* [syzbot] [usb?] memory leak in uss720_probe
@ 2026-07-16 7:50 syzbot
0 siblings, 0 replies; 3+ messages 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
---
This report is generated by a bot. It may contain errors.
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If the report is already addressed, let syzbot know by replying with:
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If you want syzbot to run the reproducer, reply with:
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If you want to undo deduplication, reply with:
#syz undup
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] [usb?] memory leak in uss720_probe
[not found] <aljCxrwM8-f93NlL@michalis-linux>
@ 2026-07-16 22:09 ` syzbot
0 siblings, 0 replies; 3+ messages in thread
From: syzbot @ 2026-07-16 22:09 UTC (permalink / raw)
To: linux-kernel, michail.tatas, syzkaller-bugs
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-by: syzbot+56962eb32ba0136cd330@syzkaller.appspotmail.com
Tested-by: syzbot+56962eb32ba0136cd330@syzkaller.appspotmail.com
Tested on:
commit: 481ed5dd Merge tag 'landlock-7.2-rc4' of git://git.ker..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=109034b9580000
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
patch: https://syzkaller.appspot.com/x/patch.diff?x=12a00cb9580000
Note: testing is done by a robot and is best-effort only.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] [usb?] memory leak in uss720_probe
[not found] <20260716120914.9099-1-kartikey406@gmail.com>
@ 2026-07-16 22:15 ` syzbot
0 siblings, 0 replies; 3+ messages in thread
From: syzbot @ 2026-07-16 22:15 UTC (permalink / raw)
To: kartikey406, linux-kernel, syzkaller-bugs
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
general protection fault in kill_all_async_requests_priv
Oops: general protection fault, probably for non-canonical address 0x6230343037302d77: 0000 [#1] SMP PTI
CPU: 0 UID: 0 PID: 6530 Comm: kworker/0:7 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:usb_kill_urb+0x30/0x140 drivers/usb/core/urb.c:706
Code: 55 53 48 83 ec 30 65 48 8b 1d d4 4f dd 05 48 89 5c 24 28 48 89 fb e8 8f 03 c3 fd 2e 2e 2e 31 c0 48 85 db 74 4c e8 80 03 c3 fd <48> 83 7b 40 00 74 40 e8 74 03 c3 fd 48 83 7b 48 00 74 34 e8 68 03
RSP: 0018:ffffc900031ef680 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 6230343037302d37 RCX: ffffffff83c14112
RDX: ffff888109a6ec00 RSI: ffffffff83c14050 RDI: 6230343037302d37
RBP: 7369646632785c4c R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 7369646632785c4c
R13: ffff88812c3cd6f0 R14: ffff88812c3cd6e0 R15: 000000000000001f
FS: 0000000000000000(0000) GS:ffff8881b202b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561313ede480 CR3: 000000012f13a000 CR4: 00000000003526f0
Call Trace:
<TASK>
kill_all_async_requests_priv.isra.0+0x58/0x90 drivers/usb/misc/uss720.c:185
get_1284_register.cold+0x19/0x5b drivers/usb/misc/uss720.c:227
uss720_probe+0x1fa/0x2e0 drivers/usb/misc/uss720.c:735
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
__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_new_device.cold+0x115/0x626 drivers/usb/core/hub.c:2695
hub_port_connect drivers/usb/core/hub.c:5567 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x1723/0x2180 drivers/usb/core/hub.c:5953
process_one_work+0x277/0x5a0 kernel/workqueue.c:3322
process_scheduled_works kernel/workqueue.c:3405 [inline]
worker_thread+0x255/0x4a0 kernel/workqueue.c:3486
kthread+0x14e/0x1a0 kernel/kthread.c:436
ret_from_fork+0x219/0x490 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
0: 55 push %rbp
1: 53 push %rbx
2: 48 83 ec 30 sub $0x30,%rsp
6: 65 48 8b 1d d4 4f dd mov %gs:0x5dd4fd4(%rip),%rbx # 0x5dd4fe2
d: 05
e: 48 89 5c 24 28 mov %rbx,0x28(%rsp)
13: 48 89 fb mov %rdi,%rbx
16: e8 8f 03 c3 fd call 0xfdc303aa
1b: 2e 2e 2e 31 c0 cs cs cs xor %eax,%eax
20: 48 85 db test %rbx,%rbx
23: 74 4c je 0x71
25: e8 80 03 c3 fd call 0xfdc303aa
* 2a: 48 83 7b 40 00 cmpq $0x0,0x40(%rbx) <-- trapping instruction
2f: 74 40 je 0x71
31: e8 74 03 c3 fd call 0xfdc303aa
36: 48 83 7b 48 00 cmpq $0x0,0x48(%rbx)
3b: 74 34 je 0x71
3d: e8 .byte 0xe8
3e: 68 .byte 0x68
3f: 03 .byte 0x3
Tested on:
commit: 481ed5dd Merge tag 'landlock-7.2-rc4' of git://git.ker..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=138b4b46580000
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
patch: https://syzkaller.appspot.com/x/patch.diff?x=129ad4b9580000
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2026-07-16 22:15 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
[not found] <20260716120914.9099-1-kartikey406@gmail.com>
2026-07-16 22:15 ` [syzbot] [usb?] memory leak in uss720_probe syzbot
[not found] <aljCxrwM8-f93NlL@michalis-linux>
2026-07-16 22:09 ` syzbot
2026-07-16 7:50 syzbot
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