Vijayanand Jitta
c6efde4313
mm: vmalloc: prevent use after free in _vm_unmap_aliases ...
A potential use after free can occur in _vm_unmap_aliases where an already
freed vmap_area could be accessed, Consider the following scenario:
Process 1 Process 2
__vm_unmap_aliases __vm_unmap_aliases
purge_fragmented_blocks_allcpus rcu_read_lock()
rcu_read_lock()
list_del_rcu(&vb->free_list)
list_for_each_entry_rcu(vb .. )
__purge_vmap_area_lazy
kmem_cache_free(va)
va_start = vb->va->va_start
Here Process 1 is in purge path and it does list_del_rcu on vmap_block and
later frees the vmap_area, since Process 2 was holding the rcu lock at
this time vmap_block will still be present in and Process 2 accesse it and
thereby it tries to access vmap_area of that vmap_block which was already
freed by Process 1 and this results in use after free.
Fix this by adding a check for vb->dirty before accessing vmap_area
structure since vb->dirty will be set to VMAP_BBMAP_BITS in purge path
checking for this will prevent the use after free.
Change-Id: Ibba0e2ee0d0f049aa0158b78b086aeaad6b70f68
Link: https://lkml.kernel.org/r/1616062105-23263-1-git-send-email-vjitta@codeaurora.org
Signed-off-by: Vijayanand Jitta <vjitta@codeaurora.org>
Git-Commit: ad216c0316ad6391d90f4de0a7f59396b2925a06
Git-Repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-07-29 20:47:17 -07:00
Merge android-5.4-stable.45 ( a9a13ee) into msm-5.4
2020-07-09 17:51:24 -07:00
bdi: add a ->dev_name field to struct backing_dev_info
2020-05-14 07:58:30 +02:00
Merge android11-5.4.86+ ( 7d99cf8) into msm-5.4
2021-06-07 15:17:29 +05:30
Revert "Revert "mm: cma: make writeable CMA debugfs optional""
2020-12-17 15:22:06 +05:30
mem-offline: improve the effective utilization of movable zone
2020-09-04 06:15:14 -07:00
mm/debug.c: always print flags in dump_page()
2020-03-05 16:43:51 +01:00
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
mm/gup: fix memory leak in __gup_benchmark_ioctl
2020-01-09 10:20:00 +01:00
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup()
2019-11-15 18:34:00 -08:00
mm: protect mm_rb tree with a rwlock
2020-06-11 16:02:05 +05:30
mm: provide speculative fault infrastructure
2020-06-11 16:02:05 +05:30
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
mm, page_owner: set page owner info for tail pages
2020-02-27 15:13:14 -08:00
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
mm/kmemleak.c: use address-of operator on section symbols
2020-10-01 13:17:53 +02:00
mm/ksm: Remove reuse_ksm_page()
2020-11-30 18:16:52 -08:00
mm: list_lru: set shrinker map bit when child nr_items is not zero
2020-12-11 13:23:31 +01:00
uaccess: Add non-pagefault user-space write function
2020-01-17 19:48:40 +01:00
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
Merge "mm: Add notifier framework for showing memory"
2019-10-11 23:42:08 -07:00
Merge android11-5.4.61+ ( e0b1644) into msm-5.4
2020-12-18 12:47:46 +05:30
mm: memcg/slab: fix root memcg vmstats
2020-11-24 13:29:24 +01:00
mm: Enhance per process reclaim to consider shared pages
2020-06-02 21:31:03 -07:00
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
mm/memory_hotplug: shrink zones when offlining memory
2020-01-09 10:19:56 +01:00
mm/migrate: Pass vm_fault pointer to migrate_misplaced_page()
2020-06-11 16:02:03 +05:30
mm: protect VMA modifications using VMA sequence count
2020-06-09 10:55:00 +05:30
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
