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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>
Wed, 11 Jun 2025 15:42:34 +0000 (17:42 +0200)
commitb76c6b7cae8751928d97e631bbbee267c70d8e44
tree2c009878fdf7c8872c35793e13279b5b669452b0tree | snapshot
parentcfa1a107f3146539d8dafc57c6ef9e8dfcad78b0commit | 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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