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2017-11-01target/iscsi: Simplify timer manipulation codeBart Van Assche
Move timer initialization from before add_timer() to the context where the containing object is initialized. Use setup_timer() and mod_timer() instead of open coding these. Use 'jiffies' instead of get_jiffies_64() when calculating expiry times because expiry times have type unsigned long, just like 'jiffies'. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Andy Grover <agrover@redhat.com> Cc: David Disseldorp <ddiss@suse.de> Signed-off-by: Kees Cook <keescook@chromium.org>
2017-11-01scsi: qla4xxx: Convert timers to use timer_setup()Kees Cook
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: QLogic-Storage-Upstream@qlogic.com Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: linux-scsi@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Acked-by: Manish Rangankar <Manish.Rangankar@cavium.com>
2017-11-01scsi: sas: Convert timers to use timer_setup()Kees Cook
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. This requires adding a pointer to hold the timer's target task, as there isn't a link back from slow_task. Cc: John Garry <john.garry@huawei.com> Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Jack Wang <jinpu.wang@profitbricks.com> Cc: lindar_liu@usish.com Cc: Jens Axboe <axboe@fb.com> Cc: Hannes Reinecke <hare@suse.com> Cc: Johannes Thumshirn <jthumshirn@suse.de> Cc: Benjamin Block <bblock@linux.vnet.ibm.com> Cc: Baoyou Xie <baoyou.xie@linaro.org> Cc: Wei Yongjun <weiyongjun1@huawei.com> Cc: linux-scsi@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Acked-by: John Garry <john.garry@huawei.com> # for hisi_sas part Tested-by: John Garry <john.garry@huawei.com> # basic sanity test for hisi_sas Reviewed-by: Jack Wang <jinpu.wang@profitbricks.com>
2017-11-01scsi: pmcraid: Convert timers to use timer_setup()Kees Cook
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: linux-scsi@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-11-01scsi: megaraid: Convert timers to use timer_setup()Kees Cook
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Also consolidates the timer setup functions arguments, which are all identical, and corrects on-stack timer usage. Cc: Kashyap Desai <kashyap.desai@broadcom.com> Cc: Sumit Saxena <sumit.saxena@broadcom.com> Cc: Shivasharan S <shivasharan.srikanteshwara@broadcom.com> Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: megaraidlinux.pdl@broadcom.com Cc: linux-scsi@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-11-01scsi: lpfc: Convert timers to use timer_setup()Kees Cook
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: James Smart <james.smart@broadcom.com> Cc: Dick Kennedy <dick.kennedy@broadcom.com> Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: linux-scsi@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-11-01scsi: ipr: Convert timers to use timer_setup()Kees Cook
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: Brian King <brking@us.ibm.com> Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: linux-scsi@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-11-01scsi: ibmvscsi: Convert timers to use timer_setup()Kees Cook
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Tyrel Datwyler <tyreld@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: linux-scsi@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Acked-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
2017-11-01scsi: cxgbi: Convert timers to use timer_setup()Kees Cook
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: Karen Xie <kxie@chelsio.com> Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: linux-scsi@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-11-01scsi: csiostor: Convert timers to use timer_setup()Kees Cook
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: Varun Prakash <varun@chelsio.com> Cc: Johannes Thumshirn <jthumshirn@suse.de> Cc: linux-scsi@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-11-01scsi: aic7xxx: Convert timers to use timer_setup()Kees Cook
stat_timer only ever assigns the same function and data, so consolidate to using timer_setup(), adjust callback, drop everything else used to pass things around, and remove needless typedefs. reset_timer is unused; remove it. Cc: Hannes Reinecke <hare@suse.com> Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: linux-scsi@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-11-01timer: Add parenthesis around timer_setup() macro argumentsKees Cook
