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Code Issues Releases Activity

- Add a mutex to lock the global securelevel value.

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- Make use of MTX_SYSINIT() as the means to initialize our mutex lock.
This commit is contained in:
Andrew R. Reiter 2002-04-02 17:43:17 +00:00
parent 5320165b09
commit 72a492cacf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=93686
1 changed files with 9 additions and 1 deletions
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10
sys/kern/kern_mib.c
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@ -204,6 +204,10 @@ SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
#endif
int securelevel = -1;
struct mtx securelevel_mtx;
MTX_SYSINIT(securelevel_lock, &securelevel_mtx, "securelevel mutex lock",
MTX_DEF);
static int
sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
@ -240,10 +244,14 @@ sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
pr->pr_securelevel = level;
mtx_unlock(&pr->pr_mtx);
} else {
mtx_lock(&securelevel_mtx);
if (!regression_securelevel_nonmonotonic &&
(level < securelevel))
(level < securelevel)) {
mtx_unlock(&securelevel_mtx);
return (EPERM);
}
securelevel = level;
mtx_unlock(&securelevel_mtx);
}
return (error);
}