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SubjectRe: [PATCH v4 3/4] fanotify,audit: Allow audit to use the full permission event response
Hi Richard,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on jack-fs/fsnotify]
[also build test WARNING on pcmoore-audit/next linus/master v5.19 next-20220810]
[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/Richard-Guy-Briggs/fanotify-Allow-user-space-to-pass-back-additional-audit-info/20220810-012825
base: https://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git fsnotify
config: x86_64-randconfig-a016 (https://download.01.org/0day-ci/archive/20220811/202208110406.Lb3ONrcP-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 5f1c7e2cc5a3c07cbc2412e851a7283c1841f520)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/bee8cac0b7796a753948c83b403a152f8c6acb8c
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Richard-Guy-Briggs/fanotify-Allow-user-space-to-pass-back-additional-audit-info/20220810-012825
git checkout bee8cac0b7796a753948c83b403a152f8c6acb8c
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> kernel/auditsc.c:2907:8: warning: variable 'ib' set but not used [-Wunused-but-set-variable]
char *ib = buf;
^
1 warning generated.


vim +/ib +2907 kernel/auditsc.c

2902
2903 void __audit_fanotify(u32 response, size_t len, char *buf)
2904 {
2905 struct fanotify_response_info_audit_rule *friar;
2906 size_t c = len;
> 2907 char *ib = buf;
2908
2909 if (!(len && buf)) {
2910 audit_log(audit_context(), GFP_KERNEL, AUDIT_FANOTIFY,
2911 "resp=%u fan_type=0 fan_info=?", response);
2912 return;
2913 }
2914 while (c >= sizeof(struct fanotify_response_info_header)) {
2915 friar = (struct fanotify_response_info_audit_rule *)buf;
2916 switch (friar->hdr.type) {
2917 case FAN_RESPONSE_INFO_AUDIT_RULE:
2918 if (friar->hdr.len < sizeof(*friar)) {
2919 audit_log(audit_context(), GFP_KERNEL, AUDIT_FANOTIFY,
2920 "resp=%u fan_type=%u fan_info=(incomplete)",
2921 response, friar->hdr.type);
2922 return;
2923 }
2924 audit_log(audit_context(), GFP_KERNEL, AUDIT_FANOTIFY,
2925 "resp=%u fan_type=%u fan_info=%u",
2926 response, friar->hdr.type, friar->audit_rule);
2927 }
2928 c -= friar->hdr.len;
2929 ib += friar->hdr.len;
2930 }
2931 }
2932

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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