John Starks 3ac29732a2 mm/gup: fix gup_pud_range() for dax ... commit fcd0ccd836 upstream. For dax pud, pud_huge() returns true on x86. So the function works as long as hugetlb is configured. However, dax doesn't depend on hugetlb. Commit 414fd080d1 ("mm/gup: fix gup_pmd_range() for dax") fixed devmap-backed huge PMDs, but missed devmap-backed huge PUDs. Fix this as well. This fixes the below kernel panic: general protection fault, probably for non-canonical address 0x69e7c000cc478: 0000 [#1] SMP < snip > Call Trace: <TASK> get_user_pages_fast+0x1f/0x40 iov_iter_get_pages+0xc6/0x3b0 ? mempool_alloc+0x5d/0x170 bio_iov_iter_get_pages+0x82/0x4e0 ? bvec_alloc+0x91/0xc0 ? bio_alloc_bioset+0x19a/0x2a0 blkdev_direct_IO+0x282/0x480 ? __io_complete_rw_common+0xc0/0xc0 ? filemap_range_has_page+0x82/0xc0 generic_file_direct_write+0x9d/0x1a0 ? inode_update_time+0x24/0x30 __generic_file_write_iter+0xbd/0x1e0 blkdev_write_iter+0xb4/0x150 ? io_import_iovec+0x8d/0x340 io_write+0xf9/0x300 io_issue_sqe+0x3c3/0x1d30 ? sysvec_reschedule_ipi+0x6c/0x80 __io_queue_sqe+0x33/0x240 ? fget+0x76/0xa0 io_submit_sqes+0xe6a/0x18d0 ? __fget_light+0xd1/0x100 __x64_sys_io_uring_enter+0x199/0x880 ? __context_tracking_enter+0x1f/0x70 ? irqentry_exit_to_user_mode+0x24/0x30 ? irqentry_exit+0x1d/0x30 ? __context_tracking_exit+0xe/0x70 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fc97c11a7be < snip > </TASK> ---[ end trace 48b2e0e67debcaeb ]--- RIP: 0010:internal_get_user_pages_fast+0x340/0x990 < snip > Kernel panic - not syncing: Fatal exception Kernel Offset: disabled Link: https://lkml.kernel.org/r/1670392853-28252-1-git-send-email-ssengar@linux.microsoft.com Fixes: 414fd080d1 ("mm/gup: fix gup_pmd_range() for dax") Signed-off-by: John Starks <jostarks@microsoft.com> Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com> Cc: Jan Kara <jack@suse.cz> Cc: Yu Zhao <yuzhao@google.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: David Hildenbrand <david@redhat.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Alistair Popple <apopple@nvidia.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-12-14 11:37:20 +01:00
..
damon	mm/damon/dbgfs: check if rm_contexts input is for a real context	2022-11-16 09:58:27 +01:00
kasan	…
kfence	…
Kconfig	…
Kconfig.debug	…
Makefile	…
backing-dev.c	writeback: avoid use-after-free after removing device	2022-08-31 17:16:47 +02:00
balloon_compaction.c	…
bootmem_info.c	bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem	2022-08-31 17:16:48 +02:00
cleancache.c	…
cma.c	…
cma.h	…
cma_debug.c	…
cma_sysfs.c	…
compaction.c	mm: migrate: fix THP's mapcount on isolation	2022-12-08 11:28:44 +01:00
debug.c	…
debug_page_ref.c	…
debug_vm_pgtable.c	…
dmapool.c	…
early_ioremap.c	…
fadvise.c	…
failslab.c	…
filemap.c	mm: fs: initialize fsdata passed to write_begin/write_end interface	2022-11-26 09:24:51 +01:00
frontswap.c	…
gup.c	mm/gup: fix gup_pud_range() for dax	2022-12-14 11:37:20 +01:00
gup_test.c	…
gup_test.h	…
highmem.c	…
hmm.c	…
huge_memory.c	mm/huge_memory: use pfn_to_online_page() in split_huge_pages_all()	2022-10-12 09:53:28 +02:00
