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| author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-04 10:43:19 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 07:58:36 -0700 |
| commit | 6668ed271eaefaa63e686bdfbedaeb7b8e492722 (patch) | |
| tree | 58e8288fead484f6755ad0815fc74c3742663761 /include/net/ipconfig.h | |
| download | linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.tar.gz linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.zip | |
selftests/bpf: Reject graph kptr use after RCU unlockgrafted
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 <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/net/ipconfig.h')
| -rw-r--r-- | include/net/ipconfig.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/net/ipconfig.h b/include/net/ipconfig.h new file mode 100644 index 000000000..8276897d0 --- /dev/null +++ b/include/net/ipconfig.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 1997 Martin Mares + * + * Automatic IP Layer Configuration + */ + +/* The following are initdata: */ + +#include <linux/types.h> + +extern int ic_proto_enabled; /* Protocols enabled (see IC_xxx) */ +extern int ic_set_manually; /* IPconfig parameters set manually */ + +extern __be32 ic_myaddr; /* My IP address */ +extern __be32 ic_gateway; /* Gateway IP address */ + +extern __be32 ic_servaddr; /* Boot server IP address */ + +extern __be32 root_server_addr; /* Address of NFS server */ +extern u8 root_server_path[]; /* Path to mount as root */ + + +/* bits in ic_proto_{enabled,used} */ +#define IC_PROTO 0xFF /* Protocols mask: */ +#define IC_BOOTP 0x01 /* BOOTP (or DHCP, see below) */ +#define IC_RARP 0x02 /* RARP */ +#define IC_USE_DHCP 0x100 /* If on, use DHCP instead of BOOTP */ |