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| author | Mark Johnston <markj@FreeBSD.org> | 2024-02-04 02:22:09 +0000 |
|---|---|---|
| committer | Mark Johnston <markj@FreeBSD.org> | 2024-02-04 22:52:30 +0000 |
| commit | dfabf3efaa795e657f3858b7e2d0b11f8a51ecb5 (patch) | |
| tree | ebc173bd96be0d526cfdf1c9aef1585eb0ca921a | |
| parent | 064fa628ce375028f2510182f4edbafa7f469ecb (diff) | |
| download | src-dfabf3efaa795e657f3858b7e2d0b11f8a51ecb5.tar.gz src-dfabf3efaa795e657f3858b7e2d0b11f8a51ecb5.zip | |
libjail: Guard against programmer error in jailparam_export()
If the caller didn't use jailparam_import() to fetch the parameter
value, an attempt to export it will trigger a segfault. Make it a bit
easier to figure out what's happening in this situation.
PR: 276809
Reviewed by: jamie
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D43732
| -rw-r--r-- | lib/libjail/jail.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/libjail/jail.c b/lib/libjail/jail.c index 864c6981db2b..8e5b420d677b 100644 --- a/lib/libjail/jail.c +++ b/lib/libjail/jail.c @@ -737,6 +737,12 @@ jailparam_export(struct jailparam *jp) int i, nval, ival; char valbuf[INET6_ADDRSTRLEN]; + if (jp->jp_value == NULL) { + snprintf(jail_errmsg, JAIL_ERRMSGLEN, + "parameter %s was not imported", jp->jp_name); + errno = EINVAL; + return (NULL); + } if ((jp->jp_ctltype & CTLTYPE) == CTLTYPE_STRING) { value = strdup(jp->jp_value); if (value == NULL) |