- 27 Nov, 2014 17 commits
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Rabin Vincent authored
commit e30f53aa upstream. On a !PREEMPT kernel, attempting to use trace-cmd results in a soft lockup: # trace-cmd record -e raw_syscalls:* -F false NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [trace-cmd:61] ... Call Trace: [<ffffffff8105b580>] ? __wake_up_common+0x90/0x90 [<ffffffff81092e25>] wait_on_pipe+0x35/0x40 [<ffffffff810936e3>] tracing_buffers_splice_read+0x2e3/0x3c0 [<ffffffff81093300>] ? tracing_stats_read+0x2a0/0x2a0 [<ffffffff812d10ab>] ? _raw_spin_unlock+0x2b/0x40 [<ffffffff810dc87b>] ? do_read_fault+0x21b/0x290 [<ffffffff810de56a>] ? handle_mm_fault+0x2ba/0xbd0 [<ffffffff81095c80>] ? trace_event_buffer_lock_reserve+0x40/0x80 [<ffffffff810951e2>] ? trace_buffer_lock_reserve+0x22/0x60 [<ffffffff81095c80>] ? trace_event_buffer_lock_reserve+0x40/0x80 [<ffffffff8112415d>] do_splice_to+0x6d/0x90 [<ffffffff81126971>] SyS_splice+0x7c1/0x800 [<ffffffff812d1edd>] tracesys_phase2+0xd3/0xd8 The problem is this: tracing_buffers_splice_read() calls ring_buffer_wait() to wait for data in the ring buffers. The buffers are not empty so ring_buffer_wait() returns immediately. But tracing_buffers_splice_read() calls ring_buffer_read_page() with full=1, meaning it only wants to read a full page. When the full page is not available, tracing_buffers_splice_read() tries to wait again with ring_buffer_wait(), which again returns immediately, and so on. Fix this by adding a "full" argument to ring_buffer_wait() which will make ring_buffer_wait() wait until the writer has left the reader's page, i.e. until full-page reads will succeed. Link: http://lkml.kernel.org/r/1415645194-25379-1-git-send-email-rabin@rab.in Fixes: b1169cc6 ("tracing: Remove mock up poll wait function") Signed-off-by:
Rabin Vincent <rabin@rab.in> Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
Luis Henriques <luis.henriques@canonical.com>
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Helge Deller authored
commit 2fe749f5 upstream. Switch over the msgctl, shmat, shmctl and semtimedop syscalls to use the compat layer. The problem was found with the debian procenv package, which called shmctl(0, SHM_INFO, &info); in which the shmctl syscall then overwrote parts of the surrounding areas on the stack on which the info variable was stored and thus lead to a segfault later on. Additionally fix the definition of struct shminfo64 to use unsigned longs like the other architectures. This has no impact on userspace since we only have a 32bit userspace up to now. Signed-off-by:
Helge Deller <deller@gmx.de> Cc: John David Anglin <dave.anglin@bell.net> Signed-off-by:
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Joe Thornber authored
commit 9b460d36 upstream. The walk code was using a 'ro_spine' to hold it's locked btree nodes. But this data structure is designed for the rolling lock scheme, and as such automatically unlocks blocks that are two steps up the call chain. This is not suitable for the simple recursive walk algorithm, which retraces its steps. This code is only used by the persistent array code, which in turn is only used by dm-cache. In order to trigger it you need to have a mapping tree that is more than 2 levels deep; which equates to 8-16 million cache blocks. For instance a 4T ssd with a very small block size of 32k only just triggers this bug. The fix just places the locked blocks on the stack, and stops using the ro_spine altogether. Signed-off-by:
Joe Thornber <ejt@redhat.com> Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
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Tony Lindgren authored
commit 481c7f86 upstream. Commit e7cd1d1e ("mfd: twl4030-power: Add generic reset configuration") enabled configuring the PM features for twl4030. This caused poweroff command to fail on devices that have the BCI charger on twl4030 wired, or have power wired for VBUS. Instead of powering off, the device reboots. This is because voltage is detected on charger or VBUS with the default bits enabled for the power transition registers. To fix the issue, let's just clear VBUS and CHG bits as we want poweroff command to keep the system powered off. Fixes: e7cd1d1e ("mfd: twl4030-power: Add generic reset configuration") Reported-by:
Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by:
Tony Lindgren <tony@atomide.com> Signed-off-by:
Lee Jones <lee.jones@linaro.org> Signed-off-by:
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Christoph Hellwig authored
commit 48379270 upstream. Setups that use the blk-mq I/O path can lock up if a host with a single device that has its door locked enters EH. Make sure to only send the command to re-lock the door to devices that actually were reset and thus might have lost their state. Otherwise the EH code might be get blocked on blk_get_request as all requests for non-reset devices might be in use. Signed-off-by:
Christoph Hellwig <hch@lst.de> Reported-by:
Meelis Roos <meelis.roos@ut.ee> Tested-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
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Borislav Petkov authored
commit c0a717f2 upstream. Save the patch while we're running on the BSP instead of later, before the initrd has been jettisoned. More importantly, on 32-bit we need to access the physical address instead of the virtual. This way we actually do find it on the APs instead of having to go through the initrd each time. Tested-by:
Richard Hendershot <rshendershot@mchsi.com> Fixes: 5335ba5c ("x86, microcode, AMD: Fix early ucode loading") Signed-off-by:
Borislav Petkov <bp@suse.de> Signed-off-by:
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Pali Rohár authored
commit 9d720b34 upstream. On some Dell Latitude laptops ALPS device or Dell EC send one invalid byte in 6 bytes ALPS packet. In this case psmouse driver enter out of sync state. It looks like that all other bytes in packets are valid and also device working properly. So there is no need to do full device reset, just need to wait for byte which match condition for first byte (start of packet). Because ALPS packets are bigger (6 or 8 bytes) default limit is small. This patch increase number of invalid bytes to size of 2 ALPS packets which psmouse driver can drop before do full reset. Resetting ALPS devices take some time and when doing reset on some Dell laptops touchpad, trackstick and also keyboard do not respond. So it is better to do it only if really necessary. Signed-off-by:
Pali Rohár <pali.rohar@gmail.com> Tested-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by:
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Pali Rohár authored
commit 4ab8f7f3 upstream. 5th and 6th byte of ALPS trackstick V3 protocol match condition for first byte of PS/2 3 bytes packet. When driver enters out of sync state and ALPS trackstick is sending data then driver match 5th, 6th and next 1st bytes as PS/2. It basically means if user is using trackstick when driver is in out of sync state driver will never resync. Processing these bytes as 3 bytes PS/2 data cause total mess (random cursor movements, random clicks) and make trackstick unusable until psmouse driver decide to do full device reset. Lot of users reported problems with ALPS devices on Dell Latitude E6440, E6540 and E7440 laptops. ALPS device or Dell EC for unknown reason send some invalid ALPS PS/2 bytes which cause driver out of sync. It looks like that i8042 and psmouse/alps driver always receive group of 6 bytes packets so there are no missing bytes and no bytes were inserted between valid ones. This patch does not fix root of problem with ALPS devices found in Dell Latitude laptops but it does not allow to process some (invalid) subsequence of 6 bytes ALPS packets as 3 bytes PS/2 when driver is out of sync. So with this patch trackstick input device does not report bogus data when also driver is out of sync, so trackstick should be usable on those machines. Signed-off-by:
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Geert Uytterhoeven authored
commit 09712f55 upstream. When resuming from s2ram on an SMP system without cpufreq operating points (e.g. there's no "operating-points" property for the CPU node in DT, or the platform doesn't use DT yet), the kernel crashes when bringing CPU 1 online: Enabling non-boot CPUs ... CPU1: Booted secondary processor Unable to handle kernel NULL pointer dereference at virtual address 0000003c pgd = ee5e6b00 [0000003c] *pgd=6e579003, *pmd=6e588003, *pte=00000000 Internal error: Oops: a07 [#1] SMP ARM Modules linked in: CPU: 0 PID: 1246 Comm: s2ram Tainted: G W 3.18.0-rc3-koelsch-01614-g0377af242bb175c8-dirty #589 task: eeec5240 ti: ee704000 task.ti: ee704000 PC is at __cpufreq_add_dev.isra.24+0x24c/0x77c LR is at __cpufreq_add_dev.isra.24+0x244/0x77c pc : [<c0298efc>] lr : [<c0298ef4>] psr: 60000153 sp : ee705d48 ip : ee705d48 fp : ee705d84 r10: c04e0450 r9 : 00000000 r8 : 00000001 r7 : c05426a8 r6 : 00000001 r5 : 00000001 r4 : 00000000 r3 : 00000000 r2 : 00000000 r1 : 20000153 r0 : c0542734 Verify that policy is not NULL before dereferencing it to fix this. Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Fixes: 8414809c (cpufreq: Preserve policy structure across suspend/resume) Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
