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drm/amdgpu: Fix vbios build number parsing logic

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It's not necessary that the build string and atom header section has a
difference of 32 bytes. Use the remaining bytes in the section as copy
limit.

Fixes: d6fa802661 ("drm/amdgpu: Add vbios build number interface")
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lijo Lazar
2025-09-18 17:52:04 +05:30
committed by Alex Deucher
parent 342f141ba9
commit b29c22b8da
1 changed files with 4 additions and 3 deletions
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7
drivers/gpu/drm/amd/amdgpu/atom.c
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@@ -1502,7 +1502,7 @@ static void atom_get_vbios_build(struct atom_context *ctx)
{
unsigned char *atom_rom_hdr;
unsigned char *str;
uint16_t base;
uint16_t base, len;
base = CU16(ATOM_ROM_TABLE_PTR);
atom_rom_hdr = CSTR(base);
@@ -1515,8 +1515,9 @@ static void atom_get_vbios_build(struct atom_context *ctx)
while (str < atom_rom_hdr && *str++)
;
if ((str + STRLEN_NORMAL) < atom_rom_hdr)
strscpy(ctx->build_num, str, STRLEN_NORMAL);
len = min(atom_rom_hdr - str, STRLEN_NORMAL);
if (len)
strscpy(ctx->build_num, str, len);
}
struct atom_context *amdgpu_atom_parse(struct card_info *card, void *bios)