From bce7698e2e6565bb765bd0522337f29f5f312624 Mon Sep 17 00:00:00 2001 From: Haojie Li Date: Tue, 25 Aug 2026 18:08:45 +0800 Subject: drm/mediatek: Add missing IS_ERR check for ovl_adaptor platform device platform_device_register_data() can fail and return an ERR_PTR, but the return value is used without checking, leading to an invalid pointer being stored in ddp_comp[].dev and passed to component_match_add() and mtk_ddp_comp_init(), which could result in a kernel crash. Add an IS_ERR() check to jump to the error handling path on failure. Fixes: 0d9eee9118b7 ("drm/mediatek: Add drm ovl_adaptor sub driver for MT8195") Cc: stable@vger.kernel.org Signed-off-by: Haojie Li Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260825100845.438893-1-lihaojie@kylinos.cn/ Signed-off-by: Chun-Kuang Hu --- tools/perf/util/find-map.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 tools/perf/util/find-map.c (limited to 'tools/perf/util/find-map.c') diff --git a/tools/perf/util/find-map.c b/tools/perf/util/find-map.c new file mode 100644 index 000000000..bba511795 --- /dev/null +++ b/tools/perf/util/find-map.c @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include + +static int find_map(void **start, void **end, const char *name) +{ + FILE *maps; + char *line = NULL; + size_t len = 0; + int found = 0; + + maps = fopen("/proc/self/maps", "r"); + if (!maps) { + fprintf(stderr, "cannot open maps\n"); + return -1; + } + + while (!found && getline(&line, &len, maps) != -1) { + int m = -1; + + /* We care only about private r-x mappings. */ + if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n", + start, end, &m)) + continue; + if (m < 0) + continue; + + if (!strncmp(&line[m], name, strlen(name))) + found = 1; + } + + free(line); + fclose(maps); + return !found; +} -- cgit v1.3.1