Jann Horn c674751ea5 proc: Fix broken error paths for namespace links ...

commit 425224c2d7 upstream.

Don't return the return value of down_read_killable() (0) when a ptrace
access check fails, return -EACCES as intended.

Reported-by: Magnus Lindholm <linmag7@gmail.com>
Closes: https://lore.kernel.org/r/20260706170735.2941493-1-linmag7@gmail.com
Fixes: 6650527444 ("proc: protect ptrace_may_access() with exec_update_lock (part 1)")
Cc: stable@vger.kernel.org
Signed-off-by: Jann Horn <jannh@google.com>
Link: https://patch.msgid.link/20260706-procfs-ns-eacces-fix-v1-1-a69ab14c02e6@google.com
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-08-03 11:15:30 +02:00

..

array.c

proc: protect ptrace_may_access() with exec_update_lock (part 1)

2026-07-24 16:03:50 +02:00

base.c

mm: refactor mm_access() to not return NULL

2026-07-29 17:48:29 +02:00

bootconfig.c

…

cmdline.c

…

consoles.c

…

cpuinfo.c

…

devices.c

…

fd.c

proc: protect ptrace_may_access() with exec_update_lock (FD links)

2026-07-24 16:03:49 +02:00

fd.h

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generic.c

proc: only bump parent nlink when registering directories

2026-07-24 16:03:36 +02:00

inode.c

proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al

2025-08-15 12:08:54 +02:00

internal.h

proc: protect ptrace_may_access() with exec_update_lock (FD links)

2026-07-24 16:03:49 +02:00

interrupts.c

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Kconfig

…

kcore.c

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kmsg.c

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loadavg.c

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Makefile

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meminfo.c

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namespaces.c

proc: Fix broken error paths for namespace links

2026-08-03 11:15:30 +02:00

nommu.c

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page.c

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proc_net.c

proc: rename proc_setattr to proc_nochmod_setattr

2026-07-24 16:03:49 +02:00

proc_sysctl.c

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proc_tty.c

…

root.c

…

self.c

…

softirqs.c

…

stat.c

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task_mmu.c

mm: fix the inaccurate memory statistics issue for users

2025-07-17 18:35:14 +02:00

task_nommu.c

…

thread_self.c

…

uptime.c

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util.c

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version.c

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vmcore.c

…