Created attachment 1501488 [details]
File: backtrace

Created attachment 1501489 [details]
File: cgroup

Created attachment 1501490 [details]
File: core_backtrace

Created attachment 1501491 [details]
File: dso_list

Created attachment 1501492 [details]
File: limits

Created attachment 1501493 [details]
File: proc_pid_status

These operations work as expected:

# eject -v /dev/sdc
eject: device name is `/dev/sdc'
eject: /dev/sdc: not mounted
eject: /dev/sdc: is whole-disk device
eject: /dev/sdc: trying to eject using CD-ROM eject command
eject: CD-ROM eject command failed
eject: /dev/sdc: trying to eject using SCSI commands
eject: SCSI eject succeeded

# eject -v -t /dev/sdc
eject: device name is `/dev/sdc'
eject: /dev/sdc: not mounted
eject: /dev/sdc: is whole-disk device
eject: /dev/sdc: closing tray

# lsusb -v -d 0781:5583

Bus 004 Device 002: ID 0781:5583 SanDisk Corp. Ultra Fit
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               3.00
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         9
  idVendor           0x0781 SanDisk Corp.
  idProduct          0x5583 Ultra Fit
  bcdDevice            1.00
  iManufacturer           1 SanDisk
  iProduct                2 Ultra Fit
  iSerial                 3 4C530001210512121060
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           44
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              896mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst              15
Binary Object Store Descriptor:
  bLength                 5
  bDescriptorType        15
  wTotalLength           22
  bNumDeviceCaps          2
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x00000002
      HIRD Link Power Management (LPM) Supported
  SuperSpeed USB Device Capability:
    bLength                10
    bDescriptorType        16
    bDevCapabilityType      3
    bmAttributes         0x00
    wSpeedsSupported   0x000e
      Device can operate at Full Speed (12Mbps)
      Device can operate at High Speed (480Mbps)
      Device can operate at SuperSpeed (5Gbps)
    bFunctionalitySupport   1
      Lowest fully-functional device speed is Full Speed (12Mbps)
    bU1DevExitLat          10 micro seconds
    bU2DevExitLat         256 micro seconds
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x000c
  (Bus Powered)
  U1 Enabled
  U2 Enabled

Reproduced with a different USB flash drive in a different port:

# lsusb -d 13fe:3800
Bus 003 Device 003: ID 13fe:3800 Kingston Technology Company Inc. Rage XT Flash Drive

# lsblk /dev/sdc
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sdc      8:32   1  7.5G  0 disk 
└─sdc1   8:33   1  1.5G  0 part

# strace eject -v -T /dev/sdc
...
write(1, "eject: /dev/sdc: toggling tray\n", 31eject: /dev/sdc: toggling tray
) = 31
openat(AT_FDCWD, "/dev/sdc", O_RDWR|O_NONBLOCK) = 3
ioctl(3, CDROM_DRIVE_STATUS, 0x802)     = -1 EINVAL (Invalid argument)
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
...

It seems eject's reaction to invalid ioctl is pretty crazy in this case:

        switch (ioctl(fd, CDROM_DRIVE_STATUS)) {
           ...
        default:
                abort();
        }    

... any error message and exit() would be better than abort().

Thanks for your report.


Fixed by upstream commit a6f99be44796086c73c03a91464407a2ff74dadd.

(In reply to Karel Zak from comment #11)
...
> Fixed by upstream commit a6f99be44796086c73c03a91464407a2ff74dadd.

Thanks, Karel:
https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/commit/sys-utils/eject.c?id=a6f99be44796086c73c03a91464407a2ff74dadd

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