- 20 4月, 2019 8 次提交
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由 Kangjie Lu 提交于
[ Upstream commit 6ade657d6125ec3ec07f95fa51e28138aef6208f ] In case ioremap_nocache fails, the fix releases chip and returns an error code upstream to avoid NULL pointer dereference. Signed-off-by: NKangjie Lu <kjlu@umn.edu> Signed-off-by: NTakashi Iwai <tiwai@suse.de> Signed-off-by: NSasha Levin <sashal@kernel.org>
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由 Lukas Czerner 提交于
[ Upstream commit 6c7328400e0488f7d49e19e02290ba343b6811b2 ] Currently when the file system resize using ext4_resize_fs() fails it will report into log that "resized filesystem to <requested block count>". However this may not be true in the case of failure. Use the current block count as returned by ext4_blocks_count() to report the block count. Additionally, report a warning that "error occurred during file system resize" Signed-off-by: NLukas Czerner <lczerner@redhat.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Signed-off-by: NSasha Levin <sashal@kernel.org>
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由 Lukas Czerner 提交于
[ Upstream commit d64264d6218e6892edd832dc3a5a5857c2856c53 ] Currently in add_new_gdb_meta_bg() there is a missing brelse of gdb_bh in case ext4_journal_get_write_access() fails. Additionally kvfree() is missing in the same error path. Fix it by moving the ext4_journal_get_write_access() before the ext4 sb update as Ted suggested and release n_group_desc and gdb_bh in case it fails. Fixes: 61a9c11e5e7a ("ext4: add missing brelse() add_new_gdb_meta_bg()'s error path") Signed-off-by: NLukas Czerner <lczerner@redhat.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Signed-off-by: NSasha Levin <sashal@kernel.org>
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由 Jan Kara 提交于
[ Upstream commit 1dc1097ff60e4105216da7cd0aa99032b039a994 ] When admin calls "reboot -f" - i.e., does a hard system reboot by directly calling reboot(2) - ext4 filesystem mounted with errors=panic can panic the system. This happens because the underlying device gets disabled without unmounting the filesystem and thus some syscall running in parallel to reboot(2) can result in the filesystem getting IO errors. This is somewhat surprising to the users so try improve the behavior by switching to errors=remount-ro behavior when the system is running reboot(2). Signed-off-by: NJan Kara <jack@suse.cz> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Signed-off-by: NSasha Levin <sashal@kernel.org>
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由 Stephane Eranian 提交于
[ Upstream commit d9c1bb2f6a2157b38e8eb63af437cb22701d31ee ] On mmap(), perf_events generates a RECORD_MMAP record and then checks which events are interested in this record. There are currently 2 versions of mmap records: RECORD_MMAP and RECORD_MMAP2. MMAP2 is larger. The event configuration controls which version the user level tool accepts. If the event->attr.mmap2=1 field then MMAP2 record is returned. The perf_event_mmap_output() takes care of this. It checks attr->mmap2 and corrects the record fields before putting it in the sampling buffer of the event. At the end the function restores the modified MMAP record fields. The problem is that the function restores the size but not the type. Thus, if a subsequent event only accepts MMAP type, then it would instead receive an MMAP2 record with a size of MMAP record. This patch fixes the problem by restoring the record type on exit. Signed-off-by: NStephane Eranian <eranian@google.com> Acked-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Fixes: 13d7a241 ("perf: Add attr->mmap2 attribute to an event") Link: http://lkml.kernel.org/r/20190307185233.225521-1-eranian@google.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: NSasha Levin <sashal@kernel.org>
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由 ZhangXiaoxu 提交于
[ Upstream commit 62c9d2674b31d4c8a674bee86b7edc6da2803aea ] Commit 4d97f7d5 ("inotify: Add flag IN_MASK_CREATE for inotify_add_watch()") forgot to call fsnotify_put_mark() with IN_MASK_CREATE after fsnotify_find_mark() Fixes: 4d97f7d5 ("inotify: Add flag IN_MASK_CREATE for inotify_add_watch()") Signed-off-by: NZhangXiaoxu <zhangxiaoxu5@huawei.com> Signed-off-by: NJan Kara <jack@suse.cz> Signed-off-by: NSasha Levin <sashal@kernel.org>
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由 Corentin Labbe 提交于
[ Upstream commit 0728aeb7ead99a9b0dac2f3c92b3752b4e02ff97 ] We have now a HSDK device in our kernelci lab, but kernel builded via the hsdk_defconfig lacks ramfs supports, so it cannot boot kernelci jobs yet. So this patch enable CONFIG_BLK_DEV_RAM in hsdk_defconfig. Signed-off-by: NCorentin Labbe <clabbe@baylibre.com> Acked-by: NAlexey Brodkin <abrodkin@synopsys.com> Signed-off-by: NVineet Gupta <vgupta@synopsys.com> Signed-off-by: NSasha Levin <sashal@kernel.org>
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由 Eugeniy Paltsev 提交于
[ Upstream commit edb64bca50cd736c6894cc6081d5263c007ce005 ] In case of devboards we really often disable bootloader and load Linux image in memory via JTAG. Even if kernel tries to verify uboot_tag and uboot_arg there is sill a chance that we treat some garbage in registers as valid u-boot arguments in JTAG case. E.g. it is enough to have '1' in r0 to treat any value in r2 as a boot command line. So check that magic number passed from u-boot is correct and drop u-boot arguments otherwise. That helps to reduce the possibility of using garbage as u-boot arguments in JTAG case. We can safely check U-boot magic value (0x0) in linux passed via r1 register as U-boot pass it from the beginning. So there is no backward-compatibility issues. Signed-off-by: NEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: NVineet Gupta <vgupta@synopsys.com> Signed-off-by: NSasha Levin <sashal@kernel.org>
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- 17 4月, 2019 32 次提交
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由 Greg Kroah-Hartman 提交于
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由 Marc Orr 提交于
commit c73f4c998e1fd4249b9edfa39e23f4fda2b9b041 upstream. Referring to the "VIRTUALIZING MSR-BASED APIC ACCESSES" chapter of the SDM, when "virtualize x2APIC mode" is 1 and "APIC-register virtualization" is 0, a RDMSR of 808H should return the VTPR from the virtual APIC page. However, for nested, KVM currently fails to disable the read intercept for this MSR. This means that a RDMSR exit takes precedence over "virtualize x2APIC mode", and KVM passes through L1's TPR to L2, instead of sourcing the value from L2's virtual APIC page. This patch fixes the issue by disabling the read intercept, in VMCS02, for the VTPR when "APIC-register virtualization" is 0. The issue described above and fix prescribed here, were verified with a related patch in kvm-unit-tests titled "Test VMX's virtualize x2APIC mode w/ nested". Signed-off-by: NMarc Orr <marcorr@google.com> Reviewed-by: NJim Mattson <jmattson@google.com> Fixes: c992384b ("KVM: vmx: speed up MSR bitmap merge") Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Marc Orr 提交于
commit acff78477b9b4f26ecdf65733a4ed77fe837e9dc upstream. The nested_vmx_prepare_msr_bitmap() function doesn't directly guard the x2APIC MSR intercepts with the "virtualize x2APIC mode" MSR. As a result, we discovered the potential for a buggy or malicious L1 to get access to L0's x2APIC MSRs, via an L2, as follows. 1. L1 executes WRMSR(IA32_SPEC_CTRL, 1). This causes the spec_ctrl variable, in nested_vmx_prepare_msr_bitmap() to become true. 2. L1 disables "virtualize x2APIC mode" in VMCS12. 3. L1 enables "APIC-register virtualization" in VMCS12. Now, KVM will set VMCS02's x2APIC MSR intercepts from VMCS12, and then set "virtualize x2APIC mode" to 0 in VMCS02. Oops. This patch closes the leak by explicitly guarding VMCS02's x2APIC MSR intercepts with VMCS12's "virtualize x2APIC mode" control. The scenario outlined above and fix prescribed here, were verified with a related patch in kvm-unit-tests titled "Add leak scenario to virt_x2apic_mode_test". Note, it looks like this issue may have been introduced inadvertently during a merge---see 15303ba5. Signed-off-by: NMarc Orr <marcorr@google.com> Reviewed-by: NJim Mattson <jmattson@google.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Erik Schmauss 提交于
commit 4abb951b73ff0a8a979113ef185651aa3c8da19b upstream. The table load process omitted adding the operation region address range to the global list. This omission is problematic because the OS queries the global list to check for address range conflicts before deciding which drivers to load. This commit may result in warning messages that look like the following: [ 7.871761] ACPI Warning: system_IO range 0x00000428-0x0000042F conflicts with op_region 0x00000400-0x0000047F (\PMIO) (20180531/utaddress-213) [ 7.871769] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver However, these messages do not signify regressions. It is a result of properly adding address ranges within the global address list. Link: https://bugzilla.kernel.org/show_bug.cgi?id=200011Tested-by: NJean-Marc Lenoir <archlinux@jihemel.com> Signed-off-by: NErik Schmauss <erik.schmauss@intel.com> Cc: All applicable <stable@vger.kernel.org> Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Tomohiro Mayama 提交于
commit a8772e5d826d0f61f8aa9c284b3ab49035d5273d upstream. This patch makes USB ports functioning again. Fixes: 955bebde ("arm64: dts: rockchip: add rk3328-rock64 board") Cc: stable@vger.kernel.org Suggested-by: NRobin Murphy <robin.murphy@arm.com> Signed-off-by: NTomohiro Mayama <parly-gh@iris.mystia.org> Tested-by: NKatsuhiro Suzuki <katsuhiro@katsuster.net> Signed-off-by: NHeiko Stuebner <heiko@sntech.de> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Katsuhiro Suzuki 提交于
commit ef05bcb60c1a8841e38c91923ba998181117a87c upstream. This patch fixes pin assign of vcc_host1_5v. This regulator is controlled by USB20_HOST_DRV signal. ROCK64 schematic says that GPIO0_A2 pin is used as USB20_HOST_DRV. GPIO0_D3 pin is for SPDIF_TX_M0. Signed-off-by: NKatsuhiro Suzuki <katsuhiro@katsuster.net> Signed-off-by: NHeiko Stuebner <heiko@sntech.de> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Mikulas Patocka 提交于
commit 4ed319c6ac08e9a28fca7ac188181ac122f4de84 upstream. dm-integrity will deadlock if overlapping I/O is issued to it, the bug was introduced by commit 724376a0 ("dm integrity: implement fair range locks"). Users rarely use overlapping I/O so this bug went undetected until now. Fix this bug by correcting, likely cut-n-paste, typos in ranges_overlap() and also remove a flawed ranges_overlap() check in remove_range_unlocked(). This condition could leave unprocessed bios hanging on wait_list forever. Cc: stable@vger.kernel.org # v4.19+ Fixes: 724376a0 ("dm integrity: implement fair range locks") Signed-off-by: NMikulas Patocka <mpatocka@redhat.com> Signed-off-by: NMike Snitzer <snitzer@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Ilya Dryomov 提交于
commit eb40c0acdc342b815d4d03ae6abb09e80c0f2988 upstream. Some devices don't use blk_integrity but still want stable pages because they do their own checksumming. Examples include rbd and iSCSI when data digests are negotiated. Stacking DM (and thus LVM) on top of these devices results in sporadic checksum errors. Set BDI_CAP_STABLE_WRITES if any underlying device has it set. Cc: stable@vger.kernel.org Signed-off-by: NIlya Dryomov <idryomov@gmail.com> Signed-off-by: NMike Snitzer <snitzer@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Mikulas Patocka 提交于
commit 75ae193626de3238ca5fb895868ec91c94e63b1b upstream. The limit was already incorporated to dm-crypt with commit 4e870e94 ("dm crypt: fix error with too large bios"), so we don't need to apply it globally to all targets. The quantity BIO_MAX_PAGES * PAGE_SIZE is wrong anyway because the variable ti->max_io_len it is supposed to be in the units of 512-byte sectors not in bytes. Reduction of the limit to 1048576 sectors could even cause data corruption in rare cases - suppose that we have a dm-striped device with stripe size 768MiB. The target will call dm_set_target_max_io_len with the value 1572864. The buggy code would reduce it to 1048576. Now, the dm-core will errorneously split the bios on 1048576-sector boundary insetad of 1572864-sector boundary and pass these stripe-crossing bios to the striped target. Cc: stable@vger.kernel.org # v4.16+ Fixes: 8f50e358 ("dm: limit the max bio size as BIO_MAX_PAGES * PAGE_SIZE") Signed-off-by: NMikulas Patocka <mpatocka@redhat.com> Acked-by: NMing Lei <ming.lei@redhat.com> Signed-off-by: NMike Snitzer <snitzer@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Mikulas Patocka 提交于
commit 0d74e6a3b6421d98eeafbed26f29156d469bc0b5 upstream. If the string opt_string is small, the function memcmp can access bytes that are beyond the terminating nul character. In theory, it could cause segfault, if opt_string were located just below some unmapped memory. Change from memcmp to strncmp so that we don't read bytes beyond the end of the string. Cc: stable@vger.kernel.org # v4.12+ Signed-off-by: NMikulas Patocka <mpatocka@redhat.com> Signed-off-by: NMike Snitzer <snitzer@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Sergey Miroshnichenko 提交于
