[Bug 2133894] Re: lttng-modules-dkms FTBS in Noble with the linux-6.17 kernel
Massimiliano Pellizzer
2133894 at bugs.launchpad.net
Fri Dec 19 16:33:45 UTC 2025
Questing uploaded, thanks
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https://bugs.launchpad.net/bugs/2133894
Title:
lttng-modules-dkms FTBS in Noble with the linux-6.17 kernel
Status in lttng-modules package in Ubuntu:
Invalid
Status in lttng-modules source package in Noble:
New
Status in lttng-modules source package in Questing:
New
Status in lttng-modules source package in Resolute:
Invalid
Bug description:
[ Impact ]
DKMS make.log for lttng-modules-2.13.11 for kernel 6.17.0-7-generic (x86_64)
Thu Dec 4 18:20:31 UTC 2025
make: Entering directory '/usr/src/linux-headers-6.17.0-7-generic'
make[1]: Entering directory '/var/lib/dkms/lttng-modules/2.13.11/build'
warning: the compiler differs from the one used to build the kernel
The kernel was built by: x86_64-linux-gnu-gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
You are using: gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
CC [M] src/lttng-ring-buffer-client-discard.o
src/probes/Kbuild:27: File /usr/src/linux-headers-6.17.0-7-generic/mm/slab.h not found. Probe "kmem" is disabled. Use full kernel source tree to enable it.
src/probes/Kbuild:81: File /usr/src/linux-headers-6.17.0-7-generic/arch/x86/kvm/lapic.h not found. Probe "kvm" x86-specific is disabled. Use full kernel source tree to enable it.
CC [M] src/tests/probes/lttng-test.o
CC [M] src/lib/ringbuffer/ring_buffer_backend.o
src/probes/Kbuild:188: Files /usr/src/linux-headers-6.17.0-7-generic/fs/btrfs/*.h not found. Probe "btrfs" is disabled. Use full kernel source tree to enable it.
src/probes/Kbuild:207: Files /usr/src/linux-headers-6.17.0-7-generic/mm/internal.h not found. Probe "compaction" is disabled. Use full kernel source tree to enable it.
src/probes/Kbuild:216: Files /usr/src/linux-headers-6.17.0-7-generic/fs/ext4/*.h not found. Probe "ext4" is disabled. Use full kernel source tree to enable it.
src/probes/Kbuild:245: File /usr/src/linux-headers-6.17.0-7-generic/drivers/base/regmap/trace.h not found. Probe "regmap" is disabled. Need Linux 4.1+ kernel source tree to enable it.
CC [M] src/probes/lttng-probe-sched.o
In file included from <command-line>:
/usr/src/linux-headers-6.17.0-7-generic/include/linux/static_call_types.h:15:41: error: ‘__SCT__tp_func_lttng_test_filter_event’ undeclared here (not in a function); did you mean ‘__SCK__tp_func_lttng_test_filter_event’?
15 | #define STATIC_CALL_TRAMP_PREFIX __SCT__
| ^~~~~~~
/usr/src/linux-headers-6.17.0-7-generic/include/linux/compiler_types.h:83:23: note: in definition of macro ‘___PASTE’
83 | #define ___PASTE(a,b) a##b
| ^
/usr/src/linux-headers-6.17.0-7-generic/include/linux/static_call_types.h:18:41: note: in expansion of macro ‘__PASTE’
18 | #define STATIC_CALL_TRAMP(name) __PASTE(STATIC_CALL_TRAMP_PREFIX, name)
| ^~~~~~~
/usr/src/linux-headers-6.17.0-7-generic/include/linux/static_call_types.h:18:49: note: in expansion of macro ‘STATIC_CALL_TRAMP_PREFIX’
18 | #define STATIC_CALL_TRAMP(name) __PASTE(STATIC_CALL_TRAMP_PREFIX, name)
| ^~~~~~~~~~~~~~~~~~~~~~~~
/usr/src/linux-headers-6.17.0-7-generic/include/linux/static_call.h:146:39: note: in expansion of macro ‘STATIC_CALL_TRAMP’
146 | #define STATIC_CALL_TRAMP_ADDR(name) &STATIC_CALL_TRAMP(name)
| ^~~~~~~~~~~~~~~~~
/usr/src/linux-headers-6.17.0-7-generic/include/linux/tracepoint.h:325:38: note: in expansion of macro ‘STATIC_CALL_TRAMP_ADDR’
325 | .static_call_tramp = STATIC_CALL_TRAMP_ADDR(tp_func_##_name), \
| ^~~~~~~~~~~~~~~~~~~~~~
