Kees Cook ec7c20d417 Revert "proc/wchan: use printk format instead of lookup_symbol_name()" ...

commit 54354c6a9f upstream.

This reverts commit 152c432b12.

When a kernel address couldn't be symbolized for /proc/$pid/wchan, it
would leak the raw value, a potential information exposure. This is a
regression compared to the safer pre-v5.12 behavior.

Reported-by: kernel test robot <oliver.sang@intel.com>
Reported-by: Vito Caputo <vcaputo@pengaru.com>
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20211008111626.090829198@infradead.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2021-11-12 15:05:48 +01:00

..

array.c

proc: stop using seq_get_buf in proc_task_name

2021-09-08 11:50:25 -07:00

base.c

Revert "proc/wchan: use printk format instead of lookup_symbol_name()"

2021-11-12 15:05:48 +01:00

bootconfig.c

bootconfig: Change array value to use child node

2021-06-10 13:38:25 -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

procfs/dmabuf: add inode number to /proc/*/fdinfo

2021-07-01 11:06:04 -07:00

fd.h

fs: make helpers idmap mount aware

2021-01-24 14:27:20 +01:00

generic.c

proc: save LOC in __xlate_proc_name()

2021-05-06 19:24:11 -07:00

inode.c

proc: delete redundant subset=pid check

2021-05-06 19:24:11 -07:00

internal.h

fs: make helpers idmap mount aware

2021-01-24 14:27:20 +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

fs/proc/kcore: use page_offline_(freeze|thaw)

2021-06-30 20:47:28 -07:00

kmsg.c

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

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

loadavg.c

sched: Make nr_running() return 32-bit value

2021-05-12 21:34:14 +02:00

Makefile

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

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

meminfo.c

mm: memcontrol: convert NR_FILE_PMDMAPPED account to pages

2021-02-24 13:38:29 -08:00

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

fs: make helpers idmap mount aware

2021-01-24 14:27:20 +01:00

proc_sysctl.c

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

2021-07-03 11:41:14 -07:00

proc_tty.c

tty: replace ->proc_fops with ->proc_show

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

root.c

fs: make helpers idmap mount aware

2021-01-24 14:27:20 +01:00

self.c

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

2021-02-23 20:32:11 -07:00

softirqs.c

proc: introduce proc_create_single{,_data}

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

stat.c

sched: Make nr_iowait() return 32-bit value

2021-05-12 21:34:15 +02:00

task_mmu.c

mm: remove VM_DENYWRITE

2021-09-03 18:42:01 +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

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

2021-02-23 20:32:11 -07:00

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

vmalloc: remove redundant NULL check

2021-02-24 13:38:30 -08:00