From fd746b95987239073f7872275cd68fe8cb29e0ed Mon Sep 17 00:00:00 2001 From: Soham Kute Date: Sun, 8 Feb 2026 01:43:40 +0530 Subject: [PATCH] [PATCH v2] media: vidtv: fix general protection fault in vidtv_psi_ts_psi_write_into Add defensive validation for psi_write_args pointers to avoid null pointer dereference reported by syzbot. Reported-by: syzbot+814c351d094f41a1b86@syzkaller.appspotmail.com Signed-off-by: Soham Kute --- drivers/media/test-drivers/vidtv/vidtv_psi.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/media/test-drivers/vidtv/vidtv_psi.c b/drivers/media/test-drivers/vidtv/vidtv_psi.c index 2a51c898c..bac0ea03b 100644 --- a/drivers/media/test-drivers/vidtv/vidtv_psi.c +++ b/drivers/media/test-drivers/vidtv/vidtv_psi.c @@ -156,7 +156,13 @@ static void vidtv_psi_set_sec_len(struct vidtv_psi_table_header *h, u16 new_len) * add stuffing (i.e. padding bytes) after the CRC */ static u32 vidtv_psi_ts_psi_write_into(struct psi_write_args *args) -{ +{ + if (!args || !args->dest_buf || !args->from || + !args->continuity_counter) { + pr_warn_once("%s: invalid write arguments\n", __func__); + return 0; + } + struct vidtv_mpeg_ts ts_header = { .sync_byte = TS_SYNC_BYTE, .bitfield = cpu_to_be16((args->new_psi_section << 14) | args->pid), -- 2.34.1