- 15 Jul, 2017 2 commits
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Peter Senna Tschudin authored
commit 4dec2f11 upstream. 18a42088 introduced a change to reduce the RX DMA latency on the first reception when the serial port was opened for reading. However it was claiming a hardirq unsafe lock after a hardirq safe lock which is not allowed and causes lockdep to complain verbosely. This patch changes the code to always start RX DMA earlier, instead of relying on the flags used to open the serial port removing the code that was looking for the serial file flags. Signed-off-by:
Peter Senna Tschudin <peter.senna@collabora.com> Tested-by:
Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by:
Fabio Estevam <festevam@gmail.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Cong Wang authored
commit f991af3d upstream. The retry logic for netlink_attachskb() inside sys_mq_notify() is nasty and vulnerable: 1) The sock refcnt is already released when retry is needed 2) The fd is controllable by user-space because we already release the file refcnt so we when retry but the fd has been just closed by user-space during this small window, we end up calling netlink_detachskb() on the error path which releases the sock again, later when the user-space closes this socket a use-after-free could be triggered. Setting 'sock' to NULL here should be sufficient to fix it. Reported-by:
GeneBlue <geneblue.mail@gmail.com> Signed-off-by:
Cong Wang <xiyou.wangcong@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Manfred Spraul <manfred@colorfullife.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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- 12 Jul, 2017 28 commits
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Greg Kroah-Hartman authored
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Stephan Mueller authored
commit b61929c6 upstream. Initialise ctr_completion variable before use. Cc: <stable@vger.kernel.org> Signed-off-by:
Harsh Jain <harshjain.prof@gmail.com> Signed-off-by:
Stephan Mueller <smueller@chronox.de> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Juergen Gross authored
commit 1a3fc2c4 upstream. There has been a report about a deadlock in the xenbus driver: [ 247.979498] ====================================================== [ 247.985688] WARNING: possible circular locking dependency detected [ 247.991882] 4.12.0-rc4-00022-gc4b25c0 #575 Not tainted [ 247.997040] ------------------------------------------------------ [ 248.003232] xenbus/91 is trying to acquire lock: [ 248.007875] (&u->msgbuffer_mutex){+.+.+.}, at: [<ffff00000863e904>] xenbus_dev_queue_reply+0x3c/0x230 [ 248.017163] [ 248.017163] but task is already holding lock: [ 248.023096] (xb_write_mutex){+.+...}, at: [<ffff00000863a940>] xenbus_thread+0x5f0/0x798 [ 248.031267] [ 248.031267] which lock already depends on the new lock. [ 248.031267] [ 248.039615] [ 248.039615] the existing dependency chain (in reverse order) is: [ 248.047176] [ 248.047176] -> #1 (xb_write_mutex){+.+...}: [ 248.052943] __lock_acquire+0x1728/0x1778 [ 248.057498] lock_acquire+0xc4/0x288 [ 248.061630] __mutex_lock+0x84/0x868 [ 248.065755] mutex_lock_nested+0x3c/0x50 [ 248.070227] xs_send+0x164/0x1f8 [ 248.074015] xenbus_dev_request_and_reply+0x6c/0x88 [ 248.079427] xenbus_file_write+0x260/0x420 [ 248.084073] __vfs_write+0x48/0x138 [ 248.088113] vfs_write+0xa8/0x1b8 [ 248.091983] SyS_write+0x54/0xb0 [ 248.095768] el0_svc_naked+0x24/0x28 [ 248.099897] [ 248.099897] -> #0 (&u->msgbuffer_mutex){+.+.+.}: [ 248.106088] print_circular_bug+0x80/0x2e0 [ 248.110730] __lock_acquire+0x1768/0x1778 [ 248.115288] lock_acquire+0xc4/0x288 [ 248.119417] __mutex_lock+0x84/0x868 [ 248.123545] mutex_lock_nested+0x3c/0x50 [ 248.128016] xenbus_dev_queue_reply+0x3c/0x230 [ 248.133005] xenbus_thread+0x788/0x798 [ 248.137306] kthread+0x110/0x140 [ 248.141087] ret_from_fork+0x10/0x40 It is rather easy to avoid by dropping xb_write_mutex before calling xenbus_dev_queue_reply(). Fixes: fd8aa909 ("xen: optimize xenbus driver for multiple concurrent xenstore accesses"). Reported-by:
Andre Przywara <andre.przywara@arm.com> Signed-off-by:
Juergen Gross <jgross@suse.com> Tested-by:
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Thomas Gleixner authored
commit ff801b71 upstream. Stephen reported the following build warning in UP: kernel/sched/fair.c:2657:9: warning: 'struct sched_domain' declared inside parameter list ^ /home/sfr/next/next/kernel/sched/fair.c:2657:9: warning: its scope is only this definition or declaration, which is probably not what you want Hide the numa_wake_affine() inline stub on UP builds to get rid of it. Fixes: 3fed382b ("sched/numa: Implement NUMA node level wake_affine()") Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Rik van Riel <riel@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by:
Mel Gorman <mgorman@techsingularity.net> Signed-off-by:
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Rik van Riel authored
commit 815abf5a upstream. The effective_load() function was only used by the NUMA balancing code, and not by the regular load balancing code. Now that the NUMA balancing code no longer uses it either, get rid of it. Signed-off-by:
Rik van Riel <riel@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: jhladky@redhat.com Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/20170623165530.22514-5-riel@redhat.comSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Rik van Riel authored
commit 3fed382b upstream. Since select_idle_sibling() can place a task anywhere on a socket, comparing loads between individual CPU cores makes no real sense for deciding whether to do an affine wakeup across sockets, either. Instead, compare the load between the sockets in a similar way the load balancer and the numa balancing code do. Signed-off-by:
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Rik van Riel authored
commit 7d894e6e upstream. Then 'this_cpu' and 'prev_cpu' are in the same socket, select_idle_sibling() will do its thing regardless of the return value of wake_affine(). Just return true and don't look at all the other things. Signed-off-by:
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Rik van Riel authored
commit 739294fb upstream. Several tests in the NAS benchmark seem to run a lot slower with NUMA balancing enabled, than with NUMA balancing disabled. The slower run time corresponds with increased idle time. Overriding the final test of migrate_degrades_locality (but still doing the other NUMA tests first) seems to improve performance of those benchmarks. Reported-by:
Jirka Hladky <jhladky@redhat.com> Signed-off-by:
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Vlastimil Babka authored
commit 8655d549 upstream. A customer has reported a soft-lockup when running an intensive memory stress test, where the trace on multiple CPU's looks like this: RIP: 0010:[<ffffffff810c53fe>] [<ffffffff810c53fe>] native_queued_spin_lock_slowpath+0x10e/0x190 ... Call Trace: [<ffffffff81182d07>] queued_spin_lock_slowpath+0x7/0xa [<ffffffff811bc331>] change_protection_range+0x3b1/0x930 [<ffffffff811d4be8>] change_prot_numa+0x18/0x30 [<ffffffff810adefe>] task_numa_work+0x1fe/0x310 [<ffffffff81098322>] task_work_run+0x72/0x90 Further investigation showed that the lock contention here is pmd_lock(). The task_numa_work() function makes sure that only one thread is let to perform the work in a single scan period (via cmpxchg), but if there's a thread with mmap_sem locked for writing for several periods, multiple threads in task_numa_work() can build up a convoy waiting for mmap_sem for read and then all get unblocked at once. This patch changes the down_read() to the trylock version, which prevents the build up. For a workload experiencing mmap_sem contention, it's probably better to postpone the NUMA balancing work anyway. This seems to have fixed the soft lockups involving pmd_lock(), which is in line with the convoy theory. Signed-off-by:
Vlastimil Babka <vbabka@suse.cz> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by:
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Peter Zijlstra authored
commit 1ad3aaf3 upstream. Hackbench recently suffered a bunch of pain, first by commit: 4c77b18c ("sched/fair: Make select_idle_cpu() more aggressive") and then by commit: c743f0a5 ("sched/fair, cpumask: Export for_each_cpu_wrap()") which fixed a bug in the initial for_each_cpu_wrap() implementation that made select_idle_cpu() even more expensive. The bug was that it would skip over CPUs when bits were consequtive in the bitmask. This however gave me an idea to fix select_idle_cpu(); where the old scheme was a cliff-edge throttle on idle scanning, this introduces a more gradual approach. Instead of stopping to scan entirely, we limit how many CPUs we scan. Initial benchmarks show that it mostly recovers hackbench while not hurting anything else, except Mason's schbench, but not as bad as the old thing. It also appears to recover the tbench high-end, which also suffered like hackbench. Tested-by:
Matt Fleming <matt@codeblueprint.co.uk> Signed-off-by:
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Peter Zijlstra authored
commit c743f0a5 upstream. More users for for_each_cpu_wrap() have appeared. Promote the construct to generic cpumask interface. The implementation is slightly modified to reduce arguments. Signed-off-by:
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Paolo Abeni authored