commit 3943af9d01e94330d0cfac6fccdbc829aad50c92 upstream. During a safe hot remove, the OS powers off the slot, which may cause a Data Link Layer State Changed event. The slot has already been set to OFF_STATE, so that event results in re-enabling the device, making it impossible to safely remove it. Clear out the Presence Detect Changed and Data Link Layer State Changed events when the disabled slot has settled down. It is still possible to re-enable the device if it remains in the slot after pressing the Attention Button by pressing it again. Fixes the problem that Micah reported below: an NVMe drive power button may not actually turn off the drive. Link: https://bugzilla.kernel.org/show_bug.cgi?id=203237Reported-by: NMicah Parrish <micah.parrish@hpe.com> Tested-by: NMicah Parrish <micah.parrish@hpe.com> Signed-off-by: NSergey Miroshnichenko <s.miroshnichenko@yadro.com> [bhelgaas: changelog, add bugzilla URL] Signed-off-by: NBjorn Helgaas <bhelgaas@google.com> Reviewed-by: NLukas Wunner <lukas@wunner.de> Cc: stable@vger.kernel.org # v4.19+ Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Andre Przywara 提交于
commit 9cde402a59770a0669d895399c13407f63d7d209 upstream. There is a Marvell 88SE9170 PCIe SATA controller I found on a board here. Some quick testing with the ARM SMMU enabled reveals that it suffers from the same requester ID mixup problems as the other Marvell chips listed already. Add the PCI vendor/device ID to the list of chips which need the workaround. Signed-off-by: NAndre Przywara <andre.przywara@arm.com> Signed-off-by: NBjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Lendacky, Thomas 提交于
commit 3966c3feca3fd10b2935caa0b4a08c7dd59469e5 upstream. Spurious interrupt support was added to perf in the following commit, almost a decade ago: 63e6be6d ("perf, x86: Catch spurious interrupts after disabling counters") The two previous patches (resolving the race condition when disabling a PMC and NMI latency mitigation) allow for the removal of this older spurious interrupt support. Currently in x86_pmu_stop(), the bit for the PMC in the active_mask bitmap is cleared before disabling the PMC, which sets up a race condition. This race condition was mitigated by introducing the running bitmap. That race condition can be eliminated by first disabling the PMC, waiting for PMC reset on overflow and then clearing the bit for the PMC in the active_mask bitmap. The NMI handler will not re-enable a disabled counter. If x86_pmu_stop() is called from the perf NMI handler, the NMI latency mitigation support will guard against any unhandled NMI messages. Signed-off-by: NTom Lendacky <thomas.lendacky@amd.com> Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Cc: <stable@vger.kernel.org> # 4.14.x- Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: https://lkml.kernel.org/r/Message-ID: Signed-off-by: NIngo Molnar <mingo@kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Lendacky, Thomas 提交于
commit 6d3edaae16c6c7d238360f2841212c2b26774d5e upstream. On AMD processors, the detection of an overflowed PMC counter in the NMI handler relies on the current value of the PMC. So, for example, to check for overflow on a 48-bit counter, bit 47 is checked to see if it is 1 (not overflowed) or 0 (overflowed). When the perf NMI handler executes it does not know in advance which PMC counters have overflowed. As such, the NMI handler will process all active PMC counters that have overflowed. NMI latency in newer AMD processors can result in multiple overflowed PMC counters being processed in one NMI and then a subsequent NMI, that does not appear to be a back-to-back NMI, not finding any PMC counters that have overflowed. This may appear to be an unhandled NMI resulting in either a panic or a series of messages, depending on how the kernel was configured. To mitigate this issue, add an AMD handle_irq callback function, amd_pmu_handle_irq(), that will invoke the common x86_pmu_handle_irq() function and upon return perform some additional processing that will indicate if the NMI has been handled or would have been handled had an earlier NMI not handled the overflowed PMC. Using a per-CPU variable, a minimum value of the number of active PMCs or 2 will be set whenever a PMC is active. This is used to indicate the possible number of NMIs that can still occur. The value of 2 is used for when an NMI does not arrive at the LAPIC in time to be collapsed into an already pending NMI. Each time the function is called without having handled an overflowed counter, the per-CPU value is checked. If the value is non-zero, it is decremented and the NMI indicates that it handled the NMI. If the value is zero, then the NMI indicates that it did not handle the NMI. Signed-off-by: NTom Lendacky <thomas.lendacky@amd.com> Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Cc: <stable@vger.kernel.org> # 4.14.x- Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: https://lkml.kernel.org/r/Message-ID: Signed-off-by: NIngo Molnar <mingo@kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Lendacky, Thomas 提交于
commit 914123fa39042e651d79eaf86bbf63a1b938dddf upstream. On AMD processors, the detection of an overflowed counter in the NMI handler relies on the current value of the counter. So, for example, to check for overflow on a 48 bit counter, bit 47 is checked to see if it is 1 (not overflowed) or 0 (overflowed). There is currently a race condition present when disabling and then updating the PMC. Increased NMI latency in newer AMD processors makes this race condition more pronounced. If the counter value has overflowed, it is possible to update the PMC value before the NMI handler can run. The updated PMC value is not an overflowed value, so when the perf NMI handler does run, it will not find an overflowed counter. This may appear as an unknown NMI resulting in either a panic or a series of messages, depending on how the kernel is configured. To eliminate this race condition, the PMC value must be checked after disabling the counter. Add an AMD function, amd_pmu_disable_all(), that will wait for the NMI handler to reset any active and overflowed counter after calling x86_pmu_disable_all(). Signed-off-by: NTom Lendacky <thomas.lendacky@amd.com> Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Cc: <stable@vger.kernel.org> # 4.14.x- Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: https://lkml.kernel.org/r/Message-ID: Signed-off-by: NIngo Molnar <mingo@kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Alexander Potapenko 提交于
commit 5b77e95dd7790ff6c8fbf1cd8d0104ebed818a03 upstream. There's a number of problems with how arch/x86/include/asm/bitops.h is currently using assembly constraints for the memory region bitops are modifying: 1) Use memory clobber in bitops that touch arbitrary memory Certain bit operations that read/write bits take a base pointer and an arbitrarily large offset to address the bit relative to that base. Inline assembly constraints aren't expressive enough to tell the compiler that the assembly directive is going to touch a specific memory location of unknown size, therefore we have to use the "memory" clobber to indicate that the assembly is going to access memory locations other than those listed in the inputs/outputs. To indicate that BTR/BTS instructions don't necessarily touch the first sizeof(long) bytes of the argument, we also move the address to assembly inputs. This particular change leads to size increase of 124 kernel functions in a defconfig build. For some of them the diff is in NOP operations, other end up re-reading values from memory and may potentially slow down the execution. But without these clobbers the compiler is free to cache the contents of the bitmaps and use them as if they weren't changed by the inline assembly. 2) Use byte-sized arguments for operations touching single bytes. Passing a long value to ANDB/ORB/XORB instructions makes the compiler treat sizeof(long) bytes as being clobbered, which isn't the case. This may theoretically lead to worse code in the case of heavy optimization. Practical impact: I've built a defconfig kernel and looked through some of the functions generated by GCC 7.3.0 with and without this clobber, and didn't spot any miscompilations. However there is a (trivial) theoretical case where this code leads to miscompilation: https://lkml.org/lkml/2019/3/28/393 using just GCC 8.3.0 with -O2. It isn't hard to imagine someone writes such a function in the kernel someday. So the primary motivation is to fix an existing misuse of the asm directive, which happens to work in certain configurations now, but isn't guaranteed to work under different circumstances. [ --mingo: Added -stable tag because defconfig only builds a fraction of the kernel and the trivial testcase looks normal enough to be used in existing or in-development code. ] Signed-off-by: NAlexander Potapenko <glider@google.com> Cc: <stable@vger.kernel.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: James Y Knight <jyknight@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20190402112813.193378-1-glider@google.com [ Edited the changelog, tidied up one of the defines. ] Signed-off-by: NIngo Molnar <mingo@kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Rasmus Villemoes 提交于
