mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity
linux-stable/fs/proc
History
Aleksa Sarai 7e388d0f9c procfs: block chmod on /proc/thread-self/comm 
commit ccf61486fe upstream.

Due to an oversight in commit 1b3044e39a ("procfs: fix pthread
cross-thread naming if !PR_DUMPABLE") in switching from REG to NOD,
chmod operations on /proc/thread-self/comm were no longer blocked as
they are on almost all other procfs files.

A very similar situation with /proc/self/environ was used to as a root
exploit a long time ago, but procfs has SB_I_NOEXEC so this is simply a
correctness issue.

Ref: https://lwn.net/Articles/191954/
Ref: 6d76fa58b0 ("Don't allow chmod() on the /proc/<pid>/ files")
Fixes: 1b3044e39a ("procfs: fix pthread cross-thread naming if !PR_DUMPABLE")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Message-Id: <20230713141001.27046-1-cyphar@cyphar.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2023-09-23 10:47:00 +02:00
..
Kconfig
…
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
array.c fs/proc/array.c: allow reporting eip/esp for all coredumping threads 2019-07-03 13:15:59 +02:00
base.c procfs: block chmod on /proc/thread-self/comm 2023-09-23 10:47:00 +02:00
cmdline.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
consoles.c
…
cpuinfo.c x86 / CPU: Always show current CPU frequency in /proc/cpuinfo 2018-01-10 09:31:20 +01:00
devices.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fd.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
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 procfs: use faster rb_first_cached() 2017-09-08 18:26:49 -07:00
inode.c proc: Use new_inode not new_inode_pseudo 2020-06-20 10:25:04 +02:00
internal.h procfs: use faster rb_first_cached() 2017-09-08 18:26:49 -07:00
interrupts.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kcore.c fs/proc/kcore.c: use __pa_symbol() for KCORE_TEXT list entries 2018-09-15 09:45:27 +02:00
kmsg.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
loadavg.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
meminfo.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
namespaces.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nommu.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
page.c fs/proc/page.c: don't access uninitialized memmaps in fs/proc/page.c 2019-10-29 09:17:37 +01:00
proc_net.c procfs: use faster rb_first_cached() 2017-09-08 18:26:49 -07:00
proc_sysctl.c sysctl: add a new register_sysctl_init() interface 2023-02-06 07:46:33 +01:00
proc_tty.c tty fix oops when rmmod 8250 2017-12-20 10:10:34 +01:00
root.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
self.c proc: don't allow async path resolution of /proc/self components 2020-12-02 08:34:41 +01:00
softirqs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
stat.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
task_mmu.c mm: hugetlb: proc: check for hugetlb shared PMD in /proc/PID/smaps 2023-02-22 12:46:03 +01:00
task_nommu.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
thread_self.c proc: Use new_inode not new_inode_pseudo 2020-06-20 10:25:04 +02:00
uptime.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
version.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vmcore.c proc/vmcore: fix clearing user buffer by properly using clear_user() 2021-12-08 08:46:52 +01:00