commit 236222d3 upstream. According to the Intel datasheet, the REP MOVSB instruction exposes a pretty heavy setup cost (50 ticks), which hurts short string copy operations. This change tries to avoid this cost by calling the explicit loop available in the unrolled code for strings shorter than 64 bytes. The 64 bytes cutoff value is arbitrary from the code logic point of view - it has been selected based on measurements, as the largest value that still ensures a measurable gain. Micro benchmarks of the __copy_from_user() function with lengths in the [0-63] range show this performance gain (shorter the string, larger the gain): - in the [55%-4%] range on Intel Xeon(R) CPU E5-2690 v4 - in the [72%-9%] range on Intel Core i7-4810MQ Other tested CPUs - namely Intel Atom S1260 and AMD Opteron 8216 - show no difference, because they do not expose the ERMS feature bit. Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Acked-by:
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Nicholas Piggin authored
commit 67d20418 upstream. Fixes: a7cd88da ("powerpc/powernv: Move CPU-Offline idle state invocation from smp.c to idle.c") Cc: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by:
Nicholas Piggin <npiggin@gmail.com> Acked-by:
Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Jarkko Sakkinen authored
commit 13b47cfc upstream. While cleaning up sysfs callback that prints EK we discovered a kernel memory leak. This commit fixes the issue by zeroing the buffer used for TPM command/response. The leak happen when we use either tpm_vtpm_proxy, tpm_ibmvtpm or xen-tpmfront. Fixes: 08837438 ("TPM: sysfs functions consolidation") Reported-by:
Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Tested-by:
Stefan Berger <stefanb@linux.vnet.ibm.com> Signed-off-by:
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by:
James Morris <james.l.morris@oracle.com> Signed-off-by:
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Josh Zimmerman authored
commit d1bd4a79 upstream. If a TPM2 loses power without a TPM2_Shutdown command being issued (a "disorderly reboot"), it may lose some state that has yet to be persisted to NVRam, and will increment the DA counter. After the DA counter gets sufficiently large, the TPM will lock the user out. NOTE: This only changes behavior on TPM2 devices. Since TPM1 uses sysfs, and sysfs relies on implicit locking on chip->ops, it is not safe to allow this code to run in TPM1, or to add sysfs support to TPM2, until that locking is made explicit. Signed-off-by:
Josh Zimmerman <joshz@google.com> Fixes: 74d6b3ce ("tpm: fix suspend/resume paths for TPM 2.0") Reviewed-by:
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Josh Zimmerman authored
commit f77af151 upstream. The TPM class has some common shutdown code that must be executed for all drivers. This adds some needed functionality for that. Signed-off-by:
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Andreas Gruenbacher authored
commit 961ae1d8 upstream. Before commit 88ffbf3e "GFS2: Use resizable hash table for glocks", glocks were freed via call_rcu to allow reading the glock hashtable locklessly using rcu. This was then changed to free glocks immediately, which made reading the glock hashtable unsafe. Bring back the original code for freeing glocks via call_rcu. Signed-off-by:
Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by:
Bob Peterson <rpeterso@redhat.com> Signed-off-by:
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Jiahau Chang authored
commit dec08194 upstream. For AMD Promontory xHCI host, although you can disable USB 2.0 ports in BIOS settings, those ports will be enabled anyway after you remove a device on that port and re-plug it in again. It's a known limitation of the chip. As a workaround we can clear the PORT_WAKE_BITS. This will disable wake on connect, disconnect and overcurrent on AMD Promontory USB2 ports [checkpatch cleanup and commit message reword -Mathias] Cc: Tsai Nicholas <nicholas.tsai@amd.com> Signed-off-by:
Jiahau Chang <Lars_Chang@asmedia.com.tw> Signed-off-by:
Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by:
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Bjørn Mork authored
commit 996fab55 upstream. A new Sierra Wireless EM7305 device ID used in a Toshiba laptop. Reported-by:
Petr Kloc <petr_kloc@yahoo.com> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Johan Hovold authored
commit 8fb060da upstream. Add two Longcheer device-id entries which specifically enables a Telewell TW-3G HSPA+ branded modem (0x9801). Reported-by:
Teemu Likonen <tlikonen@iki.fi> Reported-by:
Lars Melin <larsm17@gmail.com> Tested-by:
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Johan Hovold authored
commit e271b2c9 upstream. Make sure to release any OF device-node reference taken when creating the USB device. Note that we currently do not hold a reference to the root hub device-tree node (i.e. the parent controller node). Fixes: 69bec725 ("USB: core: let USB device know device node") Acked-by:
Peter Chen <peter.chen@nxp.com> Signed-off-by:
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Benjamin Herrenschmidt authored
commit 7cf916bd upstream. The current definition is wrong. This breaks my upcoming Aspeed virtual hub driver. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Devin Heitmueller authored
commit 6836796d upstream. The USB core and sysfs will attempt to enumerate certain parameters which are unsupported by the au0828 - causing inconsistent behavior and sometimes causing the chip to reset. Avoid making these calls. This problem manifested as intermittent cases where the au8522 would be reset on analog video startup, in particular when starting up ALSA audio streaming in parallel - the sysfs entries created by snd-usb-audio on streaming startup would result in unsupported control messages being sent during tuning which would put the chip into an unknown state. Signed-off-by:
Devin Heitmueller <dheitmueller@kernellabs.com> Signed-off-by:
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Michael Grzeschik authored
commit b3b51417 upstream. The usbip stack dynamically allocates the transfer_buffer and setup_packet of each urb that got generated by the tcp to usb stub code. As these pointers are always used only once we will set them to NULL after use. This is done likewise to the free_urb code in vudc_dev.c. This patch fixes double kfree situations where the usbip remote side added the URB_FREE_BUFFER. Signed-off-by:
Michael Grzeschik <m.grzeschik@pengutronix.de> Acked-by:
Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by:
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Jeremie Rapin authored
commit fd90f73a upstream. Added the USB serial device ID for the CEL ZigBee EM3588 radio stick. Signed-off-by:
Jeremie Rapin <rapinj@gmail.com> Acked-by:
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Felipe Balbi authored
commit 04fb365c upstream. %p will leak kernel pointers, so let's not expose the information on dmesg and instead use %pK. %pK will only show the actual addresses if explicitly enabled under /proc/sys/kernel/kptr_restrict. Acked-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
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Boris Pismenny authored
commit 5ecce4c9 upstream. The ib_uverbs_create_ah() ind ib_uverbs_modify_qp() calls receive the port number from user input as part of its attributes and assumes it is valid. Down on the stack, that parameter is used to access kernel data structures. If the value is invalid, the kernel accesses memory it should not. To prevent this, verify the port number before using it. BUG: KASAN: use-after-free in ib_uverbs_create_ah+0x6d5/0x7b0 Read of size 4 at addr ffff880018d67ab8 by task syz-executor/313 BUG: KASAN: slab-out-of-bounds in modify_qp.isra.4+0x19d0/0x1ef0 Read of size 4 at addr ffff88006c40ec58 by task syz-executor/819 Fixes: 67cdb40c ("[IB] uverbs: Implement more commands") Fixes: 189aba99 ("IB/uverbs: Extend modify_qp and support packet pacing") Cc: Yevgeny Kliteynik <kliteyn@mellanox.com> Cc: Tziporet Koren <tziporet@mellanox.com> Cc: Alex Polak <alexpo@mellanox.com> Signed-off-by:
Boris Pismenny <borisp@mellanox.com> Signed-off-by:
Leon Romanovsky <leon@kernel.org> Signed-off-by:
Doug Ledford <dledford@redhat.com> Signed-off-by:
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Adrian Salido authored
commit 62655397 upstream. The driver_override implementation is susceptible to race condition when different threads are reading vs storing a different driver override. Add locking to avoid race condition. Fixes: 3d713e0e ("driver core: platform: add device binding path 'driver_override'") Cc: stable@vger.kernel.org Signed-off-by:
Adrian Salido <salidoa@google.com> Signed-off-by:
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- 02 Jul, 2017 4 commits
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Linus Torvalds authored
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Sylvain 'ythier' Hitier authored
Signed-off-by:
Sylvain 'ythier' Hitier <sylvain.hitier@gmail.com> Signed-off-by:
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git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds authored
Pull MIPS fixes from Ralf Baechle: "Here's a final round of fixes for 4.12: - Fix misordered instructions in assembly code making kenel startup via UHB unreliable. - Fix special case of MADDF and MADDF emulation. - Fix alignment issue in address calculation in pm-cps on 64 bit. - Fix IRQ tracing & lockdep when rescheduling - Systems with MAARs require post-DMA cache flushes. The reordering fix and the MADDF/MSUBF fix have sat in linux-next for a number of days. The others haven't propagated from my pull tree to linux-next yet but all have survived manual testing and Imagination's automated test system and there are no pending bug reports" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: Avoid accidental raw backtrace MIPS: Perform post-DMA cache flushes on systems with MAARs MIPS: Fix IRQ tracing & lockdep when rescheduling MIPS: pm-cps: Drop manual cache-line alignment of ready_count MIPS: math-emu: Handle zero accumulator case in MADDF and MSUBF separately MIPS: head: Reorder instructions missing a delay slot -
