general protection fault in set_link_state

Status: premoderation: reported syz repro on 2026/07/25 11:11
Reported-by: syzbot+67bc4c5d7255222d1762@syzkaller.appspotmail.com
First crash: 7d15h, last: 1d18h
▶ ▼ 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 25 2d13h 8d09h 0/2 premoderation: reported on 2026/07/24 17:03
android-6-12 general protection fault in set_link_state 2 syz 170 1h03m 8d07h 0/1 premoderation: reported syz repro on 2026/07/24 19:03
linux-5.15 general protection fault in set_link_state 2 syz, C 6 5d20h 7d07h 0/3 upstream: reported C repro on 2026/07/25 19:33
upstream general protection fault in set_link_state usb 2 1 219d 215d 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 452 52m 4d12h 0/29 closed as dup on 2026/07/29 12:31
android-5-10 general protection fault in set_link_state 2 syz 135 2d17h 8d13h 0/2 premoderation: reported syz repro on 2026/07/24 13:19
linux-6.6 general protection fault in set_link_state 2 6 17h52m 8d01h 0/2 upstream: reported on 2026/07/25 01:05
linux-6.1 BUG: unable to handle kernel paging request in set_link_state 8 syz, C 12 18h21m 8d04h 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: 405 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
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 9d 08 40 fe 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ef e8 f8 77 7f fe 4d 8b 75 00 49 8d 95 8b
RSP: 0018:ffffc90001497760 EFLAGS: 00010046
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88811a35bb40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900014977e8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000292eec R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881045d4000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcaaadbb38 CR3: 000000000660f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dummy_pullup+0xcd/0x130 drivers/usb/gadget/udc/dummy_hcd.c:911
 usb_gadget_disconnect+0xe0/0x330 drivers/usb/gadget/udc/core.c:736
 usb_gadget_remove_driver+0x46/0x310 drivers/usb/gadget/udc/core.c:1436
 usb_gadget_unregister_driver+0x181/0x480 drivers/usb/gadget/udc/core.c:1606
 raw_release+0xda/0x260 drivers/usb/gadget/legacy/raw_gadget.c:416
 __fput+0x22b/0x900 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xb70/0x29a0 kernel/exit.c:890
 do_group_exit+0x149/0x310 kernel/exit.c:1004
 get_signal+0x64f/0x1430 kernel/signal.c:2908
 arch_do_signal_or_restart+0xe2/0x1100 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f5f4e096f99
Code: Unable to access opcode bytes at RIP 0x7f5f4e096f6f.
RSP: 002b:00007f5f4def8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 000000000000000b RBX: 00007f5f4e31efa0 RCX: 00007f5f4e096f99
RDX: 000000000000000b RSI: 0000200000000200 RDI: 0000000000000004
RBP: 00007f5f4e12dec4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5f4e31f038 R14: 00007f5f4e31efa0 R15: 00007ffe69a50b38
 </TASK>
Modules linked in:
---[ end trace 8b0ef71d366479ce ]---
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 9d 08 40 fe 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ef e8 f8 77 7f fe 4d 8b 75 00 49 8d 95 8b
RSP: 0018:ffffc90001497760 EFLAGS: 00010046
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88811a35bb40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900014977e8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000292eec R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881045d4000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcaaadbb38 CR3: 000000000660f000 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 9d 08 40 fe       	call   0xfe4008c0
  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 f8 77 7f fe       	call   0xfe7f7830
  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 (35):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/29 16:28 android13-5.15-lts 61d896ee2a80 6ef5c1e2 .config strace log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/31 08:13 android13-5.15-lts 61d896ee2a80 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/31 08:11 android13-5.15-lts 61d896ee2a80 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/30 06:24 android13-5.15-lts 61d896ee2a80 6ef5c1e2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/30 04:36 android13-5.15-lts 61d896ee2a80 6ef5c1e2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/29 18:53 android13-5.15-lts 61d896ee2a80 6ef5c1e2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/29 12:17 android13-5.15-lts 61d896ee2a80 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/29 05:44 android13-5.15-lts 61d896ee2a80 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/28 14:25 android13-5.15-lts 61d896ee2a80 edc8a875 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/28 12:43 android13-5.15-lts 61d896ee2a80 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/28 12:41 android13-5.15-lts 61d896ee2a80 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/28 12:31 android13-5.15-lts 61d896ee2a80 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/28 12:29 android13-5.15-lts 61d896ee2a80 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/28 12:18 android13-5.15-lts 61d896ee2a80 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/28 12:09 android13-5.15-lts 61d896ee2a80 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/28 10:56 android13-5.15-lts 61d896ee2a80 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/27 22:58 android13-5.15-lts 61d896ee2a80 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/27 16:50 android13-5.15-lts 61d896ee2a80 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/27 15:59 android13-5.15-lts 61d896ee2a80 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/27 10:20 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/27 10:13 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/27 10:11 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/27 03:37 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/27 01:37 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/26 12:00 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/26 04:41 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/25 13:32 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/25 13:30 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/25 12:52 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/25 12:42 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/25 12:28 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/25 12:22 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/25 12:20 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/25 12:14 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
2026/07/25 11:10 android13-5.15-lts 61d896ee2a80 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in set_link_state
* Struck through repros no longer work on HEAD.