In the case where expressions are passed as macro arguments, the LOCKDEP version of the timer macros need enclosing parenthesis. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20171101143250.GA65266@beast
2017-11-01drm/vmwgfx: Fix Ubuntu 17.10 Wayland black screen issueSinclair Yeh
This is an extension of Commit 7c20d213dd3c ("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
2017-11-01drm/vmwgfx: constify vmw_fence_opsArvind Yadav
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>
2017-11-01drm/i915: Check incoming alignment for unfenced buffers (on i915gm)Chris Wilson
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 2889caa92321 ("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: 2889caa92321 ("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 1d033beb20d6d5885587a02a393b6598d766a382) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2017-11-01clockevents: Update clockevents device next_event on stopPrasad Sodagudi
clockevent_device::next_event holds the next timer event of a clock event device. The value is updated in clockevents_program_event(), i.e. when the hardware timer is armed for the next expiry. When there are no software timers armed on a CPU, the corresponding per CPU clockevent device is brought into ONESHOT_STOPPED state, but clockevent_device::next_event is not updated, because clockevents_program_event() is not called. So the content of clockevent_device::next_event is stale, which is not an issue when real hardware is used. But the hrtimer broadcast device relies on that information and the stale value causes spurious wakeups. Update clockevent_device::next_event to KTIME_MAX when it has been brought into ONESHOT_STOPPED state to avoid spurious wakeups. This reflects the proper expiry time of the stopped timer: infinity. [ tglx: Massaged changelog ] Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: viresh.kumar@linaro.org Link: https://lkml.kernel.org/r/1509043042-32486-1-git-send-email-psodagud@codeaurora.org
2017-11-01Merge tag 'asoc-fix-v4.14-rc7' of ↵Takashi Iwai
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.
2017-11-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
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
2017-11-01x86/mm: fix use-after-free of vma during userfaultfd faultVlastimil Babka
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 a3c4fb7c9c2e ("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>
2017-11-01Merge tag 'smb3-file-name-too-long-fix' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds
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
2017-11-01perf srcline: Show correct function name for srcline of callchainsNamhyung Kim
When libbfd is not used, it doesn't show proper function name and reuse the original symbol of the sample. That's because it passes the original sym to inline_list__append(). As `addr2line -f` returns function names as well, use that to create an inline_sym and pass it to inline_list__append(). For example, following data shows that inlined entries of main have same name (main). Before: $ perf report -g srcline -q | head 45.22% inlining libm-2.26.so [.] __hypot_finite | ---__hypot_finite ??:0 | |--44.15%--hypot ??:0 | main complex:589 | main complex:597 | main complex:654 | main complex:664 | main inlining.cpp:14 After: $ perf report -g srcline -q | head 45.22% inlining libm-2.26.so [.] __hypot_finite | ---__hypot_finite | |--44.15%--hypot | std::__complex_abs complex:589 (inlined) | std::abs<double> complex:597 (inlined) | std::_Norm_helper<true>::_S_do_it<double> complex:654 (inlined) | std::norm<double> complex:664 (inlined) | main inlining.cpp:14 Signed-off-by: Namhyung Kim <namhyung@kernel.org> Reviewed-by: Jiri Olsa <jolsa@kernel.org> Reviewed-by: Milian Wolff <milian.wolff@kdab.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20171031020654.31163-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-11-01perf srcline: Fix memory leak in addr2inlines()Namhyung Kim
When libbfd is not used, addr2inlines() executes `addr2line -i` and process output line by line. But it resets filename to NULL in the loop so getline() allocates additional memory everytime instead of realloc. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20171031020654.31163-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-11-01ide:ide-cd: fix kernel panic resulting from missing scsi_req_initHongxu Jia
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: 82ed4db499b8 ("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>
2017-11-01mmc: dw_mmc: Fix the DTO timeout calculationDouglas Anderson
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 16a34574c6ca ("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: 16a34574c6ca ("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>
2017-11-01Merge remote-tracking branches 'asoc/fix/topology', 'asoc/fix/adau17x1', ↵Mark Brown
'asoc/fix/rt5514', 'asoc/fix/rt5616', 'asoc/fix/rt5659' and 'asoc/fix/rt5663' into tmp
2017-11-01hwmon: (xgene) Minor clean up of ifdef and acpi_match_table referencehotran
This patch removes the un-necessary ifdef CONFIG_ACPI and directly uses the acpi_match_table from the driver pdev. Signed-off-by: Hoan Tran <hotran@apm.com> [groeck: Dropped unnecessary initialization] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-11-01tcp: fix tcp_mtu_probe() vs highest_sackEric Dumazet
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: a47e5a988a57 ("[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>
2017-11-01ipv6: addrconf: increment ifp refcount before ipv6_del_addr()Eric Dumazet
In the (unlikely) event fixup_permanent_addr() returns a failure, addrconf_permanent_addr() calls ipv6_del_addr() without the mandatory call to in6_ifa_hold(), leading to a refcount error, spotted by syzkaller : WARNING: CPU: 1 PID: 3142 at lib/refcount.c:227 refcount_dec+0x4c/0x50 lib/refcount.c:227 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 3142 Comm: ip Not tainted 4.14.0-rc4-next-20171009+ #33 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 panic+0x1e4/0x41c kernel/panic.c:181 __warn+0x1c4/0x1e0 kernel/panic.c:544 report_bug+0x211/0x2d0 lib/bug.c:183 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline] do_trap+0x260/0x390 arch/x86/kernel/traps.c:261 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905 RIP: 0010:refcount_dec+0x4c/0x50 lib/refcount.c:227 RSP: 0018:ffff8801ca49e680 EFLAGS: 00010286 RAX: 000000000000002c RBX: ffff8801d07cfcdc RCX: 0000000000000000 RDX: 000000000000002c RSI: 1ffff10039493c90 RDI: ffffed0039493cc4 RBP: ffff8801ca49e688 R08: ffff8801ca49dd70 R09: 0000000000000000 R10: ffff8801ca49df58 R11: 0000000000000000 R12: 1ffff10039493cd9 R13: ffff8801ca49e6e8 R14: ffff8801ca49e7e8 R15: ffff8801d07cfcdc __in6_ifa_put include/net/addrconf.h:369 [inline] ipv6_del_addr+0x42b/0xb60 net/ipv6/addrconf.c:1208 addrconf_permanent_addr net/ipv6/addrconf.c:3327 [inline] addrconf_notify+0x1c66/0x2190 net/ipv6/addrconf.c:3393 notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x32/0x60 net/core/dev.c:1697 call_netdevice_notifiers net/core/dev.c:1715 [inline] __dev_notify_flags+0x15d/0x430 net/core/dev.c:6843 dev_change_flags+0xf5/0x140 net/core/dev.c:6879 do_setlink+0xa1b/0x38e0 net/core/rtnetlink.c:2113 rtnl_newlink+0xf0d/0x1a40 net/core/rtnetlink.c:2661 rtnetlink_rcv_msg+0x733/0x1090 net/core/rtnetlink.c:4301 netlink_rcv_skb+0x216/0x440 net/netlink/af_netlink.c:2408 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4313 netlink_unicast_kernel net/netlink/af_netlink.c:1273 [inline] netlink_unicast+0x4e8/0x6f0 net/netlink/af_netlink.c:1299 netlink_sendmsg+0xa4a/0xe70 net/netlink/af_netlink.c:1862 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 ___sys_sendmsg+0x75b/0x8a0 net/socket.c:2049 __sys_sendmsg+0xe5/0x210 net/socket.c:2083 SYSC_sendmsg net/socket.c:2094 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2090 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x7fa9174d3320 RSP: 002b:00007ffe302ae9e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ffe302b2ae0 RCX: 00007fa9174d3320 RDX: 0000000000000000 RSI: 00007ffe302aea20 RDI: 0000000000000016 RBP: 0000000000000082 R08: 0000000000000000 R09: 000000000000000f R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe302b32a0 R13: 0000000000000000 R14: 00007ffe302b2ab8 R15: 00007ffe302b32b8 Fixes: f1705ec197e7 ("net: ipv6: Make address flushing on ifdown optional") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: David Ahern <dsahern@gmail.com> Acked-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-01tun/tap: sanitize TUNSETSNDBUF inputCraig Gallek
Syzkaller found several variants of the lockup below by setting negative values with the TUNSETSNDBUF ioctl. This patch adds a sanity check to both the tun and tap versions of this ioctl. watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [repro:2389] Modules linked in: irq event stamp: 329692056 hardirqs last enabled at (329692055): [<ffffffff824b8381>] _raw_spin_unlock_irqrestore+0x31/0x75 hardirqs last disabled at (329692056): [<ffffffff824b9e58>] apic_timer_interrupt+0x98/0xb0 softirqs last enabled at (35659740): [<ffffffff824bc958>] __do_softirq+0x328/0x48c softirqs last disabled at (35659731): [<ffffffff811c796c>] irq_exit+0xbc/0xd0 CPU: 0 PID: 2389 Comm: repro Not tainted 4.14.0-rc7 #23 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff880009452140 task.stack: ffff880006a20000 RIP: 0010:_raw_spin_lock_irqsave+0x11/0x80 RSP: 0018:ffff880006a27c50 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: ffff880009ac68d0 RBX: ffff880006a27ce0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffff880006a27ce0 RDI: ffff880009ac6900 RBP: ffff880006a27c60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 000000000063ff00 R12: ffff880009ac6900 R13: ffff880006a27cf8 R14: 0000000000000001 R15: ffff880006a27cf8 FS: 00007f4be4838700(0000) GS:ffff88000cc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020101000 CR3: 0000000009616000 CR4: 00000000000006f0 Call Trace: prepare_to_wait+0x26/0xc0 sock_alloc_send_pskb+0x14e/0x270 ? remove_wait_queue+0x60/0x60 tun_get_user+0x2cc/0x19d0 ? __tun_get+0x60/0x1b0 tun_chr_write_iter+0x57/0x86 __vfs_write+0x156/0x1e0 vfs_write+0xf7/0x230 SyS_write+0x57/0xd0 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x7f4be4356df9 RSP: 002b:00007ffc18101c08 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4be4356df9 RDX: 0000000000000046 RSI: 0000000020101000 RDI: 0000000000000005 RBP: 00007ffc18101c40 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000293 R12: 0000559c75f64780 R13: 00007ffc18101d30 R14: 0000000000000000 R15: 0000000000000000 Fixes: 33dccbb050bb ("tun: Limit amount of queued packets per device") Fixes: 20d29d7a916a ("net: macvtap driver") Signed-off-by: Craig Gallek <kraig@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-01mlxsw: i2c: Fix buffer increment counter for write transactionVadim Pasternak
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: 6882b0aee180 ("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>
2017-11-01netfilter: nf_reject_ipv4: Fix use-after-free in send_resetTejaswi Tanikella
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>
2017-11-01Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec 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>
2017-11-01regmap: Add hardware spinlock supportBaolin Wang
On some platforms, when reading or writing some special registers through regmap, we should acquire one hardware spinlock to synchronize between the multiple subsystems. Thus this patch adds the hardware spinlock support for regmap. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-11-01irq/core: Fix boot crash when the irqaffinity= boot parameter is passed on ↵Rakib Mullick
CPUMASK_OFFSTACK=y kernels(v1) When the irqaffinity= kernel parameter is passed in a CPUMASK_OFFSTACK=y kernel, it fails to boot, because zalloc_cpumask_var() cannot be used before initializing the slab allocator to allocate a cpumask. So, use alloc_bootmem_cpumask_var() instead. Also do some cleanups while at it: in init_irq_default_affinity() remove an #ifdef via using cpumask_available(). Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20171026045800.27087-1-rakib.mullick@gmail.com Link: http://lkml.kernel.org/r/20171101041451.12581-1-rakib.mullick@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-11-01sched/sysctl: Fix attributes of some extern declarationsMatthias Kaehlcke
