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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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32772c9e2e
Starting with commit v4.14-rc1~60^2^2~1, a SIGFPE signal sent via kill results to wrong values in si_pid and si_uid fields of compat siginfo_t. This happens due to FPE_FIXME being defined to 0 for sparc, and at the same time siginfo_layout() introduced by the same commit returns SIL_FAULT for SIGFPE if si_code == SI_USER and FPE_FIXME is defined to 0. Fix this regression by removing FPE_FIXME macro and changing all its users to assign FPE_FLTUNK to si_code instead of FPE_FIXME. Note that FPE_FLTUNK is a new macro introduced by commit266da65e91. Tested with commit v4.16-11958-g16e205cf42da. This bug was found by strace test suite. In the discussion about FPE_FLTUNK on sparc David Miller said: > Eric, feel free to do something similar on Sparc. Link: https://github.com/strace/strace/issues/21 Fixes:cc731525f2("signal: Remove kernel interal si_code magic") Fixes: 2.3.41 Cc: David Miller <davem@davemloft.net> Cc: sparclinux@vger.kernel.org Conceptually-Acked-By: David Miller <davem@davemloft.net> Thanks-to: Anatoly Pugachev <matorola@gmail.com> Signed-off-by: Dmitry V. Levin <ldv@altlinux.org> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
27 lines
553 B
C
27 lines
553 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI__SPARC_SIGINFO_H
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#define _UAPI__SPARC_SIGINFO_H
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#if defined(__sparc__) && defined(__arch64__)
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#define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int))
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#define __ARCH_SI_BAND_T int
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#endif /* defined(__sparc__) && defined(__arch64__) */
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#define __ARCH_SI_TRAPNO
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#include <asm-generic/siginfo.h>
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#define SI_NOINFO 32767 /* no information in siginfo_t */
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/*
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* SIGEMT si_codes
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*/
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#define EMT_TAGOVF 1 /* tag overflow */
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#define NSIGEMT 1
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#endif /* _UAPI__SPARC_SIGINFO_H */
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