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Commit a6ae5b7a authored by Michael Weiser's avatar Michael Weiser Committed by Greg Kroah-Hartman
Browse files

arm64: Remove unimplemented syscall log message 



commit 1962682d2b2fbe6cfa995a85c53c069fadda473e upstream.

Stop printing a (ratelimited) kernel message for each instance of an
unimplemented syscall being called. Userland making an unimplemented
syscall is not necessarily misbehaviour and to be expected with a
current userland running on an older kernel. Also, the current message
looks scary to users but does not actually indicate a real problem nor
help them narrow down the cause. Just rely on sys_ni_syscall() to return
-ENOSYS.

Cc: <stable@vger.kernel.org>
Acked-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarMichael Weiser <michael.weiser@gmx.de>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent aa4d57de

arch/arm64/kernel/traps.c

+0 −8
Original line number Diff line number Diff line
@@ -381,14 +381,6 @@ asmlinkage long do_ni_syscall(struct pt_regs *regs) 
	}

#endif



	if (show_unhandled_signals_ratelimited()) {

		pr_info("%s[%d]: syscall %d\n", current->comm,

			task_pid_nr(current), (int)regs->syscallno);

		dump_instr("", regs);

		if (user_mode(regs))

			__show_regs(regs);

	}



	return sys_ni_syscall();

}