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/mac80211/trace.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 net/mac80211/trace.c (limited to 'net/mac80211/trace.c') diff --git a/net/mac80211/trace.c b/net/mac80211/trace.c new file mode 100644 index 000000000..837857261 --- /dev/null +++ b/net/mac80211/trace.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0 +/* bug in tracepoint.h, it should include this */ +#include + +/* sparse isn't too happy with all macros... */ +#ifndef __CHECKER__ +#include +#include "driver-ops.h" +#include "debug.h" +#define CREATE_TRACE_POINTS +#include "trace.h" +#include "trace_msg.h" + +#ifdef CONFIG_MAC80211_MESSAGE_TRACING +void __sdata_info(const char *fmt, ...) +{ + struct va_format vaf = { + .fmt = fmt, + }; + va_list args; + + va_start(args, fmt); + vaf.va = &args; + + pr_info("%pV", &vaf); + trace_mac80211_info(&vaf); + va_end(args); +} + +void __sdata_dbg(bool print, const char *fmt, ...) +{ + struct va_format vaf = { + .fmt = fmt, + }; + va_list args; + + va_start(args, fmt); + vaf.va = &args; + + if (print) + pr_debug("%pV", &vaf); + trace_mac80211_dbg(&vaf); + va_end(args); +} + +void __sdata_err(const char *fmt, ...) +{ + struct va_format vaf = { + .fmt = fmt, + }; + va_list args; + + va_start(args, fmt); + vaf.va = &args; + + pr_err("%pV", &vaf); + trace_mac80211_err(&vaf); + va_end(args); +} + +void __wiphy_dbg(struct wiphy *wiphy, bool print, const char *fmt, ...) +{ + struct va_format vaf = { + .fmt = fmt, + }; + va_list args; + + va_start(args, fmt); + vaf.va = &args; + + if (print) + wiphy_dbg(wiphy, "%pV", &vaf); + trace_mac80211_dbg(&vaf); + va_end(args); +} +#endif +#endif -- cgit v1.3.1