commit 88ca66d8540ca26119b1428cddb96b37925bdf01 upstream. The minimum supported gcc version is >= 4.6, so these can be removed. Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: NBorislav Petkov <bp@suse.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/20190111084931.24601-1-linux@rasmusvillemoes.dkSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Max Filippov 提交于
commit ada770b1e74a77fff2d5f539bf6c42c25f4784db upstream. return_address returns the address that is one level higher in the call stack than requested in its argument, because level 0 corresponds to its caller's return address. Use requested level as the number of stack frames to skip. This fixes the address reported by might_sleep and friends. Cc: stable@vger.kernel.org Signed-off-by: NMax Filippov <jcmvbkbc@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Mel Gorman 提交于
commit 0e9f02450da07fc7b1346c8c32c771555173e397 upstream. A NULL pointer dereference bug was reported on a distribution kernel but the same issue should be present on mainline kernel. It occured on s390 but should not be arch-specific. A partial oops looks like: Unable to handle kernel pointer dereference in virtual kernel address space ... Call Trace: ... try_to_wake_up+0xfc/0x450 vhost_poll_wakeup+0x3a/0x50 [vhost] __wake_up_common+0xbc/0x178 __wake_up_common_lock+0x9e/0x160 __wake_up_sync_key+0x4e/0x60 sock_def_readable+0x5e/0x98 The bug hits any time between 1 hour to 3 days. The dereference occurs in update_cfs_rq_h_load when accumulating h_load. The problem is that cfq_rq->h_load_next is not protected by any locking and can be updated by parallel calls to task_h_load. Depending on the compiler, code may be generated that re-reads cfq_rq->h_load_next after the check for NULL and then oops when reading se->avg.load_avg. The dissassembly showed that it was possible to reread h_load_next after the check for NULL. While this does not appear to be an issue for later compilers, it's still an accident if the correct code is generated. Full locking in this path would have high overhead so this patch uses READ_ONCE to read h_load_next only once and check for NULL before dereferencing. It was confirmed that there were no further oops after 10 days of testing. As Peter pointed out, it is also necessary to use WRITE_ONCE() to avoid any potential problems with store tearing. Signed-off-by: NMel Gorman <mgorman@techsingularity.net> Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: NValentin Schneider <valentin.schneider@arm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: <stable@vger.kernel.org> Fixes: 68520796 ("sched: Move h_load calculation to task_h_load()") Link: https://lkml.kernel.org/r/20190319123610.nsivgf3mjbjjesxb@techsingularity.netSigned-off-by: NIngo Molnar <mingo@kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Dan Carpenter 提交于
commit 42d8644bd77dd2d747e004e367cb0c895a606f39 upstream. The "call" variable comes from the user in privcmd_ioctl_hypercall(). It's an offset into the hypercall_page[] which has (PAGE_SIZE / 32) elements. We need to put an upper bound on it to prevent an out of bounds access. Cc: stable@vger.kernel.org Fixes: 1246ae0b ("xen: add variable hypercall caller") Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Reviewed-by: NBoris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: NJuergen Gross <jgross@suse.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Will Deacon 提交于
commit 1e6f5440a6814d28c32d347f338bfef68bc3e69d upstream. Calling dump_backtrace() with a pt_regs argument corresponding to userspace doesn't make any sense and our unwinder will simply print "Call trace:" before unwinding the stack looking for user frames. Rather than go through this song and dance, just return early if we're passed a user register state. Cc: <stable@vger.kernel.org> Fixes: 1149aad1 ("arm64: Add dump_backtrace() in show_regs") Reported-by: NKefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Peter Geis 提交于
commit 6fd8b9780ec1a49ac46e0aaf8775247205e66231 upstream. Several rk3328 based boards experience high rgmii tx error rates. This is due to several pins in the rk3328.dtsi rgmii pinmux that are missing a defined pull strength setting. This causes the pinmux driver to default to 2ma (bit mask 00). These pins are only defined in the rk3328.dtsi, and are not listed in the rk3328 specification. The TRM only lists them as "Reserved" (RK3328 TRM V1.1, 3.3.3 Detail Register Description, GRF_GPIO0B_IOMUX, GRF_GPIO0C_IOMUX, GRF_GPIO0D_IOMUX). However, removal of these pins from the rgmii pinmux definition causes the interface to fail to transmit. Also, the rgmii tx and rx pins defined in the dtsi are not consistent with the rk3328 specification, with tx