If uhdlc_priv_tsa != 1 then utdm is not initialized. And if ret != NULL then goto undo_uhdlc_init, where utdm is dereferenced. Same if dev == NULL.
Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Ekaterina Esina <ees...@astralinux.ru> --- drivers/net/wan/fsl_ucc_hdlc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c index 22edea6ca4b8..2ddb0f71e648 100644 --- a/drivers/net/wan/fsl_ucc_hdlc.c +++ b/drivers/net/wan/fsl_ucc_hdlc.c @@ -1243,7 +1243,9 @@ static int ucc_hdlc_probe(struct platform_device *pdev) free_dev: free_netdev(dev); undo_uhdlc_init: - iounmap(utdm->siram); + if (utdm != NULL) { + iounmap(utdm->siram); + } unmap_si_regs: iounmap(utdm->si_regs); free_utdm: -- 2.30.2