Commit 442b4eb3 authored by Ivan Krylov's avatar Ivan Krylov Committed by Arnaldo Carvalho de Melo

perf annotate: Pass filename to objdump via execl

The symbol__disassemble() function uses shell to launch objdump and
filter its output via grep. Passing filenames by interpolating them into
the command line via "%s" may lead to problems if said filenames contain
special characters.

Instead, pass the filename as a command line argument where it is not
subject to any kind of interpretation, then use quoted shell
interpolation to build the strings we need safely.
Signed-off-by: default avatarIvan Krylov <krylov.r00t@gmail.com>
Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20181014111803.5d83b806@TarkusSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent a3366db0
...@@ -1723,15 +1723,14 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args) ...@@ -1723,15 +1723,14 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
err = asprintf(&command, err = asprintf(&command,
"%s %s%s --start-address=0x%016" PRIx64 "%s %s%s --start-address=0x%016" PRIx64
" --stop-address=0x%016" PRIx64 " --stop-address=0x%016" PRIx64
" -l -d %s %s -C \"%s\" 2>/dev/null|grep -v \"%s:\"|expand", " -l -d %s %s -C \"$1\" 2>/dev/null|grep -v \"$1:\"|expand",
opts->objdump_path ?: "objdump", opts->objdump_path ?: "objdump",
opts->disassembler_style ? "-M " : "", opts->disassembler_style ? "-M " : "",
opts->disassembler_style ?: "", opts->disassembler_style ?: "",
map__rip_2objdump(map, sym->start), map__rip_2objdump(map, sym->start),
map__rip_2objdump(map, sym->end), map__rip_2objdump(map, sym->end),
opts->show_asm_raw ? "" : "--no-show-raw", opts->show_asm_raw ? "" : "--no-show-raw",
opts->annotate_src ? "-S" : "", opts->annotate_src ? "-S" : "");
symfs_filename, symfs_filename);
if (err < 0) { if (err < 0) {
pr_err("Failure allocating memory for the command to run\n"); pr_err("Failure allocating memory for the command to run\n");
...@@ -1756,7 +1755,8 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args) ...@@ -1756,7 +1755,8 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
close(stdout_fd[0]); close(stdout_fd[0]);
dup2(stdout_fd[1], 1); dup2(stdout_fd[1], 1);
close(stdout_fd[1]); close(stdout_fd[1]);
execl("/bin/sh", "sh", "-c", command, NULL); execl("/bin/sh", "sh", "-c", command, "--", symfs_filename,
NULL);
perror(command); perror(command);
exit(-1); exit(-1);
} }
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment