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([2a0b:e7c0:0:107::70f]) by smtp.gmail.com with ESMTPSA id i2sm8126631edk.30.2020.07.17.03.45.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 17 Jul 2020 03:45:55 -0700 (PDT) To: Oleg Nesterov , christian@brauner.io, "Eric W. Biederman" , Linux kernel mailing list From: Jiri Slaby Subject: 5.8-rc*: kernel BUG at kernel/signal.c:1917 Message-ID: <6b253b55-586d-0bc4-9f58-c45c631abc60@kernel.org> Date: Fri, 17 Jul 2020 12:45:54 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, the strace testsuite triggers this on 5.8-rc4 and -rc5 both on x86_64 and i586: > kernel BUG at kernel/signal.c:1917! > invalid opcode: 0000 [#1] SMP NOPTI > CPU: 7 PID: 18367 Comm: filter-unavaila Not tainted 5.8.0-rc4-3.g2cd7849-default #1 openSUSE Tumbleweed (unreleased) > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba527-rebuilt.opensuse.org 04/01/2014 > RIP: 0010:do_notify_parent+0x239/0x270 > Code: d1 e8 41 89 c5 41 83 e5 01 48 8b 95 28 05 00 00 45 31 c0 4c 89 f6 44 89 e7 b9 01 00 00 00 e8 ce f2 ff ff e9 5b ff ff ff 0f 0b <0f> 0b 48 39 bf 50 05 00 00 75 17 48 8b 97 c0 05 00 00 48 8d 87 c0 > RSP: 0018:ffffa05400f93d00 EFLAGS: 00010002 > RAX: 0000000000000008 RBX: ffff9024ebb6dd00 RCX: 00000000000102f9 > RDX: 0000000000000000 RSI: 0000000000000011 RDI: ffff9024ebb6dd00 > RBP: ffff9024ebb6dd00 R08: 0000000000000000 R09: 000000000000000d > R10: 00007f7813000000 R11: ffffc2690721ae80 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000009 R15: 0000000000000000 > FS: 00007f7812ffc700(0000) GS:ffff902537dc0000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f9c246a4a10 CR3: 00000001eba7c000 CR4: 00000000000406e0 > Call Trace: > exit_notify+0x1c0/0x1f0 > do_exit+0x234/0x430 > do_group_exit+0x33/0xa0 > get_signal+0x171/0x640 > do_signal+0x2a/0x1c0 > exit_to_usermode_loop+0x89/0x110 > __prepare_exit_to_usermode+0x92/0xd0 > do_syscall_64+0x59/0xd0 > entry_SYSCALL_64_after_hwframe+0x44/0xa9 > RIP: 0033:0x7f78149db992 > Code: Bad RIP value. > RSP: 002b:00007f7812ffbed0 EFLAGS: 00000293 ORIG_RAX: 0000000000000022 > RAX: fffffffffffffdfe RBX: 0000000000000000 RCX: 00007f78149db992 > RDX: 0000000000000001 RSI: 0000558a4e07e033 RDI: 0000000000000000 > RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f7812ffc700 > R10: 00007f7812ffc9d0 R11: 0000000000000293 R12: 0000000000000000 > R13: 00007ffe4853b4bf R14: 00007ffe4853b4c0 R15: 00007f7812ffc700 > Modules linked in: ata_generic ata_piix qemu_fw_cfg e1000 nls_iso8859_1 nls_cp437 vfat fat virtio_blk virtio_mmio xfs btrfs blake2b_generic xor raid6_pq libcrc32c crc32c_intel reiserfs squashfs fuse dm_snapshot dm_bufio dm_crypt dm_mod binfmt_misc loop sg virtio_rng > ---[ end trace 364c3385f192fee3 ]--- Any ideas? thanks, -- js suse labs