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| author | Daniel Borkmann <daniel@iogearbox.net> | 2026-05-29 11:41:18 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-05-31 17:47:48 -0700 |
| commit | d2f7bd066ed492aeaf82864fbf1f06770f9d9f9d (patch) | |
| tree | f8b48e2b73f8058844a3a916b7ca31f6f3c0999f /tools/lib | |
| parent | 3c5e2f1a85844abbb65df4694f5ebad0a13e219c (diff) | |
| download | linux-next-d2f7bd066ed492aeaf82864fbf1f06770f9d9f9d.tar.gz linux-next-d2f7bd066ed492aeaf82864fbf1f06770f9d9f9d.zip | |
libbpf: Also reset {insn,data}_cur on realloc failure
realloc_insn_buf() as well as realloc_data_buf() free and NULL
gen->insn_start / gen->data_start on -ENOMEM but leave gen->insn_cur /
gen->data_cur pointing into the old, freed buffer. Just reset the
cursors to NULL alongside the base pointers so the freed state is
coherent.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/r/20260529094119.307264-3-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/gen_loader.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/lib/bpf/gen_loader.c b/tools/lib/bpf/gen_loader.c index 3a6e1d53f287..492360ca07ea 100644 --- a/tools/lib/bpf/gen_loader.c +++ b/tools/lib/bpf/gen_loader.c @@ -63,6 +63,7 @@ static int realloc_insn_buf(struct bpf_gen *gen, __u32 size) gen->error = -ENOMEM; free(gen->insn_start); gen->insn_start = NULL; + gen->insn_cur = NULL; return -ENOMEM; } gen->insn_start = insn_start; @@ -86,6 +87,7 @@ static int realloc_data_buf(struct bpf_gen *gen, __u32 size) gen->error = -ENOMEM; free(gen->data_start); gen->data_start = NULL; + gen->data_cur = NULL; return -ENOMEM; } gen->data_start = data_start; |