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Add yet one check for SEEK_END overflow

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This commit is contained in:
Andrey A. Chernov 2001-08-23 17:09:23 +00:00
parent c18092b2fb
commit 6fb9fbceab
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=82209
1 changed files with 2 additions and 1 deletions
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3
sys/kern/kern_lockf.c
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@ -122,7 +122,8 @@ lf_advlock(ap, head, size)
case SEEK_END:
/* 'size' is always >= 0 */
if (fl->l_start > 0 && size > OFF_MAX - fl->l_start)
if ((fl->l_start > 0 && size > OFF_MAX - fl->l_start) ||
(fl->l_start < 0 && size + fl->l_start > OFF_MAX))
return (EOVERFLOW);
start = size + fl->l_start;
break;