[syzbot] [usb?] memory leak in gadget_bind (2)

syzbot <[email protected]>
Newsgroups org.kernel.vger.linux-usb,org.kernel.vger.linux-kernel
Message-ID <[email protected]> 
Hello,

syzbot found the following issue on:

HEAD commit:    06cf61899d64 Merge tag 'x86-urgent-2026-08-08' of git://gi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16254079580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6843f8fd2336602d
dashboard link: https://syzkaller.appspot.com/bug?extid=d83b3c49738aea97c0e5
compiler:       gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11254079580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1048ffb9580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e023ff6ad9bc/disk-06cf6189.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ea49527ba5df/vmlinux-06cf6189.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e3d6468d0490/bzImage-06cf6189.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]

BUG: memory leak
unreferenced object 0xffff88812a3ea300 (size 128):
  comm "syz.0.17", pid 6069, jiffies 4294943967
  hex dump (first 32 bytes):
    00 a3 3e 2a 81 88 ff ff 00 a3 3e 2a 81 88 ff ff  ..>*......>*....
    30 40 49 03 81 88 ff ff 00 00 00 00 00 00 00 00  0@I.............
  backtrace (crc a802af15):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4597 [inline]
    slab_alloc_node mm/slub.c:4917 [inline]
    __kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5485
    _kmalloc_noprof include/linux/slab.h:988 [inline]
    _kzalloc_noprof include/linux/slab.h:1309 [inline]
    dummy_alloc_request+0x65/0xf0 drivers/usb/gadget/udc/dummy_hcd.c:693
    usb_ep_alloc_request+0x2e/0xd0 drivers/usb/gadget/udc/core.c:197
    gadget_bind+0x67/0x230 drivers/usb/gadget/legacy/raw_gadget.c:294
    gadget_bind_driver+0xed/0x390 drivers/usb/gadget/udc/core.c:1662
    call_driver_probe drivers/base/dd.c:628 [inline]
    really_probe+0x12f/0x3a0 drivers/base/dd.c:706
    __driver_probe_device+0xe9/0x1a0 drivers/base/dd.c:868
    driver_probe_device+0x28/0xf0 drivers/base/dd.c:898
    __driver_attach drivers/base/dd.c:1292 [inline]
    __driver_attach+0x10a/0x200 drivers/base/dd.c:1232
    bus_for_each_dev+0xb8/0x120 drivers/base/bus.c:383
    bus_add_driver+0x122/0x280 drivers/base/bus.c:763
    driver_register+0xb1/0x140 drivers/base/driver.c:174
    usb_gadget_register_driver_owner+0x69/0xe0 drivers/usb/gadget/udc/core.c:1752
    raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:596 [inline]
    raw_ioctl+0xad7/0x10c0 drivers/usb/gadget/legacy/raw_gadget.c:1307
    vfs_ioctl fs/ioctl.c:51 [inline]
    __do_sys_ioctl fs/ioctl.c:597 [inline]
    __se_sys_ioctl fs/ioctl.c:583 [inline]
    __x64_sys_ioctl+0xf4/0x140 fs/ioctl.c:583
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94

BUG: memory leak
unreferenced object 0xffff888127815480 (size 128):
  comm "syz.6.23", pid 6074, jiffies 4294944011
  hex dump (first 32 bytes):
    80 54 81 27 81 88 ff ff 80 54 81 27 81 88 ff ff  .T.'.....T.'....
    30 40 49 03 81 88 ff ff 00 00 00 00 00 00 00 00  0@I.............
  backtrace (crc fd9d10f8):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4597 [inline]
    slab_alloc_node mm/slub.c:4917 [inline]
    __kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5485
    _kmalloc_noprof include/linux/slab.h:988 [inline]
    _kzalloc_noprof include/linux/slab.h:1309 [inline]
    dummy_alloc_request+0x65/0xf0 drivers/usb/gadget/udc/dummy_hcd.c:693
    usb_ep_alloc_request+0x2e/0xd0 drivers/usb/gadget/udc/core.c:197
    gadget_bind+0x67/0x230 drivers/usb/gadget/legacy/raw_gadget.c:294
    gadget_bind_driver+0xed/0x390 drivers/usb/gadget/udc/core.c:1662
    call_driver_probe drivers/base/dd.c:628 [inline]
    really_probe+0x12f/0x3a0 drivers/base/dd.c:706
    __driver_probe_device+0xe9/0x1a0 drivers/base/dd.c:868
    driver_probe_device+0x28/0xf0 drivers/base/dd.c:898
    __device_attach_driver+0x10f/0x170 drivers/base/dd.c:1026
    bus_for_each_drv+0xd2/0x130 drivers/base/bus.c:500
    __device_attach+0xf9/0x290 drivers/base/dd.c:1098
    device_initial_probe+0x6f/0x80 drivers/base/dd.c:1153
    bus_probe_device+0x3e/0xb0 drivers/base/bus.c:620
    device_add+0x99f/0xc80 drivers/base/core.c:3772
    usb_add_gadget+0x221/0x330 drivers/usb/gadget/udc/core.c:1461
    usb_add_gadget_udc_release drivers/usb/gadget/udc/core.c:1517 [inline]
    usb_add_gadget_udc+0x6e/0xb0 drivers/usb/gadget/udc/core.c:1564

