- 02 Jan, 2018 8 commits
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Johan Hovold authored
commit bc6476d6 upstream. Fix child-node lookup during probe, which ended up searching the whole device tree depth-first starting at the parent rather than just matching on its children. To make things worse, the parent codec node was also prematurely freed. Fixes: 4d50934a ("ASoC: da7218: Add da7218 codec driver") Signed-off-by:
Johan Hovold <johan@kernel.org> Acked-by:
Adam Thomson <Adam.Thomson.Opensource@diasemi.com> Signed-off-by:
Mark Brown <broonie@kernel.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Ben Hutchings authored
commit 50dd2ea8 upstream. The checks for whether another region/block header could be present are subtracting the size from the current offset. Obviously we should instead subtract the offset from the size. The checks for whether the region/block data fit in the file are adding the data size to the current offset and header size, without checking for integer overflow. Rearrange these so that overflow is impossible. Signed-off-by:
Ben Hutchings <ben.hutchings@codethink.co.uk> Acked-by:
Charles Keepax <ckeepax@opensource.cirrus.com> Tested-by:
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Steve Wise authored
commit f55688c4 upstream. If the RECV CQE is in error, ignore the MSN check. This was causing recvs that were flushed into the sw cq to be completed with the wrong status (BAD_MSN instead of FLUSHED). Signed-off-by:
Steve Wise <swise@opengridcomputing.com> Signed-off-by:
Jason Gunthorpe <jgg@mellanox.com> Signed-off-by:
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Steven Rostedt (VMware) authored
commit 45d8b80c upstream. Two info bits were added to the "commit" part of the ring buffer data page when returned to be consumed. This was to inform the user space readers that events have been missed, and that the count may be stored at the end of the page. What wasn't handled, was the splice code that actually called a function to return the length of the data in order to zero out the rest of the page before sending it up to user space. These data bits were returned with the length making the value negative, and that negative value was not checked. It was compared to PAGE_SIZE, and only used if the size was less than PAGE_SIZE. Luckily PAGE_SIZE is unsigned long which made the compare an unsigned compare, meaning the negative size value did not end up causing a large portion of memory to be randomly zeroed out. Fixes: 66a8cb95 ("ring-buffer: Add place holder recording of dropped events") Signed-off-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by:
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Jing Xia authored
commit 24f2aaf9 upstream. Double free of the ring buffer happens when it fails to alloc new ring buffer instance for max_buffer if TRACER_MAX_TRACE is configured. The root cause is that the pointer is not set to NULL after the buffer is freed in allocate_trace_buffers(), and the freeing of the ring buffer is invoked again later if the pointer is not equal to Null, as: instance_mkdir() |-allocate_trace_buffers() |-allocate_trace_buffer(tr, &tr->trace_buffer...) |-allocate_trace_buffer(tr, &tr->max_buffer...) // allocate fail(-ENOMEM),first free // and the buffer pointer is not set to null |-ring_buffer_free(tr->trace_buffer.buffer) // out_free_tr |-free_trace_buffers() |-free_trace_buffer(&tr->trace_buffer); //if trace_buffer is not null, free again |-ring_buffer_free(buf->buffer) |-rb_free_cpu_buffer(buffer->buffers[cpu]) // ring_buffer_per_cpu is null, and // crash in ring_buffer_per_cpu->pages Link: http://lkml.kernel.org/r/20171226071253.8968-1-chunyan.zhang@spreadtrum.com Fixes: 737223fb ("tracing: Consolidate buffer allocation code") Signed-off-by:
Jing Xia <jing.xia@spreadtrum.com> Signed-off-by:
Chunyan Zhang <chunyan.zhang@spreadtrum.com> Signed-off-by:
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Steven Rostedt (VMware) authored
commit 4397f045 upstream. Jing Xia and Chunyan Zhang reported that on failing to allocate part of the tracing buffer, memory is freed, but the pointers that point to them are not initialized back to NULL, and later paths may try to free the freed memory again. Jing and Chunyan fixed one of the locations that does this, but missed a spot. Link: http://lkml.kernel.org/r/20171226071253.8968-1-chunyan.zhang@spreadtrum.com Fixes: 737223fb ("tracing: Consolidate buffer allocation code") Reported-by:
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Steven Rostedt (VMware) authored
commit 6b7e633f upstream. The ring_buffer_read_page() takes care of zeroing out any extra data in the page that it returns. There's no need to zero it out again from the consumer. It was removed from one consumer of this function, but read_buffers_splice_read() did not remove it, and worse, it contained a nasty bug because of it. Fixes: 2711ca23 ("ring-buffer: Move zeroing out excess in page to ring buffer code") Signed-off-by:
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Greg Kroah-Hartman authored
When building objtool, we get the warning: warning: objtool: x86 instruction decoder differs from kernel That's due to commit 2816c045 which was commit 12a78d43 upstream that modified arch/x86/lib/x86-opcode-map.txt without also updating the objtool copy. The objtool copy was updated in a much larger patch upstream, but we don't need all of that here, so just update the single file. If this gets too annoying, I'll just end up doing what we did for 4.14 and backport the whole series to keep this from happening again, but as this seems to be rare in the 4.9-stable series, this single patch should be fine. Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by:
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- 29 Dec, 2017 23 commits
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Greg Kroah-Hartman authored
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Ben Hutchings authored
An UNKNOWN_VALUE is not supposed to be derived from a pointer, unless pointer leaks are allowed. Therefore, states_equal() must not treat a state with a pointer in a register as "equal" to a state with an UNKNOWN_VALUE in that register. This was fixed differently upstream, but the code around here was largely rewritten in 4.14 by commit f1174f77 "bpf/verifier: rework value tracking". The bug can be detected by the bpf/verifier sub-test "pointer/scalar confusion in state equality check (way 1)". Signed-off-by:
Ben Hutchings <ben@decadent.org.uk> Cc: Edward Cree <ecree@solarflare.com> Cc: Jann Horn <jannh@google.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net>
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Yelena Krivosheev authored
commit 2eecb2e0 upstream. There are few reasons in mvneta_rx_swbm() function when received packet is dropped. mvneta_rx_error() should be called only if error bit [16] is set in rx descriptor. [gregory.clement@free-electrons.com: add fixes tag] Fixes: dc35a10f ("net: mvneta: bm: add support for hardware buffer management") Signed-off-by:
Yelena Krivosheev <yelena@marvell.com> Tested-by:
Dmitri Epshtein <dima@marvell.com> Signed-off-by:
Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Yelena Krivosheev authored
commit ca5902a6 upstream. When adding the RX queue association with each CPU, a typo was made in the mvneta_cleanup_rxqs() function. This patch fixes it. [gregory.clement@free-electrons.com: add commit log and fixes tag] Fixes: 2dcf75e2 ("net: mvneta: Associate RX queues with each CPU") Signed-off-by:
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Yelena Krivosheev authored
commit 4423c18e upstream. When port connect to PHY in polling mode (with poll interval 1 sec), port and phy link status must be synchronize in order don't loss link change event. [gregory.clement@free-electrons.com: add fixes tag] Fixes: c5aff182 ("net: mvneta: driver for Marvell Armada 370/XP network unit") Signed-off-by:
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Dan Williams authored
commit 19deaa21 upstream. The alignment checks at pfn driver startup fail to properly account for the 'start_pad' in the case where the namespace is misaligned relative to its internal alignment. This is typically triggered in 1G aligned namespace, but could theoretically trigger with small namespace alignments. When this triggers the kernel reports messages of the form: dax2.1: bad offset: 0x3c000000 dax disabled align: 0x40000000 Fixes: 1ee6667c ("libnvdimm, pfn, dax: fix initialization vs autodetect...") Reported-by:
Jane Chu <jane.chu@oracle.com> Signed-off-by:
