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Linus Torvalds d19cc4bfbf Add check of order < 0 before calling free_pages() 
The function addresses that are traced by ftrace are stored in pages,
 and the size is held in a variable. If there's some error in creating
 them, the allocate ones will be freed. In this case, it is possible that
 the order of pages to be freed may end up being negative due to a size of
 zero passed to get_count_order(), and then that negative number will cause
 free_pages() to free a very large section. Make sure that does not happen.
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Merge tag 'trace-v5.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull ftrace fix from Steven Rostedt:
 "Add check of order < 0 before calling free_pages()

  The function addresses that are traced by ftrace are stored in pages,
  and the size is held in a variable. If there's some error in creating
  them, the allocate ones will be freed. In this case, it is possible
  that the order of pages to be freed may end up being negative due to a
  size of zero passed to get_count_order(), and then that negative
  number will cause free_pages() to free a very large section.

  Make sure that does not happen"

* tag 'trace-v5.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftrace: Check if pages were allocated before calling free_pages()
2021-03-31 10:14:55 -07:00
arch s390 updates for 5.12-rc6 2021-03-30 10:54:22 -07:00
block block: don't create too many partitions 2021-03-27 09:22:18 -06:00
certs
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Documentation
drivers Pin control fixes for the v5.12 kernel cycle: 2021-03-31 10:09:44 -07:00
fs reiserfs: update reiserfs_xattrs_initialized() condition 2021-03-30 14:27:32 -07:00
include Fix the non-debug mutex_lock_io_nested() method to map to mutex_lock_io() instead of mutex_lock(). 2021-03-28 12:12:22 -07:00
init
ipc
kernel Add check of order < 0 before calling free_pages() 2021-03-31 10:14:55 -07:00
lib
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mm mm: fix race by making init_zero_pfn() early_initcall 2021-03-30 09:46:12 -07:00
net
samples
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tools Some more perf tools fixes for v5.12: 2021-03-28 13:22:54 -07:00
usr
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MAINTAINERS s390 updates for 5.12-rc6 2021-03-30 10:54:22 -07:00
Makefile Linux 5.12-rc5 2021-03-28 15:48:16 -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.