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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 /tools/include/uapi/asm | |
| 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 'tools/include/uapi/asm')
| -rw-r--r-- | tools/include/uapi/asm/bitsperlong.h | 18 | ||||
| -rw-r--r-- | tools/include/uapi/asm/bpf_perf_event.h | 13 | ||||
| -rw-r--r-- | tools/include/uapi/asm/errno.h | 16 |
3 files changed, 47 insertions, 0 deletions
diff --git a/tools/include/uapi/asm/bitsperlong.h b/tools/include/uapi/asm/bitsperlong.h new file mode 100644 index 000000000..c65267afc --- /dev/null +++ b/tools/include/uapi/asm/bitsperlong.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#if defined(__i386__) || defined(__x86_64__) +#include "../../../arch/x86/include/uapi/asm/bitsperlong.h" +#elif defined(__powerpc__) +#include "../../../arch/powerpc/include/uapi/asm/bitsperlong.h" +#elif defined(__s390__) +#include "../../../arch/s390/include/uapi/asm/bitsperlong.h" +#elif defined(__sparc__) +#include "../../../arch/sparc/include/uapi/asm/bitsperlong.h" +#elif defined(__mips__) +#include "../../../arch/mips/include/uapi/asm/bitsperlong.h" +#elif defined(__ia64__) +#include "../../../arch/ia64/include/uapi/asm/bitsperlong.h" +#elif defined(__alpha__) +#include "../../../arch/alpha/include/uapi/asm/bitsperlong.h" +#else +#include <asm-generic/bitsperlong.h> +#endif diff --git a/tools/include/uapi/asm/bpf_perf_event.h b/tools/include/uapi/asm/bpf_perf_event.h new file mode 100644 index 000000000..ff52668ab --- /dev/null +++ b/tools/include/uapi/asm/bpf_perf_event.h @@ -0,0 +1,13 @@ +#if defined(__aarch64__) +#include "../../arch/arm64/include/uapi/asm/bpf_perf_event.h" +#elif defined(__arc__) +#include "../../arch/arc/include/uapi/asm/bpf_perf_event.h" +#elif defined(__s390__) +#include "../../arch/s390/include/uapi/asm/bpf_perf_event.h" +#elif defined(__riscv) +#include "../../arch/riscv/include/uapi/asm/bpf_perf_event.h" +#elif defined(__loongarch__) +#include "../../arch/loongarch/include/uapi/asm/bpf_perf_event.h" +#else +#include <uapi/asm-generic/bpf_perf_event.h> +#endif diff --git a/tools/include/uapi/asm/errno.h b/tools/include/uapi/asm/errno.h new file mode 100644 index 000000000..869379f91 --- /dev/null +++ b/tools/include/uapi/asm/errno.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#if defined(__i386__) || defined(__x86_64__) +#include "../../../arch/x86/include/uapi/asm/errno.h" +#elif defined(__powerpc__) +#include "../../../arch/powerpc/include/uapi/asm/errno.h" +#elif defined(__sparc__) +#include "../../../arch/sparc/include/uapi/asm/errno.h" +#elif defined(__alpha__) +#include "../../../arch/alpha/include/uapi/asm/errno.h" +#elif defined(__mips__) +#include "../../../arch/mips/include/uapi/asm/errno.h" +#elif defined(__hppa__) +#include "../../../arch/parisc/include/uapi/asm/errno.h" +#else +#include <asm-generic/errno.h> +#endif |