diff options
| 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/asm-generic/audit_write.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/asm-generic/audit_write.h')
| -rw-r--r-- | include/asm-generic/audit_write.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/asm-generic/audit_write.h b/include/asm-generic/audit_write.h new file mode 100644 index 000000000..378128dc3 --- /dev/null +++ b/include/asm-generic/audit_write.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#include <asm-generic/audit_dir_write.h> +__NR_acct, +#ifdef __NR_swapon +__NR_swapon, +#endif +__NR_quotactl, +#ifdef __NR_quotactl_fd +__NR_quotactl_fd, +#endif +#ifdef __NR_truncate +__NR_truncate, +#endif +#ifdef __NR_truncate64 +__NR_truncate64, +#endif +#ifdef __NR_ftruncate +__NR_ftruncate, +#endif +#ifdef __NR_ftruncate64 +__NR_ftruncate64, +#endif +#ifdef __NR_bind +__NR_bind, /* bind can affect fs object only in one way... */ +#endif +#ifdef __NR_fallocate +__NR_fallocate, +#endif |