Dan Williams <dan.j.williams@intel.com> Signed-off-by:
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Ravi Bangoria authored
commit f41d84dd upstream. It's theoretically possible that branch instructions recorded in BHRB (Branch History Rolling Buffer) entries have already been unmapped before they are processed by the kernel. Hence, trying to dereference such memory location will result in a crash. eg: Unable to handle kernel paging request for data at address 0xd000000019c41764 Faulting instruction address: 0xc000000000084a14 NIP [c000000000084a14] branch_target+0x4/0x70 LR [c0000000000eb828] record_and_restart+0x568/0x5c0 Call Trace: [c0000000000eb3b4] record_and_restart+0xf4/0x5c0 (unreliable) [c0000000000ec378] perf_event_interrupt+0x298/0x460 [c000000000027964] performance_monitor_exception+0x54/0x70 [c000000000009ba4] performance_monitor_common+0x114/0x120 Fix it by deferefencing the addresses safely. Fixes: 69123184 ("powerpc/perf: Fix setting of "to" addresses for BHRB") Suggested-by:
Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by:
Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Reviewed-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Chen-Yu Tsai authored
commit 61d2f2a0 upstream. Our MMC host driver now issues a reset, instead of just deasserting the reset control, since commit c34eda69 ("mmc: sunxi: Reset the device at probe time"). The sun9i-mmc clock driver does not support this, and will fail, which results in MMC not probing. This patch implements the reset callback by asserting the reset control, then deasserting it after a small delay. Fixes: 7a6fca87 ("clk: sunxi: Add driver for A80 MMC config clocks/resets") Signed-off-by:
Chen-Yu Tsai <wens@csie.org> Acked-by:
Philipp Zabel <p.zabel@pengutronix.de> Acked-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/20171218035751.20661-1-wens@csie.org Signed-off-by:
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Paolo Bonzini authored
commit fae1a3e7 upstream. rsm_load_state_64() and rsm_enter_protected_mode() load CR3, then CR4 & ~PCIDE, then CR0, then CR4. However, setting CR4.PCIDE fails if CR3[11:0] != 0. It's probably easier in the long run to replace rsm_enter_protected_mode() with an emulator callback that sets all the special registers (like KVM_SET_SREGS would do). For now, set the PCID field of CR3 only after CR4.PCIDE is 1. Reported-by:
Laszlo Ersek <lersek@redhat.com> Tested-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
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Wanpeng Li authored
commit d73235d1 upstream. *** Guest State *** CR0: actual=0x0000000000000030, shadow=0x0000000060000010, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002050, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x0000000000000000 RIP = 0x0000000000000000 RFLAGS=0x00000000 DR7 = 0x0000000000000400 ^^^^^^^^^^ The failed vmentry is triggered by the following testcase when ept=Y: #include <unistd.h> #include <sys/syscall.h> #include <string.h> #include <stdint.h> #include <linux/kvm.h> #include <fcntl.h> #include <sys/ioctl.h> long r[5]; int main() { r[2] = open("/dev/kvm", O_RDONLY); r[3] = ioctl(r[2], KVM_CREATE_VM, 0); r[4] = ioctl(r[3], KVM_CREATE_VCPU, 7); struct kvm_regs regs = { .rflags = 0, }; ioctl(r[4], KVM_SET_REGS, ®s); ioctl(r[4], KVM_RUN, 0); } X86 RFLAGS bit 1 is fixed set, userspace can simply clearing bit 1 of RFLAGS with KVM_SET_REGS ioctl which results in vmentry fails. This patch fixes it by oring X86_EFLAGS_FIXED during ioctl. Suggested-by:
Jim Mattson <jmattson@google.com> Reviewed-by:
David Hildenbrand <david@redhat.com> Reviewed-by:
Quan Xu <quan.xu0@gmail.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Jim Mattson <jmattson@google.com> Signed-off-by:
Wanpeng Li <wanpeng.li@hotmail.com> Signed-off-by:
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Mika Westerberg authored
commit d2b3c353 upstream. Guenter Roeck reported an interrupt storm on a prototype system which is based on Cyan Chromebook. The root cause turned out to be a incorrectly configured pin that triggers spurious interrupts. This will be fixed in coreboot but currently we need to prevent the interrupt storm from happening by masking all interrupts (but not GPEs) on those systems. Link: https://bugzilla.kernel.org/show_bug.cgi?id=197953 Fixes: bcb48cca ("pinctrl: cherryview: Do not mask all interrupts in probe") Reported-and-tested-by:
Guenter Roeck <linux@roeck-us.net> Reported-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by:
Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Ricardo Ribalda Delgado authored
commit 5a1314fa upstream. When the core is configured in C_SPI_MODE > 0, it integrates a lookup table that automatically configures the core in dual or quad mode based on the command (first byte on the tx fifo). Unfortunately, that list mode_?_memoy_*.mif does not contain all the supported commands by the flash. Since 4.14 spi-nor automatically tries to probe the flash using SFDP (command 0x5a), and that command is not part of the list_mode table. Whit the right combination of C_SPI_MODE and C_SPI_MEMORY this leads into a stall that can only be recovered with a soft rest. This patch detects this kind of stall and returns -EIO to the caller on those commands. spi-nor can handle this error properly: m25p80 spi0.0: Detected stall. Check C_SPI_MODE and C_SPI_MEMORY. 0x21 0x2404 m25p80 spi0.0: SPI transfer failed: -5 spi_master spi0: failed to transfer one message from queue m25p80 spi0.0: s25sl064p (8192 Kbytes) Signed-off-by:
Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by:
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Helge Deller authored
commit bcf3f175 upstream. Diva GSP card has built-in serial AUX port and ATI graphic card which simply don't work and which both don't have external connectors. User Guides even mention that those devices shouldn't be used. So, prevent that Linux drivers try to enable those devices. Signed-off-by:
Helge Deller <deller@gmx.de> Signed-off-by:
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Rafael J. Wysocki authored
commit 5839ee73 upstream. It is incorrect to call pci_restore_state() for devices in low-power states (D1-D3), as that involves the restoration of MSI setup which requires MMIO to be operational and that is only the case in D0. However, pci_pm_thaw_noirq() may do that if the driver's "freeze" callbacks put the device into a low-power state, so fix it by making it force devices into D0 via pci_set_power_state() instead of trying to "update" their power state which is pointless. Fixes: e60514bd (PCI/PM: Restore the status of PCI devices across hibernation) Reported-by:
Thomas Gleixner <tglx@linutronix.de> Reported-by:
Maarten Lankhorst <dev@mblankhorst.nl> Tested-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by:
Bjorn Helgaas <bhelgaas@google.com> Signed-off-by:
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Takashi Iwai authored
commit 5a15f289 upstream. The commit 89b89d12 ("ALSA: usb-audio: Add check return value for usb_string()") added the check of the return value from snd_usb_copy_string_desc(), which is correct per se, but it introduced a regression. In the original code, either the "Clock Source", "Playback Source" or "Capture Source" suffix is added after the terminal string, while the commit changed it to add the suffix only when get_term_name() is failing. It ended up with an incorrect ctl name like "PCM" instead of "PCM Capture Source". Also, even the original code has a similar bug: when the ctl name is generated from snd_usb_copy_string_desc() for the given iSelector, it also doesn't put the suffix. This patch addresses these issues: the suffix is added always when no static mapping is found. Also the patch tries to put more comments and cleans up the if/else block for better readability in order to avoid the same pitfall again. Fixes: 89b89d12 ("ALSA: usb-audio: Add check return value for usb_string()") Reported-and-tested-by:
Mauro Santos <registo.mailling@gmail.com> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Jussi Laako authored
commit 866f7ed7 upstream. Adds VID:PID of Esoteric D-05X to the TEAC device id's. Renames the is_teac_50X_dac() function to is_teac_dsd_dac() to cover broader device family from the same corporation sharing the same USB audio implementation. Signed-off-by:
Jussi Laako <jussi@sonarnerd.net> Signed-off-by:
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Takashi Iwai authored
