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bpftool: Check for NULL ptr of btf in codegen_asserts
authorMichael Mullin <masmullin@gmail.com>
Mon, 23 May 2022 19:49:17 +0000 (15:49 -0400)
committerAndrii Nakryiko <andrii@kernel.org>
Thu, 2 Jun 2022 23:26:43 +0000 (16:26 -0700)
commitde4b4b94fad90f876ab12e87999109e31a1871b4
tree1b795412ac72bdd5858073682f4b274b6d93d629tree
parenteb7b36ce47f830a01ad9405e673b563cc3638d5dcommit | diff
bpftool: Check for NULL ptr of btf in codegen_asserts

bpf_object__btf() can return a NULL value.  If bpf_object__btf returns
null, do not progress through codegen_asserts(). This avoids a null ptr
dereference at the call btf__type_cnt() in the function find_type_for_map()

Signed-off-by: Michael Mullin <masmullin@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220523194917.igkgorco42537arb@jup
tools/bpf/bpftool/gen.c diff | blob | history
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