0xa8
[ 58.113333] [<808261f8>] device_online+0x84/0xc0
[ 58.118481] [<80826294>] online_store+0x60/0x98
[ 58.123562] [<8062261c>] kernfs_fop_write+0x158/0x1d4
[ 58.129196] [<805a2ae4>] __vfs_write+0x4c/0x168
[ 58.134247] [<805a2dc8>] vfs_write+0xe0/0x190
[ 58.139095] [<805a2fe0>] SyS_write+0x68/0xc4
[ 58.143854] [<80415d58>] syscall_common+0x34/0x58
In reality we don't currently support running the kernel on CPUs not in
cluster 0, so the answer to cpu_cluster(¤t_cpu_data) will always
be 0, even if this task being preempted and continues running on a
different CPU. Regardless, the BUG should not be triggered, so fix this
by switching to raw_current_cpu_data. When multicluster support lands
upstream this check will need removing or changing anyway.
Fixes: 1ec9dd80be ("MIPS: CPS: Detect CPUs in secondary clusters")
Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
Reviewed-by: Paul Burton <paul.burton@mips.com>
CC: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17563/
Signed-off-by: James Hogan <jhogan@kernel.org>
Jeremy reported a suspicious RCU usage warning in mcelog.
/dev/mcelog is called in process context now as part of the notifier
chain and doesn't need any of the fancy RCU and lockless accesses which
it did in atomic context.
Axe it all in favor of a simple mutex synchronization which cures the
problem reported.
Fixes: 5de97c9f6d ("x86/mce: Factor out and deprecate the /dev/mcelog driver")
Reported-by: Jeremy Cline <jcline@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-and-tested-by: Tony Luck <tony.luck@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: linux-edac@vger.kernel.org
Cc: Laura Abbott <labbott@redhat.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20171101164754.xzzmskl4ngrqc5br@pd.tnic
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1498969
Guenter reported:
There is still a problem. When running
echo 6 > /proc/sys/kernel/watchdog_thresh
echo 5 > /proc/sys/kernel/watchdog_thresh
repeatedly, the message
NMI watchdog: Enabled. Permanently consumes one hw-PMU counter.
stops after a while (after ~10-30 iterations, with fluctuations).
Maybe watchdog_cpus needs to be atomic ?
That's correct as this again is affected by the asynchronous nature of the
smpboot thread unpark mechanism.
CPU 0 CPU1 CPU2
write(watchdog_thresh, 6)
stop()
park()
update()
start()
unpark()
thread->unpark()
cnt++;
write(watchdog_thresh, 5) thread->unpark()
stop()
park() thread->park()
cnt--; cnt++;
update()
start()
unpark()
That's not a functional problem, it just affects the informational message.
Convert watchdog_cpus to atomic_t to prevent the problem
Reported-and-tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20171101181126.j727fqjmdthjz4xk@redhat.com
Guenter reported a crash in the watchdog/perf code, which is caused by
cleanup() and enable() running concurrently. The reason for this is:
The watchdog functions are serialized via the watchdog_mutex and cpu
hotplug locking, but the enable of the perf based watchdog happens in
context of the unpark callback of the smpboot thread. But that unpark
function is not synchronous inside the locking. The unparking of the thread
just wakes it up and leaves so there is no guarantee when the thread is
executing.
If it starts running _before_ the cleanup happened then it will create a
event and overwrite the dead event pointer. The new event is then cleaned
up because the event is marked dead.
lock(watchdog_mutex);
lockup_detector_reconfigure();
cpus_read_lock();
stop();
park()
update();
start();
unpark()
cpus_read_unlock(); thread runs()
overwrite dead event ptr
cleanup();
free new event, which is active inside perf....
unlock(watchdog_mutex);
The park side is safe as that actually waits for the thread to reach
parked state.
Commit a33d44843d removed the protection against this kind of scenario
under the stupid assumption that the hotplug serialization and the
watchdog_mutex cover everything.
Bring it back.
Reverts: a33d44843d ("watchdog/hardlockup/perf: Simplify deferred event destroy")
Reported-and-tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thomas Feels-stupid Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Don Zickus <dzickus@redhat.com>
Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1710312145190.1942@nanos
ARM depends on the macros '__ARMEL__' & '__ARMEB__' being defined
or not to correctly select or define endian-specific macros,
structures or pieces of code.
These macros are predefined by the compiler but sparse knows
nothing about them and thus may pre-process files differently
from what gcc would.
Fix this by passing '-D__ARMEL__' or '-D__ARMEB__' to sparse,
depending on the endianness of the kernel, like defined by GCC.
Note: In most case it won't change anything since most ARMs use
little-endian (but an allyesconfig would use big-endian!).
To: Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This is an extension of Commit 7c20d213dd ("drm/vmwgfx: Work
around mode set failure in 2D VMs")
With Wayland desktop and atomic mode set, during the mode setting
process there is a moment when two framebuffer sized surfaces
are being pinned. This was not an issue with Xorg.
Since this only happens during a mode change, there should be no
performance impact by increasing allowable mem_size.
Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Cc: stable@vger.kernel.org
vmw_fence_ops are not supposed to change at runtime. Functions
"dma_fence_init" working with const vmw_fence_ops provided
by <linux/dma-fence.h>. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
In case the object has changed tiling between calls to execbuf, we need
to check if the existing offset inside the GTT matches the new tiling
constraint. We even need to do this for "unfenced" tiled objects, where
the 3D commands use an implied fence and so the object still needs to
match the physical fence restrictions on alignment (only required for
gen2 and early gen3).
In commit 2889caa923 ("drm/i915: Eliminate lots of iterations over
the execobjects array"), the idea was to remove the second guessing and
only set the NEEDS_MAP flag when required. However, the entire check
for an unusable offset for fencing was removed and not just the
secondary check. I.e.
/* avoid costly ping-pong once a batch bo ended up non-mappable */
if (entry->flags & __EXEC_OBJECT_NEEDS_MAP &&
!i915_vma_is_map_and_fenceable(vma))
return !only_mappable_for_reloc(entry->flags);
was entirely removed as the ping-pong between execbuf passes was fixed,
but its primary purpose in forcing unaligned unfenced access to be
rebound was forgotten.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103502
Fixes: 2889caa923 ("drm/i915: Eliminate lots of iterations over the execobjects array")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171031103607.17836-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit 1d033beb20)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
A bunch of fixes here, mostly device specific ones (the biggest one
being the revert of the hotword support for rt5514), with a couple of
core fixes for potential issues with corrupted or otherwise invalid
topology files.
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Merge tag 'asoc-fix-v4.14-rc7' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v4.14
A bunch of fixes here, mostly device specific ones (the biggest one
being the revert of the hotword support for rt5514), with a couple of
core fixes for potential issues with corrupted or otherwise invalid
topology files.
Pull networking fixes from David Miller:
1) Fix refcounting in xfrm_bundle_lookup() when using a dummy bundle,
from Steffen Klassert.
2) Fix crypto header handling in rx data frames in ath10k driver, from
Vasanthakumar Thiagarajan.
3) Fix use after free of qdisc when we defer tcp_chain_flush() to a
workqueue. From Cong Wang.
4) Fix double free in lapbether driver, from Pan Bian.
5) Sanitize TUNSETSNDBUF values, from Craig Gallek.
6) Fix refcounting when addrconf_permanent_addr() calls
ipv6_del_addr(). From Eric Dumazet.
7) Fix MTU probing bug in TCP that goes back to 2007, from Eric
Dumazet.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
tcp: fix tcp_mtu_probe() vs highest_sack
ipv6: addrconf: increment ifp refcount before ipv6_del_addr()
tun/tap: sanitize TUNSETSNDBUF input
mlxsw: i2c: Fix buffer increment counter for write transaction
mlxsw: reg: Add high and low temperature thresholds
MAINTAINERS: Remove Yotam from mlxfw
MAINTAINERS: Update Yotam's E-mail
net: hns: set correct return value
net: lapbether: fix double free
bpf: remove SK_REDIRECT from UAPI
net: phy: marvell: Only configure RGMII delays when using RGMII
xfrm: Fix GSO for IPsec with GRE tunnel.
tc-testing: fix arg to ip command: -s -> -n
net_sched: remove tcf_block_put_deferred()
l2tp: hold tunnel in pppol2tp_connect()
Revert "ath10k: fix napi_poll budget overflow"
ath10k: rebuild crypto header in rx data frames
wcn36xx: Remove unnecessary rcu_read_unlock in wcn36xx_bss_info_changed
xfrm: Clear sk_dst_cache when applying per-socket policy.
xfrm: Fix xfrm_dst_cache memleak
Syzkaller with KASAN has reported a use-after-free of vma->vm_flags in
__do_page_fault() with the following reproducer:
mmap(&(0x7f0000000000/0xfff000)=nil, 0xfff000, 0x3, 0x32, 0xffffffffffffffff, 0x0)
mmap(&(0x7f0000011000/0x3000)=nil, 0x3000, 0x1, 0x32, 0xffffffffffffffff, 0x0)
r0 = userfaultfd(0x0)
ioctl$UFFDIO_API(r0, 0xc018aa3f, &(0x7f0000002000-0x18)={0xaa, 0x0, 0x0})
ioctl$UFFDIO_REGISTER(r0, 0xc020aa00, &(0x7f0000019000)={{&(0x7f0000012000/0x2000)=nil, 0x2000}, 0x1, 0x0})
r1 = gettid()
syz_open_dev$evdev(&(0x7f0000013000-0x12)="2f6465762f696e7075742f6576656e742300", 0x0, 0x0)
tkill(r1, 0x7)
The vma should be pinned by mmap_sem, but handle_userfault() might (in a
return to userspace scenario) release it and then acquire again, so when
we return to __do_page_fault() (with other result than VM_FAULT_RETRY),
the vma might be gone.
Specifically, per Andrea the scenario is
"A return to userland to repeat the page fault later with a
VM_FAULT_NOPAGE retval (potentially after handling any pending signal
during the return to userland). The return to userland is identified
whenever FAULT_FLAG_USER|FAULT_FLAG_KILLABLE are both set in
vmf->flags"
However, since commit a3c4fb7c9c ("x86/mm: Fix fault error path using
unsafe vma pointer") there is a vma_pkey() read of vma->vm_flags after
that point, which can thus become use-after-free. Fix this by moving
the read before calling handle_mm_fault().
Reported-by: syzbot <bot+6a5269ce759a7bb12754ed9622076dc93f65a1f6@syzkaller.appspotmail.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Suggested-by: Kirill A. Shutemov <kirill@shutemov.name>
Fixes: 3c4fb7c9c2e ("x86/mm: Fix fault error path using unsafe vma pointer")
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Merge tag 'smb3-file-name-too-long-fix' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fix from Steve French:
"smb3 file name too long fix"
* tag 'smb3-file-name-too-long-fix' of git://git.samba.org/sfrench/cifs-2.6:
cifs: check MaxPathNameComponentLength != 0 before using it
Since we split the scsi_request out of struct request, while the
standard prep_rq_fn builds 10 byte cmds, it missed to invoke
scsi_req_init() to initialize certain fields of a scsi_request
structure (.__cmd[], .cmd, .cmd_len and .sense_len but no other
members of struct scsi_request).
An example panic on virtual machines (qemu/virtualbox) to boot
from IDE cdrom:
...
[ 8.754381] Call Trace:
[ 8.755419] blk_peek_request+0x182/0x2e0
[ 8.755863] blk_fetch_request+0x1c/0x40
[ 8.756148] ? ktime_get+0x40/0xa0
[ 8.756385] do_ide_request+0x37d/0x660
[ 8.756704] ? cfq_group_service_tree_add+0x98/0xc0
[ 8.757011] ? cfq_service_tree_add+0x1e5/0x2c0
[ 8.757313] ? ktime_get+0x40/0xa0
[ 8.757544] __blk_run_queue+0x3d/0x60
[ 8.757837] queue_unplugged+0x2f/0xc0
[ 8.758088] blk_flush_plug_list+0x1f4/0x240
[ 8.758362] blk_finish_plug+0x2c/0x40
...
[ 8.770906] RIP: ide_cdrom_prep_fn+0x63/0x180 RSP: ffff92aec018bae8
[ 8.772329] ---[ end trace 6408481e551a85c9 ]---
...
Fixes: 82ed4db499 ("block: split scsi_request out of struct request")
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Just like the CTO timeout calculation introduced recently, the DTO
timeout calculation was incorrect. It used "bus_hz" but, as far as I
can tell, it's supposed to use the card clock. Let's account for the
div value, which is documented as 2x the value stored in the register,
or 1 if the register is 0.
NOTE: This was likely not terribly important until commit 16a34574c6
("mmc: dw_mmc: remove the quirks flags") landed because "DIV" is
documented on Rockchip SoCs (the ones that used to define the quirk)
to always be 0 or 1. ...and, in fact, it's documented to only be 1
with EMMC in 8-bit DDR52 mode. Thus before the quirk was applied to
everyone it was mostly OK to ignore the DIV value.
I haven't personally observed any problems that are fixed by this
patch but I also haven't tested this anywhere with a DIV other an 0.
AKA: this problem was found simply by code inspection and I have no
failing test cases that are fixed by it. Presumably this could fix
real bugs for someone out there, though.
Fixes: 16a34574c6 ("mmc: dw_mmc: remove the quirks flags")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Based on SNMP values provided by Roman, Yuchung made the observation
that some crashes in tcp_sacktag_walk() might be caused by MTU probing.
Looking at tcp_mtu_probe(), I found that when a new skb was placed
in front of the write queue, we were not updating tcp highest sack.
If one skb is freed because all its content was copied to the new skb
(for MTU probing), then tp->highest_sack could point to a now freed skb.
Bad things would then happen, including infinite loops.
This patch renames tcp_highest_sack_combine() and uses it
from tcp_mtu_probe() to fix the bug.
Note that I also removed one test against tp->sacked_out,
since we want to replace tp->highest_sack regardless of whatever
condition, since keeping a stale pointer to freed skb is a recipe
for disaster.
Fixes: a47e5a988a ("[TCP]: Convert highest_sack to sk_buff to allow direct access")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Reported-by: Roman Gushchin <guro@fb.com>
Reported-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
It fixes a problem for the last chunk where 'chunk_size' is smaller than
MLXSW_I2C_BLK_MAX and data is copied to the wrong offset, overriding
previous data.
Fixes: 6882b0aee1 ("mlxsw: Introduce support for I2C bus")
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
niph is not updated after pskb_expand_head changes the skb head. It
still points to the freed data, which is then used to update tot_len and
checksum. This could cause use-after-free poison crash.
Update niph, if ip_route_me_harder does not fail.
This only affects the interaction with REJECT targets and br_netfilter.
Signed-off-by: Tejaswi Tanikella <tejaswit@codeaurora.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Steffen Klassert says:
====================
pull request (net): ipsec 2017-11-01
1) Fix a memleak when a packet matches a policy
without a matching state.
2) Reset the socket cached dst_entry when inserting
a socket policy, otherwise the policy might be
ignored. From Jonathan Basseri.
3) Fix GSO for a IPsec, GRE tunnel combination.
We reset the encapsulation field at the skb
too erly, as a result GRE does not segment
GSO packets. Fix this by resetting the the
encapsulation field right before the
transformation where the inner headers get
invalid.
Please pull or let me know if there are problems.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Dmitry (through syzbot) reported being able to trigger the WARN in
get_pi_state() and a use-after-free on:
raw_spin_lock_irq(&pi_state->pi_mutex.wait_lock);
Both are due to this race:
exit_pi_state_list() put_pi_state()
lock(&curr->pi_lock)
while() {
pi_state = list_first_entry(head);
hb = hash_futex(&pi_state->key);
unlock(&curr->pi_lock);
dec_and_test(&pi_state->refcount);
lock(&hb->lock)
lock(&pi_state->pi_mutex.wait_lock) // uaf if pi_state free'd
lock(&curr->pi_lock);
....
unlock(&curr->pi_lock);
get_pi_state(); // WARN; refcount==0
The problem is we take the reference count too late, and don't allow it
being 0. Fix it by using inc_not_zero() and simply retrying the loop
when we fail to get a refcount. In that case put_pi_state() should
remove the entry from the list.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Gratian Crisan <gratian.crisan@ni.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: dvhart@infradead.org
Cc: syzbot <bot+2af19c9e1ffe4d4ee1d16c56ae7580feaee75765@syzkaller.appspotmail.com>
Cc: syzkaller-bugs@googlegroups.com
Cc: <stable@vger.kernel.org>
Fixes: c74aef2d06 ("futex: Fix pi_state->owner serialization")
Link: http://lkml.kernel.org/r/20171031101853.xpfh72y643kdfhjs@hirez.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This makes the changes introduced in commit 83e840c770
("powerpc64/elfv1: Only dereference function descriptor for non-text
symbols") to be specific to the kprobe subsystem.
We previously changed ppc_function_entry() to always check the provided
address to confirm if it needed to be dereferenced. This is actually
only an issue for kprobe blacklisted asm labels (through use of
_ASM_NOKPROBE_SYMBOL) and can cause other issues with ftrace. Also, the
additional checks are not really necessary for our other uses.
As such, move this check to the kprobes subsystem.
Fixes: 83e840c770 ("powerpc64/elfv1: Only dereference function descriptor for non-text symbols")
Cc: stable@vger.kernel.org # v4.13+
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This reverts commit 83e840c770 ("powerpc64/elfv1: Only dereference
function descriptor for non-text symbols").
Chandan reported that on newer kernels, trying to enable function_graph
tracer on ppc64 (BE) locks up the system with the following trace:
Unable to handle kernel paging request for data at address 0x600000002fa30010
Faulting instruction address: 0xc0000000001f1300
Thread overran stack, or stack corrupted
Oops: Kernel access of bad area, sig: 11 [#1]
BE SMP NR_CPUS=2048 DEBUG_PAGEALLOC NUMA pSeries
Modules linked in:
CPU: 1 PID: 6586 Comm: bash Not tainted 4.14.0-rc3-00162-g6e51f1f-dirty #20
task: c000000625c07200 task.stack: c000000625c07310
NIP: c0000000001f1300 LR: c000000000121cac CTR: c000000000061af8
REGS: c000000625c088c0 TRAP: 0380 Not tainted (4.14.0-rc3-00162-g6e51f1f-dirty)
MSR: 8000000000001032 <SF,ME,IR,DR,RI> CR: 28002848 XER: 00000000
CFAR: c0000000001f1320 SOFTE: 0
...
NIP [c0000000001f1300] .__is_insn_slot_addr+0x30/0x90
LR [c000000000121cac] .kernel_text_address+0x18c/0x1c0
Call Trace:
[c000000625c08b40] [c0000000001bd040] .is_module_text_address+0x20/0x40 (unreliable)
[c000000625c08bc0] [c000000000121cac] .kernel_text_address+0x18c/0x1c0
[c000000625c08c50] [c000000000061960] .prepare_ftrace_return+0x50/0x130
[c000000625c08cf0] [c000000000061b10] .ftrace_graph_caller+0x14/0x34
[c000000625c08d60] [c000000000121b40] .kernel_text_address+0x20/0x1c0
[c000000625c08df0] [c000000000061960] .prepare_ftrace_return+0x50/0x130
...
[c000000625c0ab30] [c000000000061960] .prepare_ftrace_return+0x50/0x130
[c000000625c0abd0] [c000000000061b10] .ftrace_graph_caller+0x14/0x34
[c000000625c0ac40] [c000000000121b40] .kernel_text_address+0x20/0x1c0
[c000000625c0acd0] [c000000000061960] .prepare_ftrace_return+0x50/0x130
[c000000625c0ad70] [c000000000061b10] .ftrace_graph_caller+0x14/0x34
[c000000625c0ade0] [c000000000121b40] .kernel_text_address+0x20/0x1c0
This is because ftrace is using ppc_function_entry() for obtaining the
address of return_to_handler() in prepare_ftrace_return(). The call to
kernel_text_address() itself gets traced and we end up in a recursive
loop.
Fixes: 83e840c770 ("powerpc64/elfv1: Only dereference function descriptor for non-text symbols")
Cc: stable@vger.kernel.org # v4.13+
Reported-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
The ASIC has the ability to generate events whenever a sensor indicates
the temperature goes above or below its high or low thresholds,
respectively.
In new firmware versions the firmware enforces a minimum of 5
degrees Celsius difference between both thresholds. Make the driver
conform to this requirement.
Note that this is required even when the events are disabled, as in
certain systems interrupts are generated via GPIO based on these
thresholds.
Fixes: 85926f8770 ("mlxsw: reg: Add definition of temperature management registers")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Provide a mailing list for maintenance of the module instead.
Signed-off-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
For the time being I will be available in my private mail. Update both the
MAINTAINERS file and the individual modules MODULE_AUTHOR directive with
the new address.
Signed-off-by: Yotam Gigi <yotam.gi@gmail.com>
Signed-off-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The function of_parse_phandle() returns a NULL pointer if it cannot
resolve a phandle property to a device_node pointer. In function
hns_nic_dev_probe(), its return value is passed to PTR_ERR to extract
the error code. However, in this case, the extracted error code will
always be zero, which is unexpected.
Signed-off-by: Pan Bian <bianpan2016@163.com>
Reviewed-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
The function netdev_priv() returns the private data of the device. The
memory to store the private data is allocated in alloc_netdev() and is
released in netdev_free(). Calling kfree() on the return value of
netdev_priv() after netdev_free() results in a double free bug.
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Now that SK_REDIRECT is no longer a valid return code. Remove it
from the UAPI completely. Then do a namespace remapping internal
to sockmap so SK_REDIRECT is no longer externally visible.
Patchs primary change is to do a namechange from SK_REDIRECT to
__SK_REDIRECT
Reported-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The fix 5987feb38a ("net: phy: marvell: logical vs bitwise OR typo")
uncovered another bug in the Marvell PHY driver, which broke the
Marvell OpenRD platform. It relies on the bootloader configuring the
RGMII delays and does not specify a phy-mode in its device tree. The
PHY driver should only configure RGMII delays if the phy mode
indicates it is using RGMII. Without anything in device tree, the
mv643xx Ethernet driver defaults to GMII.
Fixes: 5987feb38a ("net: phy: marvell: logical vs bitwise OR typo")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The most important here is the security vulnerabitility fix for
ath10k.
ath10k
* fix security vulnerability with missing PN check on certain hardware
* revert ath10k napi fix as it caused regressions on QCA6174
wcn36xx
* remove unnecessary rcu_read_unlock() from error path
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Merge tag 'wireless-drivers-for-davem-2017-10-31' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers
Kalle Valo says:
====================
wireless-drivers fixes for 4.14
The most important here is the security vulnerabitility fix for
ath10k.
ath10k
* fix security vulnerability with missing PN check on certain hardware
* revert ath10k napi fix as it caused regressions on QCA6174
wcn36xx
* remove unnecessary rcu_read_unlock() from error path
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 6f542ebeae ("MIPS: Fix race on setting and getting
cpu_online_mask") effectively reverted commit 8f46cca1e6 ("MIPS: SMP:
Fix possibility of deadlock when bringing CPUs online") and thus has
reinstated the possibility of deadlock.
The commit was based on testing of kernel v4.4, where the CPU hotplug
core code issued a BUG() if the starting CPU is not marked online when
the boot CPU returns from __cpu_up. The commit fixes this race (in
v4.4), but re-introduces the deadlock situation.
As noted in the commit message, upstream differs in this area. Commit
8df3e07e7f ("cpu/hotplug: Let upcoming cpu bring itself fully up")
adds a completion event in the CPU hotplug core code, making this race
impossible. However, people were unhappy with relying on the core code
to do the right thing.
To address the issues both commits were trying to fix, add a second
completion event in the MIPS smp hotplug path. It removes the
possibility of a race, since the MIPS smp hotplug code now synchronises
both the boot and secondary CPUs before they return to the hotplug core
code. It also addresses the deadlock by ensuring that the secondary CPU
is not marked online before it's counters are synchronised.
This fix should also be backported to fix the race condition introduced
by the backport of commit 8f46cca1e6 ("MIPS: SMP: Fix possibility of
deadlock when bringing CPUs online"), through really that race only
existed before commit 8df3e07e7f ("cpu/hotplug: Let upcoming cpu
bring itself fully up").
Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Fixes: 6f542ebeae ("MIPS: Fix race on setting and getting cpu_online_mask")
CC: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com>
Cc: <stable@vger.kernel.org> # v4.1+: 8f46cca1e6: "MIPS: SMP: Fix possibility of deadlock when bringing CPUs online"
Cc: <stable@vger.kernel.org> # v4.1+: a00eeede50: "MIPS: SMP: Use a completion event to signal CPU up"
Cc: <stable@vger.kernel.org> # v4.1+: 6f542ebeae: "MIPS: Fix race on setting and getting cpu_online_mask"
Cc: <stable@vger.kernel.org> # v4.1+
Patchwork: https://patchwork.linux-mips.org/patch/17376/
Signed-off-by: James Hogan <jhogan@kernel.org>
It seems that this is a typo error and the proper bit masking is
"RT | RS" instead of "RS | RS".
This issue was detected with the help of Coccinelle.
Fixes: d6b3314b49 ("MIPS: uasm: Add lh uam instruction")
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Reviewed-by: James Hogan <jhogan@kernel.org>
Cc: <stable@vger.kernel.org> # 3.16+
Patchwork: https://patchwork.linux-mips.org/patch/17551/
Signed-off-by: James Hogan <jhogan@kernel.org>
single nouveau regression fix.
* 'linux-4.14' of git://github.com/skeggsb/linux:
drm/nouveau/kms/nv50: use the correct state for base channel notifier setup
The default CM target field in the GCR_BASE register is encoded with 0
meaning memory & 1 being reserved. However the definitions we use for
those bits effectively get these two values backwards - likely because
they were copied from the definitions for the CM regions where the
target is encoded differently. This results in use setting up GCR_BASE
with the reserved target value by default, rather than targeting memory
as intended. Although we currently seem to get away with this it's not a
great idea to rely upon.
Fix this by changing our macros to match the documentated target values.
The incorrect encoding became used as of commit 9f98f3dd0c ("MIPS: Add
generic CM probe & access code") in the Linux v3.15 cycle, and was
likely carried forwards from older but unused code introduced by
commit 39b8d52542 ("[MIPS] Add support for MIPS CMP platform.") in the
v2.6.26 cycle.
Fixes: 9f98f3dd0c ("MIPS: Add generic CM probe & access code")
Signed-off-by: Paul Burton <paul.burton@mips.com>
Reported-by: Matt Redfearn <matt.redfearn@mips.com>
Reviewed-by: James Hogan <jhogan@kernel.org>
Cc: Matt Redfearn <matt.redfearn@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # v3.15+
Patchwork: https://patchwork.linux-mips.org/patch/17562/
Signed-off-by: James Hogan <jhogan@kernel.org>
Commit e83f7e02af ("MIPS: CPS: Have asm/mips-cps.h include CM & CPC
headers") adds a #error to arch/mips/include/asm/mips-cpc.h if it is
included directly. While this commit replaced almost all direct includes
of mips-cm.h and mips-cpc.h, 2 remain.
With some defconfigs, mips-cps.h is indirectly included before
mips-cpc.h, but in others this results in compilation errors:
In file included from arch/mips/generic/init.c:23:0:
./arch/mips/include/asm/mips-cpc.h:12:3: error: #error Please include
asm/mips-cps.h rather than asm/mips-cpc.h
# error Please include asm/mips-cps.h rather than asm/mips-cpc.h
In file included from arch/mips/kernel/smp.c:23:0:
./arch/mips/include/asm/mips-cpc.h:12:3: error: #error Please include
asm/mips-cps.h rather than asm/mips-cpc.h
# error Please include asm/mips-cps.h rather than asm/mips-cpc.h
In both cases, fix this by including mips-cps.h instead.
Fixes: e83f7e02af ("MIPS: CPS: Have asm/mips-cps.h include CM & CPC headers")
Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/17492/
Signed-off-by: James Hogan <jhogan@kernel.org>
Commit 9fef686863 ("MIPS: Make SAVE_SOME more standard") made several
changes to the order in which registers are saved in the SAVE_SOME
macro, used by exception handlers to save the processor state. In
particular, it removed the
move k1, sp
in the delay slot of the branch testing if the processor is already in
kernel mode. This is replaced later in the macro by a
move k0, sp
When CONFIG_EVA is disabled, this instruction actually appears in the
delay slot of the branch. However, when CONFIG_EVA is enabled, instead
the RPS workaround of
MFC0 k0, CP0_ENTRYHI
appears in the delay slot. This results in k0 not containing the stack
pointer, but some unrelated value, which is then saved to the kernel
stack. On exit from the exception, this bogus value is restored to the
stack pointer, resulting in an OOPS.
Fix this by moving the save of SP in k0 explicitly in the delay slot of
the branch, outside of the CONFIG_EVA section, restoring the expected
instruction ordering when CONFIG_EVA is active.
Fixes: 9fef686863 ("MIPS: Make SAVE_SOME more standard")
Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
Reported-by: Vladimir Kondratiev <vladimir.kondratiev@intel.com>
Reviewed-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: James Hogan <jhogan@kernel.org>
Patchwork: https://patchwork.linux-mips.org/patch/17471/
Signed-off-by: James Hogan <jhogan@kernel.org>
Since commit 04a85e087a ("MIPS: generic: Move NI 169445 FIT image
source to its own file"), a generic 32r2el_defconfig kernel fails to
build with the following build error:
ITB arch/mips/boot/vmlinux.gz.itb
Error: arch/mips/boot/vmlinux.gz.its:111.1-2 syntax error
FATAL ERROR: Unable to parse input tree
mkimage Can't read arch/mips/boot/vmlinux.gz.itb.tmp: Invalid argument
Fix arch/mips/generic/board-ni169445.its.S to include the necessary "/"
node path before the first open brace.
The original issue in arch/mips/generic/vmlinux.its.S was fixed directly
in the original commit 7aacf86b75 ("MIPS: NI 169445 board support")
after https://patchwork.linux-mips.org/patch/16941/ was submitted, but
the separate its.S file wasn't correctly fixed when resolving the
conflict in commit 04a85e087a ("MIPS: generic: Move NI 169445 FIT
image source to its own file").
Fixes: 04a85e087a ("MIPS: generic: Move NI 169445 FIT image source to its own file")
Signed-off-by: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Nathan Sullivan <nathan.sullivan@ni.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17561/
Signed-off-by: James Hogan <jhogan@kernel.org>
This reverts two recent PM QoS commits one of which
introduced multiple problems and the other one fixed
some, but not all of them (Rafael Wysocki).
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Merge tag 'pm-reverts-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management commit reverts from Rafael Wysocki:
"Since Geert reports additional problems with my PM QoS fix from the
last week that have not been addressed by the most recent fixup on top
of it, they both should better be reverted now and let's fix the
original issue properly in 4.15.
This reverts two recent PM QoS commits one of which introduced
multiple problems and the other one fixed some, but not all of them
(Rafael Wysocki)"
* tag 'pm-reverts-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "PM / QoS: Fix device resume latency PM QoS"
Revert "PM / QoS: Fix default runtime_pm device resume latency"
MIPS will soon not be a part of Imagination Technologies, and as such
many @imgtec.com email addresses will no longer be valid. This patch
updates the addresses for those who:
- Have 10 or more patches in mainline authored using an @imgtec.com
email address, or any patches dated within the past year.
- Are still with Imagination but leaving as part of the MIPS business
unit, as determined from an internal email address list.
- Haven't already updated their email address (ie. JamesH) or expressed
a desire to be excluded (ie. Maciej).
- Acked v2 or earlier of this patch, which leaves Deng-Cheng, Matt &
myself.
New addresses are of the form firstname.lastname@mips.com, and all
verified against an internal email address list. An entry is added to
.mailmap for each person such that get_maintainer.pl will report the new
addresses rather than @imgtec.com addresses which will soon be dead.
Instances of the affected addresses throughout the tree are then
mechanically replaced with the new @mips.com address.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com>
Cc: Deng-Cheng Zhu <dengcheng.zhu@mips.com>
Acked-by: Dengcheng Zhu <dengcheng.zhu@mips.com>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Matt Redfearn <matt.redfearn@mips.com>
Acked-by: Matt Redfearn <matt.redfearn@mips.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: trivial@kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17540/
Signed-off-by: James Hogan <jhogan@kernel.org>