hugetlb.c	hugetlbfs: don't delete error page from pagecache	2022-11-26 09:24:33 +01:00
hugetlb_cgroup.c	…
hugetlb_vmemmap.c	…
hugetlb_vmemmap.h	…
hwpoison-inject.c	…
init-mm.c	…
internal.h	…
interval_tree.c	…
io-mapping.c	…
ioremap.c	…
khugepaged.c	mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths	2022-12-14 11:37:18 +01:00
kmemleak.c	Revert "mm: kmemleak: take a full lowmem check in kmemleak_*_phys()"	2022-09-15 11:30:00 +02:00
ksm.c	…
list_lru.c	…
maccess.c	maccess: Fix writing offset in case of fault in strncpy_from_kernel_nofault()	2022-11-26 09:24:47 +01:00
madvise.c	mm: fix madivse_pageout mishandling on non-LRU page	2022-10-05 10:39:39 +02:00
mapping_dirty_helpers.c	…
memblock.c	…
memcontrol.c	memcg: fix possible use-after-free in memcg_write_event_control()	2022-12-14 11:37:19 +01:00
memfd.c	…
memory-failure.c	hugetlbfs: don't delete error page from pagecache	2022-11-26 09:24:33 +01:00
memory.c	…
memory_hotplug.c	…
mempolicy.c	mm/mempolicy: fix get_nodes out of bound access	2022-08-17 14:23:47 +02:00
mempool.c	…
memremap.c	mm/memremap.c: map FS_DAX device memory as decrypted	2022-11-16 09:58:27 +01:00
memtest.c	…
migrate.c	mm/migrate_device.c: flush TLB while holding PTL	2022-10-05 10:39:39 +02:00
mincore.c	…
mlock.c	…
mm_init.c	…
mmap.c	mm/mmap: undo ->mmap() when arch_validate_flags() fails	2022-10-26 12:34:24 +02:00
mmap_lock.c	…
mmu_gather.c	mm/khugepaged: fix GUP-fast interaction by sending IPI	2022-12-14 11:37:17 +01:00
mmu_notifier.c	…
mmzone.c	…
mprotect.c	…
mremap.c	…
msync.c	…
nommu.c	…
oom_kill.c	…
page-writeback.c	writeback: avoid use-after-free after removing device	2022-08-31 17:16:47 +02:00
page_alloc.c	mm: prevent page_frag_alloc() from corrupting the memory	2022-10-05 10:39:39 +02:00
page_counter.c	…
page_ext.c	…
page_idle.c	…
page_io.c	…
page_isolation.c	…
page_owner.c	…
page_poison.c	…
page_reporting.c	…
page_reporting.h	…
page_vma_mapped.c	…
pagewalk.c	mm: pagewalk: Fix race between unmap and page walker	2022-09-08 12:28:05 +02:00
percpu-internal.h	…
percpu-km.c	…
percpu-stats.c	…
percpu-vm.c	…
percpu.c	…
pgalloc-track.h	…
pgtable-generic.c	…
process_vm_access.c	…
ptdump.c	mm: pagewalk: Fix race between unmap and page walker	2022-09-08 12:28:05 +02:00
readahead.c	…
rmap.c	mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse	2022-09-05 10:30:07 +02:00
rodata_test.c	…
secretmem.c	mm: fix dereferencing possible ERR_PTR	2022-10-05 10:39:39 +02:00
shmem.c	mm: shmem: don't truncate page if memory failure happens	2022-11-26 09:24:28 +01:00
shuffle.c	…
shuffle.h	…
slab.c	…
slab.h	…
slab_common.c	…
slob.c	…
slub.c	mm: slub: fix flush_cpu_slab()/__free_slab() invocations in task context.	2022-09-28 11:11:44 +02:00
sparse-vmemmap.c	…
sparse.c	…
swap.c	…
swap_cgroup.c	…
swap_slots.c	…
swap_state.c	…
swapfile.c	…
truncate.c	…
usercopy.c	…
userfaultfd.c	mm: shmem: don't truncate page if memory failure happens	2022-11-26 09:24:28 +01:00
util.c	…
vmacache.c	…
vmalloc.c	…
vmpressure.c	…
vmscan.c	mm: __isolate_lru_page_prepare() in isolate_migratepages_block()	2022-12-08 11:28:44 +01:00
vmstat.c	…
workingset.c	…
z3fold.c	…
zbud.c	…
zpool.c	…
zsmalloc.c	…
zswap.c	…