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arm64: Remove unimplemented syscall log message

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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: Will Deacon <will.deacon@arm.com>
Signed-off-by: Michael Weiser <michael.weiser@gmx.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Michael Weiser 2018-02-01 23:13:36 +01:00 committed by Will Deacon
parent 5ee39a71fd
commit 1962682d2b
1 changed files with 0 additions and 8 deletions
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8
arch/arm64/kernel/traps.c
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@ -526,14 +526,6 @@ 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), regs->syscallno);
dump_instr("", regs);
if (user_mode(regs))
__show_regs(regs);
}
return sys_ni_syscall();
}