https://bugzilla.kernel.org/show_bug.cgi?id=207877 Bug ID: 207877 Summary: ASMedia drive (174c:55aa) hangs in ioctl CDROM_DRIVE_STATUS when mounting a DVD Product: IO/Storage Version: 2.5 Kernel Version: 5.6.14-arch1-1 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: SCSI Assignee: linux-scsi@xxxxxxxxxxxxxxx Reporter: zfigura@xxxxxxxxxxxxxxx Regression: No Created attachment 289267 --> https://bugzilla.kernel.org/attachment.cgi?id=289267&action=edit dmesg including backtrace of hang The device has USB vendor/product 174c:55aa, and is described by its USB product string as "ASM1051E SATA 6Gb/s bridge, ASM1053E SATA 6Gb/s bridge, ASM1153 SATA 3Gb/s bridge, ASM1153E SATA 6Gb/s bridge". When attempting to mount via "mount /dev/sr0 /mnt", strace shows the following sequence (tail of log): openat(AT_FDCWD, "/dev/sr0", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = 3 fadvise64(3, 0, 0, POSIX_FADV_RANDOM) = 0 fstat(3, {st_mode=S_IFBLK|0660, st_rdev=makedev(0xb, 0), ...}) = 0 ioctl(3, BLKGETSIZE64, [8351399936]) = 0 openat(AT_FDCWD, "/sys/dev/block/11:0", O_RDONLY|O_CLOEXEC) = 4 openat(4, "dm/uuid", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) close(4) = 0 openat(AT_FDCWD, "/sys/dev/block/11:0", O_RDONLY|O_CLOEXEC) = 4 faccessat(4, "partition", F_OK) = -1 ENOENT (No such file or directory) openat(4, "dm/uuid", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) close(4) = 0 ioctl(3, CDROM_GET_CAPABILITY, 0) = 2227183 ioctl(3, CDROM_DRIVE_STATUS The last ioctl hangs in the kernel forever. mount cannot be killed even with SIGKILL. dmesg shows a hang in multiple kernel thread which has been attached. This problem occurs with at least one DVD I have tested, but I was able to successfully mount, access, and unmount another CD-ROM. -- You are receiving this mail because: You are the assignee for the bug.
