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Al Viro 4228c037f8 fix short copy handling in copy_mc_pipe_to_iter() 
commit c3497fd009ef2c59eea60d21c3ac22de3585ed7d upstream.

Unlike other copying operations on ITER_PIPE, copy_mc_to_iter() can
result in a short copy.  In that case we need to trim the unused
buffers, as well as the length of partially filled one - it's not
enough to set ->head, ->iov_offset and ->count to reflect how
much had we copied.  Not hard to fix, fortunately...

I'd put a helper (pipe_discard_from(pipe, head)) into pipe_fs_i.h,
rather than iov_iter.c - it has nothing to do with iov_iter and
having it will allow us to avoid an ugly kludge in fs/splice.c.
We could put it into lib/iov_iter.c for now and move it later,
but I don't see the point going that way...

Cc: stable@kernel.org # 4.19+
Fixes: ca146f6f09 "lib/iov_iter: Fix pipe handling in _copy_to_iter_mcsafe()"
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-08-17 14:22:51 +02:00
..
842
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crypto
crypto: memneq - move into lib/
2022-06-22 14:22:03 +02:00
dim
dim: initialize all struct fields
2022-05-18 10:26:49 +02:00
fonts
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
kunit
kunit: fix debugfs code to use enum kunit_status, not bool
2022-06-09 10:22:53 +02:00
livepatch
…
lz4
lz4: fix LZ4_decompress_safe_partial read out of bound
2022-04-13 20:59:21 +02:00
lzo
…
math
math: make RATIONAL tristate
2021-09-08 11:50:26 -07:00
mpi
lib/mpi: Add the return value check of kcalloc()
2022-01-27 11:03:58 +01:00
pldmfw
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
raid6
lib/raid6/test/Makefile: Use $(pound) instead of \# for Make 4.3
2022-04-08 14:23:56 +02:00
reed_solomon
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
vdso
lib/vdso: Add vdso_data pointer as input to __arch_get_timens_vdso_data()
2021-04-14 23:04:44 +10:00
xz
lib/xz: Validate the value before assigning it to an enum variable
2021-11-18 19:16:17 +01:00
zlib_deflate
…
zlib_dfltcc
…
zlib_inflate
lib/zlib_inflate/inffast: check config in C to avoid unused function warning
2021-09-24 16:13:35 -07:00
zstd
lib/decompressors: fix spelling mistakes
2021-07-01 11:06:05 -07:00
.gitignore
.gitignore: prefix local generated files with a slash
2021-05-02 00:43:35 +09:00
argv_split.c
…
ashldi3.c
…
ashrdi3.c
…
asn1_decoder.c
…
asn1_encoder.c
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
assoc_array.c
assoc_array: Fix BUG_ON during garbage collect
2022-06-06 08:43:37 +02:00
atomic64_test.c
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atomic64.c
locking/atomic: atomic64: support ARCH_ATOMIC
2021-05-26 13:20:50 +02:00
audit.c
…
bcd.c
…
bch.c
lib/bch.c: fix a typo in the file bch.c
2021-05-06 19:24:12 -07:00
bitfield_kunit.c
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bitmap.c
bitmap: extend comment to bitmap_print_bitmask/list_to_buf
2021-08-13 10:27:50 +02:00
bitrev.c
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bootconfig.c
memblock: introduce saner 'memblock_free_ptr()' interface
2021-09-14 13:23:22 -07:00
bsearch.c
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btree.c
…
bucket_locks.c
…
bug.c
bug: Assign values once in bug_get_file_line()
2021-04-01 09:54:37 +01:00
build_OID_registry
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buildid.c
kdump: use vmlinux_build_id to simplify
2021-07-08 11:48:22 -07:00
bust_spinlocks.c
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check_signature.c
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checksum.c
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clz_ctz.c
…
clz_tab.c
…
cmdline_kunit.c
lib/cmdline_kunit: Remove a cast which are no-longer required
2021-06-23 16:41:41 -06:00
cmdline.c
lib/cmdline: Export next_arg() for being used in modules
2021-05-05 16:07:40 +02:00
cmpdi2.c
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compat_audit.c
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cpu_rmap.c
…
cpumask.c
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crc4.c
…
crc7.c
…
crc8.c
lib: crc8: pointer to data block should be const
2021-05-06 19:24:12 -07:00
crc16.c
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crc32.c
…
crc32defs.h
…
crc32test.c
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crc64.c
lib: crc64: fix kernel-doc warning
2021-06-05 08:58:12 -07:00
crc-ccitt.c
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crc-itu-t.c
…
crc-t10dif.c
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ctype.c
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debug_info.c
isystem: ship and use stdarg.h
2021-08-19 09:02:55 +09:00
debug_locks.c
locking/lockdep: Improve noinstr vs errors
2021-06-22 13:56:43 +02:00
debugobjects.c
debugobjects: Make them PREEMPT_RT aware
2021-08-13 10:07:44 +02:00
dec_and_lock.c
…
decompress_bunzip2.c
lib/decompressors: fix spelling mistakes
2021-07-01 11:06:05 -07:00
decompress_inflate.c
…
decompress_unlz4.c
lib/decompress_unlz4.c: correctly handle zero-padding around initrds.
