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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/asm-generic/audit_read.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/asm-generic/audit_read.h')
| -rw-r--r-- | include/asm-generic/audit_read.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/include/asm-generic/audit_read.h b/include/asm-generic/audit_read.h new file mode 100644 index 000000000..d8dc3dd6b --- /dev/null +++ b/include/asm-generic/audit_read.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifdef __NR_readlink +__NR_readlink, +#endif +__NR_quotactl, +#ifdef __NR_quotactl_fd +__NR_quotactl_fd, +#endif +__NR_listxattr, +#ifdef __NR_listxattrat +__NR_listxattrat, +#endif +__NR_llistxattr, +__NR_flistxattr, +__NR_getxattr, +#ifdef __NR_getxattrat +__NR_getxattrat, +#endif +__NR_lgetxattr, +__NR_fgetxattr, +#ifdef __NR_readlinkat +__NR_readlinkat, +#endif +#ifdef __NR_file_getattr +__NR_file_getattr, +#endif +#ifdef __NR_stat +__NR_stat, +#endif +#ifdef __NR_stat64 +__NR_stat64, +#endif +#ifdef __NR_lstat +__NR_lstat, +#endif +#ifdef __NR_lstat64 +__NR_lstat64, +#endif +#ifdef __NR_fstat +__NR_fstat, +#endif +#ifdef __NR_fstat64 +__NR_fstat64, +#endif +#ifdef __NR_newfstatat +__NR_newfstatat, +#endif +#ifdef __NR_fstatat64 +__NR_fstatat64, +#endif +__NR_statx, |