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Wed, 13 Feb 2019 09:56:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=tGpGGv9zZPSYd1bawqbNQ+HgCFaseK+m9nbLFgTQS/k=; b=rXmNHdpdON3Q3wxa5JsWjD1RcMkzxSN+BOrnAdfWbPyXNEJ/cjyP2F7TPPEosqWHWD KS85/VGCyXqp9VbSRF+Yu5CJUTfVMaI+PmD+SwldVaYoxd7ofqNPt4gzROXROmu1I78K vpWHYWTAxswOIPZhPkUFV5Uixh7l6UUw044iDRquvJ/LgQyexyMQVwzAOODi4bi5g12P edXeFZE7KAXKlXJk396zl3lN9GxtAHyDxbRK2U62sJAVW80X/FD0sRKwKBYb4vtdIDEl 1kGZTc/johLtBLKhCYSpFnFmG4tnkFZBqSlpndz7yhs0SWJTXPrHWXj1oxL/RdAVLa6B lJag== X-Gm-Message-State: AHQUAubN3J5EAbLlOgDUvT5oY7Ba8Q6ss7Ifq8bLP5o7DHi5eeKE03Xp LHzzT8DIy6c7sxpraUc8E6iZFqlILPtZizXIWWQ36/gyqPLJ X-Google-Smtp-Source: AHgI3IYlS2NNcvSkEFyhiWkWuB1SpsLZPUaTYv4wgqwXTgMNfuhmJwGh2/8ElzFKHBUHzGJISgoHEvg8v3snZHXPN50689bvw1bo MIME-Version: 1.0 X-Received: by 2002:a6b:510c:: with SMTP id f12mr1272016iob.16.1550080564397; Wed, 13 Feb 2019 09:56:04 -0800 (PST) Date: Wed, 13 Feb 2019 09:56:04 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006a12bd0581ca4145@google.com> Subject: BUG: Bad page state (5) From: syzbot To: akpm@linux-foundation.org, dan.j.williams@intel.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, nborisov@suse.com, rppt@linux.vnet.ibm.com, shakeelb@google.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, willy@infradead.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: c4f3ef3eb53f Add linux-next specific files for 20190213 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1130a124c00000 kernel config: https://syzkaller.appspot.com/x/.config?x=9ec67976eb2df882 dashboard link: https://syzkaller.appspot.com/bug?extid=2cd2887ea471ed6e6995 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14ecdaa8c00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12ebe178c00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+2cd2887ea471ed6e6995@syzkaller.appspotmail.com BUG: Bad page state in process udevd pfn:472f0 name:"memfd:" page:ffffea00011cbc00 count:0 mapcount:0 mapping:ffff88800df2ad40 index:0xf shmem_aops flags: 0x1fffc000008000c(uptodate|dirty|swapbacked) raw: 01fffc000008000c ffffea0000ac4f08 ffff8880a85af890 ffff88800df2ad40 raw: 000000000000000f 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: non-NULL mapping Modules linked in: CPU: 1 PID: 7586 Comm: udevd Not tainted 5.0.0-rc6-next-20190213 #34 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 bad_page.cold+0xda/0xff mm/page_alloc.c:586 free_pages_check_bad+0x142/0x1a0 mm/page_alloc.c:1014 free_pages_check mm/page_alloc.c:1023 [inline] free_pages_prepare mm/page_alloc.c:1113 [inline] free_pcp_prepare mm/page_alloc.c:1138 [inline] free_unref_page_prepare mm/page_alloc.c:2991 [inline] free_unref_page_list+0x31d/0xc40 mm/page_alloc.c:3060 name:"memfd:" release_pages+0x60d/0x1940 mm/swap.c:791 pagevec_lru_move_fn+0x218/0x2a0 mm/swap.c:213 __pagevec_lru_add mm/swap.c:917 [inline] lru_add_drain_cpu+0x2f7/0x520 mm/swap.c:581 lru_add_drain+0x20/0x60 mm/swap.c:652 exit_mmap+0x290/0x530 mm/mmap.c:3134 __mmput kernel/fork.c:1047 [inline] mmput+0x15f/0x4c0 kernel/fork.c:1068 exec_mmap fs/exec.c:1046 [inline] flush_old_exec+0x8d9/0x1c20 