On Skylake hardware, the link_poll isn't clearing the pending interrupt
bit. Adding a new function for SKX that handles clearing of status bit the
right way.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Fixes: 783dfa6c ("ntb: Adding Skylake Xeon NTB support")
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Fix typo causing ntb_transport_create_queue to select the first
queue every time, instead of using the next free queue.
Signed-off-by: Thomas VanSelus <tvanselus@xes-inc.com>
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Fixes: fce8a7bb5 ("PCI-Express Non-Transparent Bridge Support")
Signed-off-by: Jon Mason <jdmason@kudzu.us>
In the normal I/O execution path, ntb_perf is missing a call to
dmaengine_unmap_put() after submission. That causes us to leak
unmap objects.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Fixes: 8a7b6a77 ("ntb: ntb perf tool")
Signed-off-by: Jon Mason <jdmason@kudzu.us>
The call to debugfs_remove_recursive(qp->debugfs_dir) of the sub-level
directory must not be later than
debugfs_remove_recursive(nt_debugfs_dir) of the top-level directory.
Otherwise, the sub-level directory will not exist, and it would be
invalid (panic) to attempt to remove it. This removes the top-level
directory last, after sub-level directories have been cleaned up.
Signed-off-by: Allen Hubbe <Allen.Hubbe@dell.com>
Fixes: e26a5843f ("NTB: Split ntb_hw_intel and ntb_transport drivers")
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Pull x86 fixes from Ingo Molnar:
"Last minute x86 fixes:
- Fix a softlockup detector warning and long delays if using ptdump
with KASAN enabled.
- Two more TSC-adjust fixes for interesting firmware interactions.
- Two commits to fix an AMD CPU topology enumeration bug that caused
a measurable gaming performance regression"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm/ptdump: Fix soft lockup in page table walker
x86/tsc: Make the TSC ADJUST sanitizing work for tsc_reliable
x86/tsc: Avoid the large time jump when sanitizing TSC ADJUST
x86/CPU/AMD: Fix Zen SMT topology
x86/CPU/AMD: Bring back Compute Unit ID
Pull timer fix from Ingo Molnar:
"Fix a sporadic missed timer hw reprogramming bug that can result in
random delays"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tick/nohz: Fix possible missing clock reprog after tick soft restart
Pull irq fixes from Ingo Molnar:
"Two last minute ARM irqchip driver fixes"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/mxs: Enable SKIP_SET_WAKE and MASK_ON_SUSPEND
irqchip/keystone: Fix "scheduling while atomic" on rt
Pull btrfs fixes from Chris Mason:
"This has two last minute fixes. The highest priority here is a
regression fix for the decompression code, but we also fixed up a
problem with the 32-bit compat ioctls.
The decompression bug could hand back the wrong data on big reads when
zlib was used. I have a larger cleanup to make the math here less
error prone, but at this stage in the release Omar's patch is the best
choice"
* 'for-linus-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: fix btrfs_decompress_buf2page()
btrfs: fix btrfs_compat_ioctl failures on non-compat ioctls
Six fairly small fixes. None is a real show stopper, two automation
detected problems: one memory leak, one use after free and four others
each of which fixes something that has been a significant source of
annoyance to someone.
Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Six fairly small fixes. None is a real show stopper, two automation
detected problems: one memory leak, one use after free and four others
each of which fixes something that has been a significant source of
annoyance to someone"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: zfcp: fix use-after-free by not tracing WKA port open/close on failed send
scsi: aacraid: Fix INTx/MSI-x issue with older controllers
scsi: mpt3sas: disable ASPM for MPI2 controllers
scsi: mpt3sas: Force request partial completion alignment
scsi: qla2xxx: Avoid that issuing a LIP triggers a kernel crash
scsi: qla2xxx: Fix a recently introduced memory leak
If btrfs_decompress_buf2page() is handed a bio with its page in the
middle of the working buffer, then we adjust the offset into the working
buffer. After we copy into the bio, we advance the iterator by the
number of bytes we copied. Then, we have some logic to handle the case
of discontiguous pages and adjust the offset into the working buffer
again. However, if we didn't advance the bio to a new page, we may enter
this case in error, essentially repeating the adjustment that we already
made when we entered the function. The end result is bogus data in the
bio.
