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: 18d, last: 8h29m
▶ ▼ 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 81 2h26m 17d 0/2 premoderation: reported on 2026/07/24 17:03
android-6-12 general protection fault in set_link_state 2 syz 362 2h50m 17d 0/1 premoderation: reported syz repro on 2026/07/24 19:03
android-5-15 general protection fault in set_link_state 2 syz 68 6m 17d 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 18 18h00m 16d 0/3 upstream: reported C repro on 2026/07/25 19:33
upstream general protection fault in set_link_state usb 2 1 229d 225d 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 886 2h14m 14d 0/29 closed as dup on 2026/07/29 12:31
linux-6.6 general protection fault in set_link_state 2 syz, C 13 16h00m 17d 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 21 11h36m 17d 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: 1 PID: 394 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 ed e5 57 fe 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ef e8 f8 5a 92 fe 4d 8b 75 00 49 8d 95 8b
RSP: 0018:ffffc90000e27798 EFLAGS: 00010046

RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88810edd0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e27820 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520001c4ef0 R12: 0000000000000a02
R13: 0000000000000000 R14: ffff88810b800000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f012b9b37b0 CR3: 000000000640f000 CR4: 00000000003506a0
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:873
 do_group_exit+0x149/0x310 kernel/exit.c:987
 get_signal+0xfb1/0x1300 kernel/signal.c:2794
 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: 0033:0x7fda63cc4e99
Code: Unable to access opcode bytes at RIP 0x7fda63cc4e6f.
RSP: 002b:00007fda63b26028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 000000000000000b RBX: 00007fda63f4cfa0 RCX: 00007fda63cc4e99
RDX: 000000000000000b RSI: 0000200000000200 RDI: 0000000000000004
RBP: 00007fda63d5aeaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fda63f4d038 R14: 00007fda63f4cfa0 R15: 00007ffd74138f88
Modules linked in:
---[ end trace 5d5130175eee2756 ]---
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 ed e5 57 fe 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ef e8 f8 5a 92 fe 4d 8b 75 00 49 8d 95 8b
RSP: 0018:ffffc90000e27798 EFLAGS: 00010046
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88810edd0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e27820 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520001c4ef0 R12: 0000000000000a02
R13: 0000000000000000 R14: ffff88810b800000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f012b9b37b0 CR3: 000000000640f000 CR4: 00000000003506a0
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 ed e5 57 fe       	call   0xfe57e610
  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 5a 92 fe       	call   0xfe925b30
  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 (247):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2026/08/11 08:07 android13-5.10-lts dce28bf8c73c 508909ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/11 05:59 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
2026/08/11 03:09 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
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
2026/08/10 20:32 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
2026/08/10 18:52 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
2026/08/10 18:23 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/10 16:51 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/10 14:00 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/10 12:11 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/10 11:11 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/10 09:43 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/10 07:01 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/10 05:38 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/10 00:45 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/09 21:02 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/09 19:22 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/09 17:15 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/09 13:27 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/09 12:00 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/09 07:45 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/09 02:49 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/08 23:36 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/08 22:04 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/08 19:11 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/08 13:52 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/08 10:10 android13-5.10-lts 447db0046f21 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/08 02:47 android13-5.10-lts 447db0046f21 e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/07 21:51 android13-5.10-lts 9fe41ae8657d e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/07 19:42 android13-5.10-lts 9fe41ae8657d e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/07 13:18 android13-5.10-lts 9fe41ae8657d e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/07 10:18 android13-5.10-lts 9fe41ae8657d e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/07 05:47 android13-5.10-lts 18edbc713650 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/07 03:06 android13-5.10-lts 18edbc713650 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/06 19:05 android13-5.10-lts 0f73d4924a74 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/06 13:28 android13-5.10-lts 0f73d4924a74 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/06 12:02 android13-5.10-lts 0f73d4924a74 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/04 21:51 android13-5.10-lts 0f73d4924a74 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/04 20:12 android13-5.10-lts 0f73d4924a74 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/04 18:39 android13-5.10-lts 0f73d4924a74 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/04 12:20 android13-5.10-lts 0f73d4924a74 9451e17e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/04 11:13 android13-5.10-lts 0f73d4924a74 9451e17e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/04 09:03 android13-5.10-lts 0f73d4924a74 9451e17e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/04 07:21 android13-5.10-lts 0f73d4924a74 9451e17e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/03 21:46 android13-5.10-lts 0f73d4924a74 6b7c9f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/03 20:31 android13-5.10-lts 0f73d4924a74 6b7c9f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in set_link_state
2026/08/03 16:16 android13-5.10-lts 0f73d4924a74 6b7c9f71 .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.