* [syzbot] [usb?] memory leak in uss720_probe
@ 2026-07-16 7:50 syzbot
0 siblings, 0 replies; only message in thread
From: syzbot @ 2026-07-16 7:50 UTC (permalink / raw)
To: gregkh, linux-kernel, linux-usb, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 58717b2a1365 Merge tag 'sound-7.2-rc4' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15a344b9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=b80376788da8bcda
dashboard link: https://syzkaller.appspot.com/bug?extid=56962eb32ba0136cd330
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=10f70b46580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=162454b9580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/dac88573d763/disk-58717b2a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/29447c97aeb1/vmlinux-58717b2a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/076ab0265b89/bzImage-58717b2a.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/cbc20556ddac/mount_1.gz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=17770b46580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+56962eb32ba0136cd330@syzkaller.appspotmail.com
BUG: memory leak
unreferenced object 0xffff88812c0e34c0 (size 64):
comm "kworker/0:0", pid 9, jiffies 4294942439
hex dump (first 32 bytes):
00 b8 b6 05 81 88 ff ff 00 00 00 00 00 00 00 00 ................
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 7291ab94):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4625 [inline]
slab_alloc_node mm/slub.c:4945 [inline]
__kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5511
_kmalloc_noprof include/linux/slab.h:969 [inline]
_kzalloc_noprof include/linux/slab.h:1290 [inline]
uss720_probe+0xf6/0x330 drivers/usb/misc/uss720.c:702
usb_probe_interface+0x210/0x480 drivers/usb/core/driver.c:396
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_set_configuration+0x8f5/0xb80 drivers/usb/core/message.c:2268
usb_generic_driver_probe+0x73/0xb0 drivers/usb/core/generic.c:250
usb_probe_device+0x78/0x1f0 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:628 [inline]
really_probe+0x12f/0x3a0 drivers/base/dd.c:706
BUG: memory leak
unreferenced object 0xffff88812d350b40 (size 96):
comm "kworker/0:0", pid 9, jiffies 4294942439
hex dump (first 32 bytes):
c0 34 0e 2c 81 88 ff ff 01 00 00 00 00 00 00 00 .4.,............
e0 34 0e 2c 81 88 ff ff e0 34 0e 2c 81 88 ff ff .4.,.....4.,....
backtrace (crc 519c4231):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4625 [inline]
slab_alloc_node mm/slub.c:4945 [inline]
__kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5511
_kmalloc_noprof include/linux/slab.h:969 [inline]
_kzalloc_noprof include/linux/slab.h:1290 [inline]
submit_async_request.constprop.0+0x6b/0x440 drivers/usb/misc/uss720.c:137
get_1284_register+0x4a/0x1a0 drivers/usb/misc/uss720.c:205
uss720_probe+0x205/0x330 drivers/usb/misc/uss720.c:733
usb_probe_interface+0x210/0x480 drivers/usb/core/driver.c:396
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_set_configuration+0x8f5/0xb80 drivers/usb/core/message.c:2268
usb_generic_driver_probe+0x73/0xb0 drivers/usb/core/generic.c:250
BUG: memory leak
unreferenced object 0xffff88812d277180 (size 192):
comm "kworker/0:0", pid 9, jiffies 4294942439
hex dump (first 32 bytes):
01 00 00 00 98 ff ff ff 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 98 71 27 2d 81 88 ff ff .........q'-....
backtrace (crc 26b7be33):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4625 [inline]
slab_alloc_node mm/slub.c:4945 [inline]
__do_kmalloc_node mm/slub.c:5361 [inline]
__kmalloc_noprof+0x3bf/0x550 mm/slub.c:5387
_kmalloc_noprof include/linux/slab.h:973 [inline]
usb_alloc_urb+0x66/0xa0 drivers/usb/core/urb.c:75
submit_async_request.constprop.0+0x11c/0x440 drivers/usb/misc/uss720.c:145
get_1284_register+0x4a/0x1a0 drivers/usb/misc/uss720.c:205
uss720_probe+0x205/0x330 drivers/usb/misc/uss720.c:733
usb_probe_interface+0x210/0x480 drivers/usb/core/driver.c:396
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_set_configuration+0x8f5/0xb80 drivers/usb/core/message.c:2268
BUG: memory leak
unreferenced object 0xffff888111cfec80 (size 8):
comm "kworker/0:0", pid 9, jiffies 4294942439
hex dump (first 8 bytes):
c0 03 00 00 00 00 07 00 ........
backtrace (crc 40fcb6d):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4625 [inline]
slab_alloc_node mm/slub.c:4945 [inline]
__kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5511
_kmalloc_noprof include/linux/slab.h:969 [inline]
submit_async_request.constprop.0+0x143/0x440 drivers/usb/misc/uss720.c:150
get_1284_register+0x4a/0x1a0 drivers/usb/misc/uss720.c:205
uss720_probe+0x205/0x330 drivers/usb/misc/uss720.c:733
usb_probe_interface+0x210/0x480 drivers/usb/core/driver.c:396
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_set_configuration+0x8f5/0xb80 drivers/usb/core/message.c:2268
usb_generic_driver_probe+0x73/0xb0 drivers/usb/core/generic.c:250
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF
---
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2026-07-16 7:50 [syzbot] [usb?] memory leak in uss720_probe syzbot
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