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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 /lib/debug_info.c | |
| 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 'lib/debug_info.c')
| -rw-r--r-- | lib/debug_info.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/lib/debug_info.c b/lib/debug_info.c new file mode 100644 index 000000000..cc4723c74 --- /dev/null +++ b/lib/debug_info.c @@ -0,0 +1,27 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * This file exists solely to ensure debug information for some core + * data structures is included in the final image even for + * CONFIG_DEBUG_INFO_REDUCED. Please do not add actual code. However, + * adding appropriate #includes is fine. + */ +#include <linux/cred.h> +#include <linux/crypto.h> +#include <linux/dcache.h> +#include <linux/device.h> +#include <linux/fs.h> +#include <linux/fscache-cache.h> +#include <linux/io.h> +#include <linux/kallsyms.h> +#include <linux/kernel.h> +#include <linux/kobject.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/net.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/stdarg.h> +#include <linux/types.h> +#include <net/addrconf.h> +#include <net/sock.h> +#include <net/tcp.h> |