- 12 Feb, 2021 1 commit
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Suravee Suthikulpanit authored
Certain AMD platforms enable power gating feature for IOMMU PMC, which prevents the IOMMU driver from updating the counter while trying to validate the PMC functionality in the init_iommu_perf_ctr(). This results in disabling PMC support and the following error message: "AMD-Vi: Unable to read/write to IOMMU perf counter" To workaround this issue, disable power gating temporarily by programming the counter source to non-zero value while validating the counter, and restore the prior state afterward. Signed-off-by:Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Tested-by:
Tj (Elloe Linux) <ml.linux@elloe.vision> Link: https://lore.kernel.org/r/20210208122712.5048-1-suravee.suthikulpanit@amd.com Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=201753Signed-off-by:
Joerg Roedel <jroedel@suse.de>
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- 28 Jan, 2021 12 commits
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Suravee Suthikulpanit authored
Switch to using IO page table framework for AMD IOMMU v1 page table. Signed-off-by:
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Suravee Suthikulpanit authored
These implement map and unmap for AMD IOMMU v1 pagetable, which will be used by the IO pagetable framework. Also clean up unused extern function declarations. Signed-off-by:
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Suravee Suthikulpanit authored
This implements iova_to_phys for AMD IOMMU v1 pagetable, which will be used by the IO page table framework. Signed-off-by:
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Suravee Suthikulpanit authored
To simplify the fetch_pte function. There is no functional change. Signed-off-by:
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Suravee Suthikulpanit authored
There is no functional change. Signed-off-by:
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Suravee Suthikulpanit authored
Since the IO page table root and mode parameters have been moved into the struct amd_io_pg, the function is no longer needed. Therefore, remove it along with the struct domain_pgtable. Signed-off-by:
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Suravee Suthikulpanit authored
By consolidate logic into v1_free_pgtable helper function, which is called from IO page table framework. Signed-off-by:
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Suravee Suthikulpanit authored
Preparing to migrate to use IO page table framework. There is no functional change. Signed-off-by:
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Suravee Suthikulpanit authored
And move declaration to header file so that they can be included across multiple files. There is no functional change. Signed-off-by:
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Suravee Suthikulpanit authored
Make use of the new struct amd_io_pgtable in preparation to remove the struct domain_pgtable. Signed-off-by:
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Suravee Suthikulpanit authored
To better organize the data structure since it contains IO page table related information. Signed-off-by:
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Suravee Suthikulpanit authored
Add initial hook up code to implement generic IO page table framework. Signed-off-by:
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- 27 Jan, 2021 4 commits
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Suravee Suthikulpanit authored
Move the function to header file to allow inclusion in other files. Signed-off-by:
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Tom Rix authored
See Documentation/core-api/printk-formats.rst. commit cbacb5ab ("docs: printk-formats: Stop encouraging use of unnecessary %h[xudi] and %hh[xudi]") Standard integer promotion is already done and %hx and %hhx is useless so do not encourage the use of %hh[xudi] or %h[xudi]. Signed-off-by:
Tom Rix <trix@redhat.com> Link: https://lore.kernel.org/r/20201215213021.2090698-1-trix@redhat.comSigned-off-by:
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Zheng Yongjun authored
