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

Status: upstream: reported C repro on 2026/07/28 13:41
Subsystems: usb
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+debc5c305403f180c01c@syzkaller.appspotmail.com
First crash: 100d, last: 2d22h
Cause bisection: failed (error log, bisect log)
  
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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 (3)
Title Replies (including bot) Last reply
[PATCH] usb: gadget: f_uac1: fix ac_header_desc in descriptor lists 2 (2) 2026/10/10 02:28
[syzbot] [usb?] KASAN: global-out-of-bounds Read in usb_copy_descriptors 0 (2) 2026/10/01 01:00
[PATCH] usb: gadget: f_uac1: fix ac_header_desc in SS descriptor list 1 (1) 2026/08/01 21:08

Sample crash report:
==================================================================
BUG: KASAN: global-out-of-bounds in usb_copy_descriptors+0x18d/0x320 drivers/usb/gadget/config.c:94
Read of size 224 at addr ffffffff9cce6ea0 by task syz.0.17/5922

CPU: 2 UID: 0 PID: 5922 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
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+0x210/0x460 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:386
 bus_add_driver+0x4bf/0x620 drivers/base/bus.c:771
 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+0x6af/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f104a39f559
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:00007ffdd7537a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f104a625fa0 RCX: 00007f104a39f559
RDX: 000000000000000c RSI: 0000200000000480 RDI: 0000000000000003
RBP: 00007f104a436b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f104a625fac R14: 00007f104a625fa0 R15: 00007f104a625fa0
 </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:0x1cce6
flags: 0xfff00000002000(reserved|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002000 ffffea0000733988 ffffea0000733988 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:
 ffffffff9cce6d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff9cce6e00: f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9 00 f9 f9 f9
>ffffffff9cce6e80: f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9 00 00 f9 f9
                                  ^
 ffffffff9cce6f00: f9 f9 f9 f9 00 00 f9 f9 f9 f9 f9 f9 00 00 f9 f9
 ffffffff9cce6f80: f9 f9 f9 f9 00 00 f9 f9 f9 f9 f9 f9 00 f9 f9 f9
==================================================================

Crashes (639):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/22 13:56 upstream 7be4bc52fd9e 3875c4e4 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/10/26 19:55 upstream 6b4b543fa187 168cb7a2 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/10/01 00:59 linux-next 6c2cb8b8b843 892a21ec .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/10/25 02:31 upstream 5b0764a53235 1d9ca40b .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
2026/10/21 12:15 upstream 9e947d96915a 61c200c7 .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
2026/10/20 00:13 upstream c03c1a14507d 72cdc28d .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
2026/10/19 12:50 upstream f909e534f5e3 432c0077 .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
2026/10/18 05:15 upstream 58161ead29e5 432c0077 .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
2026/10/17 18:10 upstream 58161ead29e5 432c0077 .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
2026/10/14 19:31 upstream 4056b3c9d3c9 7321cd29 .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
2026/10/12 03:34 upstream b88c841d1164 4f92358f .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
2026/10/08 10:04 upstream 7b63ef2d55f2 4f6a9fcf .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
2026/10/08 06:58 upstream 7b63ef2d55f2 6520ecdb .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
2026/10/06 07:36 upstream 2c3418fffa9d f7710056 .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
2026/07/27 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
2026/07/25 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
2026/10/20 08:36 upstream f47d223627f8 21286ae2 .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
2026/10/20 03:49 upstream c03c1a14507d 21286ae2 .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
2026/10/19 13:52 upstream c03c1a14507d 440f8011 .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
2026/10/19 11:23 upstream c03c1a14507d 440f8011 .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
2026/10/14 16:44 upstream 4056b3c9d3c9 1a71827b .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
2026/10/14 15:14 upstream 4056b3c9d3c9 1a71827b .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
2026/10/14 09:19 upstream ca3e345926b0 7321cd29 .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
2026/10/14 05:05 upstream ca3e345926b0 7321cd29 .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
2026/10/14 00:40 upstream 24a19b953e2a 7321cd29 .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
2026/10/13 23:24 upstream 24a19b953e2a 7321cd29 .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
2026/10/13 21:44 upstream 24a19b953e2a 7321cd29 .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
2026/10/13 20:08 upstream 24a19b953e2a 7321cd29 .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
2026/10/10 22:40 upstream 3857c2fe5449 4f92358f .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
2026/10/10 17:22 upstream 3857c2fe5449 4f92358f .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
2026/10/10 15:42 upstream 3857c2fe5449 4f92358f .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
2026/10/10 00:13 upstream af32da41b032 549ef7e3 .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
2026/10/09 21:06 upstream af32da41b032 549ef7e3 .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
2026/10/09 17:53 upstream af32da41b032 549ef7e3 .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
2026/10/09 03:31 upstream 6c377d19d4a5 b2734a59 .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
2026/10/08 16:16 upstream 0c2669a9f4a1 9d4697fa .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
2026/10/08 14:31 upstream 0c2669a9f4a1 9d4697fa .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
2026/10/30 08:00 upstream 4dd16e31135e b498adee .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
2026/10/29 07:06 upstream c339f4010dea b1d00f76 .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
2026/10/24 13:24 upstream 4da9dedf3fc5 1d9ca40b .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
2026/10/20 05:43 upstream c03c1a14507d 21286ae2 .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
2026/10/13 03:21 upstream 24a19b953e2a 745a967f .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
2026/10/11 03:00 upstream a5ebb76233b7 4f92358f .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
2026/10/11 03:00 upstream a5ebb76233b7 4f92358f .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
2026/10/10 19:34 upstream 3857c2fe5449 4f92358f .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
2026/10/10 10:44 upstream 3857c2fe5449 4f92358f .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
2026/10/09 12:18 upstream 6c377d19d4a5 b2734a59 .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
2026/10/09 09:31 upstream 6c377d19d4a5 b2734a59 .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
2026/10/28 17:51 linux-next 6d0933ae9d46 858db2ec .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
2026/10/25 10:28 linux-next 20a33c6b6cbe 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/10/20 02:18 linux-next 3d229ce89862 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/10/09 15:28 linux-next aac26bee2287 a8add9cd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/10/08 12:56 linux-next b01868671970 4f6a9fcf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/10/07 18:19 linux-next b01868671970 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/10/07 06:10 linux-next eea3fef32a9c f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/10/06 15:29 linux-next eea3fef32a9c f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/10/05 17:33 linux-next bf1ee2bd5c2d 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/10/05 03:12 linux-next f0406245cb98 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: global-out-of-bounds Read in usb_copy_descriptors
2026/09/28 06:30 linux-next f5f84daefcd9 a3c7249d .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.