https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274875
Bug ID: 274875
Summary: A possible null-pointer dereference caused by a data
race in sys/geom/gate/g_gate.c
Product: Base System
Version: 14.0-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
In the function g_gate_dumpconf(), sc->sc_readcons is first checked to be not
NULL:
if (sc->sc_readcons != NULL)
and then dereferenced:
sbuf_printf(sb, "%s<read_provider>%s</read_provider>\n",
indent, sc->sc_readcons->provider->name);
However, sc->sc_readcons can be set to NULL by other functions such as
g_gate_modify() right after it is checked:
sc->sc_readcons = NULL;
and thus can cause a null-pointer dereference.
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