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(parent: c324816) | patch
libbpf: Fix using invalidated memory in bpf_linker
authorAndrii Nakryiko <andrii@kernel.org>
Wed, 24 Nov 2021 00:23:18 +0000 (16:23 -0800)
committerDaniel Borkmann <daniel@iogearbox.net>
Thu, 25 Nov 2021 23:15:03 +0000 (00:15 +0100)
commit847e3a02a38f508ea5663991f027f1d8b9c48772
treefa57f0773226c642232f84063ffc07d93250cf94tree | snapshot
parentc324816a11ed424fdf1d420703acbea8949b42bfcommit | diff
libbpf: Fix using invalidated memory in bpf_linker

add_dst_sec() can invalidate bpf_linker's section index making
dst_symtab pointer pointing into unallocated memory. Reinitialize
dst_symtab pointer on each iteration to make sure it's always valid.

Fixes: a554049c4f96 ("libbpf: Add BPF static linker APIs")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211124002325.1737739-7-andrii@kernel.org
tools/lib/bpf/linker.c diff | blob | history
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