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Thu, 25 Jun 2020 12:02:10 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4ACA1A4051; Thu, 25 Jun 2020 12:03:29 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 09C3EA4053; Thu, 25 Jun 2020 12:03:29 +0000 (GMT) Received: from osiris (unknown [9.171.78.96]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Thu, 25 Jun 2020 12:03:28 +0000 (GMT) Date: Thu, 25 Jun 2020 14:03:27 +0200 From: Heiko Carstens To: Linus Torvalds Cc: Vasily Gorbik , Christian Borntraeger , linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Subject: [GIT PULL] s390 updates for 5.8-rc3 Message-ID: <20200625120327.GA7638@osiris> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-25_05:2020-06-25,2020-06-25 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=587 malwarescore=0 priorityscore=1501 impostorscore=0 spamscore=0 bulkscore=0 cotscore=-2147483648 mlxscore=0 clxscore=1011 lowpriorityscore=0 suspectscore=2 phishscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006250078 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Linus, please pull s390 updates for 5.8-rc3 Thanks, Heiko The following changes since commit 48778464bb7d346b47157d21ffde2af6b2d39110: Linux 5.8-rc2 (2020-06-21 15:45:29 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git tags/s390-5.8-3 for you to fetch changes up to 827c4913923e0b441ba07ba4cc41e01181102303: s390/debug: avoid kernel warning on too large number of pages (2020-06-23 14:05:55 +0200) ---------------------------------------------------------------- s390 fixes for 5.8-rc3 - Fix kernel crash on system call single stepping. - Make sure early program check handler is executed with DAT on to avoid an endless program check loop. - Add __GFP_NOWARN flag to debug feature to avoid user triggerable allocation failure messages. ---------------------------------------------------------------- Christian Borntraeger (1): s390/debug: avoid kernel warning on too large number of pages Sven Schnelle (1): s390: fix system call single stepping Vasily Gorbik (1): s390/kasan: fix early pgm check handler execution arch/s390/kernel/debug.c | 3 ++- arch/s390/kernel/early.c | 2 ++ arch/s390/kernel/entry.S | 2 +- 3 files changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c index 636446003a06..263075a1af36 100644 --- a/arch/s390/kernel/debug.c +++ b/arch/s390/kernel/debug.c @@ -198,9 +198,10 @@ static debug_entry_t ***debug_areas_alloc(int pages_per_area, int nr_areas) if (!areas) goto fail_malloc_areas; for (i = 0; i < nr_areas; i++) { + /* GFP_NOWARN to avoid user triggerable WARN, we handle fails */ areas[i] = kmalloc_array(pages_per_area, sizeof(debug_entry_t *), - GFP_KERNEL); + GFP_KERNEL | __GFP_NOWARN); if (!areas[i]) goto fail_malloc_areas2; for (j = 0; j < pages_per_area; j++) { diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index cd241ee66eff..078277231858 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -170,6 +170,8 @@ static noinline __init void setup_lowcore_early(void) psw_t psw; psw.mask = PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA; + if (IS_ENABLED(CONFIG_KASAN)) + psw.mask |= PSW_MASK_DAT; psw.addr = (unsigned long) s390_base_ext_handler; S390_lowcore.external_new_psw = psw; psw.addr = (unsigned long) s390_base_pgm_handler; diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 496f74d98473..969b35b177dd 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -378,9 +378,9 @@ ENTRY(system_call) stmg %r8,%r15,__LC_SAVE_AREA_SYNC BPOFF lg %r12,__LC_CURRENT - lghi %r13,__TASK_thread lghi %r14,_PIF_SYSCALL .Lsysc_per: + lghi %r13,__TASK_thread lg %r15,__LC_KERNEL_STACK la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs UPDATE_VTIME %r8,%r9,__LC_SYNC_ENTER_TIMER