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mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy
commit6ac1dc736b
upstream. Setting si_code to 0 is the same a setting si_code to SI_USER which is definitely not correct. With si_code set to SI_USER si_pid and si_uid will be copied to userspace instead of si_addr. Which is very wrong. So fix this by using a sensible si_code (SEGV_MAPERR) for this failure. Fixes:b920de1b77
("mn10300: add the MN10300/AM33 architecture to the kernel") Cc: David Howells <dhowells@redhat.com> Cc: Masakazu Urade <urade.masakazu@jp.panasonic.com> Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -437,7 +437,7 @@ asmlinkage void misalignment(struct pt_regs *regs, enum exception_code code)
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info.si_signo = SIGSEGV;
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info.si_errno = 0;
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info.si_code = 0;
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info.si_code = SEGV_MAPERR;
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info.si_addr = (void *) regs->pc;
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force_sig_info(SIGSEGV, &info, current);
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return;
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