/usr/src/linux-headers-6.17.0-7-generic/include/linux/tracepoint.h:371:9: note: in expansion of macro ‘__DEFINE_TRACE_EXT’
371 | __DEFINE_TRACE_EXT(_name, NULL, PARAMS(_proto), PARAMS(_args));
| ^~~~~~~~~~~~~~~~~~
src/tests/../../include/wrapper/tracepoint.h:19:9: note: in expansion of macro ‘DEFINE_TRACE’
19 | DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
| ^~~~~~~~~~~~
src/tests/probes/lttng-test.c:28:1: note: in expansion of macro ‘LTTNG_DEFINE_TRACE’
28 | LTTNG_DEFINE_TRACE(lttng_test_filter_event,
| ^~~~~~~~~~~~~~~~~~
In file included from src/probes/../../include/lttng/define_trace.h:87,
from src/probes/../../include/instrumentation/events/sched.h:730,
from src/probes/lttng-probe-sched.c:28:
src/probes/../../include/lttng/tracepoint-event-impl.h:133:6: error: conflicting types for ‘trace_sched_process_exit’; have ‘void(struct task_struct *)’
133 | void trace_##_name(_proto);
| ^~~~~~
src/probes/../../include/lttng/tracepoint-event-impl.h:98:9: note: in expansion of macro ‘LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP’
98 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, name, PARAMS(proto), PARAMS(args))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/probes/../../include/instrumentation/events/sched.h:474:1: note: in expansion of macro ‘LTTNG_TRACEPOINT_EVENT_INSTANCE’
474 | LTTNG_TRACEPOINT_EVENT_INSTANCE(sched_process_template, sched_process_exit,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/src/linux-headers-6.17.0-7-generic/include/trace/events/sched.h:10,
from src/probes/lttng-probe-sched.c:17:
/usr/src/linux-headers-6.17.0-7-generic/include/linux/tracepoint.h:278:28: note: previous definition of ‘trace_sched_process_exit’ with type ‘void(struct task_struct *, bool)’ {aka ‘void(struct task_struct *, _Bool)’}
278 | static inline void trace_##name(proto) \
| ^~~~~~
/usr/src/linux-headers-6.17.0-7-generic/include/linux/tracepoint.h:481:9: note: in expansion of macro ‘__DECLARE_TRACE’
481 | __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), \
| ^~~~~~~~~~~~~~~
/usr/src/linux-headers-6.17.0-7-generic/include/linux/tracepoint.h:619:9: note: in expansion of macro ‘DECLARE_TRACE_EVENT’
619 | DECLARE_TRACE_EVENT(name, PARAMS(proto), PARAMS(args))
| ^~~~~~~~~~~~~~~~~~~
/usr/src/linux-headers-6.17.0-7-generic/include/trace/events/sched.h:335:1: note: in expansion of macro ‘TRACE_EVENT’
335 | TRACE_EVENT(sched_process_exit,
| ^~~~~~~~~~~
make[5]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:287: src/tests/probes/lttng-test.o] Error 1
make[4]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:556: src/tests] Error 2
make[4]: *** Waiting for unfinished jobs....
CC [M] src/probes/lttng-probe-irq.o
make[5]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:287: src/probes/lttng-probe-sched.o] Error 1
make[5]: *** Waiting for unfinished jobs....
CC [M] src/lib/ringbuffer/ring_buffer_frontend.o
CC [M] src/lib/ringbuffer/ring_buffer_iterator.o
CC [M] src/lib/ringbuffer/ring_buffer_vfs.o
In file included from src/lib/ringbuffer/ring_buffer_frontend.c:54:
src/lib/ringbuffer/ring_buffer_frontend.c: In function ‘switch_buffer_timer’:
src/lib/../../include/wrapper/timer.h:38:9: error: implicit declaration of function ‘from_timer’; did you mean ‘mod_timer’? [-Werror=implicit-function-declaration]
38 | from_timer(var, callback_timer, timer_fieldname)
| ^~~~~~~~~~
src/lib/ringbuffer/ring_buffer_frontend.c:337:48: note: in expansion of macro ‘lttng_from_timer’
337 | struct lttng_kernel_ring_buffer *buf = lttng_from_timer(buf, t, switch_timer);
| ^~~~~~~~~~~~~~~~
src/lib/ringbuffer/ring_buffer_frontend.c:337:73: error: ‘switch_timer’ undeclared (first use in this function); did you mean ‘switch_mode’?
