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Filename Latest commit message Latest commit date
Vitaly Wool bb9a374dfa mm/z3fold: don't try to use buddy slots after free 
As reported by Henry Burns:

Running z3fold stress testing with address sanitization showed zhdr->slots
was being used after it was freed.

  z3fold_free(z3fold_pool, handle)
    free_handle(handle)
      kmem_cache_free(pool->c_handle, zhdr->slots)
    release_z3fold_page_locked_list(kref)
      __release_z3fold_page(zhdr, true)
        zhdr_to_pool(zhdr)
          slots_to_pool(zhdr->slots)  *BOOM*

To fix this, add pointer to the pool back to z3fold_header and modify
zhdr_to_pool to return zhdr->pool.

Link: http://lkml.kernel.org/r/20190708134808.e89f3bfadd9f6ffd7eff9ba9@gmail.com
Fixes: 7c2b8baa61  ("mm/z3fold.c: add structure for buddy handles")
Signed-off-by: Vitaly Wool <vitalywool@gmail.com>
Reported-by: Henry Burns <henryburns@google.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Jonathan Adams <jwadams@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-16 19:23:21 -07:00
arch Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-07-15 21:10:39 -07:00
block
certs
crypto
Documentation for-linus-20190715 2019-07-15 21:20:52 -07:00
drivers - New Functionality 2019-07-16 09:25:04 -07:00
fs for-linus-20190715 2019-07-15 21:20:52 -07:00
include for-linus-20190715 2019-07-15 21:20:52 -07:00
init Kbuild updates for v5.3 2019-07-12 16:03:16 -07:00
ipc
kernel pci-v5.3-changes 2019-07-15 20:44:49 -07:00
lib 5.3 Merge window RDMA pull request 2019-07-15 20:38:15 -07:00
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mm mm/z3fold: don't try to use buddy slots after free 2019-07-16 19:23:21 -07:00
net pci-v5.3-changes 2019-07-15 20:44:49 -07:00
samples Kbuild updates for v5.3 2019-07-12 16:03:16 -07:00
scripts stream_open related bits for Linux 5.3 2019-07-14 17:08:08 -07:00
security
sound Driver Core and debugfs changes for 5.3-rc1 2019-07-12 12:24:03 -07:00
tools pci-v5.3-changes 2019-07-15 20:44:49 -07:00
usr
virt ARM: 2019-07-12 15:35:14 -07:00
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MAINTAINERS for-linus-20190715 2019-07-15 21:20:52 -07:00
Makefile Kbuild updates for v5.3 2019-07-12 16:03:16 -07:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.