2021-07-01 11:06:06 -07:00
decompress_unlzma.c
lib: fix inconsistent indenting in process_bit1()
2021-05-06 19:24:12 -07:00
decompress_unlzo.c
lib/decompressors: remove set but not used variabled 'level'
2021-07-01 11:06:06 -07:00
decompress_unxz.c
lib/xz: Avoid overlapping memcpy() with invalid input with in-place decompression
2021-11-18 19:16:17 +01:00
decompress_unzstd.c
lib/decompressors: fix spelling mistakes
2021-07-01 11:06:05 -07:00
decompress.c
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devmem_is_allowed.c
lib: use PFN_PHYS() in devmem_is_allowed()
2021-08-13 14:09:32 -10:00
devres.c
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
digsig.c
…
dump_stack.c
lib/dump_stack: correct kernel-doc notation
2021-09-08 11:50:26 -07:00
dynamic_debug.c
dyndbg: make dyndbg a known cli param
2021-11-18 19:16:52 +01:00
dynamic_queue_limits.c
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earlycpio.c
lib: remove "expecting prototype" kernel-doc warnings
2021-04-16 16:10:37 -07:00
errname.c
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error-inject.c
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errseq.c
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extable.c
…
fault-inject-usercopy.c
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fault-inject.c
…
fdt_addresses.c
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fdt_empty_tree.c
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fdt_ro.c
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fdt_rw.c
…
fdt_strerror.c
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fdt_sw.c
…
fdt_wip.c
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fdt.c
…
find_bit_benchmark.c
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find_bit.c
lib: add fast path for find_first_*_bit() and find_last_bit()
2021-05-06 19:24:12 -07:00
flex_proportions.c
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gen_crc32table.c
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gen_crc64table.c
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genalloc.c
lib/genalloc: add parameter description to fix doc compile warning
2021-05-06 19:24:12 -07:00
generic-radix-tree.c
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glob.c
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globtest.c
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hexdump.c
hex2bin: fix access beyond string end
2022-05-09 09:14:30 +02:00
hweight.c
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idr.c
ida: don't use BUG_ON() for debugging
2022-07-12 16:35:18 +02:00
inflate.c
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interval_tree_test.c
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interval_tree.c
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iomap_copy.c
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iomap.c
…
iommu-helper.c
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iov_iter.c
fix short copy handling in copy_mc_pipe_to_iter()
2022-08-17 14:22:51 +02:00
irq_poll.c
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irq_regs.c
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is_single_threaded.c
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kasprintf.c
isystem: ship and use stdarg.h
2021-08-19 09:02:55 +09:00
Kconfig
crypto: memneq - move into lib/
2022-06-22 14:22:03 +02:00
Kconfig.debug
random: remove ratelimiting for in-kernel unseeded randomness
2022-05-30 09:29:16 +02:00
Kconfig.kasan
kasan: fix Kconfig check of CC_HAS_WORKING_NOSANITIZE_ADDRESS
2021-09-24 16:13:34 -07:00
Kconfig.kcsan
kcsan: Make strict mode imply interruptible watchers
2021-07-20 13:49:44 -07:00
Kconfig.kfence
kfence: default to dynamic branch instead of static keys mode
2021-11-12 15:05:49 +01:00
Kconfig.kgdb
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Kconfig.ubsan
ubsan: remove CONFIG_UBSAN_OBJECT_SIZE
2022-04-13 20:59:27 +02:00
kfifo.c
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
klist.c
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kobject_uevent.c
kobject_uevent: remove warning in init_uevent_argv()
2021-04-10 11:09:41 +02:00
kobject.c
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kstrtox.c
Merge branch 'akpm' (patches from Andrew)
2021-07-02 12:08:10 -07:00
kstrtox.h
lib: vsprintf: Fix handling of number field widths in vsscanf
2021-05-19 15:05:11 +02:00
libcrc32c.c
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linear_ranges.c
lib: add linear range get selector within
2021-08-13 18:37:38 +02:00
list_debug.c
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list_sort.c
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
list-test.c
list: test: Add a test for list_is_head()
2022-06-09 10:23:31 +02:00
llist.c
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locking-selftest-hardirq.h
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locking-selftest-mutex.h
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locking-selftest-rlock-hardirq.h
…
locking-selftest-rlock-softirq.h
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locking-selftest-rlock.h
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locking-selftest-rsem.h
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locking-selftest-rtmutex.h
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locking-selftest-softirq.h
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locking-selftest-spin-hardirq.h
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locking-selftest-spin-softirq.h
…
locking-selftest-spin.h
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locking-selftest-wlock-hardirq.h
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locking-selftest-wlock-softirq.h
…
locking-selftest-wlock.h
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locking-selftest-wsem.h
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locking-selftest.c
lockdep/selftest: Remove wait-type RCU_CALLBACK tests
2021-06-22 16:42:08 +02:00
lockref.c
…
logic_iomem.c
lib/logic_iomem: correct fallback config references
2022-04-13 20:58:59 +02:00
logic_pio.c
…
lru_cache.c
lib: remove "expecting prototype" kernel-doc warnings
2021-04-16 16:10:37 -07:00
lshrdi3.c
…
Makefile
crypto: memneq - move into lib/
2022-06-22 14:22:03 +02:00
memcat_p.c
…
memneq.c
crypto: memneq - move into lib/
2022-06-22 14:22:03 +02:00
memory-notifier-error-inject.c
…
memregion.c
…
memweight.c
…
muldi3.c
…
net_utils.c
…
netdev-notifier-error-inject.c
…
nlattr.c
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
nmi_backtrace.c
printk: restore flushing of NMI buffers on remote CPUs after NMI backtraces
2021-11-25 09:48:45 +01:00
nodemask.c
nodemask: Fix return values to be unsigned
2022-06-14 18:36:24 +02:00
notifier-error-inject.c
…
notifier-error-inject.h
…
objagg.c
…
of-reconfig-notifier-error-inject.c
…
oid_registry.c
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
once.c
once: Fix panic when module unload
2021-08-08 13:00:20 +01:00
packing.c
net: update NXP copyright text
2021-09-17 13:52:17 +01:00
parman.c
lib: remove "expecting prototype" kernel-doc warnings
2021-04-16 16:10:37 -07:00
parser.c
kernel.h: split out kstrtox() and simple_strtox() to a separate header
2021-07-01 11:06:05 -07:00
pci_iomap.c
pci_iounmap'2: Electric Boogaloo: try to make sense of it all
2021-09-19 17:13:35 -07:00
percpu_counter.c
lib/percpu_counter: tame kernel-doc compile warning
2021-05-06 19:24:12 -07:00
percpu_test.c
…
percpu-refcount.c
percpu_ref_init(): clean ->percpu_count_ref on failure
2022-06-06 08:43:36 +02:00
plist.c
…
pm-notifier-error-inject.c
…
radix-tree.c
lib: remove "expecting prototype" kernel-doc warnings
2021-04-16 16:10:37 -07:00
random32.c
random: replace custom notifier chain with standard one
2022-05-30 09:29:10 +02:00
ratelimit.c
…
rbtree_test.c
…
rbtree.c
…
refcount.c
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
rhashtable.c
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
sbitmap.c
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
scatterlist.c
Merge branch 'akpm' (patches from Andrew)
2021-09-03 10:08:28 -07:00
seq_buf.c
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
sg_pool.c
lib/scatterlist: Fix wrong update of orig_nents
2021-08-24 19:52:40 -03:00
sg_split.c
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sha1.c
lib/crypto: sha1: re-roll loops to reduce code size
2022-05-30 09:28:59 +02:00
show_mem.c
…
siphash.c
siphash: use one source of truth for siphash permutations
2022-05-30 09:29:15 +02:00
slub_kunit.c
mm/slub, kunit: add a KUnit test for SLUB debugging functionality
2021-06-29 10:53:46 -07:00
smp_processor_id.c
lib/smp_processor_id: Use is_percpu_thread() instead of nr_cpus_allowed
2021-05-19 10:51:40 +02:00
sort.c
lib: fix spelling mistakes
2021-07-08 11:48:20 -07:00
stackdepot.c
stacktrace: move filter_irq_stacks() to kernel/stacktrace.c
2022-04-13 20:59:28 +02:00
stmp_device.c
…
string_helpers.c
string: uninline memcpy_and_pad
2021-11-21 13:44:12 +01:00
string.c
string: improve default out-of-line memcmp() implementation
2021-08-30 07:50:56 -07:00
strncpy_from_user.c
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strnlen_user.c
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syscall.c
sched: Change task_struct::state
2021-06-18 11:43:09 +02:00
test_bitmap.c
lib: test_bitmap: add bitmap_print_bitmask/list_to_buf test cases
2021-08-13 10:27:49 +02:00
test_bitops.c
lib/test: fix spelling mistakes
2021-07-08 11:48:20 -07:00
test_bits.c
…
test_blackhole_dev.c
…
test_bpf.c
bpf/tests: Fix error in tail call limit tests
2021-11-18 19:16:26 +01:00
test_debug_virtual.c
…
test_firmware.c
firmware: replace HOTPLUG with UEVENT in FW_ACTION defines
2021-05-13 16:14:45 +02:00
test_fpu.c
…
test_free_pages.c
…
test_hash.c
…
test_hexdump.c
…
test_hmm_uapi.h
mm: selftests for exclusive device memory
2021-07-01 11:06:03 -07:00
test_hmm.c
mm/hmm.c: allow VM_MIXEDMAP to work with hmm_range_fault
2022-01-27 11:05:43 +01:00
test_ida.c
…
test_kasan_module.c
kasan: test: avoid corrupting memory in kasan_rcu_uaf
2021-09-03 09:58:15 -07:00
test_kasan.c
Merge branch 'akpm' (patches from Andrew)
2021-09-03 10:08:28 -07:00
test_kmod.c
lib/test: use after free in register_test_dev_kmod()
2022-04-08 14:23:54 +02:00
test_linear_ranges.c
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test_list_sort.c
lib/test: convert lib/test_list_sort.c to use KUnit
2021-06-25 11:31:03 -06:00
test_lockup.c
lib/test_lockup: fix kernel pointer check for separate address spaces
2022-04-08 14:24:01 +02:00
test_memcat_p.c
…
test_meminit.c
lib/test_meminit: destroy cache in kmem_cache_alloc_bulk() test
2022-01-27 11:05:44 +01:00
test_min_heap.c
…
test_module.c
…
test_objagg.c
…
test_overflow.c
…
test_parman.c
…
test_printf.c
Merge branch 'akpm' (patches from Andrew)
2021-09-08 12:55:35 -07:00
test_rhashtable.c
…
test_scanf.c
lib/test_scanf: split up number parsing test routines
2021-09-06 11:04:03 -07:00
test_siphash.c
…
test_sort.c
lib/test: convert test_sort.c to use KUnit
2021-09-08 11:50:26 -07:00
test_stackinit.c
lib/test_stackinit: Add assigned initializers
2021-08-22 00:21:36 -07:00
test_static_key_base.c
…
test_static_keys.c
…
test_string.c
lib/test_string.c: allow module removal
2021-07-01 11:06:05 -07:00
test_strscpy.c
…
test_sysctl.c
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test_ubsan.c
ubsan: remove CONFIG_UBSAN_OBJECT_SIZE
2022-04-13 20:59:27 +02:00
test_user_copy.c
…
test_uuid.c
…
test_vmalloc.c
lib/test_vmalloc.c: add a new 'nr_pages' parameter
2021-09-03 09:58:14 -07:00
test_xarray.c
XArray: Fix xas_create_range() when multi-order entry present
2022-04-08 14:24:09 +02:00
test-kstrtox.c
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test-string_helpers.c
string_helpers: Escape double quotes in escape_special
2021-07-19 11:39:28 +02:00
textsearch.c
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timerqueue.c
…
ts_bm.c
…
ts_fsm.c
…
ts_kmp.c
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ubsan.c
kunit: ubsan integration
2021-08-13 13:19:06 -06:00
ubsan.h
…
ucmpdi2.c
…
ucs2_string.c
…
usercopy.c
…
uuid.c
…
vsprintf.c
random: replace custom notifier chain with standard one
2022-05-30 09:29:10 +02:00
win_minmax.c
…
xarray.c
XArray: Update the LRU list in xas_split()
2022-04-08 14:24:09 +02:00
xxhash.c
…