Previously, we only checked for this case when we advanced to a new
page, but the conversion to bio iterators changed that. This restores
the old, correct behavior.
A case I saw when testing with zlib was:
buf_start = 42769
total_out = 46865
working_bytes = total_out - buf_start = 4096
start_byte = 45056
The condition (total_out > start_byte && buf_start < start_byte) is
true, so we adjust the offset:
buf_offset = start_byte - buf_start = 2287
working_bytes -= buf_offset = 1809
current_buf_start = buf_start = 42769
Then, we copy
bytes = min(bvec.bv_len, PAGE_SIZE - buf_offset, working_bytes) = 1809
buf_offset += bytes = 4096
working_bytes -= bytes = 0
current_buf_start += bytes = 44578
After bio_advance(), we are still in the same page, so start_byte is the
same. Then, we check (total_out > start_byte && current_buf_start < start_byte),
which is true! So, we adjust the values again:
buf_offset = start_byte - buf_start = 2287
working_bytes = total_out - start_byte = 1809
current_buf_start = buf_start + buf_offset = 45056
But note that working_bytes was already zero before this, so we should
have stopped copying.
Fixes: 974b1adc3b ("btrfs: use bio iterators for the decompression handlers")
Reported-by: Pat Erley <pat-lkml@erley.org>
Reviewed-by: Chris Mason <clm@fb.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Tested-by: Liu Bo <bo.li.liu@oracle.com>
Pull networking fixes from David Miller:
1) If the timing is wrong we can indefinitely stop generating new ipv6
temporary addresses, from Marcus Huewe.
2) Don't double free per-cpu stats in ipv6 SIT tunnel driver, from Cong
Wang.
3) Put protections in place so that AF_PACKET is not able to submit
packets which don't even have a link level header to drivers. From
Willem de Bruijn.
4) Fix memory leaks in ipv4 and ipv6 multicast code, from Hangbin Liu.
5) Don't use udp_ioctl() in l2tp code, UDP version expects a UDP socket
and that doesn't go over very well when it is passed an L2TP one.
Fix from Eric Dumazet.
6) Don't crash on NULL pointer in phy_attach_direct(), from Florian
Fainelli.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
l2tp: do not use udp_ioctl()
xen-netfront: Delete rx_refill_timer in xennet_disconnect_backend()
NET: mkiss: Fix panic
net: hns: Fix the device being used for dma mapping during TX
net: phy: Initialize mdio clock at probe function
igmp, mld: Fix memory leak in igmpv3/mld_del_delrec()
xen-netfront: Improve error handling during initialization
sierra_net: Skip validating irrelevant fields for IDLE LSIs
sierra_net: Add support for IPv6 and Dual-Stack Link Sense Indications
kcm: fix 0-length case for kcm_sendmsg()
xen-netfront: Rework the fix for Rx stall during OOM and network stress
net: phy: Fix PHY module checks and NULL deref in phy_attach_direct()
net: thunderx: Fix PHY autoneg for SGMII QLM mode
net: dsa: Do not destroy invalid network devices
ping: fix a null pointer dereference
packet: round up linear to header len
net: introduce device min_header_len
sit: fix a double free on error path
lwtunnel: valid encap attr check should return 0 when lwtunnel is disabled
ipv6: addrconf: fix generation of new temporary addresses
- Two security related issues in the rxe driver
- One compile issue in the RDMA uapi header
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Pull rdma fixes from Doug Ledford:
"Third round of -rc fixes for 4.10 kernel:
- two security related issues in the rxe driver
- one compile issue in the RDMA uapi header"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
RDMA: Don't reference kernel private header from UAPI header
IB/rxe: Fix mem_check_range integer overflow
IB/rxe: Fix resid update
Pull i2c bugfixes from Wolfram Sang:
"Two bugfixes (proper IO mapping and use of mutex) for a driver feature
we introduced in this cycle"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: piix4: Request the SMBUS semaphore inside the mutex
i2c: piix4: Fix request_region size
here is the last-minute fixes for 4.10 final (or -rc8): two fixes for
races in ALSA sequencer queue spotted by syzkaller, a revert for a
regression of LINE6 driver (since 4.9), and a trivial new codec ID
addition for Nvidia HDMI.
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Merge tag 'sound-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Here are some last-minute fixes: two fixes for races in ALSA sequencer
queue spotted by syzkaller, a revert for a regression of LINE6 driver
(since 4.9), and a trivial new codec ID addition for Nvidia HDMI"
* tag 'sound-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - adding a new NV HDMI/DP codec ID in the driver
ALSA: seq: Fix race at creating a queue
Revert "ALSA: line6: Only determine control port properties if needed"
ALSA: seq: Don't handle loop timeout at snd_seq_pool_done()
fixable, but at least one of the fixes is a little ugly. The original
bug has always been there, so we can wait another week or two to get
this right.
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Merge tag 'nfsd-4.10-3' of git://linux-nfs.org/~bfields/linux
Pull nfsd revert from Bruce Fields:
"This patch turned out to have a couple problems. The problems are
fixable, but at least one of the fixes is a little ugly. The original
bug has always been there, so we can wait another week or two to get
this right"
* tag 'nfsd-4.10-3' of git://linux-nfs.org/~bfields/linux:
nfsd: Revert "nfsd: special case truncates some more"
Four fixes from Ben:
- Userspace was semi-randomly segfaulting on radix due to us incorrectly
handling a fault triggered by autonuma, caused by a patch we merged earlier
in v4.10 to prevent the kernel executing userspace.
- We weren't marking host IPIs properly for KVM in the OPAL ICP backend.
- The ERAT flushing on radix was missing an isync and was incorrectly marked
as DD1 only.
- The powernv CPU hotplug code was missing a wakeup type and failing to flush
the interrupt correctly when using OPAL ICP.
Thanks to:
Benjamin Herrenschmidt.
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Merge tag 'powerpc-4.10-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes friom Michael Ellerman:
"Apologies for the late pull request, but Ben has been busy finding bugs.
- Userspace was semi-randomly segfaulting on radix due to us
incorrectly handling a fault triggered by autonuma, caused by a
patch we merged earlier in v4.10 to prevent the kernel executing
userspace.
- We weren't marking host IPIs properly for KVM in the OPAL ICP
backend.
- The ERAT flushing on radix was missing an isync and was incorrectly
marked as DD1 only.
- The powernv CPU hotplug code was missing a wakeup type and failing
to flush the interrupt correctly when using OPAL ICP
Thanks to Benjamin Herrenschmidt"
* tag 'powerpc-4.10-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/powernv: Properly set "host-ipi" on IPIs
powerpc/powernv: Fix CPU hotplug to handle waking on HVI
powerpc/mm/radix: Update ERAT flushes when invalidating TLB
powerpc/mm: Fix spurrious segfaults on radix with autonuma
udp_ioctl(), as its name suggests, is used by UDP protocols,
but is also used by L2TP :(
L2TP should use its own handler, because it really does not
look the same.
SIOCINQ for instance should not assume UDP checksum or headers.
Thanks to Andrey and syzkaller team for providing the report
and a nice reproducer.
While crashes only happen on recent kernels (after commit
7c13f97ffd ("udp: do fwd memory scheduling on dequeue")), this
probably needs to be backported to older kernels.
Fixes: 7c13f97ffd ("udp: do fwd memory scheduling on dequeue")
Fixes: 8558467201 ("udp: Fix udp_poll() and ioctl()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
rx_refill_timer should be deleted as soon as we disconnect from the
backend since otherwise it is possible for the timer to go off before
we get to xennet_destroy_queues(). If this happens we may dereference
queue->rx.sring which is set to NULL in xennet_disconnect_backend().
