* Re: [PATCH 8/8] ring-buffer: Validate boot range memory events
[not found] <20240306020006.586558735@goodmis.org>
@ 2024-03-08 15:39 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2024-03-08 15:39 UTC (permalink / raw)
To: Steven Rostedt, linux-kernel, linux-trace-kernel
Cc: oe-kbuild-all, Masami Hiramatsu, Mark Rutland, Mathieu Desnoyers,
Andrew Morton, Linux Memory Management List, Vincent Donnefort,
Joel Fernandes, Daniel Bristot de Oliveira, Ingo Molnar,
Peter Zijlstra, suleiman, Thomas Gleixner, Vineeth Pillai,
Youssef Esmat, Beau Belgrave, Alexander Graf, Baoquan He,
Borislav Petkov, Paul E. McKenney, David Howells
Hi Steven,
kernel test robot noticed the following build errors:
[auto build test ERROR on next-20240305]
[cannot apply to tip/x86/core akpm-mm/mm-everything linus/master v6.8-rc7 v6.8-rc6 v6.8-rc5 v6.8-rc7]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Steven-Rostedt/ring-buffer-Allow-mapped-field-to-be-set-without-mapping/20240306-100047
base: next-20240305
patch link: https://lore.kernel.org/r/20240306020006.586558735%40goodmis.org
patch subject: [PATCH 8/8] ring-buffer: Validate boot range memory events
config: microblaze-allmodconfig (https://download.01.org/0day-ci/archive/20240308/202403082327.SiOUrqxy-lkp@intel.com/config)
compiler: microblaze-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240308/202403082327.SiOUrqxy-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403082327.SiOUrqxy-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
kernel/trace/ring_buffer.c: In function 'rb_read_data_buffer':
>> kernel/trace/ring_buffer.c:1629:29: error: 'cpu_buffer' undeclared (first use in this function)
1629 | atomic_inc(&cpu_buffer->record_disabled); \
| ^~~~~~~~~~
kernel/trace/ring_buffer.c:1667:33: note: in expansion of macro 'buffer_warn_return'
1667 | buffer_warn_return("[CPU: %d]ABSOLUTE TIME WENT BACKWARDS: last ts: %lld absolute ts: %lld\n",
| ^~~~~~~~~~~~~~~~~~
kernel/trace/ring_buffer.c:1629:29: note: each undeclared identifier is reported only once for each function it appears in
1629 | atomic_inc(&cpu_buffer->record_disabled); \
| ^~~~~~~~~~
kernel/trace/ring_buffer.c:1667:33: note: in expansion of macro 'buffer_warn_return'
1667 | buffer_warn_return("[CPU: %d]ABSOLUTE TIME WENT BACKWARDS: last ts: %lld absolute ts: %lld\n",
| ^~~~~~~~~~~~~~~~~~
>> kernel/trace/ring_buffer.c:1631:17: error: implicit declaration of function 'dump_buffer_page'; did you mean 'free_buffer_page'? [-Werror=implicit-function-declaration]
1631 | dump_buffer_page(bpage, info, tail); \
| ^~~~~~~~~~~~~~~~
kernel/trace/ring_buffer.c:1667:33: note: in expansion of macro 'buffer_warn_return'
1667 | buffer_warn_return("[CPU: %d]ABSOLUTE TIME WENT BACKWARDS: last ts: %lld absolute ts: %lld\n",
| ^~~~~~~~~~~~~~~~~~
>> kernel/trace/ring_buffer.c:1631:34: error: 'bpage' undeclared (first use in this function); did you mean 'dpage'?
1631 | dump_buffer_page(bpage, info, tail); \
| ^~~~~
kernel/trace/ring_buffer.c:1667:33: note: in expansion of macro 'buffer_warn_return'
1667 | buffer_warn_return("[CPU: %d]ABSOLUTE TIME WENT BACKWARDS: last ts: %lld absolute ts: %lld\n",
| ^~~~~~~~~~~~~~~~~~
>> kernel/trace/ring_buffer.c:1631:41: error: 'info' undeclared (first use in this function)
1631 | dump_buffer_page(bpage, info, tail); \
| ^~~~
kernel/trace/ring_buffer.c:1667:33: note: in expansion of macro 'buffer_warn_return'
1667 | buffer_warn_return("[CPU: %d]ABSOLUTE TIME WENT BACKWARDS: last ts: %lld absolute ts: %lld\n",
| ^~~~~~~~~~~~~~~~~~
>> kernel/trace/ring_buffer.c:1636:25: warning: 'return' with no value, in function returning non-void [-Wreturn-type]
1636 | return; \
| ^~~~~~
kernel/trace/ring_buffer.c:1667:33: note: in expansion of macro 'buffer_warn_return'
1667 | buffer_warn_return("[CPU: %d]ABSOLUTE TIME WENT BACKWARDS: last ts: %lld absolute ts: %lld\n",
| ^~~~~~~~~~~~~~~~~~
kernel/trace/ring_buffer.c:1642:12: note: declared here
1642 | static int rb_read_data_buffer(struct buffer_data_page *dpage, int tail, int cpu,
| ^~~~~~~~~~~~~~~~~~~
>> kernel/trace/ring_buffer.c:1667:33: error: label 'out' used but not defined
1667 | buffer_warn_return("[CPU: %d]ABSOLUTE TIME WENT BACKWARDS: last ts: %lld absolute ts: %lld\n",
| ^~~~~~~~~~~~~~~~~~
kernel/trace/ring_buffer.c: In function 'rb_set_commit_to_write':
kernel/trace/ring_buffer.c:3588:45: warning: assignment to 'long unsigned int' from 'struct buffer_data_page *' makes integer from pointer without a cast [-Wint-conversion]
3588 | meta->commit_buffer = cpu_buffer->commit_page->page;
| ^
kernel/trace/ring_buffer.c: At top level:
>> kernel/trace/ring_buffer.c:3957:13: warning: conflicting types for 'dump_buffer_page'; have 'void(struct buffer_data_page *, struct rb_event_info *, long unsigned int)'
3957 | static void dump_buffer_page(struct buffer_data_page *bpage,
| ^~~~~~~~~~~~~~~~
>> kernel/trace/ring_buffer.c:3957:13: error: static declaration of 'dump_buffer_page' follows non-static declaration
kernel/trace/ring_buffer.c:1631:17: note: previous implicit declaration of 'dump_buffer_page' with type 'void(struct buffer_data_page *, struct rb_event_info *, long unsigned int)'
1631 | dump_buffer_page(bpage, info, tail); \
| ^~~~~~~~~~~~~~~~
kernel/trace/ring_buffer.c:1667:33: note: in expansion of macro 'buffer_warn_return'
1667 | buffer_warn_return("[CPU: %d]ABSOLUTE TIME WENT BACKWARDS: last ts: %lld absolute ts: %lld\n",
| ^~~~~~~~~~~~~~~~~~
kernel/trace/ring_buffer.c: In function 'check_buffer':
>> kernel/trace/ring_buffer.c:4046:9: error: 'ret' undeclared (first use in this function); did you mean 'net'?
