KASAN: global-out-of-bounds Read in usb_copy_descriptors

Status: upstream: reported on 2026/07/28 13:41
Subsystems: usb
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+debc5c305403f180c01c@syzkaller.appspotmail.com
First crash: 12d, last: 1h13m
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ID Workflow Result Correct Bug Created Started Finished Revision
1662516b assessment-security DenialOfService: ✅ Exploitable: ✅ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ KASAN: global-out-of-bounds Read in usb_copy_descriptors 2026/07/26 02:15 2026/07/26 02:15 2026/07/26 03:35 492bab15
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[PATCH] usb: gadget: f_uac1: fix ac_header_desc in SS descriptor list 1 (1) 2026/08/01 21:08
[syzbot] [usb?] KASAN: global-out-of-bounds Read in usb_copy_descriptors 0 (1) 2026/07/28 13:41

Sample crash report:
==================================================================
BUG: KASAN: global-out-of-bounds in usb_copy_descriptors+0x18d/0x320 drivers/usb/gadget/config.c:94
Read of size 64 at addr ffffffff9ba57740 by task syz.5.1694/12300

CPU: 0 UID: 0 PID: 12300 Comm: syz.5.1694 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x13d/0x4b0 mm/kasan/report.c:482
 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:186 [inline]
 kasan_check_range+0x10f/0x1e0 mm/kasan/generic.c:200
 __asan_memcpy+0x23/0x60 mm/kasan/shadow.c:105
 usb_copy_descriptors+0x18d/0x320 drivers/usb/gadget/config.c:94
 usb_assign_descriptors+0xd2/0x470 drivers/usb/gadget/config.c:131
 f_audio_bind+0x243a/0x3950 drivers/usb/gadget/function/f_uac1.c:1443
 usb_add_function+0x219/0x890 drivers/usb/gadget/composite.c:333
 configfs_composite_bind+0xd83/0x1960 drivers/usb/gadget/configfs.c:1802
 gadget_bind_driver+0x28c/0xbf0 drivers/usb/gadget/udc/core.c:1662
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:706
 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
 __driver_attach+0x21f/0x5b0 drivers/base/dd.c:1292
 bus_for_each_dev+0x13e/0x1d0 drivers/base/bus.c:383
 bus_add_driver+0x305/0x5b0 drivers/base/bus.c:763
 driver_register+0x1e2/0x360 drivers/base/driver.c:174
 usb_gadget_register_driver_owner+0x132/0x210 drivers/usb/gadget/udc/core.c:1752
 gadget_dev_desc_UDC_store+0x1b0/0x2e0 drivers/usb/gadget/configfs.c:300
 flush_write_buffer fs/configfs/file.c:207 [inline]
 configfs_write_iter+0x302/0x4e0 fs/configfs/file.c:229
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff3ac39e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff3ad2b4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff3ac626090 RCX: 00007ff3ac39e0d9
RDX: 000000000000000c RSI: 0000200000002100 RDI: 0000000000000003
RBP: 00007ff3ac435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff3ac626128 R14: 00007ff3ac626090 R15: 00007ffdfca68ea8
 </TASK>

The buggy address belongs to the variable:
 ac_header_desc+0x0/0x40

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ba57
flags: 0xfff00000002000(reserved|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002000 ffffea00006e95c8 ffffea00006e95c8 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffffffff9ba57600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff9ba57680: 00 00 00 00 f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9
>ffffffff9ba57700: 00 f9 f9 f9 f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9
                                              ^
 ffffffff9ba57780: 00 00 f9 f9 f9 f9 f9 f9 00 00 f9 f9 f9 f9 f9 f9
 ffffffff9ba57800: 00 00 f9 f9 f9 f9 f9 f9 00 00 f9 f9 f9 f9 f9 f9
==================================================================

Crashes (274):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/06 04:39 upstream 0d8395707651 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/06 02:09 upstream 0d8395707651 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/05 08:42 upstream c21bb4193868 b3eac40e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/05 05:06 upstream c21bb4193868 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/04 14:19 upstream 848acc8ffe1b d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/04 09:21 upstream c8e0d43058e6 a68cb31b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/03 17:31 upstream 075b74841bd0 a68cb31b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/03 12:46 upstream 075b74841bd0 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/03 11:21 upstream 075b74841bd0 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/03 10:04 upstream 075b74841bd0 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/02 22:52 upstream bd1dde877520 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/02 17:03 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/02 00:50 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/01 21:35 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/01 04:56 upstream 8ba098e6b6ff 7664cf44 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/01 02:23 upstream 8ba098e6b6ff 7664cf44 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/31 14:51 upstream 8ba098e6b6ff 7664cf44 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/31 02:24 upstream 3708dd948844 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/31 00:59 upstream 3708dd948844 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/30 23:45 upstream 3708dd948844 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/30 20:25 upstream 11028ab62899 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/30 07:16 upstream 11028ab62899 2377cd3d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/27 23:27 upstream f5098b6bae76 4cb2b096 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/27 13:22 upstream f5098b6bae76 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/25 22:28 upstream 0ce37745d4bf 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/25 05:01 upstream e2a936998ab2 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/24 13:30 upstream d326f83e819c 544adce9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/03 22:07 upstream 075b74841bd0 bdd50915 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/02 12:31 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/02 07:48 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/02 05:05 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/02 03:44 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/02 02:08 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/01 23:49 upstream 02dc699f83d0 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/01 13:42 upstream 02dc699f83d0 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/31 22:49 upstream a2cf4ef33184 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/31 13:31 upstream 8ba098e6b6ff db462e94 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/31 07:43 upstream 3708dd948844 aaffb173 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/31 04:13 upstream 3708dd948844 aaffb173 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/30 16:08 upstream 11028ab62899 abc81b93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/30 04:57 upstream fc46aed51f62 2377cd3d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/03 23:46 upstream 848acc8ffe1b 9451e17e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/03 04:28 upstream bd1dde877520 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/03 03:16 upstream bd1dde877520 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/02 21:39 upstream bd1dde877520 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/08/02 06:28 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/30 12:55 upstream 11028ab62899 abc81b93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/30 12:41 upstream 11028ab62899 abc81b93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/30 10:30 upstream 11028ab62899 abc81b93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/30 08:40 upstream fc46aed51f62 2377cd3d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/30 03:31 upstream fc46aed51f62 2377cd3d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/30 02:13 upstream fc46aed51f62 2377cd3d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/07/25 16:15 linux-next cc2b5f627e8c 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce KASAN: global-out-of-bounds Read in usb_copy_descriptors
* Struck through repros no longer work on HEAD.