syzbot


INFO: rcu detected stall in x64_sys_call

Status: upstream: reported syz repro on 2024/09/09 20:48
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+65203730e781d98f23a0@syzkaller.appspotmail.com
First crash: 383d, last: 1d06h
Cause bisection: failed (error log, bisect log)
  
Discussions (5)
Title Replies (including bot) Last reply
[syzbot] Monthly input report (Feb 2025) 0 (1) 2025/02/05 12:43
[syzbot] Monthly input report (Jan 2025) 0 (1) 2025/01/06 10:01
[syzbot] Monthly input report (Dec 2024) 0 (1) 2024/12/05 09:04
[syzbot] Monthly input report (Nov 2024) 0 (1) 2024/11/04 08:58
[syzbot] [mm?] INFO: rcu detected stall in x64_sys_call 0 (2) 2024/10/02 04:18
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: rcu detected stall in x64_sys_call 1 357d 357d 0/3 auto-obsoleted due to no activity on 2024/10/06 02:18
linux-6.1 INFO: rcu detected stall in x64_sys_call 1 48d 48d 0/3 upstream: reported on 2025/05/03 06:03
android-5-15 BUG: soft lockup in x64_sys_call origin:upstream C 26 49d 299d 0/2 upstream: reported C repro on 2024/08/25 04:51
android-6-1 BUG: soft lockup in x64_sys_call origin:upstream syz 1 16d 130d 0/2 premoderation: reported syz repro on 2025/02/10 08:39
Last patch testing requests (5)
Created Duration User Patch Repo Result
2025/02/28 00:09 1h29m retest repro https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing log
2025/02/28 00:09 1h28m retest repro https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing OK log
2025/02/28 00:09 13m retest repro https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing OK log
2025/02/28 00:09 14m retest repro https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing OK log
2025/02/27 22:50 19m retest repro upstream report log

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10504 jiffies, g=12125, q=582 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 6246 (4294975265-4294969019), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 6246 jiffies! g12125 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:25784 pid:18    tgid:18    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6857
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6058 Comm: dhcpcd Not tainted 6.14.0-rc7-syzkaller-00196-g88d324e69ea9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:advance_sched+0x602/0xca0
Code: 23 f8 48 8b 1b 42 80 7c 25 00 00 48 8b 6c 24 40 74 08 4c 89 ef e8 3e e9 23 f8 4b 03 1c fe 48 89 e8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 ef e8 14 ea 23 f8 4b 89 9c fe c0 00 00 00 4c 39 bc 24
RSP: 0018:ffffc90000a28c70 EFLAGS: 00000046
RAX: 1ffff1100ee54f99 RBX: 0000005414fd3780 RCX: ffff88802ea4bc00
RDX: 0000000000010000 RSI: 0000000000000cb2 RDI: 0000000000000000
RBP: ffff8880772a7cc8 R08: ffffffff8a0535b3 R09: fffff5200014517c
R10: dffffc0000000000 R11: fffff5200014517c R12: dffffc0000000000
R13: ffff8880772a7c08 R14: ffff8880772a7c00 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f530816680 CR3: 0000000030c94000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1801 [inline]
 __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x26/0x550 kernel/locking/lockdep.c:5819
Code: 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 20 01 00 00 4c 89 4c 24 28 4c 89 44 24 38 <48> 89 4c 24 30 89 54 24 1c 41 89 f6 48 89 7c 24 20 65 48 8b 04 25
RSP: 0018:ffffc90003477300 EFLAGS: 00000286
RAX: 0000000000000002 RBX: 00000000000001e0 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8eb39360
RBP: ffffc90003477450 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff940003ff849 R12: dffffc0000000000
R13: 000000000007ff09 R14: ffffffff823510f6 R15: ffff88813fffa720
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock_sched include/linux/rcupdate.h:941 [inline]
 pfn_valid+0x113/0x450 include/linux/mmzone.h:2067
 page_table_check_clear+0x1e/0x550 mm/page_table_check.c:70
 get_and_clear_full_ptes include/linux/pgtable.h:712 [inline]
 zap_present_folio_ptes mm/memory.c:1510 [inline]
 zap_present_ptes mm/memory.c:1595 [inline]
 do_zap_pte_range mm/memory.c:1697 [inline]
 zap_pte_range mm/memory.c:1741 [inline]
 zap_pmd_range mm/memory.c:1833 [inline]
 zap_pud_range mm/memory.c:1862 [inline]
 zap_p4d_range mm/memory.c:1883 [inline]
 unmap_page_range+0x33fa/0x4510 mm/memory.c:1904
 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1994
 exit_mmap+0x283/0xd40 mm/mmap.c:1284
 __mmput+0x115/0x420 kernel/fork.c:1356
 exit_mm+0x220/0x310 kernel/exit.c:570
 do_exit+0x9ad/0x2940 kernel/exit.c:925
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 __do_sys_exit_group kernel/exit.c:1098 [inline]
 __se_sys_exit_group kernel/exit.c:1096 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f607778da90
Code: Unable to access opcode bytes at 0x7f607778da66.
RSP: 002b:00007fff567133d8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f60776dd6c0 RCX: 00007f607778da90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007fff56713458 R08: 0000000000000007 R09: 6c68308a5d4c873d
R10: 0000000000000770 R11: 0000000000000202 R12: 0000000000000001
R13: 00007fff56713a28 R14: 0000000000000003 R15: 0000000000000000
 </TASK>

