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| author | Andrii Nakryiko <[email protected]> | 2025-06-06 20:21:34 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <[email protected]> | 2025-06-06 21:07:07 +0000 |
| commit | 02670deede2288d8e4e3d800477b27c091080fae (patch) | |
| tree | 59c6a1f82c552ebdb3d450a17f679520ec376dc4 /drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | |
| parent | Merge tag 'spi-v6.16-merge-window' of git://git.kernel.org/pub/scm/linux/kern... (diff) | |
| download | kernel-02670deede2288d8e4e3d800477b27c091080fae.tar.gz kernel-02670deede2288d8e4e3d800477b27c091080fae.zip | |
libbpf: Handle unsupported mmap-based /sys/kernel/btf/vmlinux correctly
libbpf_err_ptr() helpers are meant to return NULL and set errno, if
there is an error. But btf_parse_raw_mmap() is meant to be used
internally and is expected to return ERR_PTR() values. Because of this
mismatch, when libbpf tries to mmap /sys/kernel/btf/vmlinux, we don't
detect the error correctly with IS_ERR() check, and never fallback to
old non-mmap-based way of loading vmlinux BTF.
Fix this by using proper ERR_PTR() returns internally.
Reported-by: Arnaldo Carvalho de Melo <[email protected]>
Reviewed-by: Arnaldo Carvalho de Melo <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Fixes: 3c0421c93ce4 ("libbpf: Use mmap to parse vmlinux BTF from sysfs")
Cc: Lorenz Bauer <[email protected]>
Signed-off-by: Andrii Nakryiko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c')
0 files changed, 0 insertions, 0 deletions