From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- net/atm/atm_misc.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 net/atm/atm_misc.c (limited to 'net/atm/atm_misc.c') diff --git a/net/atm/atm_misc.c b/net/atm/atm_misc.c new file mode 100644 index 000000000..c9d7609da --- /dev/null +++ b/net/atm/atm_misc.c @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0 +/* net/atm/atm_misc.c - Various functions for use by ATM drivers */ + +/* Written 1995-2000 by Werner Almesberger, EPFL ICA */ + +#include +#include +#include +#include +#include +#include +#include + +int atm_charge(struct atm_vcc *vcc, int truesize) +{ + atm_force_charge(vcc, truesize); + if (atomic_read(&sk_atm(vcc)->sk_rmem_alloc) <= sk_atm(vcc)->sk_rcvbuf) + return 1; + atm_return(vcc, truesize); + atomic_inc(&vcc->stats->rx_drop); + return 0; +} +EXPORT_SYMBOL(atm_charge); -- cgit v1.3.1