Ming Lei 3d77b50c58 lib/scatterlist.c: don't flush_kernel_dcache_page on slab page ... Commit b1adaf65ba ("[SCSI] block: add sg buffer copy helper functions") introduces two sg buffer copy helpers, and calls flush_kernel_dcache_page() on pages in SG list after these pages are written to. Unfortunately, the commit may introduce a potential bug: - Before sending some SCSI commands, kmalloc() buffer may be passed to block layper, so flush_kernel_dcache_page() can see a slab page finally - According to cachetlb.txt, flush_kernel_dcache_page() is only called on "a user page", which surely can't be a slab page. - ARCH's implementation of flush_kernel_dcache_page() may use page mapping information to do optimization so page_mapping() will see the slab page, then VM_BUG_ON() is triggered. Aaro Koskinen reported the bug on ARM/kirkwood when DEBUG_VM is enabled, and this patch fixes the bug by adding test of '!PageSlab(miter->page)' before calling flush_kernel_dcache_page(). Signed-off-by: Ming Lei <ming.lei@canonical.com> Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi> Tested-by: Simon Baatz <gmbnomis@gmail.com> Cc: Russell King - ARM Linux <linux@arm.linux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Tejun Heo <tj@kernel.org> Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: <stable@vger.kernel.org> [3.2+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-10-31 16:58:13 -07:00
..
fonts	lib: Move fonts from drivers/video/console/ to lib/fonts/	2013-06-28 10:28:22 +02:00
lz4	lz4: fix compression/decompression signedness mismatch	2013-09-11 15:59:45 -07:00
lzo
mpi	alpha: Modernize lib/mpi/longlong.h	2013-07-19 13:54:23 -07:00
raid6	md update for v3.12	2013-09-10 13:03:41 -07:00
reed_solomon
xz
zlib_deflate
zlib_inflate
.gitignore
argv_split.c
asn1_decoder.c
atomic64_test.c
atomic64.c
audit.c
average.c
bcd.c
bch.c
bitmap.c
bitrev.c
bsearch.c
btree.c
bug.c
build_OID_registry	X.509: do not emit any informational output	2013-06-19 17:54:06 +02:00
bust_spinlocks.c
check_signature.c
checksum.c
clz_ctz.c	lib: add weak clz/ctz functions	2013-07-09 10:33:30 -07:00
clz_tab.c
cmdline.c
cordic.c
cpu_rmap.c	Remove GENERIC_HARDIRQ config option	2013-09-13 15:09:52 +02:00
cpu-notifier-error-inject.c
cpumask.c
crc7.c
crc8.c
crc16.c
crc32.c	lib/crc32: update the comments of crc32_{be,le}_generic()	2013-09-11 15:58:38 -07:00
crc32defs.h
crc-ccitt.c
crc-itu-t.c
crc-t10dif.c	crypto: crct10dif - Add fallback for broken initrds	2013-09-12 15:31:34 +10:00
ctype.c
debug_locks.c	mutex: Add support for wound/wait style locks	2013-06-26 12:10:56 +02:00
debugobjects.c	debugobjects: Make debug_object_activate() return status	2013-08-18 17:39:55 -07:00
dec_and_lock.c
decompress_bunzip2.c
decompress_inflate.c	lib/decompressors: fix "no limit" output buffer length	2013-09-11 15:58:38 -07:00
decompress_unlz4.c	lib: add support for LZ4-compressed kernel	2013-07-09 10:33:30 -07:00
decompress_unlzma.c
decompress_unlzo.c
decompress_unxz.c
decompress.c	lib: add support for LZ4-compressed kernel	2013-07-09 10:33:30 -07:00
devres.c
digsig.c
div64.c	math64: New separate div64_u64_rem helper	2013-08-23 09:02:14 -04:00
dma-debug.c
dump_stack.c	x86, asmlinkage: Make dump_stack visible	2013-08-06 14:21:01 -07:00
dynamic_debug.c	dynamic debug: line queries failing due to uninitialized local variable	2013-08-28 12:10:53 -07:00
dynamic_queue_limits.c
earlycpio.c	earlycpio.c: Fix the confusing comment of find_cpio_data().	2013-08-14 23:24:01 +02:00
extable.c
fault-inject.c
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
fdt.c
find_last_bit.c
find_next_bit.c
flex_array.c
flex_proportions.c
gcd.c
gen_crc32table.c
genalloc.c	lib/genalloc.c: correct dev_get_gen_pool documentation	2013-09-11 15:58:38 -07:00
halfmd4.c
hexdump.c	lib: introduce upper case hex ascii helpers	2013-09-20 15:38:26 -04:00
hweight.c
idr.c	idr: print a stack dump after ida_remove warning	2013-07-03 16:08:04 -07:00
inflate.c
int_sqrt.c
interval_tree_test_main.c
interval_tree.c
iomap_copy.c
iomap.c
iommu-helper.c
ioremap.c
iovec.c
irq_regs.c
is_single_threaded.c
jedec_ddr_data.c
kasprintf.c
Kconfig	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2013-09-07 14:31:18 -07:00
Kconfig.debug	Kconfig: make KOBJECT_RELEASE debugging require timer debugging	2013-10-29 08:33:36 -07:00
Kconfig.kgdb
Kconfig.kmemcheck
kfifo.c
klist.c
kobject_uevent.c
kobject.c	kobject: show debug info on delayed kobject release	2013-10-10 13:56:52 -07:00
kstrtox.c
kstrtox.h
lcm.c
libcrc32c.c
list_debug.c
list_sort.c
llist.c	llist: fix/simplify llist_add() and llist_add_batch()	2013-07-13 13:29:24 +04:00
locking-selftest-hardirq.h
locking-selftest-mutex.h
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h
locking-selftest-rsem.h
locking-selftest-softirq.h
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h
locking-selftest-wsem.h
locking-selftest.c	mutex: Move ww_mutex definitions to ww_mutex.h	2013-07-12 12:07:46 +02:00
lockref.c	lockref: use arch_mutex_cpu_relax() in CMPXCHG_LOOP()	2013-09-28 12:46:24 +02:00
lru_cache.c
Makefile	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2013-09-12 16:11:45 -07:00
md5.c
memory-notifier-error-inject.c
memweight.c
net_utils.c
nlattr.c
notifier-error-inject.c
notifier-error-inject.h
of-reconfig-notifier-error-inject.c
oid_registry.c
parser.c
pci_iomap.c
percpu_counter.c	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
percpu_ida.c	idr: Percpu ida	2013-09-09 14:29:15 -07:00
percpu-refcount.c	percpu_refcount: export symbols	2013-10-16 21:35:53 -07:00
percpu-rwsem.c
plist.c
pm-notifier-error-inject.c
prio_heap.c
proportions.c
radix-tree.c	lib/radix-tree.c: make radix_tree_node_alloc() work correctly within interrupt	2013-09-11 15:59:36 -07:00
random32.c
ratelimit.c
rational.c
rbtree_test.c	rbtree_test: add test for postorder iteration	2013-09-11 15:59:20 -07:00
rbtree.c	rbtree: add postorder iteration functions	2013-09-11 15:59:19 -07:00
reciprocal_div.c
rwsem-spinlock.c
rwsem.c
scatterlist.c	lib/scatterlist.c: don't flush_kernel_dcache_page on slab page	2013-10-31 16:58:13 -07:00
sha1.c
show_mem.c
smp_processor_id.c
sort.c
spinlock_debug.c
stmp_device.c
string_helpers.c
string.c
strncpy_from_user.c
strnlen_user.c
swiotlb.c	swiotlb: replace dma_length with sg_dma_len() macro	2013-08-09 11:28:42 -04:00
syscall.c
test-kstrtox.c
test-string_helpers.c
textsearch.c
timerqueue.c
ts_bm.c
ts_fsm.c
ts_kmp.c
ucs2_string.c
usercopy.c
uuid.c
vsprintf.c	add formats for dentry/file pathnames	2013-09-04 00:13:11 -04:00