yonghua zheng 8c8296223f fs/proc/task_mmu.c: fix buffer overflow in add_page_map() ...

Recently we met quite a lot of random kernel panic issues after enabling
CONFIG_PROC_PAGE_MONITOR.  After debuggind we found this has something
to do with following bug in pagemap:

In struct pagemapread:

  struct pagemapread {
      int pos, len;
      pagemap_entry_t *buffer;
      bool v2;
  };

pos is number of PM_ENTRY_BYTES in buffer, but len is the size of
buffer, it is a mistake to compare pos and len in add_page_map() for
checking buffer is full or not, and this can lead to buffer overflow and
random kernel panic issue.

Correct len to be total number of PM_ENTRY_BYTES in buffer.

[akpm@linux-foundation.org: document pagemapread.pos and .len units, fix PM_ENTRY_BYTES definition]
Signed-off-by: Yonghua Zheng <younghua.zheng@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2013-08-13 17:57:50 -07:00

..

array.c

kthread: Prevent unpark race which puts threads on the wrong cpu

2013-04-12 14:18:43 +02:00

base.c

proc_fill_cache(): clean up, get rid of pointless find_inode_number() use

2013-06-29 12:57:19 +04:00

cmdline.c

proc: switch /proc/cmdline to seq_file

2008-10-23 14:29:04 +04:00

consoles.c

console: rename acquire/release_console_sem() to console_lock/unlock()

2011-01-26 10:50:06 +10:00

cpuinfo.c

proc: move /proc/cpuinfo code to fs/proc/cpuinfo.c

2008-10-23 15:05:11 +04:00

devices.c

proc: use seq_puts()/seq_putc() where possible

2011-01-13 08:03:16 -08:00

fd.c

proc_fill_cache(): just make instantiate_t return int

2013-06-29 12:57:18 +04:00

fd.h

proc: Move proc_fd() to fs/proc/fd.h

2013-05-01 17:29:39 -04:00

generic.c

[readdir] convert procfs

2013-06-29 12:56:32 +04:00

inode.c

proc: Split the namespace stuff out into linux/proc_ns.h

2013-05-01 17:29:39 -04:00

internal.h

proc_fill_cache(): just make instantiate_t return int

2013-06-29 12:57:18 +04:00

interrupts.c

proc: move /proc/interrupts boilerplate code to fs/proc/interrupts.c

2008-10-23 15:15:46 +04:00

Kconfig

kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT

2011-01-20 17:02:05 -08:00

kcore.c

fs/proc/kcore.c: using strlcpy() instead of strncpy()

2013-07-03 16:08:02 -07:00

kmsg.c

kmsg: honor dmesg_restrict sysctl on /dev/kmsg

2013-06-12 16:29:44 -07:00

loadavg.c

sched, timers: cleanup avenrun users

2009-05-15 15:32:45 +02:00

Makefile

mm, vmalloc: move get_vmalloc_info() to vmalloc.c

2013-04-29 15:54:33 -07:00

meminfo.c

mm, vmalloc: move get_vmalloc_info() to vmalloc.c

2013-04-29 15:54:33 -07:00

namespaces.c

proc_fill_cache(): just make instantiate_t return int

2013-06-29 12:57:18 +04:00

nommu.c

new helper: file_inode(file)

2013-02-22 23:31:31 -05:00

page.c

kpageflags: fix wrong KPF_THP on non-huge compound pages

2012-10-09 16:23:00 +09:00

proc_devtree.c

proc_devtree: Replace include linux/module.h with linux/export.h

2013-05-04 15:31:01 -04:00

proc_net.c

[readdir] convert procfs

2013-06-29 12:56:32 +04:00

proc_sysctl.c

Don't pass inode to ->d_hash() and ->d_compare()

2013-06-29 12:57:36 +04:00

proc_tty.c

proc: use seq_puts()/seq_putc() where possible

2011-01-13 08:03:16 -08:00

root.c

[readdir] convert procfs

2013-06-29 12:56:32 +04:00

self.c

Include missing linux/slab.h inclusions

2013-04-29 15:42:01 -04:00

softirqs.c

proc: use seq_puts()/seq_putc() where possible

2011-01-13 08:03:16 -08:00

stat.c

stat: Use size_t for sizes instead of unsigned

2013-02-01 12:32:08 +02:00

task_mmu.c

fs/proc/task_mmu.c: fix buffer overflow in add_page_map()

2013-08-13 17:57:50 -07:00

task_nommu.c

new helper: file_inode(file)

2013-02-22 23:31:31 -05:00

uptime.c

fs/proc/uptime.c:uptime_proc_show(): use get_monotonic_boottime()

2013-07-03 16:08:02 -07:00

version.c

proc: switch /proc/version to seq_file

2008-10-23 14:19:58 +04:00

vmcore.c

s390/kdump: Disable mmap for s390

2013-07-18 13:40:18 +02:00