hfs: can't find a HFS filesystem on dev loop5 ================================================================== BUG: KCSAN: data-race in exit_signals / kthread_unpark write to 0xffff8880a0d73064 of 4 bytes by task 30917 on cpu 1: exit_signals+0x13b/0x490 kernel/signal.c:2822 do_exit+0x18b/0x18f0 kernel/exit.c:763 kthread+0x17f/0x200 drivers/block/aoe/aoecmd.c:1242 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 read to 0xffff8880a0d73064 of 4 bytes by task 30915 on cpu 0: to_kthread kernel/kthread.c:75 [inline] kthread_unpark+0x24/0xe0 kernel/kthread.c:474 kthread_stop+0x97/0x2d0 kernel/kthread.c:557 loop_unprepare_queue drivers/block/loop.c:883 [inline] __loop_clr_fd+0x3ad/0x720 drivers/block/loop.c:1145 loop_clr_fd drivers/block/loop.c:1224 [inline] lo_ioctl+0x24c/0xc80 drivers/block/loop.c:1593 __blkdev_driver_ioctl block/ioctl.c:304 [inline] blkdev_ioctl+0x979/0x1160 block/ioctl.c:606 block_ioctl+0x95/0xc0 fs/block_dev.c:1954 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x991/0xc60 fs/ioctl.c:696 ksys_ioctl+0xbd/0xe0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x4c/0x60 fs/ioctl.c:718 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 30915 Comm: syz-executor.5 Not tainted 5.4.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================