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Message-ID: <202201090343.IKIQqdk4-lkp@intel.com>
Date: Sun, 9 Jan 2022 03:04:51 +0800
From: kernel test robot <lkp@...el.com>
To: Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org
Cc: kbuild-all@...ts.01.org, Ingo Molnar <mingo@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Memory Management List <linux-mm@...ck.org>,
Masami Hiramatsu <mhiramat@...nel.org>,
Tom Zanussi <zanussi@...nel.org>, stable@...r.kernel.org,
Pingfan Liu <kernelfans@...il.com>
Subject: Re: [PATCH 2/2] tracing: Add test for user space strings when
filtering on string pointers
Hi Steven,
I love your patch! Perhaps something to improve:
[auto build test WARNING on rostedt-trace/for-next]
[also build test WARNING on linux/master linus/master hnaz-mm/master v5.16-rc8 next-20220107]
[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]
url: https://github.com/0day-ci/linux/commits/Steven-Rostedt/tracing-Fix-filtering-on-string-pointers/20220108-070047
base: https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git for-next
config: openrisc-randconfig-s031-20220107 (https://download.01.org/0day-ci/archive/20220109/202201090343.IKIQqdk4-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 11.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://github.com/0day-ci/linux/commit/19b8c1c0fee0d7bff07ed0d5862a29ac2bb4adc9
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Steven-Rostedt/tracing-Fix-filtering-on-string-pointers/20220108-070047
git checkout 19b8c1c0fee0d7bff07ed0d5862a29ac2bb4adc9
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=openrisc SHELL=/bin/bash kernel/trace/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
>> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@
kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr
kernel/trace/trace_events_filter.c:685:22: sparse: got char *str
>> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@
kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr
kernel/trace/trace_events_filter.c:685:22: sparse: got char *str
>> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@
kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr
kernel/trace/trace_events_filter.c:685:22: sparse: got char *str
>> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@
kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr
kernel/trace/trace_events_filter.c:685:22: sparse: got char *str
>> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@
kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr
kernel/trace/trace_events_filter.c:685:22: sparse: got char *str
>> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@
kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr
kernel/trace/trace_events_filter.c:685:22: sparse: got char *str
>> kernel/trace/trace_events_filter.c:685:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __user *ustr @@ got char *str @@
kernel/trace/trace_events_filter.c:685:22: sparse: expected char [noderef] __user *ustr
kernel/trace/trace_events_filter.c:685:22: sparse: got char *str
kernel/trace/trace_events_filter.c:1066:20: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected struct event_filter * @@ got struct event_filter [noderef] __rcu *filter @@
kernel/trace/trace_events_filter.c:1066:20: sparse: expected struct event_filter *
kernel/trace/trace_events_filter.c:1066:20: sparse: got struct event_filter [noderef] __rcu *filter
kernel/trace/trace_events_filter.c:1136:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct event_filter *filter @@ got struct event_filter [noderef] __rcu *filter @@
kernel/trace/trace_events_filter.c:1136:34: sparse: expected struct event_filter *filter
kernel/trace/trace_events_filter.c:1136:34: sparse: got struct event_filter [noderef] __rcu *filter
kernel/trace/trace_events_filter.c:1153:27: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct event_filter *filter @@ got struct event_filter [noderef] __rcu *filter @@
kernel/trace/trace_events_filter.c:1153:27: sparse: expected struct event_filter *filter
kernel/trace/trace_events_filter.c:1153:27: sparse: got struct event_filter [noderef] __rcu *filter
kernel/trace/trace_events_filter.c:1066:20: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected struct event_filter * @@ got struct event_filter [noderef] __rcu *filter @@
kernel/trace/trace_events_filter.c:1066:20: sparse: expected struct event_filter *
kernel/trace/trace_events_filter.c:1066:20: sparse: got struct event_filter [noderef] __rcu *filter
kernel/trace/trace_events_filter.c:1066:20: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected struct event_filter * @@ got struct event_filter [noderef] __rcu *filter @@
kernel/trace/trace_events_filter.c:1066:20: sparse: expected struct event_filter *
kernel/trace/trace_events_filter.c:1066:20: sparse: got struct event_filter [noderef] __rcu *filter
kernel/trace/trace_events_filter.c:1066:20: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected struct event_filter * @@ got struct event_filter [noderef] __rcu *filter @@
kernel/trace/trace_events_filter.c:1066:20: sparse: expected struct event_filter *
kernel/trace/trace_events_filter.c:1066:20: sparse: got struct event_filter [noderef] __rcu *filter
vim +685 kernel/trace/trace_events_filter.c
666
667 static __always_inline char *test_string(char *str)
668 {
669 struct ustring_buffer *ubuf;
670 char __user *ustr;
671 char *kstr;
672
673 if (!ustring_per_cpu)
674 return NULL;
675
676 ubuf = this_cpu_ptr(ustring_per_cpu);
677 kstr = ubuf->buffer;
678
679 if (likely((unsigned long)str >= TASK_SIZE)) {
680 /* For safety, do not trust the string pointer */
681 if (!strncpy_from_kernel_nofault(kstr, str, USTRING_BUF_SIZE))
682 return NULL;
683 } else {
684 /* user space address? */
> 685 ustr = str;
686 if (!strncpy_from_user_nofault(kstr, ustr, USTRING_BUF_SIZE))
687 return NULL;
688 }
689 return kstr;
690 }
691
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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