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List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:ca0a:0:b0:3a4:e62b:4e20 with SMTP id e9e14a558f8ab-3a6f19b2cfemr66241625ab.9.1731140666327; Sat, 09 Nov 2024 00:24:26 -0800 (PST) Date: Sat, 09 Nov 2024 00:24:26 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <672f1c3a.050a0220.138bd5.003a.GAE@google.com> Subject: [syzbot] [kernel?] INFO: rcu detected stall in schedule_timeout (7) From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 557329bcecc2 Merge tag 'mmc-v6.12-rc3' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16a296a7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=11254d3590b16717 dashboard link: https://syzkaller.appspot.com/bug?extid=8926d1b522e7194a4b3e compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=108ced5f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/47c1323cbaa7/disk-557329bc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/32b880369d29/vmlinux-557329bc.xz kernel image: https://storage.googleapis.com/syzbot-assets/4799d7cbb82a/bzImage-557329bc.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8926d1b522e7194a4b3e@syzkaller.appspotmail.com rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6107/1:b..l rcu: (detected by 1, t=10502 jiffies, g=10381, q=1041 ncpus=2) task:syz.5.20 state:R running task stack:25752 pid:6107 tgid:6107 ppid:5944 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x184f/0x4c30 kernel/sched/core.c:6690 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6869 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6893 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12 unwind_next_frame+0x18f8/0x22d0 arch/x86/kernel/unwind_orc.c:672 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 save_stack+0xfb/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x76/0x430 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 discard_slab mm/slub.c:2677 [inline] __put_partials+0xeb/0x130 mm/slub.c:3145 put_cpu_partial+0x17c/0x250 mm/slub.c:3220 __slab_free+0x2ea/0x3d0 mm/slub.c:4449 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_kmalloc+0x23/0xb0 mm/kasan/common.c:385 kasan_kmalloc include/linux/kasan.h:257 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4295 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] kobject_uevent_env+0x28b/0x8e0 lib/kobject_uevent.c:540 device_remove drivers/base/dd.c:567 [inline] __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x4ab/0x7c0 drivers/base/dd.c:1296 driver_detach+0x1fb/0x2d0 drivers/base/dd.c:1359 bus_remove_driver+0x1f3/0x320 drivers/base/bus.c:744 usb_gadget_unregister_driver+0x4e/0x70 drivers/usb/gadget/udc/core.c:1732 raw_release+0xf6/0x1e0 drivers/usb/gadget/legacy/raw_gadget.c:462 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff4b9d7e719 RSP: 002b:00007ffdb979f378 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 000000000001e66c RCX: 00007ff4b9d7e719 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007ff4b9f37a80 R08: 0000000000000001 R09: 00007ffdb979f66f R10: 00007ff4b9c00000 R11: 0000000000000246 R12: 000000000001eb0d R13: 00007ffdb979f480 R14: 0000000000000032 R15: ffffffffffffffff rcu: rcu_preempt kthread starved for 10308 jiffies! g10381 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 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:I stack:26112 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x184f/0x4c30 kernel/sched/core.c:6690 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7012 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:19 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:123 [inline] RIP: 0010:lock_release+0x175/0xa30 kernel/locking/lockdep.c:5842 Code: f7 e8 6f 30 8e 00 48 c7 c0 d0 d6 e3 93 49 39 06 0f 84 ee 04 00 00 4c 8d b4 24 b0 00 00 00 4c 89 f3 48 c1 eb 03 42 80 3c 3b 00 <74> 08 4c 89 f7 e8 31 31 8e 00 4c 89 6c 24 50 48 c7 84 24 b0 00 00 RSP: 0018:ffffc90000167780 EFLAGS: 00000246 RAX: ffffffff93e3d6d0 RBX: 1ffff9200002cf06 RCX: ffffffff81706f50 RDX: 0000000000000000 RSI: ffffffff8c610840 RDI: ffffffff8c610800 RBP: ffffc900001678b0 R08: ffffffff901d08ef R09: 1ffffffff203a11d R10: dffffc0000000000 R11: fffffbfff203a11e R12: 1ffff9200002cefc R13: ffffffff84c3b400 R14: ffffc90000167830 R15: dffffc0000000000 debug_objects_fill_pool+0xc1/0x9f0 lib/debugobjects.c:616 __debug_object_init+0xa4/0x400 lib/debugobjects.c:627 init_timer_on_stack_key kernel/time/timer.c:859 [inline] schedule_timeout+0x121/0x310 kernel/time/timer.c:2613 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.12.0-rc6-syzkaller-00005-g557329bcecc2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: wg-crypt-wg1 wg_packet_encrypt_worker RIP: 0010:usb_hcd_map_urb_for_dma+0x133/0xf90 drivers/usb/core/hcd.c:1430 Code: 00 85 ed 0f 85 b1 01 00 00 48 8b 44 24 10 48 8d 98 00 04 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 48 89 df e8 a3 b8 c6 fa 48 83 3b 00 0f 84 4d 03 00 00 48 8b RSP: 0018:ffffc90000007650 EFLAGS: 00000046 RAX: 1ffff11004f51680 RBX: ffff888027a8b400 RCX: dffffc0000000000 RDX: ffff88801c290000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff8737e781 R09: 1ffff11004d8d6d1 R10: dffffc0000000000 R11: ffffed1004d8d6d2 R12: 1ffff11005e0d0a9 R13: ffff888027a8b000 R14: 0000000000000040 R15: 0000000000000200 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000029b04000 CR4: 0000000000350ef0 Call Trace: map_urb_for_dma drivers/usb/core/hcd.c:1381 [inline] usb_hcd_submit_urb+0x314/0x1e80 drivers/usb/core/hcd.c:1531 ath9k_hif_usb_reg_in_cb+0x4ce/0x6e0 drivers/net/wireless/ath/ath9k/hif_usb.c:790 __usb_hcd_giveback_urb+0x42e/0x6e0 drivers/usb/core/hcd.c:1650 dummy_timer+0x856/0x4620 drivers/usb/gadget/udc/dummy_hcd.c:1993 __run_hrtimer kernel/time/hrtimer.c:1691 [inline] __hrtimer_run_queues+0x59d/0xd50 kernel/time/hrtimer.c:1755 hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1772 handle_softirqs+0x2c7/0x980 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:profile_hit include/linux/profile.h:50 [inline] RIP: 0010:schedule_debug kernel/sched/core.c:5910 [inline] RIP: 0010:__schedule+0x2ae/0x4c30 kernel/sched/core.c:6564 Code: 48 c7 c2 20 5e 0a 8c e8 e0 a4 a1 f5 0f 1f 44 00 00 48 c7 c0 70 0a 1d 90 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 0f 85 1b 18 00 00 83 3d d3 00 4e 04 02 0f 84 95 16 00 00 4c RSP: 0018:ffffc900000e72c0 EFLAGS: 00000216 RAX: 0000000000000000 RBX: ffffc900000e0000 RCX: dffffc0000000000 RDX: 0000000000000010 RSI: ffffffff8c0adc40 RDI: ffffffff8c610860 RBP: ffffc900000e74d0 R08: ffffc900000e745f R09: ffffc900000e7450 R10: dffffc0000000000 R11: fffff5200001ce8c R12: ffffc900000e7450 R13: ffff8880b8600000 R14: dffffc0000000000 R15: dffffc0000000000 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7012 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:wg_packet_encrypt_worker+0x30b/0x1610 Code: 24 58 e8 18 d2 61 05 48 8b 84 24 88 00 00 00 48 8d 58 30 49 89 c5 48 89 9c 24 d8 00 00 00 4c 89 e8 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 ef e8 bb 7b 8f fb 49 8b 45 00 48 89 84 24 f8 00 00 00 RSP: 0018:ffffc900000e7660 EFLAGS: 00000246 RAX: 1ffff1100f39f4c8 RBX: ffff888079cfa670 RCX: ffffffff8170bffa RDX: dffffc0000000000 RSI: ffffffff8c0acac0 RDI: ffffffff8c610860 RBP: ffffc900000e7bb0 R08: ffffffff942cd8ff R09: 1ffffffff2859b1f R10: dffffc0000000000 R11: fffffbfff2859b20 R12: 0000000000000005 R13: ffff888079cfa640 R14: ffffc900000e7b40 R15: dffffc0000000000 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup