Marcelo Henrique Cerri fc6ac92cfc 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 14:35:42 +02:00

..

array.c

seccomp: Fix CONFIG tests for Seccomp_filters

2021-05-14 09:50:24 +02:00

base.c

proc: Avoid mixing integer types in mem_rw()

2021-07-28 14:35:42 +02:00

bootconfig.c

proc/bootconfig: Fix to use correct quotes for value

2020-06-16 21:21:03 -04:00

cmdline.c

proc: introduce proc_create_single{,_data}

2018-05-16 07:23:35 +02:00

consoles.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 191

2019-05-30 11:29:21 -07:00

cpuinfo.c

proc/cpuinfo: switch to ->read_iter

2020-11-06 10:05:18 -08:00

devices.c

block: move block-related definitions out of fs.h

2020-06-24 09:16:02 -06:00

fd.c

proc: use "unsigned int" in proc_fill_cache()

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

fd.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

generic.c

fs/proc/generic.c: fix incorrect pde_is_permanent check

2021-05-19 10:13:09 +02:00

inode.c

proc: wire up generic_file_splice_read for iter ops

2020-11-06 10:05:18 -08:00

internal.h

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

2020-12-30 11:53:56 +01:00

interrupts.c

proc: introduce proc_create_seq{,_data}

2018-05-16 07:23:35 +02:00

Kconfig

treewide: replace '---help---' in Kconfig files with 'help'

2020-06-14 01:57:21 +09:00

kcore.c

maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault

2020-06-17 10:57:41 -07:00

kmsg.c

proc: faster open/read/close with "permanent" files

2020-04-07 10:43:42 -07:00

loadavg.c

sched: loadavg: consolidate LOAD_INT, LOAD_FRAC, CALC_LOAD

2018-10-26 16:26:32 -07:00

Makefile

proc: bootconfig: Add /proc/bootconfig to show boot config list

2020-01-13 13:19:39 -05:00

meminfo.c

proc/meminfo: avoid open coded reading of vm_committed_as

2020-08-07 11:33:26 -07:00

namespaces.c

Merge branch 'work.openat2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2020-01-29 11:20:24 -08:00

nommu.c

mm: don't include asm/pgtable.h if linux/mm.h is already included

2020-06-09 09:39:13 -07:00

page.c

mm: Add PG_arch_2 page flag

2020-09-04 12:46:06 +01:00

proc_net.c

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

2020-12-30 11:53:56 +01:00

proc_sysctl.c

proc: use kvzalloc for our kernel buffer

2021-03-04 11:38:21 +01:00

proc_tty.c

tty: replace ->proc_fops with ->proc_show

2018-05-16 07:24:30 +02:00

root.c

proc: s_fs_info may be NULL when proc_kill_sb is called

2020-06-10 14:54:54 -05:00

self.c

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

2021-03-04 11:38:42 +01:00

softirqs.c

proc: introduce proc_create_single{,_data}

2018-05-16 07:23:35 +02:00

stat.c

proc/stat: switch to ->read_iter

2020-11-06 10:05:18 -08:00

task_mmu.c

mm/huge_memory.c: add missing read-only THP checking in transparent_hugepage_enabled()

2021-07-14 16:56:50 +02:00

task_nommu.c

mmap locking API: use coccinelle to convert mmap_sem rwsem call sites

2020-06-09 09:39:14 -07:00

thread_self.c

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

2021-03-04 11:38:42 +01:00

uptime.c

fs/proc: Respect boottime inside time namespace for /proc/uptime

2020-01-14 12:20:56 +01:00

util.c

fs/proc/util.c: include fs/proc/internal.h for name_to_int()

2019-01-04 13:13:45 -08:00

version.c

proc: introduce proc_create_single{,_data}

2018-05-16 07:23:35 +02:00

vmcore.c

mm: don't include asm/pgtable.h if linux/mm.h is already included

2020-06-09 09:39:13 -07:00