git://git.armlinux.org.uk/~rmk/linux-armLinus Torvalds authored
Pull ARM fix from Russell King: "One final fix for 4.12 - Doug found a boot failure case triggered by requesting a non-even MB vmalloc size" * 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: 8685/1: ensure memblock-limit is pmd-aligned
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- 01 Jul, 2017 5 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fixes from Thomas Gleixner: "Fixlets for x86: - Prevent kexec crash when KASLR is enabled, which was caused by an address calculation bug - Restore the freeing of PUDs on memory hot remove - Correct a negated pointer check in the intel uncore performance monitoring driver - Plug a memory leak in an error exit path in the RDT code" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/intel_rdt: Fix memory leak on mount failure x86/boot/KASLR: Fix kexec crash due to 'virt_addr' calculation bug x86/boot/KASLR: Add checking for the offset of kernel virtual address randomization perf/x86/intel/uncore: Fix wrong box pointer check x86/mm/hotplug: Fix BUG_ON() after hot-remove by not freeing PUD -
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull perf fix from Thomas Gleixner: "The last fix for perf for this cycles: - Prevent a segfault when kernel.kptr_restrict=2 is set by avoiding a null pointer dereference" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf machine: Fix segfault for kernel.kptr_restrict=2 -
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlLinus Torvalds authored
Pull pinctrl fix from Linus Walleij: "Brian noticed that this regression has not got a proper fix for the entire merge window and consequently we need to revert the offending commit. It's part of the RT-mainstream work, the dance goes like this, two steps forward, one step back. Summary: - A last fix for v4.12, an IRQ problem reported early in the merge window appears not to have been properly fixed, so the offending commit will be reverted and we will find the proper fix for v4.13. Hopefully" * tag 'pinctrl-v4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: Revert "pinctrl: rockchip: avoid hardirq-unsafe functions in irq_chip" -
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpioLinus Torvalds authored
Pull last minute fixes for GPIO from Linus Walleij: - Fix another ACPI problem with broken BIOSes. - Filter out the right GPIO events, making a very user-visible bug go away. * tag 'gpio-v4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio: acpi: Skip _AEI entries without a handler rather then aborting the scan gpiolib: fix filtering out unwanted events
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-traceLinus Torvalds authored
Pull last-minute tracing fixes from Steven Rostedt: "Two fixes: One is for a crash when using the :mod: trace probe command into stack_trace_filter. This bug was introduced during the last merge window. The other was there forever. It's a small bug that makes it impossible to name a module function for kprobes when the module starts with a digit" * tag 'trace-v4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing/kprobes: Allow to create probe with a module name starting with a digit ftrace: Fix regression with module command in stack_trace_filter
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- 30 Jun, 2017 1 commit
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Zack Weinberg authored
uapi/linux/a.out.h uses a number of predefined macros that are deprecated because they're in the application namespace (e.g. '#ifdef linux' instead of '#ifdef __linux__'). This patch either corrects or just removes them if they are not applicable to Linux. The primary reason this is worth bothering to fix, considering how obsolete a.out binary support is, is that the GCC build process considers this such a severe error that it will copy the header into a private directory and change the macro names, which causes future updates to the header to be masked. This header probably doesn't get updated very often anymore, but it is the _only_ uapi header that gets this treatment, so IMHO it is worth patching just to drive that number all the way to zero. Signed-off-by:
Zack Weinberg <zackw@panix.com> [hch: removed dead conditionals] Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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