- 22 Aug, 2016 40 commits
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Dan Carpenter authored
commit f18ebc21 upstream. The problem with ornamental, do-nothing gotos is that they lead to "forgot to set the error code" bugs. We should be returning -EINVAL here but we don't. It leads to an uninitalized variable in counter_show(): drivers/acpi/sysfs.c:603 counter_show() error: uninitialized symbol 'status'. Fixes: 1c8fce27 (ACPI: introduce drivers/acpi/sysfs.c) Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
Ben Hutchings <ben@decadent.org.uk>
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Sai Gurrappadi authored
commit e43e94c1 upstream. Currently, the userspace governor only updates frequency on GOV_LIMITS if policy->cur falls outside policy->{min/max}. However, it is also necessary to update current frequency on GOV_LIMITS to match the user requested value if it can be achieved within the new policy->{max/min}. This was previously the behaviour in the governor until commit d1922f02 ("cpufreq: Simplify userspace governor") which incorrectly assumed that policy->cur == user requested frequency via scaling_setspeed. This won't be true if the user requested frequency falls outside policy->{min/max}. Ex: a temporary thermal cap throttled the user requested frequency. Fix this by storing the user requested frequency in a seperate variable. The governor will then try to achieve this request on every GOV_LIMITS change. Fixes: d1922f02 (cpufreq: Simplify userspace governor) Signed-off-by:
Sai Gurrappadi <sgurrappadi@nvidia.com> Acked-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
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Lei Liu authored
commit 74d2a91a upstream. Add even more ZTE device ids. Signed-off-by:
lei liu <liu.lei78@zte.com.cn> [johan: rebase and replace commit message ] Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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lei liu authored
commit f0d09463 upstream. More ZTE device ids. Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Jiri Slaby authored
commit 6798df4c upstream. When csw->con_startup() fails in do_register_con_driver, we return no error (i.e. 0). This was changed back in 2006 by commit 3e795de7. Before that we used to return -ENODEV. So fix the return value to be -ENODEV in that case again. Fixes: 3e795de7 ("VT binding: Add binding/unbinding support for the VT console") Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Reported-by:
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Andreas Werner authored
commit f75564d3 upstream. The bar number is found in reg2 within the gdd. Therefore we need to change the assigment from reg1 to reg2 which is the correct location. Signed-off-by:
Andreas Werner <andreas.werner@men.de> Fixes: '3764e82e' drivers: Introduce MEN Chameleon Bus Signed-off-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
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Schemmel Hans-Christoph authored
commit 444f94e9 upstream. Added support for Gemalto's Cinterion PH8 and AHxx products with 2 RmNet Interfaces and products with 1 RmNet + 1 USB Audio interface. In addition some minor renaming and formatting. Signed-off-by:
Hans-Christoph Schemmel <hans-christoph.schemmel@gemalto.com> [johan: sort current entries and trim trailing whitespace ] Signed-off-by:
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Arnd Bergmann authored
commit 1f62ff34 upstream. dev_dbg_ratelimited() is a macro that ignores its first argument when DEBUG is not set, which can lead to unused variable warnings: ethernet/mellanox/mlxsw/pci.c: In function 'mlxsw_pci_cqe_sdq_handle': ethernet/mellanox/mlxsw/pci.c:646:18: warning: unused variable 'pdev' [-Wunused-variable] ethernet/mellanox/mlxsw/pci.c: In function 'mlxsw_pci_cqe_rdq_handle': ethernet/mellanox/mlxsw/pci.c:671:18: warning: unused variable 'pdev' [-Wunused-variable] The macro already ensures that all its other arguments are silently ignored by the compiler without triggering a warning, through the use of the no_printk() macro, but the dev argument is not passed into that. This changes the definition to use the same trick as no_printk() with an if(0) that leads the compiler to not evaluate the side-effects but still see that 'dev' might not be unused. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Suggested-by:
Andrew Lunn <andrew@lunn.ch> Fixes: 6f586e66 ("driver-core: Shut up dev_dbg_reatelimited() without DEBUG") Reviewed-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by:
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Geert Uytterhoeven authored
commit 309124e2 upstream. According to full-history-linux commit d3794f4fa7c3edc3 ("[PATCH] M68k update (part 25)"), port operations are allowed on m68k if CONFIG_ISA is defined. However, commit 153dcc54 ("[PATCH] mem driver: fix conditional on isa i/o support") accidentally changed an "||" into an "&&", disabling it completely on m68k. This logic was retained when introducing the DEVPORT symbol in commit 4f911d64 ("Make /dev/port conditional on config symbol"). Drop the bogus dependency on !M68K to fix this. Fixes: 153dcc54 ("[PATCH] mem driver: fix conditional on isa i/o support") Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Tested-by:
Al Stone <ahs3@redhat.com> Signed-off-by:
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Brian Bloniarz authored
commit 0f40fbbc upstream. OpenSSH expects the (non-blocking) read() of pty master to return EAGAIN only if it has received all of the slave-side output after it has received SIGCHLD. This used to work on pre-3.12 kernels. This fix effectively forces non-blocking read() and poll() to block for parallel i/o to complete for all ttys. It also unwinds these changes: 1) f8747d4a tty: Fix pty master read() after slave closes 2) 52bce7f8 pty, n_tty: Simplify input processing on final close 3) 1a48632f pty: Fix input race when closing Inspired by analysis and patch from Marc Aurele La France <tsi@tuyoix.net> Reported-by:
Volth <openssh@volth.com> Reported-by:
Marc Aurele La France <tsi@tuyoix.net> BugLink: https://bugzilla.mindrot.org/show_bug.cgi?id=52 BugLink: https://bugzilla.mindrot.org/show_bug.cgi?id=2492Signed-off-by:
Brian Bloniarz <brian.bloniarz@gmail.com> Reviewed-by:
Peter Hurley <peter@hurleysoftware.com> Signed-off-by:
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Peter Hurley authored
commit 2ce3c10c upstream. This reverts commit c4dc3046. This fix is superseded by commit 52bce7f8, 'pty, n_tty: Simplify input processing on final close'. The final close now waits for input processing to complete before destroying the pty, so poll() does not need to special case this condition. Cc: Francesco Ruggeri <fruggeri@arista.com> Signed-off-by:
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Matthias Schiffer authored
commit f5b556c9 upstream. This makes the ath79 bootconsole behave the same way as the generic 8250 bootconsole. Also waiting for TEMT (transmit buffer is empty) instead of just THRE (transmit buffer is not full) ensures that all characters have been transmitted before the real serial driver starts reconfiguring the serial controller (which would sometimes result in garbage being transmitted.) This change does not cause a visible performance loss. In addition, this seems to fix a hang observed in certain configurations on many AR7xxx/AR9xxx SoCs during autoconfig of the real serial driver. A more complete follow-up patch will disable 8250 autoconfig for ath79 altogether (the serial controller is detected as a 16550A, which is not fully compatible with the ath79 serial, and the autoconfig may lead to undefined behavior on ath79.) Signed-off-by:
Matthias Schiffer <mschiffer@universe-factory.net> Signed-off-by:
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Theodore Ts'o authored
commit 7827a7f6 upstream. Instead of just printing warning messages, if the orphan list is corrupted, declare the file system is corrupted. If there are any reserved inodes in the orphaned inode list, declare the file system corrupted and stop right away to avoid doing more potential damage to the file system. Signed-off-by:
Theodore Ts'o <tytso@mit.edu> [bwh: Backported to 3.16: leave error code as EIO] Signed-off-by:
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Theodore Ts'o authored
commit c9eb13a9 upstream. If the orphaned inode list contains inode #5, ext4_iget() returns a bad inode (since the bootloader inode should never be referenced directly). Because of the bad inode, we end up processing the inode repeatedly and this hangs the machine. This can be reproduced via: mke2fs -t ext4 /tmp/foo.img 100 debugfs -w -R "ssv last_orphan 5" /tmp/foo.img mount -o loop /tmp/foo.img /mnt (But don't do this if you are using an unpatched kernel if you care about the system staying functional. :-) This bug was found by the port of American Fuzzy Lop into the kernel to find file system problems[1]. (Since it *only* happens if inode #5 shows up on the orphan list --- 3, 7, 8, etc. won't do it, it's not surprising that AFL needed two hours before it found it.) [1] http://events.linuxfoundation.org/sites/events/files/slides/AFL%20filesystem%20fuzzing%2C%20Vault%202016_0.pdf Reported by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by:
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Raghava Aditya Renukunta authored
commit fc4bf75e upstream. Typically under error conditions, it is possible for aac_command_thread() to miss the wakeup from kthread_stop() and go back to sleep, causing it to hang aac_shutdown. In the observed scenario, the adapter is not functioning correctly and so aac_fib_send() never completes (or time-outs depending on how it was called). Shortly after aac_command_thread() starts it performs aac_fib_send(SendHostTime) which hangs. When aac_probe_one /aac_get_adapter_info send time outs, kthread_stop is called which breaks the command thread out of it's hang. The code will still go back to sleep in schedule_timeout() without checking kthread_should_stop() so it causes aac_probe_one to hang until the schedule_timeout() which is 30 minutes. Fixed by: Adding another kthread_should_stop() before schedule_timeout() Signed-off-by:
Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com> Reviewed-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
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Raghava Aditya Renukunta authored
commit 07beca2b upstream. aac_fib_send has a special function case for initial commands during driver initialization using wait < 0(pseudo sync mode). In this case, the command does not sleep but rather spins checking for timeout.This loop is calls cpu_relax() in an attempt to allow other processes/threads to use the CPU, but this function does not relinquish the CPU and so the command will hog the processor. This was observed in a KDUMP "crashkernel" and that prevented the "command thread" (which is responsible for completing the command from being timed out) from starting because it could not get the CPU. Fixed by replacing "cpu_relax()" call with "schedule()" Signed-off-by:
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Marc Zyngier authored
commit d4b9e079 upstream. The ARM architecture mandates that when changing a page table entry from a valid entry to another valid entry, an invalid entry is first written, TLB invalidated, and only then the new entry being written. The current code doesn't respect this, directly writing the new entry and only then invalidating TLBs. Let's fix it up. Reported-by:
Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
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Luke Dashjr authored
commit 4c63c245 upstream. 32-bit ioctl uses these rather than the regular FS_IOC_* versions. They can be handled in btrfs using the same code. Without this, 32-bit {ch,ls}attr fail. Signed-off-by:
Luke Dashjr <luke-jr+git@utopios.org> Reviewed-by:
Josef Bacik <jbacik@fb.com> Reviewed-by:
David Sterba <dsterba@suse.com> Signed-off-by:
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Marek Szyprowski authored
commit d1497977 upstream. sg_dma_len() macro can be used only on scattelists which are mapped, so all calls to it before dma_map_sg() are invalid. Replace them by proper check for direct sg segment length read. Fixes: a49e490c ("crypto: s5p-sss - add S5PV210 advanced crypto engine support") Fixes: 9e4a1100 ("crypto: s5p-sss - Handle unaligned buffers") Signed-off-by:
Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by:
Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by:
Vladimir Zapolskiy <vz@mleia.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> [bwh: Backported to 3.16: unaligned DMA is unsupported so there is a different set of calls to replace] Signed-off-by:
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Bjorn Helgaas authored
commit c20e1280 upstream. The alpha pci_mmap_resource() is used for both IORESOURCE_MEM and IORESOURCE_IO resources, but iomem_is_exclusive() is only applicable for IORESOURCE_MEM. Call iomem_is_exclusive() only for IORESOURCE_MEM resources, and do it earlier to match the generic version of pci_mmap_resource(). Fixes: 10a0ef39 ("PCI/alpha: pci sysfs resources") Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> CC: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by:
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Bjorn Helgaas authored
commit ca620723 upstream. iomem_is_exclusive() requires a CPU physical address, but on some arches we supplied a PCI bus address instead. On most arches, pci_resource_to_user(res) returns "res->start", which is a CPU physical address. But on microblaze, mips, powerpc, and sparc, it returns the PCI bus address corresponding to "res->start". The result is that pci_mmap_resource() may fail when it shouldn't (if the bus address happens to match an existing resource), or it may succeed when it should fail (if the resource is exclusive but the bus address doesn't match it). Call iomem_is_exclusive() with "res->start", which is always a CPU physical address, not the result of pci_resource_to_user(). Fixes: e8de1481 ("resource: allow MMIO exclusivity for device drivers") Suggested-by:
Yinghai Lu <yinghai@kernel.org> Signed-off-by:
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Krzysztof Kozlowski authored
commit 79152e8d upstream. The tcrypt testing module on Exynos5422-based Odroid XU3/4 board failed on testing 8 kB size blocks: $ sudo modprobe tcrypt sec=1 mode=500 testing speed of async ecb(aes) (ecb-aes-s5p) encryption test 0 (128 bit key, 16 byte blocks): 21971 operations in 1 seconds (351536 bytes) test 1 (128 bit key, 64 byte blocks): 21731 operations in 1 seconds (1390784 bytes) test 2 (128 bit key, 256 byte blocks): 21932 operations in 1 seconds (5614592 bytes) test 3 (128 bit key, 1024 byte blocks): 21685 operations in 1 seconds (22205440 bytes) test 4 (128 bit key, 8192 byte blocks): This was caused by a race issue of missed BRDMA_DONE ("Block cipher Receiving DMA") interrupt. Device starts processing the data in DMA mode immediately after setting length of DMA block: receiving (FCBRDMAL) or transmitting (FCBTDMAL). The driver sets these lengths from interrupt handler through s5p_set_dma_indata() function (or xxx_setdata()). However the interrupt handler was first dealing with receive buffer (dma-unmap old, dma-map new, set receive block length which starts the operation), then with transmit buffer and finally was clearing pending interrupts (FCINTPEND). Because of the time window between setting receive buffer length and clearing pending interrupts, the operation on receive buffer could end already and driver would miss new interrupt. User manual for Exynos5422 confirms in example code that setting DMA block lengths should be the last operation. The tcrypt hang could be also observed in following blocked-task dmesg: INFO: task modprobe:258 blocked for more than 120 seconds. Not tainted 4.6.0-rc4-next-20160419-00005-g9eac8b7b7753-dirty #42 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. modprobe D c06b09d8 0 258 256 0x00000000 [<c06b09d8>] (__schedule) from [<c06b0f24>] (schedule+0x40/0xac) [<c06b0f24>] (schedule) from [<c06b49f8>] (schedule_timeout+0x124/0x178) [<c06b49f8>] (schedule_timeout) from [<c06b17fc>] (wait_for_common+0xb8/0x144) [<c06b17fc>] (wait_for_common) from [<bf0013b8>] (test_acipher_speed+0x49c/0x740 [tcrypt]) [<bf0013b8>] (test_acipher_speed [tcrypt]) from [<bf003e8c>] (do_test+0x2240/0x30ec [tcrypt]) [<bf003e8c>] (do_test [tcrypt]) from [<bf008048>] (tcrypt_mod_init+0x48/0xa4 [tcrypt]) [<bf008048>] (tcrypt_mod_init [tcrypt]) from [<c010177c>] (do_one_initcall+0x3c/0x16c) [<c010177c>] (do_one_initcall) from [<c0191ff0>] (do_init_module+0x5c/0x1ac) [<c0191ff0>] (do_init_module) from [<c0185610>] (load_module+0x1a30/0x1d08) [<c0185610>] (load_module) from [<c0185ab0>] (SyS_finit_module+0x8c/0x98) [<c0185ab0>] (SyS_finit_module) from [<c01078c0>] (ret_fast_syscall+0x0/0x3c) Fixes: a49e490c ("crypto: s5p-sss - add S5PV210 advanced crypto engine support") Signed-off-by:
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Jan Kara authored
commit 06bd3c36 upstream. Huang has reported that in his powerfail testing he is seeing stale block contents in some of recently allocated blocks although he mounts ext4 in data=ordered mode. After some investigation I have found out that indeed when delayed allocation is used, we don't add inode to transaction's list of inodes needing flushing before commit. Originally we were doing that but commit f3b59291 removed the logic with a flawed argument that it is not needed. The problem is that although for delayed allocated blocks we write their contents immediately after allocating them, there is no guarantee that the IO scheduler or device doesn't reorder things and thus transaction allocating blocks and attaching them to inode can reach stable storage before actual block contents. Actually whenever we attach freshly allocated blocks to inode using a written extent, we should add inode to transaction's ordered inode list to make sure we properly wait for block contents to be written before committing the transaction. So that is what we do in this patch. This also handles other cases where stale data exposure was possible - like filling hole via mmap in data=ordered,nodelalloc mode. The only exception to the above rule are extending direct IO writes where blkdev_direct_IO() waits for IO to complete before increasing i_size and thus stale data exposure is not possible. For now we don't complicate the code with optimizing this special case since the overhead is pretty low. In case this is observed to be a performance problem we can always handle it using a special flag to ext4_map_blocks(). Fixes: f3b59291Reported-by:
"HUANG Weller (CM/ESW12-CN)" <Weller.Huang@cn.bosch.com> Tested-by:
Jan Kara <jack@suse.cz> Signed-off-by:
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Emmanouil Maroudas authored
commit 993f88f1 upstream. Fix typo in edac_inc_ue_error() to increment ue_noinfo_count instead of ce_noinfo_count. Signed-off-by:
Emmanouil Maroudas <emmanouil.maroudas@gmail.com> Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Cc: linux-edac <linux-edac@vger.kernel.org> Fixes: 4275be63 ("edac: Change internal representation to work with layers") Link: http://lkml.kernel.org/r/1461425580-5898-1-git-send-email-emmanouil.maroudas@gmail.comSigned-off-by:
Borislav Petkov <bp@suse.de> Signed-off-by:
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Ulf Hansson authored
commit 0ae3aeef upstream. As pm_runtime_set_active() may fail because the device's parent isn't active, we can end up executing the ->runtime_resume() callback for the device when it isn't allowed. Fix this by invoking pm_runtime_set_active() before running the callback and let's also deal with the error code. Fixes: 37f20416 (PM: Add pm_runtime_suspend|resume_force functions) Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Hari Bathini authored