pins currently set to 12ma and rx pins set to 2ma. Fix this by setting tx pins to 8ma and the rx pins to 4ma, consistent with the specification. Defining the drive strength for the undefined pins eliminated the high tx packet error rate observed under heavy data transfers. Aligning the drive strength to the TRM values eliminated the occasional packet retry errors under iperf3 testing. This allows much higher data rates with no recorded tx errors. Tested on the rk3328-roc-cc board. Fixes: 52e02d37 ("arm64: dts: rockchip: add core dtsi file for RK3328 SoCs") Cc: stable@vger.kernel.org Signed-off-by: NPeter Geis <pgwipeout@gmail.com> Signed-off-by: NHeiko Stuebner <heiko@sntech.de> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Will Deacon 提交于
commit 045afc24124d80c6998d9c770844c67912083506 upstream. Rather embarrassingly, our futex() FUTEX_WAKE_OP implementation doesn't explicitly set the return value on the non-faulting path and instead leaves it holding the result of the underlying atomic operation. This means that any FUTEX_WAKE_OP atomic operation which computes a non-zero value will be reported as having failed. Regrettably, I wrote the buggy code back in 2011 and it was upstreamed as part of the initial arm64 support in 2012. The reasons we appear to get away with this are: 1. FUTEX_WAKE_OP is rarely used and therefore doesn't appear to get exercised by futex() test applications 2. If the result of the atomic operation is zero, the system call behaves correctly 3. Prior to version 2.25, the only operation used by GLIBC set the futex to zero, and therefore worked as expected. From 2.25 onwards, FUTEX_WAKE_OP is not used by GLIBC at all. Fix the implementation by ensuring that the return value is either 0 to indicate that the atomic operation completed successfully, or -EFAULT if we encountered a fault when accessing the user mapping. Cc: <stable@kernel.org> Fixes: 6170a974 ("arm64: Atomic operations") Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 David Engraf 提交于
commit e7dfb6d04e4715be1f3eb2c60d97b753fd2e4516 upstream. The function argument for the ISC_D0 on PC9 was incorrect. According to the documentation it should be 'C' aka 3. Signed-off-by: NDavid Engraf <david.engraf@sysgo.com> Reviewed-by: NNicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: NLudovic Desroches <ludovic.desroches@microchip.com> Fixes: 7f16cb67 ("ARM: at91/dt: add sama5d2 pinmux") Cc: <stable@vger.kernel.org> # v4.4+ Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Peter Ujfalusi 提交于
commit 4f96dc0a3e79ec257a2b082dab3ee694ff88c317 upstream. Correctly map the regulators used by tlv320aic3106. Both 1.8V and 3.3V for the codec is derived from VBAT via fixed regulators. Cc: <Stable@vger.kernel.org> # v4.14+ Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Peter Ujfalusi 提交于
commit 6691370646e844be98bb6558c024269791d20bd7 upstream. Correctly map the regulators used by tlv320aic3106. Both 1.8V and 3.3V for the codec is derived from VBAT via fixed regulators. Cc: <Stable@vger.kernel.org> # v4.14+ Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Jonas Karlman 提交于
commit 6b2fde3dbfab6ebc45b0cd605e17ca5057ff9a3b upstream. The following error can be seen during boot: of: /cpus/cpu@501: Couldn't find opp node Change cpu nodes to use operating-points-v2 in order to fix this. Fixes: ce76de98 ("ARM: dts: rockchip: convert rk3288 to operating-points-v2") Cc: stable@vger.kernel.org Signed-off-by: NJonas Karlman <jonas@kwiboo.se> Signed-off-by: NHeiko Stuebner <heiko@sntech.de> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Cornelia Huck 提交于
commit cf94db21905333e610e479688add629397a4b384 upstream. vring_create_virtqueue() allows the caller to specify via the may_reduce_num parameter whether the vring code is allowed to allocate a smaller ring than specified. However, the split ring allocation code tries to allocate a smaller ring on allocation failure regardless of what the caller specified. This may cause trouble for e.g. virtio-pci in legacy mode, which does not support ring resizing. (The packed ring code does not resize in any case.) Let's fix this by bailing out immediately in the split ring code if the requested size cannot be allocated and may_reduce_num has not been specified. While at it, fix a typo in the usage instructions. Fixes: 2a2d1382 ("virtio: Add improved queue allocation API") Cc: stable@vger.kernel.org # v4.6+ Signed-off-by: NCornelia Huck <cohuck@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reviewed-by: NHalil Pasic <pasic@linux.ibm.com> Reviewed-by: NJens Freimann <jfreimann@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Kefeng Wang 提交于
