Hello, syzbot found the following issue on:
HEAD commit: d1d2220c Add linux-next specific files for 20200924 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15b1918d900000 kernel config: https://syzkaller.appspot.com/x/.config?x=254e028a642027c dashboard link: https://syzkaller.appspot.com/bug?extid=e7eea402700c6db193be compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e7eea402700c6db19...@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 28162 at kernel/kthread.c:547 kthread_park+0x17c/0x1b0 kernel/kthread.c:547 Modules linked in: CPU: 1 PID: 28162 Comm: syz-executor.3 Not tainted 5.9.0-rc6-next-20200924-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kthread_park+0x17c/0x1b0 kernel/kthread.c:547 Code: 2a 04 27 00 0f 0b e9 fb fe ff ff e8 1e 04 27 00 0f 0b e8 17 04 27 00 41 bc da ff ff ff 5b 44 89 e0 5d 41 5c c3 e8 04 04 27 00 <0f> 0b 41 bc f0 ff ff ff eb be e8 f5 03 27 00 0f 0b eb b2 e8 bc 74 RSP: 0018:ffffc90017ebfd50 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888092c0ca00 RCX: ffffffff814e2ccf RDX: ffff88804f30a040 RSI: ffffffff814e2d6c RDI: 0000000000000007 RBP: ffff88804f46c440 R08: 0000000000000000 R09: ffff888092c0ca07 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: ffff888096f7d000 R15: 0000000000000000 FS: 0000000002a7e940(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001590004 CR3: 000000020a32f000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: io_sq_thread_park fs/io_uring.c:7145 [inline] io_sq_thread_park fs/io_uring.c:7139 [inline] io_uring_flush+0x10a6/0x1640 fs/io_uring.c:8596 filp_close+0xb4/0x170 fs/open.c:1276 __close_fd+0x2f/0x50 fs/file.c:671 __do_sys_close fs/open.c:1295 [inline] __se_sys_close fs/open.c:1293 [inline] __x64_sys_close+0x69/0x100 fs/open.c:1293 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417901 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 a4 1a 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fffe4c281e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000417901 RDX: 0000000000000000 RSI: ffffffff8840e309 RDI: 0000000000000003 RBP: 0000000000000001 R08: ffffffff8134e496 R09: 0000000092f8bb6d R10: 00007fffe4c282d0 R11: 0000000000000293 R12: 000000000118d9c0 R13: 000000000118d9c0 R14: ffffffffffffffff R15: 000000000118cf4c --- 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 syzkal...@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