commit 8ed8ab40 upstream. Some of the interrupt vectors on 64-bit POWER server processors are only 32 bytes long (8 instructions), which is not enough for the full first-level interrupt handler. For these we need to branch to an out-of-line (OOL) handler. But when we are running a relocatable kernel, interrupt vectors till __end_interrupts marker are copied down to real address 0x100. So, branching to labels (ie. OOL handlers) outside this section must be handled differently (see LOAD_HANDLER()), considering relocatable kernel, which would need at least 4 instructions. However, branching from interrupt vector means that we corrupt the CFAR (come-from address register) on POWER7 and later processors as mentioned in commit 1707dd16. So, EXCEPTION_PROLOG_0 (6 instructions) that contains the part up to the point where the CFAR is saved in the PACA should be part of the short interrupt vectors before we branch out to OOL handlers. But as mentioned already, there are interrupt vectors on 64-bit POWER server processors that are only 32 bytes long (like vectors 0x4f00, 0x4f20, etc.), which cannot accomodate the above two cases at the same time owing to space constraint. Currently, in these interrupt vectors, we simply branch out to OOL handlers, without using LOAD_HANDLER(), which leaves us vulnerable when running a relocatable kernel (eg. kdump case). While this has been the case for sometime now and kdump is used widely, we were fortunate not to see any problems so far, for three reasons: 1. In almost all cases, production kernel (relocatable) is used for kdump as well, which would mean that crashed kernel's OOL handler would be at the same place where we end up branching to, from short interrupt vector of kdump kernel. 2. Also, OOL handler was unlikely the reason for crash in almost all the kdump scenarios, which meant we had a sane OOL handler from crashed kernel that we branched to. 3. On most 64-bit POWER server processors, page size is large enough that marking interrupt vector code as executable (see commit 429d2e83) leads to marking OOL handler code from crashed kernel, that sits right below interrupt vector code from kdump kernel, as executable as well. Let us fix this by moving the __end_interrupts marker down past OOL handlers to make sure that we also copy OOL handlers to real address 0x100 when running a relocatable kernel. This fix has been tested successfully in kdump scenario, on an LPAR with 4K page size by using different default/production kernel and kdump kernel. Also tested by manually corrupting the OOL handlers in the first kernel and then kdump'ing, and then causing the OOL handlers to fire - mpe. Fixes: c1fb6816 ("powerpc: Add relocation on exception vector handlers") Signed-off-by:
Hari Bathini <hbathini@linux.vnet.ibm.com> Signed-off-by:
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Takashi Iwai authored
commit c7c999cb upstream. hci_vhci driver creates a hci device object dynamically upon each HCI_VENDOR_PKT write. Although it checks the already created object and returns an error, it's still racy and may build multiple hci_dev objects concurrently when parallel writes are performed, as the device tracks only a single hci_dev object. This patch introduces a mutex to protect against the concurrent device creations. Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
Marcel Holtmann <marcel@holtmann.org> [bwh: Backported to 3.16: adjust context] Signed-off-by:
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Geert Uytterhoeven authored
commit d124fd3b upstream. Commit 834392a7 ("serial: doc: Un-document non-existing uart_write_console()") removed a paragraph about a helper function that seemed to never exist. Peter Hurley pointed out that the function does exist, but is called differently. Re-add the paragraph, with the function name corrected. Fixes: 834392a7 ("serial: doc: Un-document non-existing uart_write_console()") Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by:
Jonathan Corbet <corbet@lwn.net> Signed-off-by:
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Johannes Thumshirn authored
commit 305c2e71 upstream. Now that we've done a more comprehensive fix with the intermediate target state we can remove the previous hack introduced with commit 90a88d6e ("scsi: fix soft lockup in scsi_remove_target() on module removal"). Signed-off-by:
Ewan D. Milne <emilne@redhat.com> Reviewed-by:
Hannes Reinecke <hare@suse.com> Signed-off-by:
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Johannes Thumshirn authored
commit f05795d3 upstream. Add intermediate STARGET_REMOVE state to scsi_target_state to avoid running into the BUG_ON() in scsi_target_reap(). The STARGET_REMOVE state is only valid in the path from scsi_remove_target() to scsi_target_destroy() indicating this target is going to be removed. This re-fixes the problem introduced in commits bc3f02a7 ("[SCSI] scsi_remove_target: fix softlockup regression on hot remove") and 40998193 ("scsi: restart list search after unlock in scsi_remove_target") in a more comprehensive way. [mkp: Included James' fix for scsi_target_destroy()] Signed-off-by:
Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Tested-by:
James Bottomley <jejb@linux.vnet.ibm.com> Signed-off-by:
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Chris Wilson authored
commit e9135c4f upstream. Two concurrent writes into the same register cacheline has the chance of killing the machine on Ivybridge and other gen7. This includes LRI emitted from the command parser. The MI_SET_CONTEXT itself serves as serialising barrier and prevents the pair of register writes in the first packet from triggering the fault. However, if a second switch-context immediately occurs then we may have two adjacent blocks of LRI to the same registers which may then trigger the hang. To counteract this we need to insert a delay after the second register write using SRM. This is easiest to reproduce with something like igt/gem_ctx_switch/interruptible that triggers back-to-back context switches (with no operations in between them in the command stream, which requires the execbuf operation to be interrupted after the MI_SET_CONTEXT) but can be observed sporadically elsewhere when running interruptible igt. No reports from the wild though, so it must be of low enough frequency that no one has correlated the random machine freezes with i915.ko The issue was introduced with commit 2c550183 [v3.19] Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Tue Dec 16 10:02:27 2014 +0000 drm/i915: Disable PSMI sleep messages on all rings around context switches Testcase: igt/gem_ctx_switch/render-interruptible #ivb Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
Daniel Vetter <daniel@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1460565315-7748-11-git-send-email-chris@chris-wilson.co.uk [bwh: Backported to 3.16: - Pass ring, not engine, to intel_ring_emit() - Register type is u32 not i915_reg_t - MI_STORE_REGISTER_MEM is a function-macro] Signed-off-by:
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Daniel Borkmann authored
commit 47e27d5e upstream. The original tokenized iid support implemented via f53adae4 ("net: ipv6: add tokenized interface identifier support") didn't allow for clearing a device token as it was intended that this addressing mode was the only one active for globally scoped IPv6 addresses. Later we relaxed that restriction via 617fe29d ("net: ipv6: only invalidate previously tokenized addresses"), and we should also allow for clearing tokens as there's no good reason why it shouldn't be allowed. Fixes: 617fe29d ("net: ipv6: only invalidate previously tokenized addresses") Reported-by:
Robin H. Johnson <robbat2@gentoo.org> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
David S. Miller <davem@davemloft.net> [bwh: Backported to 3.16: adjust context] Signed-off-by:
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Dan Carpenter authored
commit 60587bd0 upstream. The "handled" variable could be uninitialized if the interrupt_service_routine() call back hasn't been implimented or if it has been implemented but doesn't initialize "handled" to zero at the start. For example, adv76xx_isr() only sets "handled" to true. Fixes: 44b153ca ('[media] m5mols: Add ISO sensitivity controls') Signed-off-by:
Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by:
Mauro Carvalho Chehab <mchehab@osg.samsung.com> Signed-off-by:
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Dan Carpenter authored
commit 22aab38e upstream. Instead to being true/false, the "handled" is true/uninitialized. Presumably this doesn't cause that many problems in real life because normally we handle the IRQ. Fixes: eea6b7cc ('mfd: Add lp8788 mfd driver') Signed-off-by:
Milo Kim <milo.kim@ti.com> Signed-off-by:
Lee Jones <lee.jones@linaro.org> Signed-off-by:
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Suman Anna authored
commit c20c8f75 upstream. The omap_hwmod _enable() function can return success without setting the hwmod state to _HWMOD_STATE_ENABLED for IPs with reset lines when all of the reset lines are asserted. The omap_hwmod _idle() function also performs a similar check, but after checking for the hwmod state first. This triggers the WARN when pm_runtime_get and pm_runtime_put are invoked on IPs with all reset lines asserted. Reverse the checks for hwmod state and reset lines status to fix this. Issue found during a unbind operation on a device with reset lines still asserted, example backtrace below ------------[ cut here ]------------ WARNING: CPU: 1 PID: 879 at arch/arm/mach-omap2/omap_hwmod.c:2207 _idle+0x1e4/0x240() omap_hwmod: mmu_dsp: idle state can only be entered from enabled state Modules linked in: CPU: 1 PID: 879 Comm: sh Not tainted 4.4.0-00008-ga989d951331a #3 Hardware name: Generic OMAP5 (Flattened Device Tree) [<c0018e60>] (unwind_backtrace) from [<c0014dc4>] (show_stack+0x10/0x14) [<c0014dc4>] (show_stack) from [<c037ac28>] (dump_stack+0x90/0xc0) [<c037ac28>] (dump_stack) from [<c003f420>] (warn_slowpath_common+0x78/0xb4) [<c003f420>] (warn_slowpath_common) from [<c003f48c>] (warn_slowpath_fmt+0x30/0x40) [<c003f48c>] (warn_slowpath_fmt) from [<c0028c20>] (_idle+0x1e4/0x240) [<c0028c20>] (_idle) from [<c0029080>] (omap_hwmod_idle+0x28/0x48) [<c0029080>] (omap_hwmod_idle) from [<c002a5a4>] (omap_device_idle+0x3c/0x90) [<c002a5a4>] (omap_device_idle) from [<c0427a90>] (__rpm_callback+0x2c/0x60) [<c0427a90>] (__rpm_callback) from [<c0427ae4>] (rpm_callback+0x20/0x80) [<c0427ae4>] (rpm_callback) from [<c0427f84>] (rpm_suspend+0x138/0x74c) [<c0427f84>] (rpm_suspend) from [<c0428b78>] (__pm_runtime_idle+0x78/0xa8) [<c0428b78>] (__pm_runtime_idle) from [<c041f514>] (__device_release_driver+0x64/0x100) [<c041f514>] (__device_release_driver) from [<c041f5d0>] (device_release_driver+0x20/0x2c) [<c041f5d0>] (device_release_driver) from [<c041d85c>] (unbind_store+0x78/0xf8) [<c041d85c>] (unbind_store) from [<c0206df8>] (kernfs_fop_write+0xc0/0x1c4) [<c0206df8>] (kernfs_fop_write) from [<c018a120>] (__vfs_write+0x20/0xdc) [<c018a120>] (__vfs_write) from [<c018a9cc>] (vfs_write+0x90/0x164) [<c018a9cc>] (vfs_write) from [<c018b1f0>] (SyS_write+0x44/0x9c) [<c018b1f0>] (SyS_write) from [<c0010420>] (ret_fast_syscall+0x0/0x1c) ---[ end trace a4182013c75a9f50 ]--- While at this, fix the sequence in _shutdown() as well, though there is no easy reproducible scenario. Fixes: 747834ab ("ARM: OMAP2+: hwmod: revise hardreset behavior") Signed-off-by:
Suman Anna <s-anna@ti.com> Signed-off-by:
Paul Walmsley <paul@pwsan.com> Signed-off-by:
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Dave Gerlach authored
commit c998c078 upstream. Currently the 'registered' member of the cpuidle_device struct is set to 1 during cpuidle_register_device. In this same function there are checks to see if the device is already registered to prevent duplicate calls to register the device, but this value is never set to 0 even on unregister of the device. Because of this, any attempt to call cpuidle_register_device after a call to cpuidle_unregister_device will fail which shouldn't be the case. To prevent this, set registered to 0 when the device is unregistered. Fixes: c878a52d (cpuidle: Check if device is already registered) Signed-off-by:
Dave Gerlach <d-gerlach@ti.com> Acked-by:
Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by:
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Jiri Slaby authored
commit 13407376 upstream. The write handler allocates skbs and queues them into data->readq. Read side should read them, if there is any. If there is none, skbs should be dropped by hdev->flush. But this happens only if the device is HCI_UP, i.e. hdev->power_on work was triggered already. When it was not, skbs stay allocated in the queue when /dev/vhci is closed. So purge the queue in ->release. Program to reproduce: #include <err.h> #include <fcntl.h> #include <stdio.h> #include <unistd.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/uio.h> int main() { char buf[] = { 0xff, 0 }; struct iovec iov = { .iov_base = buf, .iov_len = sizeof(buf), }; int fd; while (1) { fd = open("/dev/vhci", O_RDWR); if (fd < 0) err(1, "open"); usleep(50); if (writev(fd, &iov, 1) < 0) err(1, "writev"); usleep(50); close(fd); } return 0; } Result: kmemleak: 4609 new suspected memory leaks unreferenced object 0xffff88059f4d5440 (size 232): comm "vhci", pid 1084, jiffies 4294912542 (age 37569.296s) hex dump (first 32 bytes): 20 f0 23 87 05 88 ff ff 20 f0 23 87 05 88 ff ff .#..... .#..... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: ... [<ffffffff81ece010>] __alloc_skb+0x0/0x5a0 [<ffffffffa021886c>] vhci_create_device+0x5c/0x580 [hci_vhci] [<ffffffffa0219436>] vhci_write+0x306/0x4c8 [hci_vhci] Fixes: 23424c0d (Bluetooth: Add support creating virtual AMP controllers) Signed-off-by:
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Jiri Slaby authored
commit 373a32c8 upstream. Both vhci_get_user and vhci_release race with open_timeout work. They both contain cancel_delayed_work_sync, but do not test whether the work actually created hdev or not. Since the work can be in progress and _sync will wait for finishing it, we can have data->hdev allocated when cancel_delayed_work_sync returns. But the call sites do 'if (data->hdev)' *before* cancel_delayed_work_sync. As a result: * vhci_get_user allocates a second hdev and puts it into data->hdev. The former is leaked. * vhci_release does not release data->hdev properly as it thinks there is none. Fix both cases by moving the actual test *after* the call to cancel_delayed_work_sync. This can be hit by this program: #include <err.