commit e8458e7afa855317b14915d7b86ab3caceea7eb6 upstream. When CONFIG_SPARSE_IRQ is disable, the request_mutex in struct irq_desc is not initialized which causes malfunction. Fixes: 9114014c ("genirq: Add mutex to irq desc to serialize request/free_irq()") Signed-off-by: NKefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Reviewed-by: NMukesh Ojha <mojha@codeaurora.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20190404074512.145533-1-wangkefeng.wang@huawei.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Stephen Boyd 提交于
commit 325aa19598e410672175ed50982f902d4e3f31c5 upstream. If a child irqchip calls irq_chip_set_wake_parent() but its parent irqchip has the IRQCHIP_SKIP_SET_WAKE flag set an error is returned. This is inconsistent behaviour vs. set_irq_wake_real() which returns 0 when the irqchip has the IRQCHIP_SKIP_SET_WAKE flag set. It doesn't attempt to walk the chain of parents and set irq wake on any chips that don't have the flag set either. If the intent is to call the .irq_set_wake() callback of the parent irqchip, then we expect irqchip implementations to omit the IRQCHIP_SKIP_SET_WAKE flag and implement an .irq_set_wake() function that calls irq_chip_set_wake_parent(). The problem has been observed on a Qualcomm sdm845 device where set wake fails on any GPIO interrupts after applying work in progress wakeup irq patches to the GPIO driver. The chain of chips looks like this: QCOM GPIO -> QCOM PDC (SKIP) -> ARM GIC (SKIP) The GPIO controllers parent is the QCOM PDC irqchip which in turn has ARM GIC as parent. The QCOM PDC irqchip has the IRQCHIP_SKIP_SET_WAKE flag set, and so does the grandparent ARM GIC. The GPIO driver doesn't know if the parent needs to set wake or not, so it unconditionally calls irq_chip_set_wake_parent() causing this function to return a failure because the parent irqchip (PDC) doesn't have the .irq_set_wake() callback set. Returning 0 instead makes everything work and irqs from the GPIO controller can be configured for wakeup. Make it consistent by returning 0 (success) from irq_chip_set_wake_parent() when a parent chip has IRQCHIP_SKIP_SET_WAKE set. [ tglx: Massaged changelog ] Fixes: 08b55e2a ("genirq: Add irqchip_set_wake_parent") Signed-off-by: NStephen Boyd <swboyd@chromium.org> Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Acked-by: NMarc Zyngier <marc.zyngier@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-gpio@vger.kernel.org Cc: Lina Iyer <ilina@codeaurora.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20190325181026.247796-1-swboyd@chromium.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Jason Yan 提交于
commit a89afe58f1a74aac768a5eb77af95ef4ee15beaa upstream. If the last bio returned is not dio->bio, the status of the bio will not assigned to dio->bio if it is error. This will cause the whole IO status wrong. ksoftirqd/21-117 [021] ..s. 4017.966090: 8,0 C N 4883648 [0] <idle>-0 [018] ..s. 4017.970888: 8,0 C WS 4924800 + 1024 [0] <idle>-0 [018] ..s. 4017.970909: 8,0 D WS 4935424 + 1024 [<idle>] <idle>-0 [018] ..s. 4017.970924: 8,0 D WS 4936448 + 321 [<idle>] ksoftirqd/21-117 [021] ..s. 4017.995033: 8,0 C R 4883648 + 336 [65475] ksoftirqd/21-117 [021] d.s. 4018.001988: myprobe1: (blkdev_bio_end_io+0x0/0x168) bi_status=7 ksoftirqd/21-117 [021] d.s. 4018.001992: myprobe: (aio_complete_rw+0x0/0x148) x0=0xffff802f2595ad80 res=0x12a000 res2=0x0 We always have to assign bio->bi_status to dio->bio.bi_status because we will only check dio->bio.bi_status when we return the whole IO to the upper layer. Fixes: 542ff7bf ("block: new direct I/O implementation") Cc: stable@vger.kernel.org Cc: Christoph Hellwig <hch@lst.de> Cc: Jens Axboe <axboe@kernel.dk> Reviewed-by: NMing Lei <ming.lei@redhat.com> Signed-off-by: NJason Yan <yanaijie@huawei.com> Signed-off-by: NJens Axboe <axboe@kernel.dk> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Jérôme Glisse 提交于
commit a3761c3c91209b58b6f33bf69dd8bb8ec0c9d925 upstream. When bio_add_pc_page() fails in bio_copy_user_iov() we should free the page we just allocated otherwise we are leaking it. Cc: linux-block@vger.kernel.org Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: stable@vger.kernel.org Reviewed-by: NChaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: NJérôme Glisse <jglisse@redhat.com> Signed-off-by: NJens Axboe <axboe@kernel.dk> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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