commit c1cfd902 upstream. The rawmidi also allows to obtaining the information via ioctl of ctl API. It means that user can issue an ioctl to the rawmidi device even when it's being removed as long as the control device is present. Although the code has some protection via the global register_mutex, its range is limited to the search of the corresponding rawmidi object, and the mutex is already unlocked at accessing the rawmidi object. This may lead to a use-after-free. For avoiding it, this patch widens the application of register_mutex to the whole snd_rawmidi_info_select() function. We have another mutex per rawmidi object, but this operation isn't very hot path, so it shouldn't matter from the performance POV. Signed-off-by:
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Johan Hovold authored
commit 85e9b13c upstream. Fix child-node lookup during probe, which ended up searching the whole device tree depth-first starting at the parent rather than just matching on its children. To make things worse, the parent node was prematurely freed, while the child node was leaked. Note that the CONFIG_OF compile guard can be removed as of_get_child_by_name() provides a !CONFIG_OF implementation which always fails. Fixes: 37e13cec ("mfd: Add support for Device Tree to twl6040") Fixes: ca2cad6a ("mfd: Fix twl6040 build failure") Signed-off-by:
Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by:
Lee Jones <lee.jones@linaro.org> Signed-off-by:
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Johan Hovold authored
commit 0a423772 upstream. A helper purported to look up a child node based on its name was using the wrong of-helper and ended up prematurely freeing the parent of-node while leaking any matching node. To make things worse, any matching node would not even necessarily be a child node as the whole device tree was searched depth-first starting at the parent. Fixes: 019a7e6b ("mfd: twl4030-audio: Add DT support") Signed-off-by:
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Jon Hunter authored
commit 15d83748 upstream. On the Tegra124 Nyan-Big chromebook the very first SPI message sent to the EC is failing. The Tegra SPI driver configures the SPI chip-selects to be active-high by default (and always has for many years). The EC SPI requires an active-low chip-select and so the Tegra chip-select is reconfigured to be active-low when the EC SPI driver calls spi_setup(). The problem is that if the first SPI message to the EC is sent too soon after reconfiguring the SPI chip-select, it fails. The EC SPI driver prevents back-to-back SPI messages being sent too soon by keeping track of the time the last transfer was sent via the variable 'last_transfer_ns'. To prevent the very first transfer being sent too soon, initialise the 'last_transfer_ns' variable after calling spi_setup() and before sending the first SPI message. Signed-off-by:
Jon Hunter <jonathanh@nvidia.com> Reviewed-by:
Brian Norris <briannorris@chromium.org> Reviewed-by:
Douglas Anderson <dianders@chromium.org> Acked-by:
Benson Leung <bleung@chromium.org> Signed-off-by:
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Sebastian Andrzej Siewior authored
commit 9abffc6f upstream. mcryptd_enqueue_request() grabs the per-CPU queue struct and protects access to it with disabled preemption. Then it schedules a worker on the same CPU. The worker in mcryptd_queue_worker() guards access to the same per-CPU variable with disabled preemption. If we take CPU-hotplug into account then it is possible that between queue_work_on() and the actual invocation of the worker the CPU goes down and the worker will be scheduled on _another_ CPU. And here the preempt_disable() protection does not work anymore. The easiest thing is to add a spin_lock() to guard access to the list. Another detail: mcryptd_queue_worker() is not processing more than MCRYPTD_BATCH invocation in a row. If there are still items left, then it will invoke queue_work() to proceed with more later. *I* would suggest to simply drop that check because it does not use a system workqueue and the workqueue is already marked as "CPU_INTENSIVE". And if preemption is required then the scheduler should do it. However if queue_work() is used then the work item is marked as CPU unbound. That means it will try to run on the local CPU but it may run on another CPU as well. Especially with CONFIG_DEBUG_WQ_FORCE_RR_CPU=y. Again, the preempt_disable() won't work here but lock which was introduced will help. In order to keep work-item on the local CPU (and avoid RR) I changed it to queue_work_on(). Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Dan Williams authored
