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When user specifies the bootcode with size smaller than VTOC_BOOTCODE,

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gpart_write_partcode_vtoc8 does access out of range of allocated memory.
Check size of bootcode before writing it.

Pointed out by:		ru
MFC after:		1 week
This commit is contained in:
Andrey V. Elsukov 2011-06-21 10:35:20 +00:00
parent f5857e2d3d
commit 8fb2868c61
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=223364
1 changed files with 4 additions and 1 deletions
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5
sbin/geom/class/part/geom_part.c
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@ -1208,8 +1208,11 @@ gpart_bootcode(struct gctl_req *req, unsigned int fl)
if (idx == 0)
errx(EXIT_FAILURE, "missing -i option");
gpart_write_partcode(gp, idx, partcode, partsize);
} else
} else {
if (partsize != VTOC_BOOTSIZE)
errx(EXIT_FAILURE, "invalid bootcode");
gpart_write_partcode_vtoc8(gp, idx, partcode);
}
} else
if (bootcode == NULL)
errx(EXIT_FAILURE, "no -b nor -p");