| Message ID | 20241106181211.568775-1-pbonzini@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] eif: cope with huge section offsets | expand |
On Thu, Nov 7, 2024 at 12:12 AM Paolo Bonzini <pbonzini@redhat.com> wrote: > > Check for overflow to avoid that fseek() receives a sign-extended value. > > Cc: Dorjoy Chowdhury <dorjoychy111@gmail.com> > Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> > --- > include/qemu/osdep.h | 4 ++++ > hw/core/eif.c | 4 ++++ > 2 files changed, 8 insertions(+) > Reviewed-by: Dorjoy Chowdhury <dorjoychy111@gmail.com> Thanks for fixing! Regards, Dorjoy
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index fe7c3c5f673..fdff07fd992 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -297,6 +297,10 @@ void QEMU_ERROR("code path is reachable") #error building with G_DISABLE_ASSERT is not supported #endif +#ifndef OFF_MAX +#define OFF_MAX (sizeof (off_t) == 8 ? INT64_MAX : INT32_MAX) +#endif + #ifndef O_LARGEFILE #define O_LARGEFILE 0 #endif diff --git a/hw/core/eif.c b/hw/core/eif.c index 7f3b2edc9a7..61329aacfe1 100644 --- a/hw/core/eif.c +++ b/hw/core/eif.c @@ -466,6 +466,10 @@ bool read_eif_file(const char *eif_path, const char *machine_initrd, EifSectionHeader hdr; uint16_t section_type; + if (eif_header.section_offsets[i] > OFF_MAX) { + error_setg(errp, "Invalid EIF image. Section offset out of bounds"); + goto cleanup; + } if (fseek(f, eif_header.section_offsets[i], SEEK_SET) != 0) { error_setg_errno(errp, errno, "Failed to offset to %" PRIu64 " in EIF file", eif_header.section_offsets[i]);
Check for overflow to avoid that fseek() receives a sign-extended value. Cc: Dorjoy Chowdhury <dorjoychy111@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> --- include/qemu/osdep.h | 4 ++++ hw/core/eif.c | 4 ++++ 2 files changed, 8 insertions(+)