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INFO: rcu detected stall (3)

Status: closed as invalid on 2018/02/06 13:57
Subsystems: block
[Documentation on labels]
Reported-by: syzbot+2f22c0d4f48a25a73c6c6816acd1fb9f22bf1e4a@syzkaller.appspotmail.com
First crash: 2530d, last: 2490d
▶ ▼ Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall C 15 2551d 2636d 0/28 closed as invalid on 2017/10/21 09:19
upstream INFO: rcu detected stall (2) net C 56 2530d 2541d 3/28 fixed on 2017/11/11 01:37
android-49 INFO: rcu detected stall C 1 2460d 2010d 0/3 public: reported C repro on 2019/04/14 08:51
android-44 INFO: rcu detected stall 8 2444d 2451d 0/2 auto-closed as invalid on 2019/02/22 15:39

Sample crash report:
INFO: rcu_sched self-detected stall on CPU
INFO: rcu_sched detected stalls on CPUs/tasks:
	0-....: (125000 ticks this GP) idle=612/140000000000001/0 softirq=82103/82103 fqs=31241 
	(detected by 1, t=125002 jiffies, g=44675, c=44674, q=411)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 26253 Comm: syz-executor2 Not tainted 4.15.0-rc2+ #209
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:inb arch/x86/include/asm/io.h:348 [inline]
RIP: 0010:io_serial_in+0x6b/0x90 drivers/tty/serial/8250/8250_port.c:434
RSP: 0018:ffff8801db406ff8 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000005 RDI: ffffffff87ced9c0
RBP: ffff8801db407008 R08: 0000000000000002 R09: 000000000000000c
R10: 0000000000000000 R11: ffffffff87489d60 R12: ffffffff87ced980
R13: 0000000000000020 R14: fffffbfff0f9db77 R15: fffffbfff0f9db3a
FS:  00007f4e91b22700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001ab4cd8 CR3: 00000001978a3000 CR4: 00000000001406f0
Call Trace:
 <IRQ>
 serial_in drivers/tty/serial/8250/8250.h:111 [inline]
 wait_for_xmitr+0x93/0x1e0 drivers/tty/serial/8250/8250_port.c:2033
 serial8250_console_putchar+0x1f/0x60 drivers/tty/serial/8250/8250_port.c:3170
 uart_console_write+0xac/0xe0 drivers/tty/serial/serial_core.c:1858
 serial8250_console_write+0x647/0xa20 drivers/tty/serial/8250/8250_port.c:3236
 univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:590
 call_console_drivers kernel/printk/printk.c:1574 [inline]
 console_unlock+0x788/0xd80 kernel/printk/printk.c:2233
 vprintk_emit+0x4ad/0x590 kernel/printk/printk.c:1757
 vprintk_default+0x28/0x30 kernel/printk/printk.c:1796
 vprintk_func+0x57/0xc0 kernel/printk/printk_safe.c:379
 printk+0xaa/0xca kernel/printk/printk.c:1829
 print_cpu_stall_info_begin kernel/rcu/tree_plugin.h:1657 [inline]
 print_cpu_stall kernel/rcu/tree.c:1594 [inline]
 check_cpu_stall.isra.64+0x845/0x15b0 kernel/rcu/tree.c:1676
 __rcu_pending kernel/rcu/tree.c:3440 [inline]
 rcu_pending kernel/rcu/tree.c:3502 [inline]
 rcu_check_callbacks+0x256/0xd00 kernel/rcu/tree.c:2842
 update_process_times+0x30/0x60 kernel/time/timer.c:1630
 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162
 tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1166
 __run_hrtimer kernel/time/hrtimer.c:1211 [inline]
 __hrtimer_run_queues+0x349/0xe10 kernel/time/hrtimer.c:1275
 hrtimer_interrupt+0x1d4/0x5f0 kernel/time/hrtimer.c:1309
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050
 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:795
 </IRQ>
RIP: 0010:loop_set_fd drivers/block/loop.c:882 [inline]
RIP: 0010:lo_ioctl+0x5a2/0x1b90 drivers/block/loop.c:1358
RSP: 0018:ffff8801b2217aa0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff11
