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Thu, 19 Dec 2019 07:15:08 -0800 (PST) Date: Thu, 19 Dec 2019 07:15:08 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d99340059a100686@google.com> Subject: BUG: unable to handle kernel paging request in xfs_sb_quiet_read_verify From: syzbot To: akpm@linux-foundation.org, allison.henderson@oracle.com, aryabinin@virtuozzo.com, bfoster@redhat.com, darrick.wong@oracle.com, dchinner@redhat.com, dja@axtens.net, dvyukov@google.com, linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, sandeen@redhat.com, syzkaller-bugs@googlegroups.com, torvalds@linux-foundation.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 2187f215 Merge tag 'for-5.5-rc2-tag' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11059951e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=ab2ae0615387ef78 dashboard link: https://syzkaller.appspot.com/bug?extid=4722bf4c6393b73a792b compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12727c71e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12ff5151e00000 The bug was bisected to: commit 0609ae011deb41c9629b7f5fd626dfa1ac9d16b0 Author: Daniel Axtens Date: Sun Dec 1 01:55:00 2019 +0000 x86/kasan: support KASAN_VMALLOC bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=161240aee00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=151240aee00000 console output: https://syzkaller.appspot.com/x/log.txt?x=111240aee00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+4722bf4c6393b73a792b@syzkaller.appspotmail.com Fixes: 0609ae011deb ("x86/kasan: support KASAN_VMALLOC") BUG: unable to handle page fault for address: fffff52000680000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 21ffee067 P4D 21ffee067 PUD aa51c067 PMD a85e1067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3088 Comm: kworker/1:2 Not tainted 5.5.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: xfs-buf/loop0 xfs_buf_ioend_work RIP: 0010:xfs_sb_quiet_read_verify+0x47/0xc0 fs/xfs/libxfs/xfs_sb.c:735 Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 7f 49 8b 9c 24 30 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 50 8b 1b bf 58 46 53 42 89 de e8 RSP: 0018:ffffc90008187cc0 EFLAGS: 00010a06 RAX: dffffc0000000000 RBX: ffffc90003400000 RCX: ffffffff82ad3c26 RDX: 1ffff92000680000 RSI: ffffffff82aa0a0f RDI: ffff8880a2cdba70 RBP: ffffc90008187cd0 R08: ffff88809eb6c500 R09: ffffed1015d2703d R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a2cdb940 R13: ffff8880a2cdb95c R14: ffff8880a2cdbb74 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52000680000 CR3: 000000009f5ab000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: xfs_buf_ioend+0x3f9/0xde0 fs/xfs/xfs_buf.c:1162 xfs_buf_ioend_work+0x19/0x20 fs/xfs/xfs_buf.c:1183 process_one_work+0x9af/0x1740 kernel/workqueue.c:2264 worker_thread+0x98/0xe40 kernel/workqueue.c:2410 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Modules linked in: CR2: fffff52000680000 ---[ end trace 744ceb50d377bf94 ]--- RIP: 0010:xfs_sb_quiet_read_verify+0x47/0xc0 fs/xfs/libxfs/xfs_sb.c:735 Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 7f 49 8b 9c 24 30 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 50 8b 1b bf 58 46 53 42 89 de e8 RSP: 0018:ffffc90008187cc0 EFLAGS: 00010a06 RAX: dffffc0000000000 RBX: ffffc90003400000 RCX: ffffffff82ad3c26 RDX: 1ffff92000680000 RSI: ffffffff82aa0a0f RDI: ffff8880a2cdba70 RBP: ffffc90008187cd0 R08: ffff88809eb6c500 R09: ffffed1015d2703d R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a2cdb940 R13: ffff8880a2cdb95c R14: ffff8880a2cdbb74 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52000680000 CR3: 000000009f5ab000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches