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 --- samples/bpf/trace_output.bpf.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 samples/bpf/trace_output.bpf.c (limited to 'samples/bpf/trace_output.bpf.c') diff --git a/samples/bpf/trace_output.bpf.c b/samples/bpf/trace_output.bpf.c new file mode 100644 index 000000000..565a73b51 --- /dev/null +++ b/samples/bpf/trace_output.bpf.c @@ -0,0 +1,29 @@ +#include "vmlinux.h" +#include +#include + +struct { + __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY); + __uint(key_size, sizeof(int)); + __uint(value_size, sizeof(u32)); + __uint(max_entries, 2); +} my_map SEC(".maps"); + +SEC("ksyscall/write") +int bpf_prog1(struct pt_regs *ctx) +{ + struct S { + u64 pid; + u64 cookie; + } data; + + data.pid = bpf_get_current_pid_tgid(); + data.cookie = 0x12345678; + + bpf_perf_event_output(ctx, &my_map, 0, &data, sizeof(data)); + + return 0; +} + +char _license[] SEC("license") = "GPL"; +u32 _version SEC("version") = LINUX_VERSION_CODE; -- cgit v1.3.1