RAX: 0000000000010000 RBX: dffffc0000000000 RCX: ffffffff838b2962
RDX: 0000000000010000 RSI: ffffc90002131000 RDI: ffff8801cf6bba04
RBP: ffff8801b2217b18 R08: ffffffff85f445c0 R09: 1ffff10036442efd
R10: ffff8801c86e4500 R11: 0000000000000001 R12: ffff8801cf6bb9b8
R13: ffff8801d46544c0 R14: ffff8801d6b717c0 R15: ffff8801d4654618
 __blkdev_driver_ioctl block/ioctl.c:303 [inline]
 blkdev_ioctl+0x1759/0x1e00 block/ioctl.c:601
 block_ioctl+0xea/0x130 fs/block_dev.c:1860
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4529d9
RSP: 002b:00007f4e91b21c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 00000000004529d9
RDX: 0000000000000018 RSI: 0000000000004c00 RDI: 0000000000000017
RBP: 000000000000005b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ed928
R13: 00000000ffffffff R14: 00007f4e91b226d4 R15: 0000000000000000
Code: 24 d9 00 00 00 49 8d 7c 24 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 d3 e3 80 3c 02 00 75 17 41 03 5c 24 40 89 da ec <5b> 0f b6 c0 41 5c 5d c3 e8 78 cd 18 ff eb c2 e8 d1 cd 18 ff eb 
	0-....: (125000 ticks this GP) idle=612/140000000000001/0 softirq=82103/82103 fqs=31403 
	 (t=125659 jiffies g=44675 c=44674 q=411)
NMI backtrace for cpu 0
CPU: 0 PID: 26253 Comm: syz-executor2 Not tainted 4.15.0-rc2+ #209
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103
 nmi_trigger_cpumask_backtrace+0x122/0x180 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:156 [inline]
 rcu_dump_cpu_stacks+0x186/0x1d5 kernel/rcu/tree.c:1459
 print_cpu_stall kernel/rcu/tree.c:1608 [inline]
 check_cpu_stall.isra.64+0xbb8/0x15b0 kernel/rcu/tree.c:1676
 __rcu_pending kernel/rcu/tree.c:3440 [inline]
 rcu_pending kernel/rcu/tree.c:3502 [inline]
 rcu_check_callbacks+0x256/0xd00 kernel/rcu/tree.c:2842
 update_process_times+0x30/0x60 kernel/time/timer.c:1630
 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162
 tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1166
 __run_hrtimer kernel/time/hrtimer.c:1211 [inline]
 __hrtimer_run_queues+0x349/0xe10 kernel/time/hrtimer.c:1275
 hrtimer_interrupt+0x1d4/0x5f0 kernel/time/hrtimer.c:1309
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050
 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:795
 </IRQ>
RIP: 0010:loop_set_fd drivers/block/loop.c:882 [inline]
RIP: 0010:lo_ioctl+0x5a2/0x1b90 drivers/block/loop.c:1358
RSP: 0018:ffff8801b2217aa0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff11
RAX: 0000000000010000 RBX: dffffc0000000000 RCX: ffffffff838b2962
RDX: 0000000000010000 RSI: ffffc90002131000 RDI: ffff8801cf6bba04
RBP: ffff8801b2217b18 R08: ffffffff85f445c0 R09: 1ffff10036442efd
R10: ffff8801c86e4500 R11: 0000000000000001 R12: ffff8801cf6bb9b8
R13: ffff8801d46544c0 R14: ffff8801d6b717c0 R15: ffff8801d4654618
 __blkdev_driver_ioctl block/ioctl.c:303 [inline]
 blkdev_ioctl+0x1759/0x1e00 block/ioctl.c:601
 block_ioctl+0xea/0x130 fs/block_dev.c:1860
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4529d9
RSP: 002b:00007f4e91b21c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 00000000004529d9
RDX: 0000000000000018 RSI: 0000000000004c00 RDI: 0000000000000017
RBP: 000000000000005b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ed928
R13: 00000000ffffffff R14: 00007f4e91b226d4 R15: 0000000000000000

Crashes (239):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2017/12/06 03:01 upstream 328b4ed93b69 0796857b .config console log report ci-upstream-kasan-gce
