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| author | Eduard Zingerman <eddyz87@gmail.com> | 2026-09-04 01:33:23 -0700 |
|---|---|---|
| committer | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-04 12:58:04 +0200 |
| commit | 836b2fe544a5e9b5ce116622cb36fba33838c6fd (patch) | |
| tree | 95e38e4aaa0a6a78e373148b3d0af4aa2ab3d371 /samples/bpf/syscall_nrs.c | |
| download | linux-stable-836b2fe544a5e9b5ce116622cb36fba33838c6fd.tar.gz linux-stable-836b2fe544a5e9b5ce116622cb36fba33838c6fd.zip | |
selftests/bpf: Check that JMP32 pointer vs zero jumps are not predictedgrafted
Add jmp32_ptr_vs_zero_jne: the fall-through of the 32-bit compare, which
the verifier used to skip, contains an out of bounds map value access,
hence w/o the previous patch the program is accepted. See previous patch
for detailed description.
Reported-by: Nicholas Carlini <npc@anthropic.com>
Suggested-by: Nicholas Carlini <npc@anthropic.com>
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20260904083325.2083493-6-eddyz87@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Diffstat (limited to 'samples/bpf/syscall_nrs.c')
| -rw-r--r-- | samples/bpf/syscall_nrs.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/samples/bpf/syscall_nrs.c b/samples/bpf/syscall_nrs.c new file mode 100644 index 000000000..a6e600f3d --- /dev/null +++ b/samples/bpf/syscall_nrs.c @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <uapi/linux/unistd.h> +#include <linux/kbuild.h> + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wmissing-prototypes" + +#define SYSNR(_NR) DEFINE(SYS ## _NR, _NR) + +void syscall_defines(void) +{ + COMMENT("Linux system call numbers."); + SYSNR(__NR_write); + SYSNR(__NR_read); +#ifdef __NR_mmap2 + SYSNR(__NR_mmap2); +#endif +#ifdef __NR_mmap + SYSNR(__NR_mmap); +#endif + +} + +#pragma GCC diagnostic pop |