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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)
committerFelix Zielcke <fzielcke@z-51.de>
Thu, 3 Jul 2025 16:35:51 +0000 (18:35 +0200)
commitf3698d9b1336d16451c27c6a5b69f39511b8d222
tree35fa839e2eb6286666331f3d0a194c5bb64b951etree | snapshot
parent26fcb48cc48f12816c4bbb558feb1d92d387e229commit | 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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