Spinlock can be initialized automatically with DEFINE_SPINLOCK() rather than explicitly calling spin_lock_init(). Signed-off-by:
Zheng Yongjun <zhengyongjun3@huawei.com> Link: https://lore.kernel.org/r/20201228135112.28621-1-zhengyongjun3@huawei.comSigned-off-by:
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Adrian Huang authored
From: Adrian Huang <ahuang12@lenovo.com> The values of local variables are assigned after local variables are declared, so no need to assign the initial value during the variable declaration. And, no need to assign NULL for the local variable 'ivrs_base' after invoking acpi_put_table(). Signed-off-by:
Adrian Huang <ahuang12@lenovo.com> Acked-by:
Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20201210021330.2022-1-adrianhuang0701@gmail.comSigned-off-by:
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- 25 Jan, 2021 1 commit
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Linus Torvalds authored
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- 24 Jan, 2021 22 commits
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git://git.libc.org/linux-shLinus Torvalds authored
Pull arch/sh updates from Rich Felker: "Cleanup and warning fixes" * tag 'sh-for-5.11' of git://git.libc.org/linux-sh: sh/intc: Restore devm_ioremap() alignment sh: mach-sh03: remove duplicate include arch: sh: remove duplicate include sh: Drop ARCH_NR_GPIOS definition sh: Remove unused HAVE_COPY_THREAD_TLS macro sh: remove CONFIG_IDE from most defconfig sh: mm: Convert to DEFINE_SHOW_ATTRIBUTE sh: intc: Convert to DEFINE_SHOW_ATTRIBUTE arch/sh: hyphenate Non-Uniform in Kconfig prompt sh: dma: fix kconfig dependency for G2_DMA
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull io_uring fixes from Jens Axboe: "Still need a final cancelation fix that isn't quite done done, expected in the next day or two. That said, this contains: - Wakeup fix for IOPOLL requests - SQPOLL split close op handling fix - Ensure that any use of io_uring fd itself is marked as inflight - Short non-regular file read fix (Pavel) - Fix up bad false positive warning (Pavel) - SQPOLL fixes (Pavel) - In-flight removal fix (Pavel)" * tag 'io_uring-5.11-2021-01-24' of git://git.kernel.dk/linux-block: io_uring: account io_uring internal files as REQ_F_INFLIGHT io_uring: fix sleeping under spin in __io_clean_op io_uring: fix short read retries for non-reg files io_uring: fix SQPOLL IORING_OP_CLOSE cancelation state io_uring: fix skipping disabling sqo on exec io_uring: fix uring_flush in exit_files() warning io_uring: fix false positive sqo warning on flush io_uring: iopoll requests should also wake task ->in_idle state
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull block fixes from Jens Axboe: - NVMe pull request from Christoph: - fix a status code in nvmet (Chaitanya Kulkarni) - avoid double completions in nvme-rdma/nvme-tcp (Chao Leng) - fix the CMB support to cope with NVMe 1.4 controllers (Klaus Jensen) - fix PRINFO handling in the passthrough ioctl (Revanth Rajashekar) - fix a double DMA unmap in nvme-pci - lightnvm error path leak fix (Pan) - MD pull request from Song: - Flush request fix (Xiao) * tag 'block-5.11-2021-01-24' of git://git.kernel.dk/linux-block: lightnvm: fix memory leak when submit fails nvme-pci: fix error unwind in nvme_map_data nvme-pci: refactor nvme_unmap_data md: Set prev_flush_start and flush_bio in an atomic way nvmet: set right status on error in id-ns handler nvme-pci: allow use of cmb on v1.4 controllers nvme-tcp: avoid request double completion for concurrent nvme_tcp_timeout nvme-rdma: avoid request double completion for concurrent nvme_rdma_timeout nvme: check the PRINFO bit before deciding the host buffer length -
Linus Torvalds authored
