linux-stable.git/tools/testing/selftests/prctl, branch master

selftests/prctl: fix non-anonymous VMA mapping in set-anon-vma-name test

2026-08-13T22:42:07+00:00

The test creates a non-anonymous VMA (ptr_not_anon) via mmap() with
MAP_PRIVATE but without MAP_ANONYMOUS, using fd=0 (stdin) as the file
descriptor.  This always fails because fd=0 is not a regular file, and the
failure was hidden because ASSERT_NE() incorrectly checked for NULL
instead of MAP_FAILED.

Fix by using mkstemp() + ftruncate() to create a real temporary file, then
mapping it with MAP_PRIVATE to obtain a genuine file-backed VMA.  Also fix
the mmap() error checks to use MAP_FAILED instead of NULL, and pass fd=-1
for the anonymous mapping for clarity.  The temp file is unlinked
immediately so it does not persist on disk.

Link: https://lore.kernel.org/20260803103046.14324-1-hongfu.li@linux.dev
Signed-off-by: Hongfu Li 
Cc: Shuah Khan 
Cc: Wei Yang 
Signed-off-by: Andrew Morton

selftests: fix ARCH normalization to handle command-line argument

2026-03-28T04:19:44+00:00

Several selftests Makefiles (e.g.  prctl, breakpoints, etc) attempt to
normalize the ARCH variable by converting x86_64 and i.86 to x86. 
However, it uses the conditional assignment operator '?='.

When ARCH is passed as a command-line argument (e.g., during an rpmbuild
process), the '?=' operator ignores the shell command and the sed
transformation.  This leads to an incorrect ARCH value being used, which
causes build failures

  # make -C tools/testing/selftests TARGETS=prctl ARCH=x86_64
  make: Entering directory '/build/tools/testing/selftests'
  make[1]: Entering directory '/build/tools/testing/selftests/prctl'
  make[1]: *** No targets.  Stop.
  make[1]: Leaving directory '/build/tools/testing/selftests/prctl'
  make: *** [Makefile:197: all] Error 2

Change the assignment to use 'override' and ':=' to ensure the
normalization logic is applied regardless of how the ARCH variable was
initially defined.

Link: https://lkml.kernel.org/r/20260309205145.572778-1-aleksey.oladko@virtuozzo.com
Signed-off-by: Aleksei Oladko 
Cc: Shuah Khan 
Cc: Wei Yang 
Cc: Bala-Vignesh-Reddy 
Cc: Chelsy Ratnawat 
Signed-off-by: Andrew Morton

selftests: complete kselftest include centralization

2025-11-27T22:24:31+00:00

This follow-up patch completes centralization of kselftest.h and
ksefltest_harness.h includes in remaining seltests files, replacing all
relative paths with a non-relative paths using shared -I include path in
lib.mk

Tested with gcc-13.3 and clang-18.1, and cross-compiled successfully on
riscv, arm64, x86_64 and powerpc arch.

[reddybalavignesh9979@gmail.com: add selftests include path for kselftest.h]
  Link: https://lkml.kernel.org/r/20251017090201.317521-1-reddybalavignesh9979@gmail.com
Link: https://lkml.kernel.org/r/20251016104409.68985-1-reddybalavignesh9979@gmail.com
Signed-off-by: Bala-Vignesh-Reddy 
Suggested-by: Andrew Morton 
Link: https://lore.kernel.org/lkml/20250820143954.33d95635e504e94df01930d0@linux-foundation.org/
Reviewed-by: Wei Yang 
Cc: David Hildenbrand 
Cc: David S. Miller 
Cc: Eric Dumazet 
Cc: Günther Noack 
Cc: Jakub Kacinski 
Cc: Liam Howlett 
Cc: Lorenzo Stoakes 
Cc: Michal Hocko 
Cc: Mickael Salaun 
Cc: Ming Lei 
Cc: Paolo Abeni 
Cc: Shuah Khan 
Cc: Simon Horman 
Cc: Suren Baghdasaryan 
Cc: Vlastimil Babka 
Signed-off-by: Andrew Morton

selftests: prctl: Add prctl test for PR_GET_NAME

2023-11-30T23:30:05+00:00

This patch covers the testing of PR_GET_NAME by
reading it's value from proc/self/task/pid/comm
and matching it with the value returned by PR_GET_NAME.
If the values are matched then it's successful, otherwise
it fails.

changes since v1:
	- Handled fscanf,fopen error checking.
	- Defined MAX_PATH_LEN.

Signed-off-by: Osama Muhammad 
Signed-off-by: Shuah Khan

selftests:prctl: add set-process-name to .gitignore

2023-07-25T16:33:25+00:00

Add newly addded set-process-name test to .gitignore

Signed-off-by: Shuah Khan

selftests:prctl: Fix make clean override warning

2023-07-25T16:33:14+00:00

Remove clean target in Makefile to fix the following warning
and use the one in common lib.mk

Makefile:14: warning: overriding recipe for target 'clean'
../lib.mk:160: warning: ignoring old recipe for target 'clean'

Signed-off-by: Shuah Khan

selftests: prctl: Add new prctl test for PR_SET_NAME

2023-07-24T15:00:42+00:00

This patch will add the new test, which covers the prctl call
PR_SET_NAME command. The test tries to give a name using the PR_SET_NAME
call and then confirm it that it changed correctly by using  PR_GET_NAME.
It also tries to rename it with empty name.In the test PR_GET_NAME is
tested by passing null pointer to it and check its behaviour.

Signed-off-by: Osama Muhammad 
Reviewed-by: Muhammad Usama Anjum 
Tested-by: Muhammad Usama Anjum 
Signed-off-by: Shuah Khan

selftests: prctl: Fix spelling mistake "anonynous" -> "anonymous"

2023-06-12T22:39:10+00:00

There is a spelling mistake in an log message. Fix it.

Signed-off-by: Colin Ian King 
Signed-off-by: Shuah Khan

selftests: prctl: Add new prctl test for PR_SET_VMA action

2023-03-28T16:28:33+00:00

This patch will add the new test, which covers the prctl call with
PR_SET_VMA command. The test tries to give a name to the anonymous
VMA within the process memory map, and then checks the result of
the operation by parsing 'maps' virtual file.

Additionally, the test tries to call the prctl PR_SET_VMA command
with invalid arguments, and checks the error codes for correctness.

At the moment anonymous VMA naming through prctl call functionality
is not covered with any tests, so I think implementing it makes sense.

In version 2 of this patch I consider the selftest Makefile rule about
TARGETS entries order - I moved the 'prctl' entry in the Makefile to
follow the lexicographic order. In version 1 it was placed at the
end of the list.

Signed-off-by: Ivan Orlov 
Signed-off-by: Shuah Khan

selftests: Fix spelling mistake "allright" -> "all right"

2023-02-13T16:09:46+00:00

There are two spelling mistakes in the test messages. Fix them.

Signed-off-by: Colin Ian King 
Signed-off-by: Shuah Khan