Crashes (307):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/22 14:52 upstream 88d324e69ea9 c6512ef7 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in x64_sys_call
2025/03/13 04:33 upstream 0fed89a961ea 1a5d9317 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/02/02 15:19 upstream 69e858e0b8b2 568559e4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2024/10/19 11:09 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 07b887f8236e cd6fc0a3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-upstream-usb INFO: rcu detected stall in x64_sys_call
2025/06/17 17:51 upstream 9afe652958c3 417d98fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in x64_sys_call
2025/06/17 10:32 upstream 9afe652958c3 417d98fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in x64_sys_call
2025/06/16 14:02 upstream e04c78d86a96 d1716036 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/06/16 11:01 upstream e04c78d86a96 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in x64_sys_call
2025/06/15 19:51 upstream 08215f5486ec 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in x64_sys_call
2025/06/15 17:55 upstream 08215f5486ec 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in x64_sys_call
2025/06/14 15:46 upstream 4774cfe3543a 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/06/13 22:30 upstream 02adc1490e6d 0e8da31f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in x64_sys_call
2025/06/13 02:55 upstream 27605c8c0f69 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/06/12 23:43 upstream 27605c8c0f69 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in x64_sys_call
2025/06/12 07:30 upstream 488ef3560196 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in x64_sys_call
2025/06/11 02:54 upstream aef17cb3d3c4 5d7e17ca .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/06/10 13:10 upstream f09079bd04a9 5d7e17ca .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/06/09 22:31 upstream 19272b37aa4f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/06/08 02:07 upstream 5b032cac6225 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/06/07 22:27 upstream 5b032cac6225 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/06/07 19:57 upstream 5b032cac6225 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/06/07 12:56 upstream 7a912d04415b 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/06/07 03:31 upstream 7a912d04415b f61267d4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/06/06 05:28 upstream cfc4ca8986bb 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in x64_sys_call
2025/06/05 07:04 upstream 64980441d269 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in x64_sys_call
2025/06/04 17:02 upstream 5abc7438f1e9 fd5e6e61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/06/04 04:44 upstream 5abc7438f1e9 a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/06/03 20:01 upstream 546b1c9e93c2 a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/06/01 16:20 upstream 7d4e49a77d99 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/05/31 08:13 upstream 8477ab143069 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/05/30 23:45 upstream 8477ab143069 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/05/26 20:41 upstream 0ff41df1cb26 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/05/26 07:42 upstream 0f8c0258bf04 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/05/25 21:47 upstream 0f8c0258bf04 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/05/25 15:24 upstream d0c22de9995b ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/05/24 23:43 upstream b1427432d3b6 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/05/24 07:36 upstream 4856ebd99715 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in x64_sys_call
2025/05/23 16:21 upstream eccf6f2f6ab9 f8cc0c83 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/05/19 19:46 upstream a5806cd506af 8f9cf946 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/05/19 09:29 upstream a5806cd506af f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/05/16 00:35 upstream fee3e843b309 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/05/12 20:31 upstream 627277ba7c23 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/05/08 13:31 upstream d76bb1ebb558 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/05/06 18:57 upstream 0d8d44db295c ae98e6b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/05/05 14:42 upstream 92a09c47464d 6ca47dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in x64_sys_call
2025/05/05 12:34 upstream 92a09c47464d 6ca47dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/05/04 08:59 upstream 2a239ffbebb5 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in x64_sys_call
2025/05/03 11:07 upstream 95d3481af6dc b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in x64_sys_call
2025/05/02 12:17 upstream ebd297a2affa 2bfec9c0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/04/26 13:20 upstream f1a3944c860b c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in x64_sys_call
2025/04/25 13:57 upstream 02ddfb981de8 e3715315 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in x64_sys_call
2025/04/23 00:00 upstream bc3372351d0c 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in x64_sys_call
2025/04/21 11:06 upstream 9d7a0577c9db 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in x64_sys_call
2024/09/09 08:12 upstream 89f5e14d05b4 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2024/09/05 20:42 upstream c763c4339688 464ac2ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2024/08/22 13:31 upstream 872cf28b8df9 295a4b50 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in x64_sys_call
2025/05/03 18:50 upstream 95d3481af6dc b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: rcu detected stall in x64_sys_call
2025/04/15 03:46 net f0433eea4688 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in x64_sys_call
2025/03/23 19:12 net-next bfc17c165835 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in x64_sys_call
2025/06/19 09:31 linux-next 6e5ab6fee68d ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: rcu detected stall in x64_sys_call
2025/06/15 21:32 linux-next bc6e0ba6c9ba 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: rcu detected stall in x64_sys_call
2025/06/03 13:48 linux-next a0bea9e39035 a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: rcu detected stall in x64_sys_call
2024/10/31 18:41 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing c67e9601e29a 96eb609f .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-upstream-usb INFO: rcu detected stall in x64_sys_call
2024/10/25 10:46 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing c6d9e43954bf c79b8ca5 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-upstream-usb INFO: rcu detected stall in x64_sys_call
2024/10/02 04:17 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 9852d85ec9d4 ea2b66a6 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-upstream-usb INFO: rcu detected stall in x64_sys_call
* Struck through repros no longer work on HEAD.