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authorDmitry V. Levin <ldv@altlinux.org>2018-04-13 17:19:02 +0300
committerEric W. Biederman <ebiederm@xmission.com>2018-04-20 00:39:39 +0300
commit32772c9e2e8b0f9bf4ae0d70eb3c9d8c40d5de22 (patch)
treea980a4fb674320919ded78d43d2277a74aa62db8 /arch/sparc/include/uapi
parent5278c0e8146a77249372295b9cf5b9fcb24492a8 (diff)
downloadlinux-32772c9e2e8b0f9bf4ae0d70eb3c9d8c40d5de22.tar.xz
sparc: fix compat siginfo ABI regression
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 commit 266da65e9156d93e1126e185259a4aae68188d0e. 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: cc731525f26a ("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>
Diffstat (limited to 'arch/sparc/include/uapi')
-rw-r--r--arch/sparc/include/uapi/asm/siginfo.h7
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/sparc/include/uapi/asm/siginfo.h b/arch/sparc/include/uapi/asm/siginfo.h
index 896ce447d16a..e7049550ac82 100644
--- a/arch/sparc/include/uapi/asm/siginfo.h
+++ b/arch/sparc/include/uapi/asm/siginfo.h
@@ -18,13 +18,6 @@
#define SI_NOINFO 32767 /* no information in siginfo_t */
/*
- * SIGFPE si_codes
- */
-#ifdef __KERNEL__
-#define FPE_FIXME 0 /* Broken dup of SI_USER */
-#endif /* __KERNEL__ */
-
-/*
* SIGEMT si_codes
*/
#define EMT_TAGOVF 1 /* tag overflow */