337 | struct lttng_kernel_ring_buffer *buf = lttng_from_timer(buf, t, switch_timer);
| ^~~~~~~~~~~~
src/lib/../../include/wrapper/timer.h:38:41: note: in definition of macro ‘lttng_from_timer’
38 | from_timer(var, callback_timer, timer_fieldname)
| ^~~~~~~~~~~~~~~
src/lib/ringbuffer/ring_buffer_frontend.c:337:73: note: each undeclared identifier is reported only once for each function it appears in
337 | struct lttng_kernel_ring_buffer *buf = lttng_from_timer(buf, t, switch_timer);
| ^~~~~~~~~~~~
src/lib/../../include/wrapper/timer.h:38:41: note: in definition of macro ‘lttng_from_timer’
38 | from_timer(var, callback_timer, timer_fieldname)
| ^~~~~~~~~~~~~~~
src/lib/ringbuffer/ring_buffer_frontend.c: In function ‘lib_ring_buffer_stop_switch_timer’:
src/lib/ringbuffer/ring_buffer_frontend.c:391:9: error: implicit declaration of function ‘del_timer_sync’ [-Werror=implicit-function-declaration]
391 | del_timer_sync(&buf->switch_timer);
| ^~~~~~~~~~~~~~
src/lib/ringbuffer/ring_buffer_frontend.c: In function ‘read_buffer_timer’:
src/lib/ringbuffer/ring_buffer_frontend.c:400:73: error: ‘read_timer’ undeclared (first use in this function); did you mean ‘vread_iter’?
400 | struct lttng_kernel_ring_buffer *buf = lttng_from_timer(buf, t, read_timer);
| ^~~~~~~~~~
src/lib/../../include/wrapper/timer.h:38:41: note: in definition of macro ‘lttng_from_timer’
38 | from_timer(var, callback_timer, timer_fieldname)
| ^~~~~~~~~~~~~~~
make[4]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:556: src/probes] Error 2
CC [M] src/lib/ringbuffer/ring_buffer_splice.o
src/lib/ringbuffer/ring_buffer_frontend.c: At top level:
src/lib/ringbuffer/ring_buffer_frontend.c:2409:12: warning: no previous prototype for ‘init_lib_ring_buffer_frontend’ [-Wmissing-prototypes]
2409 | int __init init_lib_ring_buffer_frontend(void)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/lib/ringbuffer/ring_buffer_frontend.c:2420:13: warning: no previous prototype for ‘exit_lib_ring_buffer_frontend’ [-Wmissing-prototypes]
2420 | void __exit exit_lib_ring_buffer_frontend(void)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[5]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:287: src/lib/ringbuffer/ring_buffer_frontend.o] Error 1
make[5]: *** Waiting for unfinished jobs....
make[4]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:556: src/lib] Error 2
make[3]: *** [/usr/src/linux-headers-6.17.0-7-generic/scripts/Makefile.build:556: src] Error 2
make[2]: *** [/usr/src/linux-headers-6.17.0-7-generic/Makefile:2016: .] Error 2
make[1]: *** [/usr/src/linux-headers-6.17.0-7-generic/Makefile:248: __sub-make] Error 2
make[1]: Leaving directory '/var/lib/dkms/lttng-modules/2.13.11/build'
make: *** [Makefile:248: __sub-make] Error 2
make: Leaving directory '/usr/src/linux-headers-6.17.0-7-generic'
[ Test case ]
Install the latest linux-6.17 kernel on Noble:
$ sudo add-apt-repository ppa:canonical-kernel-team/ppa3
$ sudo apt install linux-generic-hwe-24.04-edge
Install lttng-modules-dkms:
$ sudo apt install lttng-modules-dkms
Module built and installed successfully.
Load the module:
$ sudo modprobe lttng-test
Module loaded successfully.
The same procedure can be repeated on linux-6.8 to test for possible
regressions.
Install the latest kernel on Questing and Resolute:
Install lttng-modules-dkms:
$ sudo apt install lttng-modules-dkms
Module built and installed successfully.
Load the module:
$ sudo modprobe lttng-test
Module loaded successfully.
The same test must be repeated on Noble linux-6.8 and linux-6.14 kernels.
The same test can be repeated for Questing.
[ Fix ]
Backport upstream patches from lttng-modules
(https://git.lttng.org/?p=lttng-modules.git):
[ Regression potential ]
We may experience regressions in systems that are using the lttng-
modules drivers, especially with kernels >= 6.8 kernel.
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