commit adf68957 upstream. Integration testing with a BIOS that generates injected health event notifications fails to communicate those events to userspace. The nfit driver neglects to link the ACPI DIMM device with the necessary driver data so acpi_nvdimm_notify() fails this lookup: nfit_mem = dev_get_drvdata(dev); if (nfit_mem && nfit_mem->flags_attr) sysfs_notify_dirent(nfit_mem->flags_attr); Add the necessary linkage when installing the notification handler and clean it up when the nfit driver instance is torn down. Cc: Toshi Kani <toshi.kani@hpe.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Fixes: ba9c8dd3 ("acpi, nfit: add dimm device notification support") Reported-by:
Daniel Osawa <daniel.k.osawa@intel.com> Tested-by:
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Takashi Iwai authored
commit bb82e0b4 upstream. The commit f6f82851 ("pstore: pass allocated memory region back to caller") changed the check of the return value from erst_read() in erst_reader() in the following way: if (len == -ENOENT) goto skip; - else if (len < 0) { - rc = -1; + else if (len < sizeof(*rcd)) { + rc = -EIO; goto out; This introduced another bug: since the comparison with sizeof() is cast to unsigned, a negative len value doesn't hit any longer. As a result, when an error is returned from erst_read(), the code falls through, and it may eventually lead to some weird thing like memory corruption. This patch adds the negative error value check more explicitly for addressing the issue. Fixes: f6f82851 (pstore: pass allocated memory region back to caller) Tested-by:
Jerry Tang <jtang@suse.com> Signed-off-by:
Kees Cook <keescook@chromium.org> Reviewed-by:
Borislav Petkov <bp@suse.de> Signed-off-by:
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- 25 Dec, 2017 9 commits
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Greg Kroah-Hartman authored
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Guenter Roeck authored
commit 9d262d95 upstream. sparc32:allmodconfig fails to build with the following error. ERROR: "vac_cache_size" [drivers/infiniband/sw/rxe/rdma_rxe.ko] undefined! Fixes: cb886455 ("infiniband: Fix alignment of mmap cookies ...") Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Cc: Doug Ledford <dledford@redhat.com> Signed-off-by:
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Daniel Borkmann authored
From: Jann Horn <jannh@google.com> [ Upstream commit 95a762e2 ] Distinguish between BPF_ALU64|BPF_MOV|BPF_K (load 32-bit immediate, sign-extended to 64-bit) and BPF_ALU|BPF_MOV|BPF_K (load 32-bit immediate, zero-padded to 64-bit); only perform sign extension in the first case. Starting with v4.14, this is exploitable by unprivileged users as long as the unprivileged_bpf_disabled sysctl isn't set. Debian assigned CVE-2017-16995 for this issue. v3: - add CVE number (Ben Hutchings) Fixes: 48461135 ("bpf: allow access into map value arrays") Signed-off-by:
Jann Horn <jannh@google.com> Acked-by:
Edward Cree <ecree@solarflare.com> Signed-off-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Signed-off-by:
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Daniel Borkmann authored
From: Jann Horn <jannh@google.com> Reject programs that compute wildly out-of-bounds stack pointers. Otherwise, pointers can be computed with an offset that doesn't fit into an `int`, causing security issues in the stack memory access check (as well as signed integer overflow during offset addition). This is a fix specifically for the v4.9 stable tree because the mainline code looks very different at this point. Fixes: 7bca0a97 ("bpf: enhance verifier to understand stack pointer arithmetic") Signed-off-by:
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Daniel Borkmann authored