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <time.h> #include <unistd.h> #include <sys/stat.h> #include <sys/types.h> int main(int argc, char **argv) { int fd; srand(time(NULL)); while (1) { const int delta = (rand() % 200 - 100) * 100; fd = open("/dev/vhci", O_RDWR); if (fd < 0) err(1, "open"); usleep(1000000 + delta); close(fd); } return 0; } And the result is: BUG: KASAN: use-after-free in skb_queue_tail+0x13e/0x150 at addr ffff88006b0c1228 Read of size 8 by task kworker/u13:1/32068 ============================================================================= BUG kmalloc-192 (Tainted: G E ): kasan: bad access detected ----------------------------------------------------------------------------- Disabling lock debugging due to kernel taint INFO: Allocated in vhci_open+0x50/0x330 [hci_vhci] age=260 cpu=3 pid=32040 ... kmem_cache_alloc_trace+0x150/0x190 vhci_open+0x50/0x330 [hci_vhci] misc_open+0x35b/0x4e0 chrdev_open+0x23b/0x510 ... INFO: Freed in vhci_release+0xa4/0xd0 [hci_vhci] age=9 cpu=2 pid=32040 ... __slab_free+0x204/0x310 vhci_release+0xa4/0xd0 [hci_vhci] ... INFO: Slab 0xffffea0001ac3000 objects=16 used=13 fp=0xffff88006b0c1e00 flags=0x5fffff80004080 INFO: Object 0xffff88006b0c1200 @offset=4608 fp=0xffff88006b0c0600 Bytes b4 ffff88006b0c11f0: 09 df 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................ Object ffff88006b0c1200: 00 06 0c 6b 00 88 ff ff 00 00 00 00 00 00 00 00 ...k............ Object ffff88006b0c1210: 10 12 0c 6b 00 88 ff ff 10 12 0c 6b 00 88 ff ff ...k.......k.... Object ffff88006b0c1220: c0 46 c2 6b 00 88 ff ff c0 46 c2 6b 00 88 ff ff .F.k.....F.k.... Object ffff88006b0c1230: 01 00 00 00 01 00 00 00 e0 ff ff ff 0f 00 00 00 ................ Object ffff88006b0c1240: 40 12 0c 6b 00 88 ff ff 40 12 0c 6b 00 88 ff ff @..k....@..k.... Object ffff88006b0c1250: 50 0d 6e a0 ff ff ff ff 00 02 00 00 00 00 ad de P.n............. Object ffff88006b0c1260: 00 00 00 00 00 00 00 00 ab 62 02 00 01 00 00 00 .........b...... Object ffff88006b0c1270: 90 b9 19 81 ff ff ff ff 38 12 0c 6b 00 88 ff ff ........8..k.... Object ffff88006b0c1280: 03 00 20 00 ff ff ff ff ff ff ff ff 00 00 00 00 .. ............. Object ffff88006b0c1290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ Object ffff88006b0c12a0: 00 00 00 00 00 00 00 00 00 80 cd 3d 00 88 ff ff ...........=.... Object ffff88006b0c12b0: 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 . .............. Redzone ffff88006b0c12c0: bb bb bb bb bb bb bb bb ........ Padding ffff88006b0c13f8: 00 00 00 00 00 00 00 00 ........ CPU: 3 PID: 32068 Comm: kworker/u13:1 Tainted: G B E 4.4.6-0-default #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.1-0-g4adadbd-20151112_172657-sheep25 04/01/2014 Workqueue: hci0 hci_cmd_work [bluetooth] 00000000ffffffff ffffffff81926cfa ffff88006be37c68 ffff88006bc27180 ffff88006b0c1200 ffff88006b0c1234 ffffffff81577993 ffffffff82489320 ffff88006bc24240 0000000000000046 ffff88006a100000 000000026e51eb80 Call Trace: ... [<ffffffff81ec8ebe>] ? skb_queue_tail+0x13e/0x150 [<ffffffffa06e027c>] ? vhci_send_frame+0xac/0x100 [hci_vhci] [<ffffffffa0c61268>] ? hci_send_frame+0x188/0x320 [bluetooth] [<ffffffffa0c61515>] ? hci_cmd_work+0x115/0x310 [bluetooth] [<ffffffff811a1375>] ? process_one_work+0x815/0x1340 [<ffffffff811a1f85>] ? worker_thread+0xe5/0x11f0 [<ffffffff811a1ea0>] ? process_one_work+0x1340/0x1340 [<ffffffff811b3c68>] ? kthread+0x1c8/0x230 ... Memory state around the buggy address: ffff88006b0c1100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88006b0c1180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88006b0c1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88006b0c1280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88006b0c1300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc Fixes: 23424c0d (Bluetooth: Add support creating virtual AMP controllers) Signed-off-by:
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Itai Handler authored
commit 7ccca1d5 upstream. Fix possible out of bounds read, by adding missing comma. The code may read pass the end of the dsi_errors array when the most significant bit (bit #31) in the intr_stat register is set. This bug has been detected using CppCheck (static analysis tool). Signed-off-by:
Itai Handler <itai_handler@hotmail.com> Signed-off-by:
Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by:
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Eric Sandeen authored
commit d0a58e83 upstream. Today, a kernel which refuses to mount a filesystem read-write due to unknown ro-compat features can still transition to read-write via the remount path. The old kernel is most likely none the wiser, because it's unaware of the new feature, and isn't using it. However, writing to the filesystem may well corrupt metadata related to that new feature, and moving to a newer kernel which understand the feature will have problems. Right now the only ro-compat feature we have is the free inode btree, which showed up in v3.16. It would be good to push this back to all the active stable kernels, I think, so that if anyone is using newer mkfs (which enables the finobt feature) with older kernel releases, they'll be protected. Signed-off-by:
Eric Sandeen <sandeen@redhat.com> Reviewed-by:
Bill O'Donnell <billodo@redhat.com> Reviewed-by:
Dave Chinner <dchinner@redhat.com> Signed-off-by:
Dave Chinner <david@fromorbit.com> [bwh: Backported to 3.16: adjust context] Signed-off-by:
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