Marcelo Henrique Cerri 66bcd449e0 proc: Avoid mixing integer types in mem_rw() ...

[ Upstream commit d238692b4b9f2c36e35af4c6e6f6da36184aeb3e ]

Use size_t when capping the count argument received by mem_rw(). Since
count is size_t, using min_t(int, ...) can lead to a negative value
that will later be passed to access_remote_vm(), which can cause
unexpected behavior.

Since we are capping the value to at maximum PAGE_SIZE, the conversion
from size_t to int when passing it to access_remote_vm() as "len"
shouldn't be a problem.

Link: https://lkml.kernel.org/r/20210512125215.3348316-1-marcelo.cerri@canonical.com
Reviewed-by: David Disseldorp <ddiss@suse.de>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Marcelo Henrique Cerri <marcelo.cerri@canonical.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Souza Cascardo <cascardo@canonical.com>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2021-07-28 11:13:49 +02:00

..

array.c

fs/proc/array.c: allow reporting eip/esp for all coredumping threads

2019-07-03 13:14:44 +02:00

base.c

proc: Avoid mixing integer types in mem_rw()

2021-07-28 11:13:49 +02:00

cmdline.c

…

consoles.c

…

cpuinfo.c

…

devices.c

…

fd.c

proc: use "unsigned int" in proc_fill_cache()

2018-06-07 17:34:38 -07:00

fd.h

…

generic.c

proc: fix lookup in /proc/net subdirectories after setns(2)

2021-01-12 20:10:17 +01:00

inode.c

proc: Use new_inode not new_inode_pseudo

2020-06-22 09:05:06 +02:00

internal.h

proc: fix lookup in /proc/net subdirectories after setns(2)

2021-01-12 20:10:17 +01:00

interrupts.c

…

Kconfig

proc/kcore: add vmcoreinfo note to /proc/kcore

2018-08-22 10:52:46 -07:00

kcore.c

x86/gart: Exclude GART aperture from kcore

2019-04-20 09:15:59 +02:00

kmsg.c

…

loadavg.c

…

Makefile

…

meminfo.c

/proc/meminfo: add percpu populated pages count

2018-08-22 10:52:45 -07:00

namespaces.c

procfs: switch instantiate_t to d_splice_alias()

2018-05-26 14:20:50 -04:00

nommu.c

…

page.c

fs/proc/page.c: don't access uninitialized memmaps in fs/proc/page.c

2019-10-29 09:19:56 +01:00

proc_net.c

proc: fix lookup in /proc/net subdirectories after setns(2)

2021-01-12 20:10:17 +01:00

proc_sysctl.c

fs/proc/proc_sysctl.c: fix the default values of i_uid/i_gid on /proc/sys inodes.

2019-07-26 09:14:24 +02:00

proc_tty.c

…

root.c

proc: Make inline name size calculation automatic

2018-06-15 00:48:57 -04:00

self.c

proc: don't allow async path resolution of /proc/self components

2020-12-02 08:48:09 +01:00

softirqs.c

…

stat.c

proc: use "unsigned int" in /proc/stat hook

2018-08-22 10:52:46 -07:00

task_mmu.c

mm, thp, proc: report THP eligibility for each vma

2019-12-17 20:35:45 +01:00

task_nommu.c

proc: use down_read_killable mmap_sem for /proc/pid/maps

2019-07-31 07:27:09 +02:00

thread_self.c

proc: Use new_inode not new_inode_pseudo

2020-06-22 09:05:06 +02:00

uptime.c

fs/proc/uptime.c: use ktime_get_boottime_ts64

2018-08-22 10:52:45 -07:00

util.c

…

version.c

…

vmcore.c

vmalloc: fix remap_vmalloc_range() bounds checks

2020-04-29 16:31:27 +02:00