On Wed, Oct 21, 2026 at 12:47:36PM +0530, Mukesh Kumar Chaurasiya wrote:
quoted
How this was found and tested: QEMU pseries (TCG, -cpu power9), ppc64le
guest config, v7.3-rc6 (7b63ef2d55f2), with a small reproducer
(ppc_skip_repro.c, available on request) which
Hey,
Can you share the reproducer?
Regards,
Mukesh
sure, it is here attached.
The output here follows.
before patch:
tracer syscall after PTRACE_SET_SYSCALL_INFO(EXIT) FAIL (got 0, want 1)
tracee sees value set at syscall-exit stop PASS (got 0, want 0)
tracee got 0
seccomp skip via regs, success value, sc FAIL (got 1, want 0)
seccomp skip via regs, error value, sc PASS (got 0, want 0)
tracee got 0
seccomp skip via regs, success value, scv FAIL (got 1, want 0)
seccomp skip via regs, error value, scv PASS (got 0, want 0)
FAIL: 3 failure(s)
after patch:
tracer syscall after PTRACE_SET_SYSCALL_INFO(EXIT) PASS (got 1, want 1)
tracee sees value set at syscall-exit stop PASS (got 0, want 0)
seccomp skip via regs, success value, sc PASS (got 0, want 0)
seccomp skip via regs, error value, sc PASS (got 0, want 0)
seccomp skip via regs, success value, scv PASS (got 0, want 0)
seccomp skip via regs, error value, scv PASS (got 0, want 0)
OK: 0 failure(s)
Thank you, Regards,
renzo