syzbot


INFO: rcu detected stall in retint_kernel

Status: auto-closed as invalid on 2021/12/03 22:18
Reported-by: syzbot+4d76acf78db0ad9430e8@syzkaller.appspotmail.com
First crash: 986d, last: 986d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: rcu detected stall in retint_kernel (2) 1 442d 442d 0/1 upstream: reported on 2023/02/01 07:36
upstream INFO: rcu detected stall in retint_kernel kernel 21 1512d 1879d 0/26 auto-closed as invalid on 2020/05/26 14:03

Sample crash report:
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=24e/1/0x4000000000000004 softirq=50048/50050 fqs=5246 
rcu: 	(detected by 1, t=10502 jiffies, g=57149, q=1733)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 26210 Comm: syz-executor.0 Not tainted 4.19.201-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rcu_lock_acquire include/linux/rcupdate.h:242 [inline]
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:627 [inline]
RIP: 0010:__perf_output_begin kernel/events/ring_buffer.c:156 [inline]
RIP: 0010:perf_output_begin_forward+0xc3/0xbf0 kernel/events/ring_buffer.c:262
Code: f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 c8 31 c0 e8 61 98 e8 ff e8 dc 1f d7 ff e8 57 98 e8 ff 45 31 c9 45 31 c0 31 d2 31 f6 <b9> 02 00 00 00 68 80 e9 79 81 48 c7 c7 60 5f f8 89 e8 a7 66 d1 ff
RSP: 0000:ffff8880ba006bc0 EFLAGS: 00000046
RAX: ffff8880434e0440 RBX: 0000000000002890 RCX: 1ffff11017400d8c
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880434e07b0
RBP: ffff8880ba006ef0 R08: 0000000000000000 R09: 0000000000000000
R10: ffff8880ba006f20 R11: 0000000000074071 R12: ffff888046045380
R13: ffff8880ba007180 R14: ffff8880ba027748 R15: ffff8880ba006f40
FS:  00007f0d05437700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000235f41000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __perf_event_output kernel/events/core.c:6618 [inline]
 perf_event_output_forward+0x108/0x270 kernel/events/core.c:6634
 __perf_event_overflow+0x13c/0x370 kernel/events/core.c:7907
 perf_swevent_overflow kernel/events/core.c:7983 [inline]
 perf_swevent_event+0x347/0x550 kernel/events/core.c:8011
 perf_tp_event+0x29f/0xaa0 kernel/events/core.c:8439
 perf_trace_run_bpf_submit+0x144/0x220 kernel/events/core.c:8413
 perf_trace_preemptirq_template+0x2df/0x460 include/trace/events/preemptirq.h:14
 trace_irq_disable_rcuidle include/trace/events/preemptirq.h:36 [inline]
 trace_hardirqs_off_caller kernel/trace/trace_preemptirq.c:68 [inline]
 trace_hardirqs_off_caller+0x173/0x210 kernel/trace/trace_preemptirq.c:60
 trace_hardirqs_off_thunk+0x1a/0x1c
 interrupt_entry+0xb8/0xb9 arch/x86/entry/entry_64.S:642
RIP: 0010:kernel_text_address+0x70/0xf0 kernel/extable.c:160
Code: 00 00 83 3d e5 82 e7 09 01 76 20 e8 3a 6e 12 00 84 c0 74 32 48 89 ef e8 4e ee 1a 00 84 c0 74 4f 48 83 c4 08 b8 01 00 00 00 5d <c3> 48 81 fd 00 70 37 8c 72 d7 48 81 fd 86 61 50 8c 72 e3 e8 08 6e
RSP: 0000:ffff8880ba007678 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff09
RAX: 0000000000000001 RBX: ffffffff8708dcab RCX: 0000000000000000
RDX: 1ffff11017400ee0 RSI: ffff8880ba007518 RDI: ffffffff8708dcab
RBP: ffff8880ba007700 R08: 0000000000000001 R09: 0000000000000001
R10: ffff8880ba007717 R11: 0000000000074071 R12: ffff8880ba007750
R13: 0000000000000000 R14: ffff888235f31080 R15: 00000000000000f0
 __kernel_text_address+0x9/0x30 kernel/extable.c:107
 unwind_get_return_address arch/x86/kernel/unwind_orc.c:297 [inline]
 unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:292
 __save_stack_trace+0xaf/0x190 arch/x86/kernel/stacktrace.c:45
 save_stack mm/kasan/kasan.c:448 [inline]
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553
 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559
 dst_alloc+0x106/0x1a0 net/core/dst.c:105
 ip6_dst_alloc+0x2e/0x100 net/ipv6/route.c:357
 icmp6_dst_alloc+0x1ab/0x660 net/ipv6/route.c:2731
 ndisc_send_skb+0xd10/0x1720 net/ipv6/ndisc.c:471
 ndisc_send_rs+0x131/0x690 net/ipv6/ndisc.c:685
 addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835
 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
 __run_timers kernel/time/timer.c:1696 [inline]
 run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709
 __do_softirq+0x265/0x980 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x215/0x260 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
 </IRQ>
RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3744
Code: 00 00 e8 7d 3c 29 f9 e8 58 76 4f f9 4c 89 e8 48 c1 e8 03 80 3c 18 00 75 69 48 83 3d 7b 52 d9 01 00 74 5b fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 40 d1 ff ff 48 c7 c0 90 82 f1 89 48 c1 e8 03 80
RSP: 0000:ffff88823a847e20 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880434e0cc4
RBP: ffffed100869c088 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880434e0440
R13: ffffffff89f18298 R14: 0000000000000000 R15: 0000000000000000
 retint_kernel+0x1b/0x2d
RIP: 0010:exit_to_usermode_loop+0x65/0x2a0 arch/x86/entry/common.c:152
Code: f1 89 48 c1 e8 03 80 3c 28 00 0f 85 0b 02 00 00 48 83 3d a5 2a f1 08 00 0f 84 e0 01 00 00 e8 92 2a 62 00 fb 66 0f 1f 44 00 00 <41> 89 df 31 ff 41 83 e7 08 44 89 fe e8 ea 2b 62 00 45 85 ff 0f 85
RSP: 0000:ffff88823a847ef8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: 0000000010000008 RCX: ffffc90005c2a000
RDX: 0000000000040000 RSI: ffffffff810057fe RDI: ffff8880434e0cc4
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88823a847f58
R13: ffffed100869c088 R14: ffff8880434e0440 R15: 0000000000000000
 prepare_exit_to_usermode+0x277/0x2d0 arch/x86/entry/common.c:198
 retint_user+0x8/0x18
RIP: 0033:0x4665e9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0d05437218 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 000000000056bf88 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 00007ffc9c85f92f R14: 00007f0d05437300 R15: 0000000000022000

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/08/05 22:17 linux-4.19.y 6ca2f514c578 d2d6e680 .config console log report info ci2-linux-4-19 INFO: rcu detected stall in retint_kernel
* Struck through repros no longer work on HEAD.