Merge misc fixes from Andrew Morton: "18 patches. Subsystems affected by this patch series: mm (pagealloc, memcg, kasan, memory-failure, and highmem), ubsan, proc, and MAINTAINERS" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: MAINTAINERS: add a couple more files to the Clang/LLVM section proc_sysctl: fix oops caused by incorrect command parameters powerpc/mm/highmem: use __set_pte_at() for kmap_local() mips/mm/highmem: use set_pte() for kmap_local() mm/highmem: prepare for overriding set_pte_at() sparc/mm/highmem: flush cache and TLB mm: fix page reference leak in soft_offline_page() ubsan: disable unsigned-overflow check for i386 kasan, mm: fix resetting page_alloc tags for HW_TAGS kasan, mm: fix conflicts with init_on_alloc/free kasan: fix HW_TAGS boot parameters kasan: fix incorrect arguments passing in kasan_add_zero_shadow kasan: fix unaligned address is unhandled in kasan_remove_zero_shadow mm: fix numa stats for thp migration mm: memcg: fix memcg file_dirty numa stat mm: memcg/slab: optimize objcg stock draining mm: fix initialization of struct page for holes in memory layout x86/setup: don't remove E820_TYPE_RAM for pfn 0
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-miscLinus Torvalds authored
Pull char/misc driver fixes from Greg KH: "Here are some small char/misc driver fixes for 5.11-rc5: - habanalabs driver fixes - phy driver fixes - hwtracing driver fixes - rtsx cardreader driver fix All of these have been in linux-next with no reported issues" * tag 'char-misc-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: misc: rtsx: init value of aspm_enabled habanalabs: disable FW events on device removal habanalabs: fix backward compatibility of idle check habanalabs: zero pci counters packet before submit to FW intel_th: pci: Add Alder Lake-P support stm class: Fix module init return on allocation failure habanalabs: prevent soft lockup during unmap habanalabs: fix reset process in case of failures habanalabs: fix dma_addr passed to dma_mmap_coherent phy: mediatek: allow compile-testing the dsi phy phy: cpcap-usb: Fix warning for missing regulator_disable PHY: Ingenic: fix unconditional build of phy-ingenic-usb
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Linus Torvalds authored
Merge tag 'driver-core-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core fixes from Greg KH: "Here are some small driver core fixes for 5.11-rc5 that resolve some reported problems: - revert of a -rc1 patch that was causing problems with some machines - device link device name collision problem fix (busses only have to name devices unique to their bus, not unique to all busses) - kernfs splice bugfixes to resolve firmware loading problems for Qualcomm systems. - other tiny driver core fixes for minor issues reported. All of these have been in linux-next with no reported problems" * tag 'driver-core-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: driver core: Fix device link device name collision driver core: Extend device_is_dependent() kernfs: wire up ->splice_read and ->splice_write kernfs: implement ->write_iter kernfs: implement ->read_iter Revert "driver core: Reorder devices on successful probe" Driver core: platform: Add extra error check in devm_platform_get_irqs_affinity() drivers core: Free dma_range_map when driver probe failed
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/stagingLinus Torvalds authored
Pull staging/IIO driver fixes from Greg KH: "Here are some IIO driver fixes for 5.11-rc5 to resolve some reported problems. Nothing major, just a few small fixes, all of these have been in linux-next for a while and full details are in the shortlog" * tag 'staging-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: iio: sx9310: Fix semtech,avg-pos-strength setting when > 16 iio: common: st_sensors: fix possible infinite loop in st_sensors_irq_thread iio: ad5504: Fix setting power-down state counter:ti-eqep: remove floor drivers: iio: temperature: Add delay after the addressed reset command in mlx90632.c iio: adc: ti_am335x_adc: remove omitted iio_kfifo_free() dt-bindings: iio: accel: bma255: Fix bmc150/bmi055 compatible iio: sx9310: Off by one in sx9310_read_thresh()
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/ttyLinus Torvalds authored
Pull tty/serial fixes from Greg KH: "Here are three small tty/serial fixes for 5.11-rc5 to resolve reported problems: - two patches to fix up writing to ttys with splice - mvebu-uart driver fix for reported problem All of these have been in linux-next with no reported problems" * tag 'tty-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: tty: fix up hung_up_tty_write() conversion tty: implement write_iter serial: mvebu-uart: fix tx lost characters at power off