mm: fix kthread_use_mm() vs TLB invalidate
2020-09-03 11:26:51 +02:00
mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush
2020-02-11 04:35:42 -08:00
mm/mmu_notifiers: use the right return code for WARN_ON
2019-11-06 08:47:50 -08:00
Revert "BACKPORT: FROMGIT: mm: improve mprotect(R|W) efficiency on pages referenced once"
2021-01-18 16:25:18 +00:00
Merge android-5.4-stable.45 ( a9a13ee) into msm-5.4
2020-07-09 17:51:24 -07:00
x86/mm: split vmalloc_sync_all()
2020-03-25 08:25:58 +01:00
Merge "mm/oom_kill: defer panic_on_oom for a timeout"
2020-11-11 23:35:25 -08:00
ANDROID: Add OWNERS files referring to the respective android-mainline OWNERS
2021-04-01 13:45:14 +00:00
mm/page-writeback.c: avoid potential division by zero in wb_min_max_ratio()
2020-01-23 08:22:41 +01:00
Merge "Merge android11-5.4.86+ ( 5d7dfa3) into msm-5.4"
2021-04-26 08:14:44 -07:00
Revert "ANDROID: Revert: Merge 5.4.60 into android11-5.4"
2020-08-23 13:12:51 +02:00
mm: fix the page_owner initializing issue for arm32
2020-09-29 12:42:42 +08:00
Merge android-5.4.24 ( ce5de62) into msm-5.4
2020-04-14 08:25:29 -07:00
mm/memory_hotplug: drain per-cpu pages again during memory offline
2020-11-23 17:03:25 +05:30
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
debug-pagealloc: Panic on pagealloc corruption
2020-08-25 11:46:48 -07:00
mm: pagewalk: fix termination condition in walk_pte_range()
2020-10-01 13:17:30 +02:00
percpu: fix first chunk size calculation for populated bitmap
2020-09-23 12:40:45 +02:00
mm: introduce __page_add_new_anon_rmap()
2020-06-11 16:02:04 +05:30
Merge android-5.4-stable.45 ( a9a13ee) into msm-5.4
2020-07-09 17:51:24 -07:00
mm: showmem: make the notifiers atomic
2019-10-10 12:39:04 -07:00
mm/shuffle: don't move pages between zones and don't read garbage memmaps
2020-09-03 11:26:51 +02:00
soc: qcom: Enable slabinfo support in minidump
2020-09-07 09:23:52 -07:00
mm: slab: make page_cgroup_ino() to recognize non-compound slab pages properly
2019-11-06 08:47:50 -08:00
soc: qcom: Enable slabinfo support in minidump
2020-09-07 09:23:52 -07:00
UPSTREAM: mm/sl[uo]b: export __kmalloc_track(_node)_caller
2020-11-02 16:12:00 +00:00
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
mm/sparse: fix kernel crash with pfn_section_valid check
2020-04-01 11:02:03 +02:00
mm: introduce __lru_cache_add_active_or_unevictable
2020-06-11 16:02:03 +05:30
mm: swap: Add null pointer check
2020-01-10 11:23:22 -08:00
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
This is the 5.4.83 stable release
2020-12-11 15:00:01 +01:00
mm/thp: allow dropping THP from page cache
2019-10-19 06:32:33 -04:00
mm: usercopy: skip stack page span check
2019-12-02 15:36:05 -08:00
Merge android-5.4.24 ( ce5de62) into msm-5.4
2020-04-14 08:25:29 -07:00
mm: add kvfree_sensitive() for freeing sensitive data objects
2020-06-17 16:40:23 +02:00
mm: vmalloc: prevent use after free in _vm_unmap_aliases
2021-07-29 20:47:17 -07:00
mm/vmpressure.c: fix a signedness bug in vmpressure_register_event()
2019-10-07 15:47:19 -07:00
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
Merge android11-5.4.61+ ( 8540985) into msm-5.4
2020-10-19 10:50:25 -07:00
mm: workingset: remove zero-seek setting for shadow node shrinker
2020-04-06 23:51:59 -07:00
mm/z3fold.c: claim page in the beginning of free
2019-10-07 15:47:19 -07:00
Merge android11-5.4.86+ ( 75c93eb) into msm-5.4
2021-04-22 09:44:51 +05:30
c6efde4313