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
CC: stable@vger.kernel.org
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If a USB-to-serial adapter is unplugged, the driver re-initializes, with
dev->hard_header_len and dev->addr_len set to zero, instead of the correct
values. If then a packet is sent through the half-dead interface, the
kernel will panic due to running out of headroom in the skb when pushing
for the AX.25 headers resulting in this panic:
[<c0595468>] (skb_panic) from [<c0401f70>] (skb_push+0x4c/0x50)
[<c0401f70>] (skb_push) from [<bf0bdad4>] (ax25_hard_header+0x34/0xf4 [ax25])
[<bf0bdad4>] (ax25_hard_header [ax25]) from [<bf0d05d4>] (ax_header+0x38/0x40 [mkiss])
[<bf0d05d4>] (ax_header [mkiss]) from [<c041b584>] (neigh_compat_output+0x8c/0xd8)
[<c041b584>] (neigh_compat_output) from [<c043e7a8>] (ip_finish_output+0x2a0/0x914)
[<c043e7a8>] (ip_finish_output) from [<c043f948>] (ip_output+0xd8/0xf0)
[<c043f948>] (ip_output) from [<c043f04c>] (ip_local_out_sk+0x44/0x48)
This patch makes mkiss behave like the 6pack driver. 6pack does not
panic. In 6pack.c sp_setup() (same function name here) the values for
dev->hard_header_len and dev->addr_len are set to the same values as in
my mkiss patch.
[ralf@linux-mips.org: Massages original submission to conform to the usual
standards for patch submissions.]
Signed-off-by: Thomas Osterried <thomas@osterried.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch fixes the device being used to DMA map skb->data.
Erroneous device assignment causes the crash when SMMU is enabled.
This happens during TX since buffer gets DMA mapped with device
correspondign to net_device and gets unmapped using the device
related to DSAF.
Signed-off-by: Kejian Yan <yankejian@huawei.com>
Reviewed-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
- keystone: Fix scheduling while atomic for realtime
- mxs: Enable SKIP_SET_WAKE and MASK_ON_SUSPEND
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Merge tag 'irqchip-fixes-4.10' of git://git.infradead.org/users/jcooper/linux into irq/urgent
Pull irqchip fixes for v4.10 from Jason Cooper
- keystone: Fix scheduling while atomic for realtime
- mxs: Enable SKIP_SET_WAKE and MASK_ON_SUSPEND
CONFIG_KASAN=y needs a lot of virtual memory mapped for its shadow.
In that case ptdump_walk_pgd_level_core() takes a lot of time to
walk across all page tables and doing this without
a rescheduling causes soft lockups:
NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [swapper/0:1]
...
Call Trace:
ptdump_walk_pgd_level_core+0x40c/0x550
ptdump_walk_pgd_level_checkwx+0x17/0x20
mark_rodata_ro+0x13b/0x150
kernel_init+0x2f/0x120
ret_from_fork+0x2c/0x40
I guess that this issue might arise even without KASAN on huge machines
with several terabytes of RAM.
Stick cond_resched() in pgd loop to fix this.
Reported-by: Tobias Regnery <tobias.regnery@gmail.com>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: kasan-dev@googlegroups.com
Cc: Alexander Potapenko <glider@google.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20170210095405.31802-1-aryabinin@virtuozzo.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
When the TSC is marked reliable then the synchronization check is skipped,
but that also skips the TSC ADJUST sanitizing code. So on a machine with a
wreckaged BIOS the TSC deviation between CPUs might go unnoticed.
Let the TSC adjust sanitizing code run unconditionally and just skip the
expensive synchronization checks when TSC is marked reliable.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Olof Johansson <olof@lixom.net>
Link: http://lkml.kernel.org/r/20170209151231.491189912@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Olof reported that on a machine which has a BIOS wreckaged TSC the
timestamps in dmesg are making a large jump because the TSC value is
jumping forward after resetting the TSC ADJUST register to a sane value.
This can be avoided by calling the TSC ADJUST saniziting function before
initializing the per cpu sched clock machinery. That takes the offset into
account and avoid the time jump.
What cannot be avoided is that the 'Firmware Bug' warnings on the secondary
CPUs are printed with the large time offsets because it would be too much
effort and ugly hackery to print those warnings into a buffer and emit them
after the adjustemt on the starting CPUs. It's a firmware bug and should be
fixed in firmware. The weird timestamps are collateral damage and just
illustrate the sillyness of the BIOS folks:
[ 0.397445] smp: Bringing up secondary CPUs ...
[ 0.402100] x86: Booting SMP configuration:
[ 0.406343] .... node #0, CPUs: #1
[1265776479.930667] [Firmware Bug]: TSC ADJUST differs: Reference CPU0: -2978888639075328 CPU1: -2978888639183101
[1265776479.944664] TSC ADJUST synchronize: Reference CPU0: 0 CPU1: -2978888639183101
[ 0.508119] #2
[1265776480.032346] [Firmware Bug]: TSC ADJUST differs: Reference CPU0: -2978888639075328 CPU2: -2978888639183677
[1265776480.044192] TSC ADJUST synchronize: Reference CPU0: 0 CPU2: -2978888639183677
[ 0.607643] #3
[1265776480.131874] [Firmware Bug]: TSC ADJUST differs: Reference CPU0: -2978888639075328 CPU3: -2978888639184530
[1265776480.143720] TSC ADJUST synchronize: Reference CPU0: 0 CPU3: -2978888639184530
[ 0.707108] smp: Brought up 1 node, 4 CPUs
[ 0.711271] smpboot: Total of 4 processors activated (21698.88 BogoMIPS)
Reported-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170209151231.411460506@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
ts->next_tick keeps track of the next tick deadline in order to optimize
clock programmation on irq exit and avoid redundant clock device writes.
Now if ts->next_tick missed an update, we may spuriously miss a clock
reprog later as the nohz code is fooled by an obsolete next_tick value.
This is what happens here on a specific path: when we observe an
expired timer from the nohz update code on irq exit, we perform a soft
tick restart which simply fires the closest possible tick without
actually exiting the nohz mode and restoring a periodic state. But we
forget to update ts->next_tick accordingly.
As a result, after the next tick resulting from such soft tick restart,
the nohz code sees a stale value on ts->next_tick which doesn't match
the clock deadline that just expired. If that obsolete ts->next_tick
value happens to collide with the actual next tick deadline to be
scheduled, we may spuriously bypass the clock reprogramming. In the
worst case, the tick may never fire again.
Fix this with a ts->next_tick reset on soft tick restart.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed: Wanpeng Li <wanpeng.li@hotmail.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1486485894-29173-1-git-send-email-fweisbec@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Alexei had his box explode because doing read() on a package
(rapl/uncore) event that isn't currently scheduled in ends up doing an
out-of-bounds load.
Rework the code to more explicitly deal with event->oncpu being -1.
Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Tested-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: David Carrillo-Cisneros <davidcc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: eranian@google.com
Fixes: d6a2f9035b ("perf/core: Introduce PMU_EV_CAP_READ_ACTIVE_PKG")
Link: http://lkml.kernel.org/r/20170131102710.GL6515@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This patch incorrectly attempted nested mnt_want_write, and incorrectly
disabled nfsd's owner override for truncate. We'll fix those problems
and make another attempt soon, for the moment I think the safest is to
revert.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Merge tag 'drm-fixes-for-v4.10-rc8' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"This should be the final set of drm fixes for 4.10: one vmwgfx boot
fix, one vc4 fix, and a few i915 fixes:
* tag 'drm-fixes-for-v4.10-rc8' of git://people.freedesktop.org/~airlied/linux:
drm: vc4: adapt to new behaviour of drm_crtc.c
drm/i915: Always convert incoming exec offsets to non-canonical
drm/i915: Remove overzealous fence warn on runtime suspend
drm/i915/bxt: Add MST support when do DPLL calculation
drm/i915: don't warn about Skylake CPU - KabyPoint PCH combo
drm/i915: fix i915 running as dom0 under Xen
drm/i915: Flush untouched framebuffers before display on !llc
drm/i915: fix use-after-free in page_flip_completed()
drm/vmwgfx: Fix depth input into drm_mode_legacy_fb_format
Dan Carpenter kindly reported:
<quote>
The patch d27a7cb919: "zfcp: trace on request for open and close of
WKA port" from Aug 10, 2016, leads to the following static checker
warning:
drivers/s390/scsi/zfcp_fsf.c:1615 zfcp_fsf_open_wka_port()
warn: 'req' was already freed.
drivers/s390/scsi/zfcp_fsf.c
1609 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1610 retval = zfcp_fsf_req_send(req);
1611 if (retval)
1612 zfcp_fsf_req_free(req);
^^^
Freed.
1613 out:
1614 spin_unlock_irq(&qdio->req_q_lock);
1615 if (req && !IS_ERR(req))
1616 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req->req_id);
^^^^^^^^^^^
Use after free.
1617 return retval;
1618 }
Same thing for zfcp_fsf_close_wka_port() as well.
</quote>
Rather than relying on req being NULL (or ERR_PTR) for all cases where
we don't want to trace or should not trace,
simply check retval which is unconditionally initialized with -EIO != 0
and it can only become 0 on successful retval = zfcp_fsf_req_send(req).
With that we can also remove the then again unnecessary unconditional
initialization of req which was introduced with that earlier commit.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Suggested-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Fixes: d27a7cb919 ("zfcp: trace on request for open and close of WKA port")
Cc: <stable@vger.kernel.org> #2.6.38+
Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Reviewed-by: Jens Remus <jremus@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
commit 78cbccd3bd ("aacraid: Fix for KDUMP driver hang")
caused a problem on older controllers which do not support MSI-x (namely
ASR3405,ASR3805). This patch conditionalizes the previous patch to
controllers which support MSI-x
Cc: <stable@vger.kernel.org> # v4.7+
Fixes: 78cbccd3bd ("aacraid: Fix for KDUMP driver hang")
Reported-by: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
Signed-off-by: Dave Carroll <david.carroll@microsemi.com>
Reviewed-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Hopefully final fixes for v4.10, about half of them stable material.
* tag 'drm-intel-fixes-2017-02-09' of git://anongit.freedesktop.org/git/drm-intel:
drm/i915: Always convert incoming exec offsets to non-canonical
drm/i915: Remove overzealous fence warn on runtime suspend
drm/i915/bxt: Add MST support when do DPLL calculation
drm/i915: don't warn about Skylake CPU - KabyPoint PCH combo
drm/i915: fix i915 running as dom0 under Xen
drm/i915: Flush untouched framebuffers before display on !llc
drm/i915: fix use-after-free in page_flip_completed()
Last-minute vc4 fix for 4.10.
* tag 'drm-misc-fixes-2017-02-09' of git://anongit.freedesktop.org/git/drm-misc:
drm: vc4: adapt to new behaviour of drm_crtc.c
MPI2 controllers sometimes got lost (i.e. disappear from
/sys/bus/pci/devices) if ASMP is enabled.
Signed-off-by: Slava Kardakov <ojab@ojab.ru>
Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=60644
Cc: <stable@vger.kernel.org>
Acked-by: Sreekanth Reddy <Sreekanth.Reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
USB PHYs need the MDIO clock divisor enabled earlier to work.
Initialize mdio clock divisor in probe function. The ext bus
bit available in the same register will be used by mdio mux
to enable external mdio.
Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>
Fixes: ddc24ae1 ("net: phy: Broadcom iProc MDIO bus driver")
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In function igmpv3/mld_add_delrec() we allocate pmc and put it in
idev->mc_tomb, so we should free it when we don't need it in del_delrec().
But I removed kfree(pmc) incorrectly in latest two patches. Now fix it.
Fixes: 24803f38a5 ("igmp: do not remove igmp souce list info when ...")
Fixes: 1666d49e1d ("mld: do not remove mld souce list info when ...")
Reported-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This fixes a crash when running out of grant refs when creating many
queues across many netdevs.
* If creating queues fails (i.e. there are no grant refs available),
call xenbus_dev_fatal() to ensure that the xenbus device is set to the
closed state.
* If no queues are created, don't call xennet_disconnect_backend as
netdev->real_num_tx_queues will not have been set correctly.
* If setup_netfront() fails, ensure that all the queues created are
cleaned up, not just those that have been set up.
* If any queues were set up and an error occurs, call
xennet_destroy_queues() to clean up the napi context.
* If any fatal error occurs, unregister and destroy the netdev to avoid
leaving around a half setup network device.
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stefan Brüns says:
====================
Fixes for sierra_net driver
When trying to initiate a dual-stack (ipv4v6) connection, a MC7710, FW
version SWI9200X_03.05.24.00ap answers with an unsupported LSI. Add support
for this LSI.
Also the link_type should be ignored when going idle, otherwise the modem
is stuck in a bad link state.
Tested on MC7710, T-Mobile DE, APN internet.telekom, IPv4v6 PDP type. Both
IPv4 and IPv6 connections work.
v2: Do not overwrite protocol field in rx_fixup
v3: Remove leftover struct ethhdr *eth declaration
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
When the context is deactivated, the link_type is set to 0xff, which
triggers a warning message, and results in a wrong link status, as
the LSI is ignored.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
If a context is configured as dualstack ("IPv4v6"), the modem indicates
the context activation with a slightly different indication message.
The dual-stack indication omits the link_type (IPv4/v6) and adds
additional address fields.
IPv6 LSIs are identical to IPv4 LSIs, but have a different link type.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Reviewed-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Dmitry reported a kernel warning:
WARNING: CPU: 3 PID: 2936 at net/kcm/kcmsock.c:627
kcm_write_msgs+0x12e3/0x1b90 net/kcm/kcmsock.c:627
CPU: 3 PID: 2936 Comm: a.out Not tainted 4.10.0-rc6+ #209
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:15 [inline]
dump_stack+0x2ee/0x3ef lib/dump_stack.c:51
panic+0x1fb/0x412 kernel/panic.c:179
__warn+0x1c4/0x1e0 kernel/panic.c:539
warn_slowpath_null+0x2c/0x40 kernel/panic.c:582
kcm_write_msgs+0x12e3/0x1b90 net/kcm/kcmsock.c:627
kcm_sendmsg+0x163a/0x2200 net/kcm/kcmsock.c:1029
sock_sendmsg_nosec net/socket.c:635 [inline]
sock_sendmsg+0xca/0x110 net/socket.c:645
sock_write_iter+0x326/0x600 net/socket.c:848
new_sync_write fs/read_write.c:499 [inline]
__vfs_write+0x483/0x740 fs/read_write.c:512
vfs_write+0x187/0x530 fs/read_write.c:560
SYSC_write fs/read_write.c:607 [inline]
SyS_write+0xfb/0x230 fs/read_write.c:599
entry_SYSCALL_64_fastpath+0x1f/0xc2
when calling syscall(__NR_write, sock2, 0x208aaf27ul, 0x0ul) on a KCM
seqpacket socket. It appears that kcm_sendmsg() does not handle len==0
case correctly, which causes an empty skb is allocated and queued.
Fix this by skipping the skb allocation for len==0 case.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Tom Herbert <tom@herbertland.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The commit 90c311b0ee ("xen-netfront: Fix Rx stall during network
stress and OOM") caused the refill timer to be triggerred almost on
all invocations of xennet_alloc_rx_buffers for certain workloads.
