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linux-2.6/mm
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Hugh Dickins 14fcc23fdc tmpfs: fix kernel BUG in shmem_delete_inode 
SuSE's insserve initscript ordering program hits kernel BUG at mm/shmem.c:814
on 2.6.26.  It's using posix_fadvise on directories, and the shmem_readpage
method added in 2.6.23 is letting POSIX_FADV_WILLNEED allocate useless pages
to a tmpfs directory, incrementing i_blocks count but never decrementing it.

Fix this by assigning shmem_aops (pointing to readpage and writepage and
set_page_dirty) only when it's needed, on a regular file or a long symlink.

Many thanks to Kel for outstanding bugreport and steps to reproduce it.

Reported-by: Kel Modderman <kel@otaku42.de>
Tested-by: Kel Modderman <kel@otaku42.de>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: <stable@kernel.org>		[2.6.25.x, 2.6.26.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2008-07-28 16:30:20 -07:00
..
Kconfig x86: lockless get_user_pages_fast() 2008-07-26 12:00:06 -07:00
Makefile mm: remove mm_init compilation dependency on CONFIG_DEBUG_MEMORY_INIT 2008-07-24 10:47:17 -07:00
allocpercpu.c mm/allocpercpu.c: make 4 functions static 2008-07-26 12:00:12 -07:00
backing-dev.c mm: bdi: fix race in bdi_class device creation 2008-05-20 13:31:53 -07:00
bootmem.c bootmem: replace node_boot_start in struct bootmem_data 2008-07-24 10:47:20 -07:00
bounce.c
…
dmapool.c dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too 2008-04-28 08:58:20 -07:00
fadvise.c xip: support non-struct page backed memory 2008-04-28 08:58:23 -07:00
filemap.c [patch 3/5] vfs: change remove_suid() to file_remove_suid() 2008-07-26 20:53:16 -04:00
filemap_xip.c [patch 3/5] vfs: change remove_suid() to file_remove_suid() 2008-07-26 20:53:16 -04:00
fremap.c mm: fix various kernel-doc comments 2008-03-19 18:53:35 -07:00
highmem.c highmem: Export totalhigh_pages. 2008-07-19 22:39:46 -07:00
hugetlb.c hugetlb: fix CONFIG_SYSCTL=n build 2008-07-26 12:00:01 -07:00
internal.h mm: export prep_compound_page to mm 2008-07-24 10:47:17 -07:00
maccess.c kgdb: fix optional arch functions and probe_kernel_* 2008-04-17 20:05:39 +02:00
madvise.c xip: support non-struct page backed memory 2008-04-28 08:58:23 -07:00
memcontrol.c memcg: limit change shrink usage 2008-07-25 10:53:37 -07:00
memory.c make mm/memory.c:print_bad_pte() static 2008-07-26 12:00:12 -07:00
memory_hotplug.c memory-hotplug: add sysfs removable attribute for hotplug memory remove 2008-07-24 10:47:21 -07:00
mempolicy.c hugetlb: modular state for hugetlb page size 2008-07-24 10:47:17 -07:00
mempool.c
…
migrate.c mm: spinlock tree_lock 2008-07-26 12:00:06 -07:00
mincore.c mm: remove nopage 2008-04-28 08:58:18 -07:00
mlock.c
…
mm_init.c mm: create /sys/kernel/mm 2008-07-24 10:47:17 -07:00
mmap.c hugetlb: modular state for hugetlb page size 2008-07-24 10:47:17 -07:00
mmzone.c mm: filter based on a nodemask as well as a gfp_mask 2008-04-28 08:58:19 -07:00
mprotect.c mm: record MAP_NORESERVE status on vmas and fix small page mprotect reservations 2008-07-24 10:47:16 -07:00
mremap.c
…
msync.c
…
nommu.c tracehook: tracehook_expect_breakpoints 2008-07-26 12:00:09 -07:00
oom_kill.c oom_kill: remove unused parameter in badness() 2008-04-28 08:58:26 -07:00
page-writeback.c mm: spinlock tree_lock 2008-07-26 12:00:06 -07:00
page_alloc.c stop_machine: Wean existing callers off stop_machine_run() 2008-07-28 12:16:31 +10:00
page_io.c
…
page_isolation.c
…
pagewalk.c pagemap: pass mm into pagewalkers 2008-06-12 18:05:41 -07:00
pdflush.c pdflush: use time_after() instead of open-coding it 2008-07-25 10:53:28 -07:00
prio_tree.c
…
quicklist.c
…
readahead.c mm: readahead scan lockless 2008-07-26 12:00:06 -07:00
rmap.c SL*B: drop kmem cache argument from constructor 2008-07-26 12:00:07 -07:00
shmem.c tmpfs: fix kernel BUG in shmem_delete_inode 2008-07-28 16:30:20 -07:00
shmem_acl.c [PATCH] sanitize ->permission() prototype 2008-07-26 20:53:14 -04:00
slab.c SL*B: drop kmem cache argument from constructor 2008-07-26 12:00:07 -07:00
slob.c SL*B: drop kmem cache argument from constructor 2008-07-26 12:00:07 -07:00
slub.c SL*B: drop kmem cache argument from constructor 2008-07-26 12:00:07 -07:00
sparse-vmemmap.c Christoph has moved 2008-07-04 10:40:04 -07:00
sparse.c make mm/sparse.c: make a function static 2008-07-26 12:00:12 -07:00
swap.c mm: remove initialization of static per-cpu variables 2008-07-24 10:47:21 -07:00
swap_state.c mm: print swapcache page count in show_swap_cache_info() 2008-07-26 12:00:10 -07:00
swapfile.c mm/swapfile.c: make code static 2008-07-26 12:00:12 -07:00
thrash.c
…
tiny-shmem.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2008-03-25 08:57:47 -07:00
truncate.c mm: spinlock tree_lock 2008-07-26 12:00:06 -07:00
util.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-26 20:17:56 -07:00
vmalloc.c Use WARN() in mm/vmalloc.c 2008-07-26 12:00:07 -07:00
vmscan.c mm: spinlock tree_lock 2008-07-26 12:00:06 -07:00
vmstat.c mm/vmstat.c: proper externs 2008-07-24 10:47:14 -07:00