The definition of sysctl_sched_migration_cost, sysctl_sched_nr_migrate and sysctl_sched_time_avg includes the attribute const_debug. This attribute is not part of the extern declaration of these variables in include/linux/sched/sysctl.h, while it is in kernel/sched/sched.h, and as a result Clang generates warnings like this: kernel/sched/sched.h:1618:33: warning: section attribute is specified on redeclared variable [-Wsection] extern const_debug unsigned int sysctl_sched_time_avg; ^ ./include/linux/sched/sysctl.h:42:21: note: previous declaration is here extern unsigned int sysctl_sched_time_avg; The header only declares the variables when CONFIG_SCHED_DEBUG is defined, therefore it is not necessary to duplicate the definition of const_debug. Instead we can use the attribute __read_mostly, which is the expansion of const_debug when CONFIG_SCHED_DEBUG=y is set. Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Nick Desaulniers <nick.desaulniers@gmail.com> Cc: Douglas Anderson <dianders@chromium.org> Cc: Guenter Roeck <groeck@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Shile Zhang <shile.zhang@nokia.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20171030180816.170850-1-mka@chromium.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-11-01futex: Fix more put_pi_state() vs. exit_pi_state_list() racesPeter Zijlstra
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: c74aef2d06a9 ("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>
2017-11-01powerpc/kprobes: Dereference function pointers only if the address does not ↵Naveen N. Rao
belong to kernel text This makes the changes introduced in commit 83e840c770f2c5 ("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: 83e840c770f2 ("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>
2017-11-01Revert "powerpc64/elfv1: Only dereference function descriptor for non-text ↵Naveen N. Rao
symbols" This reverts commit 83e840c770f2c5 ("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: 83e840c770f2 ("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>
2017-11-01mlxsw: reg: Add high and low temperature thresholdsIdo Schimmel
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: 85926f877040 ("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>
2017-11-01MAINTAINERS: Remove Yotam from mlxfwYuval Mintz
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>
2017-11-01MAINTAINERS: Update Yotam's E-mailYotam Gigi
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>
2017-11-01net: hns: set correct return valuePan Bian
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>
2017-11-01net: lapbether: fix double freePan Bian
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>
2017-11-01bpf: remove SK_REDIRECT from UAPIJohn Fastabend
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>
2017-11-01net: phy: marvell: Only configure RGMII delays when using RGMIIAndrew Lunn
The fix 5987feb38aa5 ("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: 5987feb38aa5 ("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>
2017-11-01Merge tag 'wireless-drivers-for-davem-2017-10-31' of ↵David S. Miller
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>
2017-11-01MIPS: SMP: Fix deadlock & online raceMatt Redfearn
Commit 6f542ebeaee0 ("MIPS: Fix race on setting and getting cpu_online_mask") effectively reverted commit 8f46cca1e6c06 ("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 8df3e07e7f21f ("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 8f46cca1e6c06 ("MIPS: SMP: Fix possibility of deadlock when bringing CPUs online"), through really that race only existed before commit 8df3e07e7f21f ("cpu/hotplug: Let upcoming cpu bring itself fully up"). Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Fixes: 6f542ebeaee0 ("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+: 8f46cca1e6c0: "MIPS: SMP: Fix possibility of deadlock when bringing CPUs online" Cc: <stable@vger.kernel.org> # v4.1+: a00eeede507c: "MIPS: SMP: Use a completion event to signal CPU up" Cc: <stable@vger.kernel.org> # v4.1+: 6f542ebeaee0: "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>
2017-11-01MIPS: bpf: Fix a typo in build_one_insn()Wei Yongjun
Fix a typo in build_one_insn(). Fixes: b6bd53f9c4e8 ("MIPS: Add missing file for eBPF JIT.") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Cc: <stable@vger.kernel.org> # 4.13+ Patchwork: https://patchwork.linux-mips.org/patch/17491/ Signed-off-by: James Hogan <jhogan@kernel.org>
2017-11-01MIPS: microMIPS: Fix incorrect mask in insn_table_MMGustavo A. R. Silva
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: d6b3314b49e1 ("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>
2017-11-01Merge branch 'linux-4.14' of git://github.com/skeggsb/linux into drm-fixesDave Airlie
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