From: Alexei Starovoitov <ast@fb.com> [ Upstream commit c131187d ] when the verifier detects that register contains a runtime constant and it's compared with another constant it will prune exploration of the branch that is guaranteed not to be taken at runtime. This is all correct, but malicious program may be constructed in such a way that it always has a constant comparison and the other branch is never taken under any conditions. In this case such path through the program will not be explored by the verifier. It won't be taken at run-time either, but since all instructions are JITed the malicious program may cause JITs to complain about using reserved fields, etc. To fix the issue we have to track the instructions explored by the verifier and sanitize instructions that are dead at run time with NOPs. We cannot reject such dead code, since llvm generates it for valid C code, since it doesn't do as much data flow analysis as the verifier does. Fixes: 17a52670 ("bpf: verifier (add verifier core)") Signed-off-by:
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Daniel Borkmann authored
From: Alexei Starovoitov <ast@fb.com> [ Upstream commit 8041902d ] convert_ctx_accesses() replaces single bpf instruction with a set of instructions. Adjust corresponding insn_aux_data while patching. It's needed to make sure subsequent 'for(all insn)' loops have matching insn and insn_aux_data. Signed-off-by:
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Greg Kroah-Hartman authored
This reverts commit 7336f548 which is commit a0085f25 upstream. It causes problems with working systems, as noted by a number of the ChromeOS developers. Cc: Sukumar Ghorai <sukumar.ghorai@intel.com> Cc: Amit K Bag <amit.k.bag@intel.com> Cc: Oliver Neukum <oneukum@suse.com> Cc: Marcel Holtmann <marcel@holtmann.org> Cc: Matthias Kaehlcke <mka@chromium.org> Reported-by:
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Peter Hutterer authored
commit bff5bf9d upstream. Sending the switch state change twice within the same frame is invalid evdev protocol and only works if the client handles keys immediately as well. Processing events immediately is incorrect, it forces a fake order of events that does not exist on the device. Recent versions of libinput changed to only process the device state and SYN_REPORT time, so now the key event is lost. https://bugs.freedesktop.org/show_bug.cgi?id=104041Signed-off-by:
Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by:
Darren Hart (VMware) <dvhart@infradead.org> Signed-off-by:
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Aleksandar Markovic authored
commit 409fcace upstream. Fix final phase of <CLASS|MADDF|MSUBF|MAX|MIN|MAXA|MINA>.<D|S> emulation. Provide proper generation of SIGFPE signal and updating debugfs FP exception stats in cases of any exception flags set in preceding phases of emulation. CLASS.<D|S> instruction may generate "Unimplemented Operation" FP exception. <MADDF|MSUBF>.<D|S> instructions may generate "Inexact", "Unimplemented Operation", "Invalid Operation", "Overflow", and "Underflow" FP exceptions. <MAX|MIN|MAXA|MINA>.<D|S> instructions can generate "Unimplemented Operation" and "Invalid Operation" FP exceptions. The proper final processing of the cases when any FP exception flag is set is achieved by replacing "break" statement with "goto copcsr" statement. With such solution, this patch brings the final phase of emulation of the above instructions consistent with the one corresponding to the previously implemented emulation of other related FPU instructions (ADD, SUB, etc.). Fixes: 38db37ba ("MIPS: math-emu: Add support for the MIPS R6 CLASS FPU instruction") Fixes: e24c3bec ("MIPS: math-emu: Add support for the MIPS R6 MADDF FPU instruction") Fixes: 83d43305 ("MIPS: math-emu: Add support for the MIPS R6 MSUBF FPU instruction") Fixes: a79f5f9b ("MIPS: math-emu: Add support for the MIPS R6 MAX{, A} FPU instruction") Fixes: 4e9561b2 ("MIPS: math-emu: Add support for the MIPS R6 MIN{, A} FPU instruction") Signed-off-by:
Aleksandar Markovic <aleksandar.markovic@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Douglas Leung <douglas.leung@mips.com> Cc: Goran Ferenc <goran.ferenc@mips.com> Cc: "Maciej W. Rozycki" <macro@imgtec.com> Cc: Miodrag Dinic <miodrag.dinic@mips.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Petar Jovanovic <petar.jovanovic@mips.com> Cc: Raghu Gandham <raghu.gandham@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17581/Signed-off-by:
James Hogan <jhogan@kernel.org> Signed-off-by:
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