Linus Torvalds
4be6529b71
mmap: relax file size limit for regular files ...
commit 423913ad4ae5b3e8fb8983f70969fb522261ba26 upstream.
Commit be83bbf80682 ("mmap: introduce sane default mmap limits") was
introduced to catch problems in various ad-hoc character device drivers
doing mmap and getting the size limits wrong. In the process, it used
"known good" limits for the normal cases of mapping regular files and
block device drivers.
It turns out that the "s_maxbytes" limit was less "known good" than I
thought. In particular, /proc doesn't set it, but exposes one regular
file to mmap: /proc/vmcore. As a result, that file got limited to the
default MAX_INT s_maxbytes value.
This went unnoticed for a while, because apparently the only thing that
needs it is the s390 kernel zfcpdump, but there might be other tools
that use this too.
Vasily suggested just changing s_maxbytes for all of /proc, which isn't
wrong, but makes me nervous at this stage. So instead, just make the
new mmap limit always be MAX_LFS_FILESIZE for regular files, which won't
affect anything else. It wasn't the regular file case I was worried
about.
I'd really prefer for maxsize to have been per-inode, but that is not
how things are today.
Fixes: be83bbf80682 ("mmap: introduce sane default mmap limits")
Reported-by: Vasily Gorbik <gor@linux.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-06-13 16:16:41 +02:00
kasan: fix memory hotplug during boot
2018-05-30 07:50:17 +02:00
block: fix double-free in the failure path of cgwb_bdi_init()
2017-02-26 11:10:52 +01:00
mm: balloon: use general non-lru movable page feature
2016-07-26 16:19:19 -07:00
mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping
2016-10-11 15:06:33 -07:00
cleancache: constify cleancache_ops structure
2016-01-27 09:09:57 -05:00
cma: fix calculation of aligned offset
2018-01-31 12:55:51 +01:00
mm, compaction: fix NR_ISOLATED_* stats for pfn based migration
2017-01-12 11:39:32 +01:00
mm: clarify why we avoid page_mapcount() for slab pages in dump_page()
2016-10-07 18:46:29 -07:00
mm/page_ref: add tracepoint to track down page reference manipulation
2016-03-17 15:09:34 -07:00
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep
2018-02-25 11:05:49 +01:00
mm/fadvise: discard partial page if endbyte is also EOF
2018-05-30 07:50:23 +02:00
mm: fault-inject take over bootstrap kmem_cache check
2016-03-15 16:55:16 -07:00
mm/filemap.c: fix NULL pointer in page_cache_tree_insert()
2018-04-24 09:34:18 +02:00
mm: fail get_vaddr_frames() for filesystem-dax mappings
2018-02-28 10:18:34 +01:00
mm, frontswap: convert frontswap_enabled to static key
2016-07-26 16:19:19 -07:00
proc: do not access cmdline nor environ from file-backed areas
2018-05-19 10:27:00 +02:00
mm/highmem: make nr_free_highpages() handles all highmem zones by itself
2016-05-19 19:12:14 -07:00
mm, thp: do not cause memcg oom for thp
2018-05-30 07:50:38 +02:00
mm, hugetlbfs: introduce ->split() to vm_operations_struct
2017-12-05 11:24:32 +01:00
mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size
2016-05-20 17:58:30 -07:00
hwpoison: use page_cgroup_ino for filtering by memcg
2015-09-10 13:29:01 -07:00
mm: Add a user_ns owner to mm_struct and fix ptrace permission checks
2017-01-06 10:40:13 +01:00
mm: fix 100% CPU kswapd busyloop on unreclaimable nodes
2018-01-31 12:55:53 +01:00
mm: don't allow deferred pages with NEED_PER_CPU_KM
2018-05-22 16:57:57 +02:00
PM / Hibernate: allow hibernation with PAGE_POISONING_ZERO
2016-09-13 02:35:27 +02:00
mm, thp: do not cause memcg oom for thp
2018-05-30 07:50:38 +02:00
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
mm/kmemleak.c: wait for scan completion before disabling free
2018-05-30 07:50:39 +02:00
mm/ksm: fix interaction with THP
2018-05-30 07:50:41 +02:00
mm/list_lru.c: fix list_lru_count_node() to be race free
2017-07-21 07:42:21 +02:00
x86: remove more uaccess_32.h complexity
2016-05-22 17:21:27 -07:00
mm/madvise.c: fix madvise() infinite loop under special circumstances
2017-12-05 11:24:32 +01:00
Disable the __builtin_return_address() warning globally after all
2016-10-12 10:23:41 -07:00
mm/memblock.c: reversed logic in memblock_discard()
2017-08-30 10:21:47 +02:00
hwpoison, memcg: forcibly uncharge LRU pages
2018-01-31 12:55:51 +01:00
mm: hwpoison: call shake_page() after try_to_unmap() for mlocked page
2018-03-24 11:00:21 +01:00
mm: avoid spurious 'bad pmd' warning messages
2018-02-28 10:18:33 +01:00
mm/memory_hotplug: set magic number to page->freelist instead of page->lru.next
2017-10-21 17:21:36 +02:00
mm/mempolicy.c: avoid use uninitialized preferred_node
2018-05-30 07:50:38 +02:00
Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements"
2016-07-28 16:07:41 -07:00
memtest: remove unused header files
2015-09-08 15:35:28 -07:00
Sanitize 'move_pages()' permission checks
2017-08-24 17:12:21 -07:00
mm, swap: use offset of swap entry as key of swap cache
2016-10-07 18:46:28 -07:00
mlock: fix mlock count can not decrease in race condition
2017-06-07 12:07:49 +02:00
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
mmap: relax file size limit for regular files
2018-06-13 16:16:41 +02:00
mm/mmu_context, sched/core: Fix mmu_context.h assumption
2016-04-28 11:44:19 +02:00
fix Christoph's email addresses
2016-03-17 15:09:34 -07:00
mm, page_alloc: inline the fast path of the zonelist iterator
2016-05-19 19:12:14 -07:00
mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries
2017-08-11 08:49:29 -07:00
mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries
2017-08-11 08:49:29 -07:00
mm/msync: use offset_in_page macro
2015-11-05 19:34:48 -08:00
mm: discard memblock data later
2017-08-24 17:12:19 -07:00
ptrace: Don't allow accessing an undumpable mm
2017-01-06 10:40:13 +01:00
mm, oom_reaper: gather each vma to prevent leaking TLB entry
2017-12-09 22:01:47 +01:00
writeback: safer lock nesting
2018-04-24 09:34:18 +02:00
mm: fix 100% CPU kswapd busyloop on unreclaimable nodes
2018-01-31 12:55:53 +01:00
mm: page_counter: let page_counter_try_charge() return bool
2015-11-05 19:34:48 -08:00
mm/page_ext: support extra space allocation by page_ext user
2016-10-07 18:46:27 -07:00
mm, vmscan: move lru_lock to the node
2016-07-28 16:07:41 -07:00
mm/page_io.c: replace some BUG_ON()s with VM_BUG_ON_PAGE()
2016-10-07 18:46:29 -07:00
mm/page_isolation: fix typo: "paes" -> "pages"
2016-10-07 18:46:29 -07:00
mm/page_owner: don't define fields on struct page_ext by hard-coding
2016-10-07 18:46:27 -07:00
mm: check the return value of lookup_page_ext for all call sites
2016-06-03 15:06:22 -07:00
mm/pagewalk.c: report holes in hugetlb ranges
2017-11-24 08:33:42 +01:00
mm: percpu: use pr_fmt to prefix output
2016-03-17 15:09:34 -07:00
percpu: include linux/sched.h for cond_resched()
2018-05-09 09:50:18 +02:00
mm/thp/migration: switch from flush_tlb_range to flush_pmd_tlb_range
2016-03-17 15:09:34 -07:00
mm: remove write/force parameters from __get_user_pages_unlocked()
2016-10-18 14:13:37 -07:00
fix Christoph's email addresses
2016-03-17 15:09:34 -07:00
mm: silently skip readahead for DAX inodes
2016-08-26 17:39:35 -07:00
mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries
2017-08-11 08:49:29 -07:00
mm/shmem: do not wait for lock_page() in shmem_unused_huge_shrink()
2018-03-28 18:39:22 +02:00
mm, slab: reschedule cache_reap() on the same CPU
2018-04-24 09:34:09 +02:00
slub: move synchronize_sched out of slab_mutex on shrink
2017-03-22 12:43:38 +01:00
slub: do not merge cache if slub_debug contains a never-merge flag
2017-10-21 17:21:36 +02:00
slub: move synchronize_sched out of slab_mutex on shrink
2017-03-22 12:43:38 +01:00
mm/slub.c: trace free objects at KERN_INFO
2017-06-07 12:07:49 +02:00
treewide: replace obsolete _refok by __ref
2016-08-02 17:31:41 -04:00
mm/memory_hotplug: set magic number to page->freelist instead of page->lru.next
2017-10-21 17:21:36 +02:00
thp: reduce usage of huge zero page's atomic counter
2016-10-07 18:46:28 -07:00
mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()
2017-07-05 14:40:17 +02:00
mm, swap: use offset of swap entry as key of swap cache
2016-10-07 18:46:28 -07:00
swap: divide-by-zero when zero length swap file on ssd
2018-05-30 07:50:40 +02:00
fs: add i_blocksize()
2017-06-14 15:06:00 +02:00
mm: usercopy: Check for module addresses
2016-09-20 16:07:39 -07:00
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
Provide a function to create a NUL-terminated string from unterminated data
2018-02-25 11:05:41 +01:00
mm: unrig VMA cache hit ratio
2016-10-07 18:46:27 -07:00
mm/vmalloc.c: huge-vmap: fail gracefully on unexpected huge vmap mappings
2017-07-05 14:40:28 +02:00
mm: vmpressure: fix sending wrong events on underflow
2017-03-12 06:41:43 +01:00
mm: fix the NULL mapping case in __isolate_lru_page()
2018-06-06 16:44:39 +02:00
mm, vmstat: Remove spurious WARN() during zoneinfo print
2018-04-13 19:47:55 +02:00
mm: workingset: fix premature shadow node shrinking with cgroups
2017-04-08 09:30:36 +02:00
mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup
2016-06-03 16:02:55 -07:00
mm/zbud.c: use list_last_entry() instead of list_tail_entry()
2016-01-15 11:40:52 -08:00
mm: zsmalloc: constify struct zs_pool name
2015-11-06 17:50:42 -08:00
zsmalloc: calling zs_map_object() from irq is a bug
2017-12-14 09:28:23 +01:00
zswap: don't param_set_charp while holding spinlock
2018-01-17 09:38:52 +01:00
4be6529b71