BUG: memory leak
unreferenced object 0xffff88812a6d5600 (size 128):
  comm "syz.5.22", pid 6077, jiffies 4294944018
  hex dump (first 32 bytes):
    00 56 6d 2a 81 88 ff ff 00 56 6d 2a 81 88 ff ff  .Vm*.....Vm*....
    30 40 49 03 81 88 ff ff b8 4c 34 12 81 88 ff ff  [email protected].....
  backtrace (crc e492b8c):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4597 [inline]
    slab_alloc_node mm/slub.c:4917 [inline]
    __kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5485
    _kmalloc_noprof include/linux/slab.h:988 [inline]
    _kzalloc_noprof include/linux/slab.h:1309 [inline]
    dummy_alloc_request+0x65/0xf0 drivers/usb/gadget/udc/dummy_hcd.c:693
    usb_ep_alloc_request+0x2e/0xd0 drivers/usb/gadget/udc/core.c:197
    gadget_bind+0x67/0x230 drivers/usb/gadget/legacy/raw_gadget.c:294
    gadget_bind_driver+0xed/0x390 drivers/usb/gadget/udc/core.c:1662
    call_driver_probe drivers/base/dd.c:628 [inline]
    really_probe+0x12f/0x3a0 drivers/base/dd.c:706
    __driver_probe_device+0xe9/0x1a0 drivers/base/dd.c:868
    driver_probe_device+0x28/0xf0 drivers/base/dd.c:898
    __device_attach_driver+0x10f/0x170 drivers/base/dd.c:1026
    bus_for_each_drv+0xd2/0x130 drivers/base/bus.c:500
    __device_attach+0xf9/0x290 drivers/base/dd.c:1098
    device_initial_probe+0x6f/0x80 drivers/base/dd.c:1153
    bus_probe_device+0x3e/0xb0 drivers/base/bus.c:620
    device_add+0x99f/0xc80 drivers/base/core.c:3772
    usb_add_gadget+0x221/0x330 drivers/usb/gadget/udc/core.c:1461
    usb_add_gadget_udc_release drivers/usb/gadget/udc/core.c:1517 [inline]
    usb_add_gadget_udc+0x6e/0xb0 drivers/usb/gadget/udc/core.c:1564

BUG: memory leak
unreferenced object 0xffff88812a6d5080 (size 128):
  comm "syz.0.26", pid 6083, jiffies 4294944267
  hex dump (first 32 bytes):
    80 50 6d 2a 81 88 ff ff 80 50 6d 2a 81 88 ff ff  .Pm*.....Pm*....
    30 40 49 03 81 88 ff ff 00 00 00 00 00 00 00 00  0@I.............
  backtrace (crc b6755c66):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4597 [inline]
    slab_alloc_node mm/slub.c:4917 [inline]
    __kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5485
    _kmalloc_noprof include/linux/slab.h:988 [inline]
    _kzalloc_noprof include/linux/slab.h:1309 [inline]
    dummy_alloc_request+0x65/0xf0 drivers/usb/gadget/udc/dummy_hcd.c:693
    usb_ep_alloc_request+0x2e/0xd0 drivers/usb/gadget/udc/core.c:197
    gadget_bind+0x67/0x230 drivers/usb/gadget/legacy/raw_gadget.c:294
    gadget_bind_driver+0xed/0x390 drivers/usb/gadget/udc/core.c:1662
    call_driver_probe drivers/base/dd.c:628 [inline]
    really_probe+0x12f/0x3a0 drivers/base/dd.c:706
    __driver_probe_device+0xe9/0x1a0 drivers/base/dd.c:868
    driver_probe_device+0x28/0xf0 drivers/base/dd.c:898
    __driver_attach drivers/base/dd.c:1292 [inline]
    __driver_attach+0x10a/0x200 drivers/base/dd.c:1232
    bus_for_each_dev+0xb8/0x120 drivers/base/bus.c:383
    bus_add_driver+0x122/0x280 drivers/base/bus.c:763
    driver_register+0xb1/0x140 drivers/base/driver.c:174
    usb_gadget_register_driver_owner+0x69/0xe0 drivers/usb/gadget/udc/core.c:1752
    raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:596 [inline]
    raw_ioctl+0xad7/0x10c0 drivers/usb/gadget/legacy/raw_gadget.c:1307
    vfs_ioctl fs/ioctl.c:51 [inline]
    __do_sys_ioctl fs/ioctl.c:597 [inline]
    __se_sys_ioctl fs/ioctl.c:583 [inline]
    __x64_sys_ioctl+0xf4/0x140 fs/ioctl.c:583
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94

connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF


---
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