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| author | Nuoqi Gui <gnq25@mails.tsinghua.edu.cn> | 2026-09-04 12:41:55 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 12:24:25 -0700 |
| commit | 2b97956af60810cd382b86b9ce9aea421b889861 (patch) | |
| tree | 7d9b0d8a91f77e63deff23976f68555a4895346a /include/net/ipcomp.h | |
| download | linux-stable-2b97956af60810cd382b86b9ce9aea421b889861.tar.gz linux-stable-2b97956af60810cd382b86b9ce9aea421b889861.zip | |
selftests/bpf: Test rhtab kptr cancellation semanticsgrafted
Resizable hash-map updates and deletions must not perform full special-field
destruction in their caller context. In particular, a referenced kptr must
remain attached to the allocation until the memory allocator destructor can
release it safely.
Add separate coverage for both affected paths. The update test stores a task
kptr, replaces the ordinary value bytes with BPF_EXIST, and verifies that the
kptr survived. The delete test removes an element and exchanges its kptr
through the still-valid map-value pointer before the allocation is reclaimed.
Both cases observe a NULL kptr when rhtab uses bpf_obj_free_fields(). They
recover and release the reference after rhtab switches to cancellation
semantics.
Signed-off-by: Nuoqi Gui <gnq25@mails.tsinghua.edu.cn>
[ kkd: Split update and delete coverage and rewrote the commit log ]
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904104203.345917-5-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/net/ipcomp.h')
| -rw-r--r-- | include/net/ipcomp.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/net/ipcomp.h b/include/net/ipcomp.h new file mode 100644 index 000000000..51401f01e --- /dev/null +++ b/include/net/ipcomp.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _NET_IPCOMP_H +#define _NET_IPCOMP_H + +#include <linux/skbuff.h> + +struct ip_comp_hdr; +struct netlink_ext_ack; +struct xfrm_state; + +int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb); +int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb); +void ipcomp_destroy(struct xfrm_state *x); +int ipcomp_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack); + +static inline struct ip_comp_hdr *ip_comp_hdr(const struct sk_buff *skb) +{ + return (struct ip_comp_hdr *)skb_transport_header(skb); +} + +#endif |