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-rw-r--r--sys/compat/linux/linux_signal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/compat/linux/linux_signal.c b/sys/compat/linux/linux_signal.c
index 5910d62..9cc05ed9 100644
--- a/sys/compat/linux/linux_signal.c
+++ b/sys/compat/linux/linux_signal.c
@@ -565,7 +565,7 @@ linux_do_tkill(struct thread *td, l_int tgid, l_int pid, l_int signum)
AUDIT_ARG_PROCESS(p);
error = p_cansignal(td, p, signum);
- if (error)
+ if (error != 0 || signum == 0)
goto out;
error = ESRCH;
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