[LTP] [PATCH 3/4] syscalls/prctl04: Allow rt_sigprocmask in the syscall filter

[Tudor Cretu]

Some libcs (e.g. Musl) call rt_sigprocmask as part of their fork
implementation. To successfully call fork, rt_sigprocmask must be allowed
as well in the filter.

Signed-off-by: Tudor Cretu <tudor.cretu@arm.com>
---
 testcases/kernel/syscalls/prctl/prctl04.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/testcases/kernel/syscalls/prctl/prctl04.c b/testcases/kernel/syscalls/prctl/prctl04.c
index 1cc19bbd3..2f7e9a1ac 100644
--- a/testcases/kernel/syscalls/prctl/prctl04.c
+++ b/testcases/kernel/syscalls/prctl/prctl04.c
@@ -45,6 +45,7 @@
 static const struct sock_filter  strict_filter[] = {
 	BPF_STMT(BPF_LD | BPF_W | BPF_ABS, (offsetof(struct seccomp_data, nr))),
 
+	BPF_JUMP(BPF_JMP | BPF_JEQ, __NR_rt_sigprocmask, 6, 0),
 	BPF_JUMP(BPF_JMP | BPF_JEQ, __NR_close, 5, 0),
 	BPF_JUMP(BPF_JMP | BPF_JEQ, __NR_exit,  4, 0),
 	BPF_JUMP(BPF_JMP | BPF_JEQ, __NR_wait4, 3, 0),
-- 
2.25.1