Patch "libbpf: Fix return zero when elf_begin failed" has been added to the 6.13-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    libbpf: Fix return zero when elf_begin failed

to the 6.13-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     libbpf-fix-return-zero-when-elf_begin-failed.patch
and it can be found in the queue-6.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit ba07973c3845a0ad6a5abcc55ae92acbe60e243e
Author: Pu Lehui <pulehui@xxxxxxxxxx>
Date:   Wed Jan 15 10:02:39 2025 +0000

    libbpf: Fix return zero when elf_begin failed
    
    [ Upstream commit 5436a54332c19df0acbef2b87cbf9f7cba56f2dd ]
    
    The error number of elf_begin is omitted when encapsulating the
    btf_find_elf_sections function.
    
    Fixes: c86f180ffc99 ("libbpf: Make btf_parse_elf process .BTF.base transparently")
    Signed-off-by: Pu Lehui <pulehui@xxxxxxxxxx>
    Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
    Link: https://lore.kernel.org/bpf/20250115100241.4171581-2-pulehui@xxxxxxxxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 12468ae0d573d..7e810fa468eaa 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -1186,6 +1186,7 @@ static struct btf *btf_parse_elf(const char *path, struct btf *base_btf,
 
 	elf = elf_begin(fd, ELF_C_READ, NULL);
 	if (!elf) {
+		err = -LIBBPF_ERRNO__FORMAT;
 		pr_warn("failed to open %s as ELF file\n", path);
 		goto done;
 	}