2017/12/01 00:58 upstream a0908a1b7d68 5153aeaf .config console log report ci-upstream-kasan-gce
2017/12/01 00:53 upstream a0908a1b7d68 5153aeaf .config console log report ci-upstream-kasan-gce
2017/11/30 23:49 upstream a0908a1b7d68 5153aeaf .config console log report ci-upstream-kasan-gce
2017/11/30 18:36 upstream a0908a1b7d68 5153aeaf .config console log report ci-upstream-kasan-gce
2017/11/30 16:01 upstream a0908a1b7d68 5153aeaf .config console log report ci-upstream-kasan-gce
2017/12/09 05:25 upstream 3625de4b2872 5ad0ce95 .config console log report ci-upstream-kasan-gce-386
2017/12/08 18:39 upstream 3625de4b2872 b0fa969c .config console log report ci-upstream-kasan-gce-386
2017/12/05 13:22 upstream fd6d2e506ce6 de212f1a .config console log report ci-upstream-kasan-gce-386
2017/12/03 18:57 upstream ae64f9bd1d36 48359b97 .config console log report ci-upstream-kasan-gce-386
2017/12/03 14:21 upstream 2db767d9889c 48359b97 .config console log report ci-upstream-kasan-gce-386
2017/11/30 06:45 upstream ef0010a30935 29b0fd90 .config console log report ci-upstream-kasan-gce-386
2017/11/30 02:47 upstream ef0010a30935 29b0fd90 .config console log report ci-upstream-kasan-gce-386
2017/11/29 06:11 upstream 43570f0383d6 34f2c233 .config console log report ci-upstream-kasan-gce-386
2017/11/29 03:57 upstream 43570f0383d6 34f2c233 .config console log report ci-upstream-kasan-gce-386
2017/11/29 00:59 upstream 43f462f1c2e1 ac93d7e1 .config console log report ci-upstream-kasan-gce-386
2017/12/21 04:42 mmots 75aa5540627f 90a46995 .config console log report ci-upstream-mmots-kasan-gce
2017/12/09 02:47 linux-next ad4dac17f9d5 5ad0ce95 .config console log report ci-upstream-next-kasan-gce
2017/12/08 10:10 linux-next ad4dac17f9d5 5d643f8e .config console log report ci-upstream-next-kasan-gce
2017/12/04 10:55 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/03 10:39 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/02 23:40 linux-next fb20eb9d798d 16668351 .config console log report ci-upstream-next-kasan-gce
2017/12/02 21:29 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/02 15:07 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/02 11:38 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/02 03:01 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/02 00:12 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/02 00:06 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/01 19:58 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/01 19:23 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/01 18:54 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/01 08:52 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/12/01 06:36 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/11/30 22:08 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/11/30 21:01 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/11/30 20:58 mmots 4131d5166185 29b0fd90 .config console log report ci-upstream-mmots-kasan-gce
2017/11/30 20:21 linux-next 11fed7829bef 29b0fd90 .config console log report ci-upstream-next-kasan-gce
2017/11/30 04:52 linux-next 11fed7829bef 29b0fd90 .config console log report ci-upstream-next-kasan-gce
2017/11/29 21:47 linux-next d127129e85a0 29b0fd90 .config console log report ci-upstream-next-kasan-gce
2017/11/28 22:27 mmots dbf9f9124937 1808de66 .config console log report ci-upstream-mmots-kasan-gce
* Struck through repros no longer work on HEAD.