fs/exec.c:1279 load_elf_binary+0x9bc/0x53f0 fs/binfmt_elf.c:864 search_binary_handler fs/exec.c:1656 [inline] search_binary_handler+0x17f/0x570 fs/exec.c:1634 exec_binprm fs/exec.c:1698 [inline] __do_execve_file.isra.0+0x1394/0x23f0 fs/exec.c:1818 do_execveat_common fs/exec.c:1865 [inline] do_execve fs/exec.c:1882 [inline] __do_sys_execve fs/exec.c:1958 [inline] __se_sys_execve fs/exec.c:1953 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1953 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc7001ba207 Code: Bad RIP value. RSP: 002b:00007ffe06aa13b8 EFLAGS: 00000206 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fc7001ba207 RDX: 0000000001fd5fd0 RSI: 00007ffe06aa14b0 RDI: 00007ffe06aa24c0 RBP: 0000000000625500 R08: 0000000000001c49 R09: 0000000000001c49 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000001fd5fd0 R13: 0000000000000007 R14: 0000000001fc6250 R15: 0000000000000005 BUG: Bad page state in process udevd pfn:2b13c page:ffffea0000ac4f00 count:0 mapcount:0 mapping:ffff88800df2ad40 index:0xe shmem_aops flags: 0x1fffc000008000c(uptodate|dirty|swapbacked) raw: 01fffc000008000c ffff8880a85af890 ffff8880a85af890 ffff88800df2ad40 raw: 000000000000000e 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: non-NULL mapping Modules linked in: CPU: 1 PID: 7586 Comm: udevd Tainted: G B 5.0.0-rc6-next-20190213 #34 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 bad_page.cold+0xda/0xff mm/page_alloc.c:586 name:"memfd:" free_pages_check_bad+0x142/0x1a0 mm/page_alloc.c:1014 free_pages_check mm/page_alloc.c:1023 [inline] free_pages_prepare mm/page_alloc.c:1113 [inline] free_pcp_prepare mm/page_alloc.c:1138 [inline] free_unref_page_prepare mm/page_alloc.c:2991 [inline] free_unref_page_list+0x31d/0xc40 mm/page_alloc.c:3060 release_pages+0x60d/0x1940 mm/swap.c:791 pagevec_lru_move_fn+0x218/0x2a0 mm/swap.c:213 __pagevec_lru_add mm/swap.c:917 [inline] lru_add_drain_cpu+0x2f7/0x520 mm/swap.c:581 lru_add_drain+0x20/0x60 mm/swap.c:652 exit_mmap+0x290/0x530 mm/mmap.c:3134 __mmput kernel/fork.c:1047 [inline] mmput+0x15f/0x4c0 kernel/fork.c:1068 exec_mmap fs/exec.c:1046 [inline] flush_old_exec+0x8d9/0x1c20 fs/exec.c:1279 load_elf_binary+0x9bc/0x53f0 fs/binfmt_elf.c:864 search_binary_handler fs/exec.c:1656 [inline] search_binary_handler+0x17f/0x570 fs/exec.c:1634 exec_binprm fs/exec.c:1698 [inline] __do_execve_file.isra.0+0x1394/0x23f0 fs/exec.c:1818 do_execveat_common fs/exec.c:1865 [inline] do_execve fs/exec.c:1882 [inline] __do_sys_execve fs/exec.c:1958 [inline] __se_sys_execve fs/exec.c:1953 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1953 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc7001ba207 Code: Bad RIP value. RSP: 002b:00007ffe06aa13b8 EFLAGS: 00000206 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fc7001ba207 RDX: 0000000001fd5fd0 RSI: 00007ffe06aa14b0 RDI: 00007ffe06aa24c0 RBP: 0000000000625500 R08: 0000000000001c49 R09: 0000000000001c49 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000001fd5fd0 R13: 0000000000000007 R14: 0000000001fc6250 R15: 0000000000000005 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches