Hi Masami, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on tip/perf/core] [cannot apply to v4.16-rc2 next-20180223] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Masami-Hiramatsu/tracing-probeevent-Cleanup-print-argument-functions/20180216-135003 smatch warnings: kernel/trace/trace_uprobe.c:117 probe_user_read() warn: maybe return -EFAULT instead of the bytes remaining? kernel/trace/trace_uprobe.c:117 probe_user_read() warn: maybe return -EFAULT instead of the bytes remaining? # https://github.com/0day-ci/linux/commit/c485f76c0d6cd1ab521fd0d83fe0e6879f03fa27 git remote add linux-review https://github.com/0day-ci/linux git remote update linux-review git checkout c485f76c0d6cd1ab521fd0d83fe0e6879f03fa27 vim +117 kernel/trace/trace_uprobe.c 3fd996a29 Namhyung Kim 2013-11-26 108 3fd996a29 Namhyung Kim 2013-11-26 109 /* 3fd996a29 Namhyung Kim 2013-11-26 110 * Uprobes-specific fetch functions 3fd996a29 Namhyung Kim 2013-11-26 111 */ c485f76c0 Masami Hiramatsu 2018-02-14 112 static nokprobe_inline int c485f76c0 Masami Hiramatsu 2018-02-14 113 probe_user_read(void *dest, void *src, size_t size) c485f76c0 Masami Hiramatsu 2018-02-14 114 { c485f76c0 Masami Hiramatsu 2018-02-14 115 void __user *vaddr = (void __force __user *)src; c485f76c0 Masami Hiramatsu 2018-02-14 116 c485f76c0 Masami Hiramatsu 2018-02-14 @117 return copy_from_user(dest, vaddr, size); c485f76c0 Masami Hiramatsu 2018-02-14 118 } 5baaa59ef Namhyung Kim 2013-11-26 119 /* 5baaa59ef Namhyung Kim 2013-11-26 120 * Fetch a null-terminated string. Caller MUST set *(u32 *)dest with max 5baaa59ef Namhyung Kim 2013-11-26 121 * length and relative data location. 5baaa59ef Namhyung Kim 2013-11-26 122 */ c485f76c0 Masami Hiramatsu 2018-02-14 123 static nokprobe_inline void c485f76c0 Masami Hiramatsu 2018-02-14 124 fetch_store_string(unsigned long addr, void *dest) 5baaa59ef Namhyung Kim 2013-11-26 125 { 5baaa59ef Namhyung Kim 2013-11-26 126 long ret; 5baaa59ef Namhyung Kim 2013-11-26 127 u32 rloc = *(u32 *)dest; 5baaa59ef Namhyung Kim 2013-11-26 128 int maxlen = get_rloc_len(rloc); 5baaa59ef Namhyung Kim 2013-11-26 129 u8 *dst = get_rloc_data(dest); 5baaa59ef Namhyung Kim 2013-11-26 130 void __user *src = (void __force __user *) addr; 5baaa59ef Namhyung Kim 2013-11-26 131 5baaa59ef Namhyung Kim 2013-11-26 132 if (!maxlen) 5baaa59ef Namhyung Kim 2013-11-26 133 return; 5baaa59ef Namhyung Kim 2013-11-26 134 5baaa59ef Namhyung Kim 2013-11-26 135 ret = strncpy_from_user(dst, src, maxlen); 5baaa59ef Namhyung Kim 2013-11-26 136 5baaa59ef Namhyung Kim 2013-11-26 137 if (ret < 0) { /* Failed to fetch string */ 5baaa59ef Namhyung Kim 2013-11-26 138 ((u8 *)get_rloc_data(dest))[0] = '\0'; 5baaa59ef Namhyung Kim 2013-11-26 139 *(u32 *)dest = make_data_rloc(0, get_rloc_offs(rloc)); 5baaa59ef Namhyung Kim 2013-11-26 140 } else { 5baaa59ef Namhyung Kim 2013-11-26 141 *(u32 *)dest = make_data_rloc(ret, get_rloc_offs(rloc)); 5baaa59ef Namhyung Kim 2013-11-26 142 } 5baaa59ef Namhyung Kim 2013-11-26 143 } 5baaa59ef Namhyung Kim 2013-11-26 144 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation _______________________________________________ kbuild mailing list kbuild@lists.01.org https://lists.01.org/mailman/listinfo/kbuild