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Alex Deucher authored
commit f0d7bfb9 upstream. Need to unlock the crtc after updating the blanking state. Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Alex Deucher authored
commit 0b021c58 upstream. Use gart rather than vram to avoid having to deal with the HDP cache. Port of adfed2b0 (drm/radeon: use gart memory for DMA ring tests) to the IB tests. Signed-off-by:
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Alex Deucher authored
commit 8efe82ca upstream. The power management code calls into the display code for certain things. If certain power management sysfs attributes are called before the driver has finished initializing all of the hardware we can run into problems with uninitialized modesetting state. Add a check to make sure modesetting init has completed to the bandwidth update callbacks to fix this. Can be triggered by the tlp and laptop start up scripts depending on the timing. bugs: https://bugzilla.kernel.org/show_bug.cgi?id=83611 https://bugs.freedesktop.org/show_bug.cgi?id=85771Signed-off-by:
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Jammy Zhou authored
commit dc4edad6 upstream. CE ram size is 32k/0k/0k for GFX/CS0/CS1 with CIK Ported from amdgpu driver. Signed-off-by:
Jammy Zhou <Jammy.Zhou@amd.com> Signed-off-by:
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Takashi Iwai authored
commit e4742b1e upstream. The new Lenovo T440s laptop has a different PnP ID "LEN0039", and it needs the similar min/max quirk to make its clickpad working. BugLink: https://bugzilla.opensuse.org/show_bug.cgi?id=903748Reported-and-tested-by:
Joschi Brauchle <joschibrauchle@gmx.de> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Rodrigo Vivi authored
commit d6a8b72e upstream. Global GTT doesn't have pat_sel[2:0] so it always point to pat_sel = 000; So the only way to avoid screen corruptions is setting PAT 0 to Uncached. MOCS can still be used though. But if userspace is trusting PTE for cache selection the safest thing to do is to let caches disabled. BSpec: "For GGTT, there is NO pat_sel[2:0] from the entry, so RTL will always use the value corresponding to pat_sel = 000" - System agent ggtt writes (i.e. cpu gtt mmaps) already work before this patch, i.e. the same uncached + snooping access like on gen6/7 seems to be in effect. - So this just fixes blitter/render access. Again it looks like it's not just uncached access, but uncached + snooping. So we can still hold onto all our assumptions wrt cpu clflushing on LLC machines. v2: Cleaner patch as suggested by Chris. v3: Add Daniel's comment Reference: https://bugs.freedesktop.org/show_bug.cgi?id=85576 Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: James Ausmus <james.ausmus@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Jani Nikula <jani.nikula@intel.com> Tested-by:
James Ausmus <james.ausmus@intel.com> Reviewed-by:
Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Signed-off-by:
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Greg Kurz authored
commit 24c65bc7 upstream. The add_early_randomness() function in drivers/char/hw_random/core.c passes a 16-byte buffer to pseries_rng_data_read(). Unfortunately, plpar_hcall() returns four 64-bit values and trashes 16 bytes on the stack. This bug has been lying around for a long time. It got unveiled by: commit d3cc7996 Author: Amit Shah <amit.shah@redhat.com> Date: Thu Jul 10 15:42:34 2014 +0530 hwrng: fetch randomness only after device init It may trig a oops while loading or unloading the pseries-rng module for both PowerVM and PowerKVM guests. This patch does two things: - pass an intermediate well sized buffer to plpar_hcall(). This is acceptalbe since we're not on a hot path. - move to the new read API so that we know the return buffer size for sure. Signed-off-by:
Greg Kurz <gkurz@linux.vnet.ibm.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Cristian Stoica authored
commit 738459e3 upstream. If dma mapping for dma_addr_out fails, the descriptor memory is freed but the previous dma mapping for dma_addr_in remains. This patch resolves the missing dma unmap and groups resource allocations at function start. Signed-off-by:
Cristian Stoica <cristian.stoica@freescale.com> Signed-off-by:
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- 20 Nov, 2014 23 commits
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Nadav Amit authored
commit d29b9d7e upstream. The emulator could reuse an op->type from a previous instruction for some immediate values. If it mistakenly considers the operands as memory operands, it will performs a memory read and overwrite op->val. Consider for instance the ROR instruction - src2 (the number of times) would be read from memory instead of being used as immediate. Mark every immediate operand as such to avoid this problem. Fixes: c44b4c6aSigned-off-by:
Nadav Amit <namit@cs.technion.ac.il> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
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Joe Thornber authored
commit c822ed96 upstream. Avoids normal IO racing with discard. Signed-off-by:
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Herbert Xu authored
commit 3ce9b20f upstream. When VLAN is in use in macvtap_put_user, we end up setting csum_start to the wrong place. The result is that the whoever ends up doing the checksum setting will corrupt the packet instead of writing the checksum to the expected location, usually this means writing the checksum with an offset of -4. This patch fixes this by adjusting csum_start when VLAN tags are detected. Fixes: f09e2249 ("macvtap: restore vlan header on user read") Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Herbert Xu authored
commit a8f9bfdf upstream. When VLAN acceleration is in use on the xmit path, we end up setting csum_start to the wrong place. The result is that the whoever ends up doing the checksum setting will corrupt the packet instead of writing the checksum to the expected location, usually this means writing the checksum with an offset of -4. This patch fixes this by adjusting csum_start when VLAN acceleration is detected. Fixes: 6680ec68 ("tuntap: hardware vlan tx support") Signed-off-by:
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Emmanuel Grumbach authored
commit 31b8b343 upstream. If the RFkill interrupt fires while we calibrate, it would make the firmware fail and the driver wasn't able to recover. Change the flow so that the driver will kill the firmware in that case. Since we have now two flows that are calling trans_stop_device (the RFkill interrupt and the op_mode_mvm_start function) - we need to better sync this. Use the STATUS_DEVICE_ENABLED in the pcie transport in an atomic way to achieve this. This fixes: https://bugzilla.kernel.org/show_bug.cgi?id=86231Reviewed-by:
Johannes Berg <johannes.berg@intel.com> Reviewed-by:
Luciano Coelho <luciano.coelho@intel.com> Signed-off-by:
Emmanuel Grumbach <emmanuel.grumbach@intel.com> [ luis: used Emmanuel's backport to 3.17 ] Signed-off-by:
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Johannes Berg authored
commit b8fff407 upstream. Upon receiving the last fragment, all but the first fragment are freed, but the multicast check for statistics at the end of the function refers to the current skb (the last fragment) causing a use-after-free bug. Since multicast frames cannot be fragmented and we check for this early in the function, just modify that check to also do the accounting to fix the issue. Reported-by:
Yosef Khyal <yosefx.khyal@intel.com> Signed-off-by:
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Andrew Lunn authored
commit 5129ee22 upstream. A second product has come to light which makes use of the A0 stepping of the Armada XP SoC. A0 stepping has a hardware bug in the i2c core meaning that hardware offload does not work, resulting in the kernel failing to boot. The quirk detects that the kernel is running on an A0 stepping SoC and disables the use of hardware offload. Currently the quirk is only enabled for PlatHome Openblocks AX3. The AX3 has been produced with both A0 and B0 stepping SoCs. The second product is the Lenovo Iomega IX4-300d. It seems likely that this device will also swap from A0 to B0 SoC sometime during its life. If there are two products using A0, it seems likely there are more products with A0. Also, since the number of A0 SoCs is limited, these products are also likely to transition to B0. Hence detecting at run time is the safest option. So enable the quirk for all Armada XP boards. Tested on an AX3 with A0 stepping. Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Acked-by:
Gregory CLEMENT <gregory.clement@free-electrons.com> Acked-by:
Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Fixes: 930ab3d4: ("i2c: mv64xxx: Add I2C Transaction Generator support") Link: https://lkml.kernel.org/r/1406395238-29758-2-git-send-email-andrew@lunn.chSigned-off-by:
Jason Cooper <jason@lakedaemon.net> Signed-off-by:
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Junjie Mao authored
commit e6023367 upstream. When choosing a random address, the current implementation does not take into account the reversed space for .bss and .brk sections. Thus the relocated kernel may overlap other components in memory. Here is an example of the overlap from a x86_64 kernel in qemu (the ranges of physical addresses are presented): Physical Address 0x0fe00000 --+--------------------+ <-- randomized base / | relocated kernel | vmlinux.bin | (from vmlinux.bin) | 0x1336d000 (an ELF file) +--------------------+-- \ | | \ 0x1376d870 --+--------------------+ | | relocs table | | 0x13c1c2a8 +--------------------+ .bss and .brk | | | 0x13ce6000 +--------------------+ | | | / 0x13f77000 | initrd |-- | | 0x13fef374 +--------------------+ The initrd image will then be overwritten by the memset during early initialization: [ 1.655204] Unpacking initramfs... [ 1.662831] Initramfs unpacking failed: junk in compressed archive This patch prevents the above situation by requiring a larger space when looking for a random kernel base, so that existing logic can effectively avoids the overlap. [kees: switched to perl to avoid hex translation pain in mawk vs gawk] [kees: calculated overlap without relocs table] Fixes: 82fa9637 ("x86, kaslr: Select random position from e820 maps") Reported-by:
Fengguang Wu <fengguang.wu@intel.com> Signed-off-by:
Junjie Mao <eternal.n08@gmail.com> Signed-off-by:
Kees Cook <keescook@chromium.org> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1414762838-13067-1-git-send-email-eternal.n08@gmail.comSigned-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Borislav Petkov authored
commit 4750a0d1 upstream. Konrad triggered the following splat below in a 32-bit guest on an AMD box. As it turns out, in save_microcode_in_initrd_amd() we're using the *physical* address of the container *after* we have enabled paging and thus we #PF in load_microcode_amd() when trying to access the microcode container in the ramdisk range. Because the ramdisk is exactly there: [ 0.000000] RAMDISK: [mem 0x35e04000-0x36ef9fff] and we fault at 0x35e04304. And since this guest doesn't relocate the ramdisk, we don't do the computation which will give us the correct virtual address and we end up with the PA. So, we should actually be using virtual addresses on 32-bit too by the time we're freeing the initrd. Do that then! Unpacking initramfs... BUG: unable to handle kernel paging request at 35d4e304 IP: [<c042e905>] load_microcode_amd+0x25/0x4a0 *pde = 00000000 Oops: 0000 [#1] SMP Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.17.1-302.fc21.i686 #1 Hardware name: Xen HVM domU, BIOS 4.4.1 10/01/2014 task: f5098000 ti: f50d0000 task.ti: f50d0000 EIP: 0060:[<c042e905>] EFLAGS: 00010246 CPU: 0 EIP is at load_microcode_amd+0x25/0x4a0 EAX: 00000000 EBX: f6e9ec4c ECX: 00001ec4 EDX: 00000000 ESI: f5d4e000 EDI: 35d4e2fc EBP: f50d1ed0 ESP: f50d1e94 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 CR0: 8005003b CR2: 35d4e304 CR3: 00e33000 CR4: 000406d0 Stack: 00000000 00000000 f50d1ebc f50d1ec4 f5d4e000 c0d7735a f50d1ed0 15a3d17f f50d1ec4 00600f20 00001ec4 bfb83203 f6e9ec4c f5d4e000 c0d7735a f50d1ed8 c0d80861 f50d1ee0 c0d80429 f50d1ef0 c0d889a9 f5d4e000 c0000000 f50d1f04 Call Trace: ? unpack_to_rootfs ? unpack_to_rootfs save_microcode_in_initrd_amd save_microcode_in_initrd free_initrd_mem populate_rootfs ? unpack_to_rootfs do_one_initcall ? unpack_to_rootfs ? repair_env_string ? proc_mkdir kernel_init_freeable kernel_init ret_from_kernel_thread ? rest_init Reported-and-tested-by:
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> References: https://bugzilla.redhat.com/show_bug.cgi?id=1158204 Fixes: 75a1ba5b ("x86, microcode, AMD: Unify valid container checks") Signed-off-by:
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Jan Kara authored
commit ece9c72a upstream. Priority of a merged request is computed by ioprio_best(). If one of the requests has undefined priority (IOPRIO_CLASS_NONE) and another request has priority from IOPRIO_CLASS_BE, the function will return the undefined priority which is wrong. Fix the function to properly return priority of a request with the defined priority. Fixes: d58cdfb8Signed-off-by:
Jan Kara <jack@suse.cz> Reviewed-by:
Jeff Moyer <jmoyer@redhat.com> Signed-off-by:
Jens Axboe <axboe@fb.com> Signed-off-by:
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Richard Guy Briggs authored
commit 897f1acb upstream. Add a space between subj= and feature= fields to make them parsable. Signed-off-by:
Richard Guy Briggs <rgb@redhat.com> Signed-off-by:
Paul Moore <pmoore@redhat.com> Signed-off-by:
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Johannes Berg authored
commit 46238845 upstream. When an interface is deleted, an ongoing hardware scan is canceled and the driver must abort the scan, at the very least reporting completion while the interface is removed. However, if it scheduled the work that might only run after everything is said and done, which leads to cfg80211 warning that the scan isn't reported as finished yet; this is no fault of the driver, it already did, but mac80211 hasn't processed it. To fix this situation, flush the delayed work when the interface being removed is the one that was executing the scan. Reported-by:
Sujith Manoharan <sujith@msujith.org> Tested-by:
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Luciano Coelho authored
commit ff1e417c upstream. Due to the time it takes to process the beacon that started the CSA process, we may be late for the switch if we try to reach exactly beacon 0. To avoid that, use count - 1 when calculating the switch time. Reported-by:
Jouni Malinen <j@w1.fi> Signed-off-by:
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Luciano Coelho authored
commit 84469a45 upstream. If we are switching from an HT40+ to an HT40- channel (or vice-versa), we need the secondary channel offset IE to specify what is the post-CSA offset to be used. This applies both to beacons and to probe responses. In ieee80211_parse_ch_switch_ie() we were ignoring this IE from beacons and using the *current* HT information IE instead. This was causing us to use the same offset as before the switch. Fix that by using the secondary channel offset IE also for beacons and don't ever use the pre-switch offset. Additionally, remove the "beacon" argument from ieee80211_parse_ch_switch_ie(), since it's not needed anymore. Reported-by:
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Krzysztof Kozlowski authored
commit cdaf3e15 upstream. The charger manager obtained in probe references to power supplies for all chargers with power_supply_get_by_name() for later usage. However if such charger driver was removed then this reference would point to old power supply (from driver which was removed). This lead to accessing invalid memory which could be observed with: $ echo "max77693-charger" > /sys/bus/platform/drivers/max77693-charger/unbind $ grep . /sys/devices/virtual/power_supply/battery/charger.0/* $ grep . /sys/devices/virtual/power_supply/battery/* [ 15.339817] Unable to handle kernel paging request at virtual address 0001c12c [ 15.346187] pgd = edd08000 [ 15.348814] [0001c12c] *pgd=6dce2831, *pte=00000000, *ppte=00000000 [ 15.355075] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 15.360967] Modules linked in: [ 15.364010] CPU: 2 PID: 1388 Comm: grep Not tainted 3.17.0-next-20141007-00027-ga95e761db1b0 #245 [ 15.372859] task: ee03ad00 ti: edcf6000 task.ti: edcf6000 [ 15.378241] PC is at 0x1c12c [ 15.381113] LR is at is_ext_pwr_online+0x30/0x6c [ 15.385706] pc : [<0001c12c>] lr : [<c0339fc4>] psr: a0000013 [ 15.385706] sp : edcf7e88 ip : 00000000 fp : 00000000 [ 15.397161] r10: eeb02c08 r9 : c04b1f84 r8 : eeb02c00 [ 15.402369] r7 : edc69a10 r6 : eea6ac10 r5 : eea6ac10 r4 : 00000004 [ 15.408878] r3 : 0001c12c r2 : edcf7e8c r1 : 00000004 r0 : ee914418 [ 15.415390] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 15.422506] Control: 10c5387d Table: 6dd0804a DAC: 00000015 [ 15.428236] Process grep (pid: 1388, stack limit = 0xedcf6240) [ 15.434050] Stack: (0xedcf7e88 to 0xedcf8000) [ 15.438395] 7e80: ee03ad00 00000000 edcf7f80 eea6aca8 edcf7ec4 c033b7b0 [ 15.446554] 7ea0: 00000001 ee1cc3f0 00000004 c06e1e44 eebdc000 c06e1e44 eeb02c00 c0337144 [ 15.454713] 7ec0: ee2dac68 c005cffc ee1cc3c0 c06e1e44 00000fff 00001000 eebdc000 c0278ca8 [ 15.462872] 7ee0: c0278c8c ee1cc3c0 eeb7ce00 c014422c edcf7f20 00008000 ee1cc3c0 ee9a48c0 [ 15.471030] 7f00: 00000001 00000001 edcf7f80 c0142d94 c0142d70 c01060f4 00021000 ee1cc3f0 [ 15.479190] 7f20: 00000000 00000000 c06a2150 eebdc000 2e7ec000 ee9a48c0 00008000 00021000 [ 15.487349] 7f40: edcf7f80 00008000 edcf6000 00021000 00021000 c00e39a4 00000000 ee9a48c0 [ 15.495508] 7f60: 00004000 00000000 00000000 ee9a48c0 ee9a48c0 00008000 00021000 c00e3aa0 [ 15.503668] 7f80: 00000000 00000000 0001f2e0 0001f2e0 00021000 00001000 00000003 c000f364 [ 15.511826] 7fa0: 00000000 c000f1a0 0001f2e0 00021000 00000003 00021000 00008000 00000000 [ 15.519986] 7fc0: 0001f2e0 00021000 00001000 00000003 00000001 000205e8 00000000 00021000 [ 15.528145] 7fe0: 00008000 bebbe910 0000a7ad b6edc49c 60000010 00000003 aaaaaaaa aaaaaaaa [ 15.536320] [<c0339fc4>] (is_ext_pwr_online) from [<c033b7b0>] (charger_get_property+0x170/0x314) [ 15.545164] [<c033b7b0>] (charger_get_property) from [<c0337144>] (power_supply_show_property+0x48/0x20c) [ 15.554719] [<c0337144>] (power_supply_show_property) from [<c0278ca8>] (dev_attr_show+0x1c/0x48) [ 15.563577] [<c0278ca8>] (dev_attr_show) from [<c014422c>] (sysfs_kf_seq_show+0x84/0x104) [ 15.571725] [<c014422c>] (sysfs_kf_seq_show) from [<c0142d94>] (kernfs_seq_show+0x24/0x28) [ 15.579973] [<c0142d94>] (kernfs_seq_show) from [<c01060f4>] (seq_read+0x1b0/0x484) [ 15.587614] [<c01060f4>] (seq_read) from [<c00e39a4>] (vfs_read+0x88/0x144) [ 15.594552] [<c00e39a4>] (vfs_read) from [<c00e3aa0>] (SyS_read+0x40/0x8c) [ 15.601417] [<c00e3aa0>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 15.608877] Code: bad PC value [ 15.611991] ---[ end trace a88fcc95208db283 ]--- The charger-manager should get reference to charger power supply on each use of get_property callback. Signed-off-by:
Krzysztof Kozlowski <k.kozlowski@samsung.com> Fixes: 3bb3dbbd ("power_supply: Add initial Charger-Manager driver") Signed-off-by:
Sebastian Reichel <sre@kernel.org> Signed-off-by:
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Krzysztof Kozlowski authored
commit bdbe8144 upstream. The charger manager obtained reference to fuel gauge power supply in probe with power_supply_get_by_name() for later usage. However if fuel gauge driver was removed and re-added then this reference would point to old power supply (from driver which was removed). This lead to accessing old (and probably invalid) memory which could be observed with: $ echo "12-0036" > /sys/bus/i2c/drivers/max17042/unbind $ echo "12-0036" > /sys/bus/i2c/drivers/max17042/bind $ cat /sys/devices/virtual/power_supply/battery/capacity [ 240.480084] INFO: task cat:1393 blocked for more than 120 seconds. [ 240.484799] Not tainted 3.17.0-next-20141007-00028-ge60b6dd79570 #203 [ 240.491782] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 240.499589] cat D c0469530 0 1393 1 0x00000000 [ 240.505947] [<c0469530>] (__schedule) from [<c0469d3c>] (schedule_preempt_disabled+0x14/0x20) [ 240.514449] [<c0469d3c>] (schedule_preempt_disabled) from [<c046af08>] (mutex_lock_nested+0x1bc/0x458) [ 240.523736] [<c046af08>] (mutex_lock_nested) from [<c0287a98>] (regmap_read+0x30/0x60) [ 240.531647] [<c0287a98>] (regmap_read) from [<c032238c>] (max17042_get_property+0x2e8/0x350) [ 240.540055] [<c032238c>] (max17042_get_property) from [<c03247d8>] (charger_get_property+0x264/0x348) [ 240.549252] [<c03247d8>] (charger_get_property) from [<c0320764>] (power_supply_show_property+0x48/0x1e0) [ 240.558808] [<c0320764>] (power_supply_show_property) from [<c027308c>] (dev_attr_show+0x1c/0x48) [ 240.567664] [<c027308c>] (dev_attr_show) from [<c0141fb0>] (sysfs_kf_seq_show+0x84/0x104) [ 240.575814] [<c0141fb0>] (sysfs_kf_seq_show) from [<c0140b18>] (kernfs_seq_show+0x24/0x28) [ 240.584061] [<c0140b18>] (kernfs_seq_show) from [<c0104574>] (seq_read+0x1b0/0x484) [ 240.591702] [<c0104574>] (seq_read) from [<c00e1e24>] (vfs_read+0x88/0x144) [ 240.598640] [<c00e1e24>] (vfs_read) from [<c00e1f20>] (SyS_read+0x40/0x8c) [ 240.605507] [<c00e1f20>] (SyS_read) from [<c000e760>] (ret_fast_syscall+0x0/0x48) [ 240.612952] 4 locks held by cat/1393: [ 240.616589] #0: (&p->lock){+.+.+.}, at: [<c01043f4>] seq_read+0x30/0x484 [ 240.623414] #1: (&of->mutex){+.+.+.}, at: [<c01417dc>] kernfs_seq_start+0x1c/0x8c [ 240.631086] #2: (s_active#31){++++.+}, at: [<c01417e4>] kernfs_seq_start+0x24/0x8c [ 240.638777] #3: (&map->mutex){+.+...