general protection fault in set_link_state

Status: premoderation: reported syz repro on 2026/07/24 13:19
Reported-by: syzbot+ea2583294148bb499c00@syzkaller.appspotmail.com
First crash: 26d, last: 56m
▶ ▼ Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-1 general protection fault in set_link_state 2 215 5h37m 26d 0/2 premoderation: reported on 2026/07/24 17:03
android-6-12 general protection fault in set_link_state 2 syz 562 57m 26d 0/1 premoderation: reported syz repro on 2026/07/24 19:03
android-5-15 general protection fault in set_link_state 2 syz 158 4h32m 25d 0/2 premoderation: reported syz repro on 2026/07/25 11:11
linux-5.15 general protection fault in set_link_state 2 syz, C 39 2d13h 25d 0/3 upstream: reported C repro on 2026/07/25 19:33
upstream general protection fault in set_link_state usb 2 1 238d 234d 0/29 auto-obsoleted due to no activity on 2026/03/25 06:13
upstream general protection fault in set_link_state (2) usb prio:low 19 syz, C 1567 1h01m 22d 0/29 closed as dup on 2026/07/29 12:31
linux-6.6 general protection fault in set_link_state 2 syz, C 34 10h16m 26d 0/2 upstream: reported C repro on 2026/07/25 01:05
linux-6.1 BUG: unable to handle kernel paging request in set_link_state 8 syz, C 51 3h03m 26d 0/3 upstream: reported C repro on 2026/07/24 22:28

Sample crash report:
dummy_hcd dummy_hcd.0: stopped
dummy_hcd dummy_hcd.0: USB bus 1 deregistered
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 422 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:set_link_state+0x2a/0x1210 drivers/usb/gadget/udc/dummy_hcd.c:432
Code: 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 60 49 89 fd 48 bb 00 00 00 00 00 fc ff df e8 4d fc 57 fe 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ef e8 c8 71 92 fe 4d 8b 75 00 49 8d 95 8b
RSP: 0018:ffffc90002d27798 EFLAGS: 00010046
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88811cef3b40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002d27820 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520005a4ef0 R12: 0000000000000a02
R13: 0000000000000000 R14: ffff88810b854000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dfedb994b0 CR3: 000000000640f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 dummy_pullup+0xd9/0x220 drivers/usb/gadget/udc/dummy_hcd.c:909
 usb_gadget_disconnect_locked+0x133/0x3b0 drivers/usb/gadget/udc/core.c:744
 usb_gadget_remove_driver+0x55/0x330 drivers/usb/gadget/udc/core.c:1492
 usb_gadget_unregister_driver+0x181/0x480 drivers/usb/gadget/udc/core.c:1656
 raw_release+0xda/0x260 drivers/usb/gadget/legacy/raw_gadget.c:415
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7c/0x24e0 kernel/exit.c:879
 do_group_exit+0x149/0x310 kernel/exit.c:993
 get_signal+0xfb1/0x1300 kernel/signal.c:2802
 arch_do_signal_or_restart+0xe7/0x11b0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f7496ac00d9
Code: Unable to access opcode bytes at RIP 0x7f7496ac00af.
RSP: 002b:00007f7496921028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 000000000000000c RBX: 00007f7496d47fa0 RCX: 00007f7496ac00d9
RDX: 000000000000000c RSI: 00002000000001c0 RDI: 0000000000000004
RBP: 00007f7496b57024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7496d48038 R14: 00007f7496d47fa0 R15: 00007ffef31863c8
Modules linked in:

---[ end trace 6d9347d2cff5545f ]---
RIP: 0010:set_link_state+0x2a/0x1210 drivers/usb/gadget/udc/dummy_hcd.c:432
Code: 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 60 49 89 fd 48 bb 00 00 00 00 00 fc ff df e8 4d fc 57 fe 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ef e8 c8 71 92 fe 4d 8b 75 00 49 8d 95 8b
RSP: 0018:ffffc90002d27798 EFLAGS: 00010046
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88811cef3b40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002d27820 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520005a4ef0 R12: 0000000000000a02
R13: 0000000000000000 R14: ffff88810b854000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dfedb994b0 CR3: 000000000640f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	55                   	push   %rbp
   1:	48 89 e5             	mov    %rsp,%rbp
   4:	41 57                	push   %r15
   6:	41 56                	push   %r14
   8:	41 55                	push   %r13
   a:	41 54                	push   %r12
   c:	53                   	push   %rbx
   d:	48 83 ec 60          	sub    $0x60,%rsp
  11:	49 89 fd             	mov    %rdi,%r13
  14:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  1b:	fc ff df
  1e:	e8 4d fc 57 fe       	call   0xfe57fc70
  23:	4c 89 e8             	mov    %r13,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 ef             	mov    %r13,%rdi
  33:	e8 c8 71 92 fe       	call   0xfe927200
  38:	4d 8b 75 00          	mov    0x0(%r13),%r14
  3c:	49                   	rex.WB
  3d:	8d                   	.byte 0x8d
  3e:	95                   	xchg   %eax,%ebp
  3f:	8b                   	.byte 0x8b

Crashes (466):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/17 04:40 android13-5.10-lts e334a66065d3 746171ee .config strace log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/07/28 22:28 android13-5.10-lts 50b3a256e550 edc8a875 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/07/28 02:13 android13-5.10-lts 50b3a256e550 45ae1df4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/20 09:07 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/20 07:40 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/20 05:25 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/20 04:12 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/20 02:29 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/20 01:23 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 23:14 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 21:38 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 20:15 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 19:52 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 18:49 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 16:49 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 15:36 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 12:31 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 10:43 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 04:37 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 02:25 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/19 00:47 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 23:10 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 22:06 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 20:16 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 18:50 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 17:01 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 15:06 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 13:26 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 11:35 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 08:22 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 06:09 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 05:55 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/18 04:49 android13-5.10-lts e334a66065d3 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 22:03 android13-5.10-lts e334a66065d3 905244d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 20:41 android13-5.10-lts e334a66065d3 905244d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 19:15 android13-5.10-lts e334a66065d3 905244d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 16:01 android13-5.10-lts e334a66065d3 905244d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 14:48 android13-5.10-lts e334a66065d3 905244d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 12:00 android13-5.10-lts e334a66065d3 905244d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 07:14 android13-5.10-lts e334a66065d3 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 06:02 android13-5.10-lts e334a66065d3 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 04:05 android13-5.10-lts e334a66065d3 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 02:51 android13-5.10-lts e334a66065d3 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 01:40 android13-5.10-lts e334a66065d3 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/17 01:15 android13-5.10-lts e334a66065d3 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/16 23:34 android13-5.10-lts e334a66065d3 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/16 22:30 android13-5.10-lts e334a66065d3 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/11 00:44 android13-5.10-lts 447db0046f21 508909ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
* Struck through repros no longer work on HEAD.