From 6668ed271eaefaa63e686bdfbedaeb7b8e492722 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Fri, 4 Sep 2026 10:43:19 +0200 Subject: selftests/bpf: Reject graph kptr use after RCU unlock Add a sleepable verifier test that loads a graph-node local kptr in an explicit RCU read-side critical section, then passes its node to bpf_rbtree_remove() after the section ends. Before the verifier fix, the stale NON_OWN_REF flag makes the node look like a live borrowed reference and the program is accepted. After the fix, the pointer is demoted without NON_OWN_REF and the graph kfunc argument is rejected. Also exercise a graph kptr loaded while a spin lock provides implicit RCU protection. The pointer must be invalidated when the lock is released, which guards the required ordering between non-owning-reference invalidation and RCU demotion. Update the existing fault-protected load test state description. The post-unlock pointer no longer carries NON_OWN_REF, but remains readable because the load is rewritten to use BPF_PROBE_MEM. Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/tty/Makefile | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 drivers/tty/Makefile (limited to 'drivers/tty/Makefile') diff --git a/drivers/tty/Makefile b/drivers/tty/Makefile new file mode 100644 index 000000000..8ca1a0a22 --- /dev/null +++ b/drivers/tty/Makefile @@ -0,0 +1,30 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_TTY) += tty_io.o n_tty.o tty_ioctl.o tty_ldisc.o \ + tty_buffer.o tty_port.o tty_mutex.o \ + tty_ldsem.o tty_baudrate.o tty_jobctrl.o \ + n_null.o +obj-$(CONFIG_LEGACY_PTYS) += pty.o +obj-$(CONFIG_UNIX98_PTYS) += pty.o +obj-$(CONFIG_AUDIT) += tty_audit.o +obj-$(CONFIG_MAGIC_SYSRQ) += sysrq.o +obj-$(CONFIG_N_HDLC) += n_hdlc.o +obj-$(CONFIG_N_GSM) += n_gsm.o + +obj-y += vt/ +obj-$(CONFIG_HVC_DRIVER) += hvc/ +obj-y += serial/ +obj-$(CONFIG_SERIAL_DEV_BUS) += serdev/ + +# tty drivers +obj-$(CONFIG_AMIGA_BUILTIN_SERIAL) += amiserial.o +obj-$(CONFIG_MOXA_INTELLIO) += moxa.o +obj-$(CONFIG_MOXA_SMARTIO) += mxser.o +obj-$(CONFIG_NOZOMI) += nozomi.o +obj-$(CONFIG_NULL_TTY) += ttynull.o +obj-$(CONFIG_PPC_EPAPR_HV_BYTECHAN) += ehv_bytechan.o +obj-$(CONFIG_GOLDFISH_TTY) += goldfish.o +obj-$(CONFIG_MIPS_EJTAG_FDC_TTY) += mips_ejtag_fdc.o +obj-$(CONFIG_VCC) += vcc.o +obj-$(CONFIG_RPMSG_TTY) += rpmsg_tty.o + +obj-y += ipwireless/ -- cgit v1.3.1