On Tue, 10 Dec 2019 19:14:12 +0100, Toke Høiland-Jørgensen wrote:
> When the kptr_restrict sysctl is set, the kernel can fail to return
> jited_ksyms or jited_prog_insns, but still have positive values in
> nr_jited_ksyms and jited_prog_len. This causes bpftool to crash when trying
> to dump the program because it only checks the len fields not the actual
> pointers to the instructions and ksyms.
>
> Fix this by adding the missing checks.
>
> Signed-off-by: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
Fixes: 71bb428fe2c1 ("tools: bpf: add bpftool")
and
Fixes: f84192ee00b7 ("tools: bpftool: resolve calls without using imm field")
?