This reworks the fix by reverting to the old behaviour and taking into
consideration the skb allocation failure. Refill timer is now triggered
on insufficient requests or skb allocation failure.
Signed-off-by: Vineeth Remanan Pillai <vineethp@amazon.com>
Fixes: 90c311b0ee (xen-netfront: Fix Rx stall during network stress and OOM)
Reported-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull SCSI target fixes from Nicholas Bellinger:
"This target series for v4.10 contains fixes which address a few
long-standing bugs that DATERA's QA + automation teams have uncovered
while putting v4.1.y target code into production usage.
We've been running the top three in our nightly automated regression
runs for the last two months, and the COMPARE_AND_WRITE fix Mr. Gary
Guo has been manually verifying against a four node ESX cluster this
past week.
Note all of them have CC' stable tags.
Summary:
- Fix a bug with ESX EXTENDED_COPY + SAM_STAT_RESERVATION_CONFLICT
status, where target_core_xcopy.c logic was incorrectly returning
SAM_STAT_CHECK_CONDITION for all non SAM_STAT_GOOD cases (Nixon
Vincent)
- Fix a TMR LUN_RESET hung task bug while other in-flight TMRs are
being aborted, before the new one had been dispatched into tmr_wq
(Rob Millner)
- Fix a long standing double free OOPs, where a dynamically generated
'demo-mode' NodeACL has multiple sessions associated with it, and
the /sys/kernel/config/target/$FABRIC/$WWN/ subsequently disables
demo-mode, but never converts the dynamic ACL into a explicit ACL
(Rob Millner)
- Fix a long standing reference leak with ESX VAAI COMPARE_AND_WRITE
when the second phase WRITE COMMIT command fails, resulting in
CHECK_CONDITION response never being sent and se_cmd->cmd_kref
never reaching zero (Gary Guo)
Beyond these items on v4.1.y we've reproduced, fixed, and run through
our regression test suite using iscsi-target exports, there are two
additional outstanding list items:
- Remove a >= v4.2 RCU conversion BUG_ON that would trigger when
dynamic node NodeACLs where being converted to explicit NodeACLs.
The patch drops the BUG_ON to follow how pre RCU conversion worked
for this special case (Benjamin Estrabaud)
- Add ibmvscsis target_core_fabric_ops->max_data_sg_nent assignment
to match what IBM's Virtual SCSI hypervisor is already enforcing at
transport layer. (Bryant Ly + Steven Royer)"
* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
ibmvscsis: Add SGL limit
target: Fix COMPARE_AND_WRITE ref leak for non GOOD status
target: Fix multi-session dynamic se_node_acl double free OOPs
target: Fix early transport_generic_handle_tmr abort scenario
target: Use correct SCSI status during EXTENDED_COPY exception
target: Don't BUG_ON during NodeACL dynamic -> explicit conversion
The Generic PHY drivers gets assigned after we checked that the current
PHY driver is NULL, so we need to check a few things before we can
safely dereference d->driver. This would be causing a NULL deference to
occur when a system binds to the Generic PHY driver. Update
phy_attach_direct() to do the following:
- grab the driver module reference after we have assigned the Generic
PHY drivers accordingly, and remember we came from the generic PHY
path
- update the error path to clean up the module reference in case the
Generic PHY probe function fails
- split the error path involving phy_detacht() to avoid double free/put
since phy_detach() does all the clean up
- finally, have phy_detach() drop the module reference count before we
call device_release_driver() for the Generic PHY driver case
Fixes: cafe8df8b9 ("net: phy: Fix lack of reference count on PHY driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Comment: Kees Cook <kees@outflux.net>
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Merge tag 'pstore-v4.10-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull pstore fix from Kees Cook:
"Fix pstore regression (boot Oops) when ftrace disabled, from Brian
Norris"
* tag 'pstore-v4.10-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
pstore: don't OOPS when there are no ftrace zones