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usbLinus Torvalds authored
Pull USB fixes from Greg KH: "Here are some small USB driver fixes for 5.11-rc5. They resolve: - xhci issues for some reported problems - ehci driver issue for one specific device - USB gadget fixes for some reported problems - cdns3 driver fixes for issues reported - MAINTAINERS file update - thunderbolt minor fix All of these have been in linux-next with no reported issues" * tag 'usb-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: usb: bdc: Make bdc pci driver depend on BROKEN xhci: tegra: Delay for disabling LFPS detector xhci: make sure TRB is fully written before giving it to the controller usb: udc: core: Use lock when write to soft_connect USB: gadget: dummy-hcd: Fix errors in port-reset handling usb: gadget: aspeed: fix stop dma register setting. USB: ehci: fix an interrupt calltrace error ehci: fix EHCI host controller initialization sequence MAINTAINERS: update Peter Chen's email address thunderbolt: Drop duplicated 0x prefix from format string MAINTAINERS: Update address for Cadence USB3 driver usb: cdns3: imx: improve driver .remove API usb: cdns3: imx: fix can't create core device the second time issue usb: cdns3: imx: fix writing read-only memory issue
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Nathan Chancellor authored
The K: entry should ensure that Nick and I always get CC'd on patches that touch these files but it is better to be explicit rather than implicit. Link: https://lkml.kernel.org/r/20210114004059.2129921-1-natechancellor@gmail.comSigned-off-by:
Nathan Chancellor <natechancellor@gmail.com> Reviewed-by:
Nick Desaulniers <ndesaulniers@google.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Xiaoming Ni authored
The process_sysctl_arg() does not check whether val is empty before invoking strlen(val). If the command line parameter () is incorrectly configured and val is empty, oops is triggered. For example: "hung_task_panic=1" is incorrectly written as "hung_task_panic", oops is triggered. The call stack is as follows: Kernel command line: .... hung_task_panic ...... Call trace: __pi_strlen+0x10/0x98 parse_args+0x278/0x344 do_sysctl_args+0x8c/0xfc kernel_init+0x5c/0xf4 ret_from_fork+0x10/0x30 To fix it, check whether "val" is empty when "phram" is a sysctl field. Error codes are returned in the failure branch, and error logs are generated by parse_args(). Link: https://lkml.kernel.org/r/20210118133029.28580-1-nixiaoming@huawei.com Fixes: 3db978d4 ("kernel/sysctl: support setting sysctl parameters from kernel command line") Signed-off-by:Xiaoming Ni <nixiaoming@huawei.com> Acked-by:
Vlastimil Babka <vbabka@suse.cz> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Iurii Zaikin <yzaikin@google.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Heiner Kallweit <hkallweit1@gmail.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: <stable@vger.kernel.org> [5.8+] Signed-off-by:
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Thomas Gleixner authored
The original PowerPC highmem mapping function used __set_pte_at() to denote that the mapping is per CPU. This got lost with the conversion to the generic implementation. Override the default map function. Link: https://lkml.kernel.org/r/20210112170411.281464308@linutronix.de Fixes: 47da42b2 ("powerpc/mm/highmem: Switch to generic kmap atomic") Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Andreas Larsson <andreas@gaisler.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Paul Cercueil <paul@crapouillou.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by:
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Thomas Gleixner authored
set_pte_at() on MIPS invokes update_cache() which might recurse into kmap_local(). Use set_pte() like the original MIPS highmem implementation did. Link: https://lkml.kernel.org/r/20210112170411.187513575@linutronix.de Fixes: a4c33e83 ("mips/mm/highmem: Switch to generic kmap atomic") Signed-off-by:
Paul Cercueil <paul@crapouillou.net> Reported-by:
Thomas Bogendoerfer <tsbogend@alpha.franken.de> Acked-by:
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Thomas Gleixner authored
The generic kmap_local() map function uses set_pte_at(), but MIPS requires set_pte() and PowerPC wants __set_pte_at(). Provide arch_kmap_local_set_pte() and default it to set_pte_at(). Link: https://lkml.kernel.org/r/20210112170411.056306194@linutronix.deSigned-off-by:
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Thomas Gleixner authored
Patch series "mm/highmem: Fix fallout from generic kmap_local conversions". The kmap_local conversion wreckaged sparc, mips and powerpc as it missed some of the details in the original implementation. This patch (of 4): The recent conversion to the generic kmap_local infrastructure failed to assign the proper pre/post map/unmap flush operations for sparc. Sparc requires cache flush before map/unmap and tlb flush afterwards. Link: https://lkml.kernel.org/r/20210112170136.078559026@linutronix.de Link: https://lkml.kernel.org/r/20210112170410.905976187@linutronix.de Fixes: 3293efa9 ("sparc/mm/highmem: Switch to generic kmap atomic") Signed-off-by:
Andreas Larsson <andreas@gaisler.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Cercueil <paul@crapouillou.net> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Dan Williams authored
The conversion to move pfn_to_online_page() internal to soft_offline_page() missed that the get_user_pages() reference taken by the madvise() path needs to be dropped when pfn_to_online_page() fails. Note the direct sysfs-path to soft_offline_page() does not perform a get_user_pages() lookup. When soft_offline_page() is handed a pfn_valid() && !pfn_to_online_page() pfn the kernel hangs at dax-device shutdown due to a leaked reference. Link: https://lkml.kernel.org/r/161058501210.1840162.8108917599181157327.stgit@dwillia2-desk3.amr.corp.intel.com Fixes: feec24a6 ("mm, soft-offline: convert parameter to pfn") Signed-off-by:
Dan Williams <dan.j.williams@intel.com> Reviewed-by:
David Hildenbrand <david@redhat.com> Reviewed-by:
Oscar Salvador <osalvador@suse.de> Reviewed-by:
Naoya Horiguchi <naoya.horiguchi@nec.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Qian Cai <cai@lca.pw> Cc: <stable@vger.kernel.org> Signed-off-by:
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Arnd Bergmann authored
Building ubsan kernels even for compile-testing introduced these warnings in my randconfig environment: crypto/blake2b_generic.c:98:13: error: stack frame size of 9636 bytes in function 'blake2b_compress' [-Werror,-Wframe-larger-than=] static void blake2b_compress(struct blake2b_state *S, crypto/sha512_generic.c:151:13: error: stack frame size of 1292 bytes in function 'sha512_generic_block_fn' [-Werror,-Wframe-larger-than=] static void sha512_generic_block_fn(struct sha512_state *sst, u8 const *src, lib/crypto/curve25519-fiat32.c:312:22: error: stack frame size of 2180 bytes in function 'fe_mul_impl' [-Werror,-Wframe-larger-than=] static noinline void fe_mul_impl(u32 out[10], const u32 in1[10], const u32 in2[10]) lib/crypto/curve25519-fiat32.c:444:22: error: stack frame size of 1588 bytes in function 'fe_sqr_impl' [-Werror,-Wframe-larger-than=] static noinline void fe_sqr_impl(u32 out[10], const u32 in1[10]) Further testing showed that this is caused by -fsanitize=unsigned-integer-overflow, but is isolated to the 32-bit x86 architecture. The one in blake2b immediately overflows the 8KB stack area architectures, so better ensure this never happens by disabling the option for 32-bit x86. Link: https://lkml.kernel.org/r/20210112202922.2454435-1-arnd@kernel.org Link: https://lore.kernel.org/lkml/20201230154749.746641-1-arnd@kernel.org/ Fixes: d0a3ac54 ("ubsan: enable for all*config builds") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Acked-by:
Kees Cook <keescook@chromium.org> Reviewed-by:
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Andrey Konovalov authored
A previous commit added resetting KASAN page tags to kernel_init_free_pages() to avoid false-positives due to accesses to metadata with the hardware tag-based mode. That commit did reset page tags before the metadata access, but didn't restore them after. As the result, KASAN fails to detect bad accesses to page_alloc allocations on some configurations. Fix this by recovering the tag after the metadata access. Link: https://lkml.kernel.org/r/02b5bcd692e912c27d484030f666b350ad7e4ae4.1611074450.git.andreyknvl@google.com Fixes: aa1ef4d7 ("kasan, mm: reset tags when accessing metadata") Signed-off-by:
Andrey Konovalov <andreyknvl@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Marco Elver <elver@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Peter Collingbourne <pcc@google.com> Cc: Evgenii Stepanov <eugenis@google.com> Cc: Branislav Rankov <Branislav.Rankov@arm.com> Cc: Kevin Brodsky <kevin.brodsky@arm.com> Signed-off-by:
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Andrey Konovalov authored
A few places where SLUB accesses object's data or metadata were missed in a previous patch. This leads to false positives with hardware tag-based KASAN when bulk allocations are used with init_on_alloc/free. Fix the false-positives by resetting pointer tags during these accesses. (The kasan_reset_tag call is removed from slab_alloc_node, as it's added into maybe_wipe_obj_freeptr.) Link: https://linux-review.googlesource.com/id/I50dd32838a666e173fe06c3c5c766f2c36aae901 Link: https://lkml.kernel.org/r/093428b5d2ca8b507f4a79f92f9929b35f7fada7.1610731872.git.andreyknvl@google.com Fixes: aa1ef4d7 ("kasan, mm: reset tags when accessing metadata") Signed-off-by:
Dmitry Vyukov <dvyukov@google.com> Acked-by:
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Andrey Konovalov authored
The initially proposed KASAN command line parameters are redundant. This change drops the complex "kasan.mode=off/prod/full" parameter and adds a simpler kill switch "kasan=off/on" instead. The new parameter together with the already existing ones provides a cleaner way to express the same set of features. The full set of parameters with this change: kasan=off/on - whether KASAN is enabled kasan.fault=report/panic - whether to only print a report or also panic kasan.stacktrace=off/on - whether to collect alloc/free stack traces Default values: kasan=on kasan.fault=report kasan.stacktrace=on (if CONFIG_DEBUG_KERNEL=y) kasan.stacktrace=off (otherwise) Link: https://linux-review.googlesource.com/id/Ib3694ed90b1e8ccac6cf77dfd301847af4aba7b8 Link: https://lkml.kernel.org/r/4e9c4a4bdcadc168317deb2419144582a9be6e61.1610736745.git.andreyknvl@google.comSigned-off-by:
Vincenzo Frascino <vincenzo.frascino@arm.com> Reviewed-by:
Marco Elver <elver@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Peter Collingbourne <pcc@google.com> Cc: Evgenii Stepanov <eugenis@google.com> Cc: Branislav Rankov <Branislav.Rankov@arm.com> Cc: Kevin Brodsky <kevin.brodsky@arm.com> Signed-off-by:
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Lecopzer Chen authored
kasan_remove_zero_shadow() shall use original virtual address, start and size, instead of shadow address. Link: https://lkml.kernel.org/r/20210103063847.5963-1-lecopzer@gmail.com Fixes: 0207df4f ("kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN") Signed-off-by:
Lecopzer Chen <lecopzer.chen@mediatek.com> Reviewed-by:
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Lecopzer Chen authored
During testing kasan_populate_early_shadow and kasan_remove_zero_shadow, if the shadow start and end address in kasan_remove_zero_shadow() is not aligned to PMD_SIZE, the remain unaligned PTE won't be removed. In the test case for kasan_remove_zero_shadow(): shadow_start: 0xffffffb802000000, shadow end: 0xffffffbfbe000000 3-level page table: PUD_SIZE: 0x40000000 PMD_SIZE: 0x200000 PAGE_SIZE: 4K 0xffffffbf80000000 ~ 0xffffffbfbdf80000 will not be removed because in kasan_remove_pud_table(), kasan_pmd_table(*pud) is true but the next address is 0xffffffbfbdf80000 which is not aligned to PUD_SIZE. In the correct condition, this should fallback to the next level kasan_remove_pmd_table() but the condition flow always continue to skip the unaligned part. Fix by correcting the condition when next and addr are neither aligned. Link: https://lkml.kernel.org/r/20210103135621.83129-1-lecopzer@gmail.com Fixes: 0207df4f ("kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN") Signed-off-by:
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