4046 | ret = rb_read_data_buffer(bpage, tail, &ts, cpu_buffer->cpu, true);
| ^~~
| net
>> kernel/trace/ring_buffer.c:4046:48: warning: passing argument 3 of 'rb_read_data_buffer' makes integer from pointer without a cast [-Wint-conversion]
4046 | ret = rb_read_data_buffer(bpage, tail, &ts, cpu_buffer->cpu, true);
| ^~~
| |
| u64 * {aka long long unsigned int *}
kernel/trace/ring_buffer.c:1642:78: note: expected 'int' but argument is of type 'u64 *' {aka 'long long unsigned int *'}
1642 | static int rb_read_data_buffer(struct buffer_data_page *dpage, int tail, int cpu,
| ~~~~^~~
>> kernel/trace/ring_buffer.c:4046:63: warning: passing argument 4 of 'rb_read_data_buffer' makes pointer from integer without a cast [-Wint-conversion]
4046 | ret = rb_read_data_buffer(bpage, tail, &ts, cpu_buffer->cpu, true);
| ~~~~~~~~~~^~~~~
| |
| int
kernel/trace/ring_buffer.c:1643:52: note: expected 'long long unsigned int *' but argument is of type 'int'
1643 | unsigned long long *timestamp, bool warn)
| ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
>> kernel/trace/ring_buffer.c:4020:13: warning: unused variable 'e' [-Wunused-variable]
4020 | int e;
| ^
>> kernel/trace/ring_buffer.c:4018:17: warning: unused variable 'delta' [-Wunused-variable]
4018 | u64 ts, delta;
| ^~~~~
>> kernel/trace/ring_buffer.c:4016:35: warning: unused variable 'event' [-Wunused-variable]
4016 | struct ring_buffer_event *event;
| ^~~~~
cc1: some warnings being treated as errors
vim +/cpu_buffer +1629 kernel/trace/ring_buffer.c
1621
1622 #define buffer_warn_return(fmt, ...) \
1623 do { \
1624 /* If another report is happening, ignore this one */ \
1625 if (atomic_inc_return(&ts_dump) != 1) { \
1626 atomic_dec(&ts_dump); \
1627 goto out; \
1628 } \
> 1629 atomic_inc(&cpu_buffer->record_disabled); \
1630 pr_warn(fmt, ##__VA_ARGS__); \
> 1631 dump_buffer_page(bpage, info, tail); \
1632 atomic_dec(&ts_dump); \
1633 /* There's some cases in boot up that this can happen */ \
1634 if (WARN_ON_ONCE(system_state != SYSTEM_BOOTING)) \
1635 /* Do not re-enable checking */ \
> 1636 return; \
1637 } while (0)
1638 #else
1639 #define buffer_warn_return(fmt, ...) do { } while (0)
1640 #endif
1641
1642 static int rb_read_data_buffer(struct buffer_data_page *dpage, int tail, int cpu,
> 1643 unsigned long long *timestamp, bool warn)
1644 {
1645 struct ring_buffer_event *event;
1646 u64 ts, delta;
1647 int events = 0;
1648 int e;
1649
1650 ts = dpage->time_stamp;
1651
1652 for (e = 0; e < tail; e += rb_event_length(event)) {
1653
1654 event = (struct ring_buffer_event *)(dpage->data + e);
1655
1656 switch (event->type_len) {
1657
1658 case RINGBUF_TYPE_TIME_EXTEND:
1659 delta = rb_event_time_stamp(event);
1660 ts += delta;
1661 break;
1662
1663 case RINGBUF_TYPE_TIME_STAMP:
1664 delta = rb_event_time_stamp(event);
1665 delta = rb_fix_abs_ts(delta, ts);
1666 if (warn && delta < ts) {
> 1667 buffer_warn_return("[CPU: %d]ABSOLUTE TIME WENT BACKWARDS: last ts: %lld absolute ts: %lld\n",
1668 cpu, ts, delta);
1669 }
1670 ts = delta;
1671 break;
1672
1673 case RINGBUF_TYPE_PADDING:
1674 if (event->time_delta == 1)
1675 break;
1676 fallthrough;
1677 case RINGBUF_TYPE_DATA:
1678 events++;
1679 ts += event->time_delta;
1680 break;
1681
1682 default:
1683 return -1;
1684 }
1685 }
1686 *timestamp = ts;
1687 return events;
1688 }
1689
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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