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linux/tools/testing
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Steven Rostedt 1d325fed24 ktest.pl: Prevent recursion of default variable options 
[ Upstream commit 61f7e318e9 ]

If a default variable contains itself, do not recurse on it.

For example:

  ADD_CONFIG := ${CONFIG_DIR}/temp_config
  DEFAULTS
  ADD_CONFIG = ${CONFIG_DIR}/default_config ${ADD_CONFIG}

The above works because the temp variable ADD_CONFIG (is a temp because it
is created with ":=") is already defined, it will be substituted in the
variable option. But if it gets commented out:

  # ADD_CONFIG := ${CONFIG_DIR}/temp_config
  DEFAULTS
  ADD_CONFIG = ${CONFIG_DIR}/default_config ${ADD_CONFIG}

Then the above will go into a recursive loop where ${ADD_CONFIG} will
get replaced with the current definition of ADD_CONFIG which contains the
${ADD_CONFIG} and that will also try to get converted. ktest.pl will error
after 100 attempts of recursion and fail.

When replacing a variable with the default variable, if the default
variable contains itself, do not replace it.

Cc: "John Warthog9 Hawley" <warthog9@kernel.org>
Cc: Dhaval Giani <dhaval.giani@gmail.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/20250718202053.732189428@kernel.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-08-20 18:30:29 +02:00
..
crypto/chacha20-s390 tools/testing/crypto: Use vzalloc instead of vmalloc+memset 2022-07-05 14:46:36 +02:00
cxl cxl/test: Improve init-order fidelity relative to real-world systems 2024-10-25 16:07:04 -05:00
fault-injection failcmd: make failcmd.sh executable 2024-09-01 20:43:32 -07:00
ktest ktest.pl: Prevent recursion of default variable options 2025-08-20 18:30:29 +02:00
kunit kunit: qemu_configs: Disable faulting tests on 32-bit SPARC 2025-07-10 16:04:55 +02:00
memblock memblock: updates for 6.12-rc1 2024-09-25 11:35:19 -07:00
nvdimm testing: nvdimm: Add MODULE_DESCRIPTION() macros 2024-06-17 18:43:08 -05:00
radix-tree maple_tree: add regression test for spanning store bug 2024-10-17 08:35:10 -07:00
scatterlist tools/testing/scatterlist: add missing defines 2022-01-30 09:56:58 +02:00
selftests selftests: netfilter: Enable CONFIG_INET_SCTP_DIAG 2025-08-20 18:30:28 +02:00
shared test suite: use %zu to print size_t 2025-04-25 10:47:43 +02:00
vma mm/hugetlb: unshare page tables during VMA split, not before 2025-06-27 11:11:40 +01:00
vsock vsock/test: Fix occasional failure in SIOCOUTQ tests 2025-05-22 14:29:41 +02:00