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Wed, 01 Sep 2021 06:26:22 -0700 (PDT) Date: Wed, 01 Sep 2021 06:26:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002b577805caef03d8@google.com> Subject: [syzbot] WARNING in futex_requeue From: syzbot To: dave@stgolabs.net, dvhart@infradead.org, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: b91db6a0b52e Merge tag 'for-5.15/io_uring-vfs-2021-08-30' .. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17907235300000 kernel config: https://syzkaller.appspot.com/x/.config?x=961d30359ac81f8c dashboard link: https://syzkaller.appspot.com/bug?extid=4d1bd0725ef09168e1a0 compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.1 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1222185d300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4d1bd0725ef09168e1a0@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5701 at kernel/futex.c:2259 futex_requeue+0x1467/0x2d50 kernel/futex.c:2259 Modules linked in: CPU: 1 PID: 5701 Comm: syz-executor.0 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:futex_requeue+0x1467/0x2d50 kernel/futex.c:2259 Code: 02 00 00 4c 8d 84 24 90 02 00 00 e8 63 6a 00 00 41 89 c7 31 ff 89 c6 e8 a7 4d 0c 00 45 85 ff 0f 84 d8 13 00 00 e8 89 49 0c 00 <0f> 0b eb 05 e8 80 49 0c 00 4c 89 fb 89 df 48 c7 c6 70 7c 73 8c e8 RSP: 0018:ffffc90001d5f640 EFLAGS: 00010293 RAX: ffffffff8174a337 RBX: 0000000000000df3 RCX: ffff888020e7b880 RDX: 0000000000000000 RSI: 00000000fffffffd RDI: 0000000000000000 RBP: ffffc90001d5f948 R08: ffffffff8174a329 R09: ffffed1005174a9e R10: ffffed1005174a9e R11: 0000000000000000 R12: 0000000020048000 R13: dffffc0000000000 R14: 0000000000000000 R15: 00000000fffffffd FS: 00007f4d7080c700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd72dab690 CR3: 000000001cf4d000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_futex+0x1b87/0x32b0 kernel/futex.c:3958 __do_sys_futex kernel/futex.c:4009 [inline] __se_sys_futex+0x11c/0x4d0 kernel/futex.c:3990 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4d7080c188 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665f9 RDX: 0000000000000001 RSI: 000000000000000c RDI: 000000002000cffc RBP: 00000000004bfcc4 R08: 0000000020048000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007fff6069004f R14: 00007f4d7080c300 R15: 0000000000022000 --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches