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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)
commit593835377f24ca1bb98008ec1dc3baefe491ad6e
treefa57f0773226c642232f84063ffc07d93250cf94tree | snapshot
parent8cb125566c40b7141d8842c534f0ea5820ee3d5ccommit | 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: faf6ed321cf6 ("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
ep93xx device tree rework repo: git://git.maquefel.me/linux.git