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loader/i386/bsd: Use safe math to avoid underflow
authorAlec Brown <alec.r.brown@oracle.com>
Wed, 5 Feb 2025 22:04:08 +0000 (22:04 +0000)
committerMiao Wang <shankerwangmiao@gmail.com>
Sun, 15 Feb 2026 13:50:20 +0000 (13:50 +0000)
commita5f18103d6ad6aed99dda6f1d052e36789e32025
treebe12b4544d8227ca8e3ee7c3a167b9d00b2f2b90tree | snapshot
parentb20693bc586788a2807f9f241edbf53e647b5071commit | diff
loader/i386/bsd: Use safe math to avoid underflow

The operation kern_end - kern_start may underflow when we input it into
grub_relocator_alloc_chunk_addr() call. To avoid this we can use safe
math for this subtraction.

Fixes: CID 73845
Signed-off-by: Alec Brown <alec.r.brown@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Gbp-Pq: Topic cve-2025-jan
Gbp-Pq: Name loader-i386-bsd-Use-safe-math-to-avoid-underflow.patch
grub-core/loader/i386/bsd.c diff | blob | history
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