From 836b2fe544a5e9b5ce116622cb36fba33838c6fd Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 01:33:23 -0700 Subject: selftests/bpf: Check that JMP32 pointer vs zero jumps are not predicted Add jmp32_ptr_vs_zero_jne: the fall-through of the 32-bit compare, which the verifier used to skip, contains an out of bounds map value access, hence w/o the previous patch the program is accepted. See previous patch for detailed description. Reported-by: Nicholas Carlini Suggested-by: Nicholas Carlini Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/bpf/20260904083325.2083493-6-eddyz87@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- security/lsm_notifier.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 security/lsm_notifier.c (limited to 'security/lsm_notifier.c') diff --git a/security/lsm_notifier.c b/security/lsm_notifier.c new file mode 100644 index 000000000..c92fad5d5 --- /dev/null +++ b/security/lsm_notifier.c @@ -0,0 +1,31 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * LSM notifier functions + * + */ + +#include +#include + +static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain); + +int call_blocking_lsm_notifier(enum lsm_event event, void *data) +{ + return blocking_notifier_call_chain(&blocking_lsm_notifier_chain, + event, data); +} +EXPORT_SYMBOL(call_blocking_lsm_notifier); + +int register_blocking_lsm_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&blocking_lsm_notifier_chain, + nb); +} +EXPORT_SYMBOL(register_blocking_lsm_notifier); + +int unregister_blocking_lsm_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain, + nb); +} +EXPORT_SYMBOL(unregister_blocking_lsm_notifier); -- cgit v1.3.1