}, at: [<c0287a98>] regmap_read+0x30/0x60 The charger-manager should get reference to fuel gauge power supply on each use of get_property callback. The thermal zone 'tzd' field of power supply should not be used because of the same reason. Additionally this change solves also the issue with nested thermal_zone_get_temp() calls and related false lockdep positive for deadlock for thermal zone's mutex [1]. When fuel gauge is used as source of temperature then the charger manager forwards its get_temp calls to fuel gauge thermal zone. So actually different mutexes are used (one for charger manager thermal zone and second for fuel gauge thermal zone) but for lockdep this is one class of mutex. The recursion is removed by retrieving temperature through power supply's get_property(). In case external thermal zone is used ('cm-thermal-zone' property is present in DTS) the recursion does not exist. Charger manager simply exports POWER_SUPPLY_PROP_TEMP_AMBIENT property (instead of POWER_SUPPLY_PROP_TEMP) thus no thermal zone is created for this power supply. [1] https://lkml.org/lkml/2014/10/6/309Signed-off-by:
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Krzysztof Kozlowski authored
commit 21e863b2 upstream. Memory allocated for 'name' was leaking if required binding properties were not present. The memory for 'name' was allocated early at probe with kasprintf(). It was freed in error paths executed before and after parsing DTS but not in that error path. Fix the error path for parsing device tree properties. Signed-off-by:
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Krzysztof Kozlowski authored
commit 0eaf437a upstream. The power_supply_get_by_phandle() on error returns ENODEV or NULL. The driver later expects obtained pointer to power supply to be valid or NULL. If it is not NULL then it dereferences it in bq2415x_notifier_call() which would lead to dereferencing ENODEV-value pointer. Properly handle the power_supply_get_by_phandle() error case by replacing error value with NULL. This indicates that usb charger detection won't be used. Fix also memory leak of 'name' if power_supply_get_by_phandle() fails with NULL and probe should defer. Signed-off-by:
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James Ralston authored
commit 690000b9 upstream. This patch adds the AHCI-mode SATA Device IDs for the Intel Sunrise Point PCH. Signed-off-by:
James Ralston <james.d.ralston@intel.com> Signed-off-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
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Tejun Heo authored
commit 66a7cbc3 upstream. Samsung pci-e SSDs on macbooks failed miserably on NCQ commands, so 67809f85 ("ahci: disable NCQ on Samsung pci-e SSDs on macbooks") disabled NCQ on them. It turns out that NCQ is fine as long as MSI is not used, so let's turn off MSI and leave NCQ on. Signed-off-by:
Imre Kaloz <kaloz@openwrt.org> Fixes: 67809f85 ("ahci: disable NCQ on Samsung pci-e SSDs on macbooks") Signed-off-by:
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Simon Horman authored
commit aa1cf258 upstream. Unlike other SATA R-Car r8a7790 controllers the r8a7790 ES1 SATA R-Car controller needs to be run with DIPM disabled. Signed-off-by:
Simon Horman <horms+renesas@verge.net.au> Signed-off-by:
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Heinz Mauelshagen authored
commit 40d43c4b upstream. The dm-raid superblock (struct dm_raid_superblock) is padded to 512 bytes and that size is being used to read it in from the metadata device into one preallocated page. Reading or writing this on a 512-byte sector device works fine but on a 4096-byte sector device this fails. Set the dm-raid superblock's size to the logical block size of the metadata device, because IO at that size is guaranteed too work. Also add a size check to avoid silent partial metadata loss in case the superblock should ever grow past the logical block size or PAGE_SIZE. [includes pointer math fix from Dan Carpenter] Reported-by:
"Liuhua Wang" <lwang@suse.com> Signed-off-by:
Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Max Filippov authored
commit 2651cc69 upstream. Userspace actually passes single parameter (path name) to the umount syscall, so new umount just fails. Fix it by requesting old umount syscall implementation and re-wiring umount to it. Signed-off-by:
Max Filippov <jcmvbkbc@gmail.com> Signed-off-by:
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