Unverified Commit 6952a4f6 authored by Christian Brauner's avatar Christian Brauner
Browse files

selftests: add pid namespace ENOMEM regression test 



We recently regressed (cf. [1] and its corresponding fix in [2]) returning
ENOMEM when trying to create a process in a pid namespace whose init
process/child subreaper has already died. This has caused confusion at
least once before that (cf. [3]). Let's add a simple regression test to
catch this in the future.

[1]: 49cb2fc4 ("fork: extend clone3() to support setting a PID")
[2]: b26ebfe1 ("pid: Fix error return value in some cases")
[3]: 35f71bc0 ("fork: report pid reservation failure properly")
Cc: Corey Minyard <cminyard@mvista.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Adrian Reber <areber@redhat.com>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Andrei Vagin <avagin@gmail.com>
Signed-off-by: default avatarChristian Brauner <christian.brauner@ubuntu.com>
parent 2c523b34

MAINTAINERS

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@@ -13158,6 +13158,7 @@ S: Maintained 
T:	git git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git

T:	git git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git

F:	samples/pidfd/

F:	samples/pidfd/

F:	tools/testing/selftests/pidfd/

F:	tools/testing/selftests/pidfd/

F:	tools/testing/selftests/pid_namespace/

F:	tools/testing/selftests/clone3/

F:	tools/testing/selftests/clone3/

K:	(?i)pidfd

K:	(?i)pidfd

K:	(?i)clone3

K:	(?i)clone3

tools/testing/selftests/Makefile

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@@ -38,6 +38,7 @@ TARGETS += netfilter 
TARGETS += networking/timestamping

TARGETS += networking/timestamping

TARGETS += nsfs

TARGETS += nsfs

TARGETS += pidfd

TARGETS += pidfd

TARGETS += pid_namespace

TARGETS += powerpc

TARGETS += powerpc

TARGETS += proc

TARGETS += proc

TARGETS += pstore

TARGETS += pstore

tools/testing/selftests/pid_namespace/.gitignore

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regression_enomem

tools/testing/selftests/pid_namespace/Makefile

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# SPDX-License-Identifier: GPL-2.0

CFLAGS += -g -I../../../../usr/include/



TEST_GEN_PROGS := regression_enomem



include ../lib.mk



$(OUTPUT)/regression_enomem: regression_enomem.c ../pidfd/pidfd.h

tools/testing/selftests/pid_namespace/config

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CONFIG_PID_NS=y

CONFIG_USER_NS=y

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