Commit-ID: 865c66c4183aab1d12522ca3ad3a3339d2437e5c Gitweb: http://git.kernel.org/tip/865c66c4183aab1d12522ca3ad3a3339d2437e5c Author: Frederik Deweerdt <frederik.deweerdt@xxxxxxxx> AuthorDate: Mon, 14 Jan 2013 14:47:17 -0500 Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> CommitDate: Thu, 24 Jan 2013 16:40:36 -0300 perf annotate browser: Fix segfault when drawing out-of-bounds jumps Factorize jump sanity checks from mark_jump_targets() and draw_current_jump() in an is_valid_jump() function. This fixes a segfault when moving the cursor over an invalid jump. Signed-off-by: Frederik Deweerdt <frederik.deweerdt@xxxxxxxx> Cc: Namhyung Kim <namhyung@xxxxxxxxxx> Link: http://lkml.kernel.org/r/20130114194716.GA4973@xxxxxxxxxxxxxxxxxxxxxxxxx [ committer note: Make it a disasm_line method ] Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> --- tools/perf/ui/browsers/annotate.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c index 5dab3ca..2fc7f04 100644 --- a/tools/perf/ui/browsers/annotate.c +++ b/tools/perf/ui/browsers/annotate.c @@ -182,6 +182,16 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int ab->selection = dl; } +static bool disasm_line__is_valid_jump(struct disasm_line *dl, struct symbol *sym) +{ + if (!dl || !dl->ins || !ins__is_jump(dl->ins) + || !disasm_line__has_offset(dl) + || dl->ops.target.offset >= symbol__size(sym)) + return false; + + return true; +} + static void annotate_browser__draw_current_jump(struct ui_browser *browser) { struct annotate_browser *ab = container_of(browser, struct annotate_browser, b); @@ -195,8 +205,7 @@ static void annotate_browser__draw_current_jump(struct ui_browser *browser) if (strstr(sym->name, "@plt")) return; - if (!cursor || !cursor->ins || !ins__is_jump(cursor->ins) || - !disasm_line__has_offset(cursor)) + if (!disasm_line__is_valid_jump(cursor, sym)) return; target = ab->offsets[cursor->ops.target.offset]; @@ -788,17 +797,9 @@ static void annotate_browser__mark_jump_targets(struct annotate_browser *browser struct disasm_line *dl = browser->offsets[offset], *dlt; struct browser_disasm_line *bdlt; - if (!dl || !dl->ins || !ins__is_jump(dl->ins) || - !disasm_line__has_offset(dl)) + if (!disasm_line__is_valid_jump(dl, sym)) continue; - if (dl->ops.target.offset >= size) { - ui__error("jump to after symbol!\n" - "size: %zx, jump target: %" PRIx64, - size, dl->ops.target.offset); - continue; - } - dlt = browser->offsets[dl->ops.target.offset]; /* * FIXME: Oops, no jump target? Buggy disassembler? Or do we @@ -921,7 +922,7 @@ out_free_offsets: #define ANNOTATE_CFG(n) \ { .name = #n, .value = &annotate_browser__opts.n, } - + /* * Keep the entries sorted, they are bsearch'ed */ -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html