[v6.1] INFO: rcu detected stall in tc_modify_qdisc (2)
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syzbot
Nov 7, 2024, 7:04:24 PM11/7/24
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 7c15117f9468 Linux 6.1.115
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=102f8ea7980000
kernel config: https://syzkaller.appspot.com/x/.config?x=c9c0221b8515082d
dashboard link: https://syzkaller.appspot.com/bug?extid=3e756bb26a645ac581b7
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d43a49ab45a4/disk-7c15117f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d1169a6dd6d5/vmlinux-7c15117f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/cac0c99432c7/bzImage-7c15117f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3e756b...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (2 ticks this GP) idle=c8dc/1/0x4000000000000000 softirq=73095/73095 fqs=0
(detected by 0, t=10502 jiffies, g=100733, q=266 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18141 Comm: syz.1.4210 Not tainted 6.1.115-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:lock_release+0x5ed/0xa20 kernel/locking/lockdep.c:5685
Code: 14 0c 8b e8 f5 87 3c 09 b8 ff ff ff ff 65 0f c1 05 18 b4 97 7e 83 f8 01 0f 85 94 00 00 00 4c 89 f3 48 c1 eb 03 42 80 3c 3b 00 <74> 08 4c 89 f7 e8 e9 51 77 00 48 c7 84 24 90 00 00 00 00 00 00 00
RSP: 0018:ffffc900001e0b80 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff9200003c182 RCX: ffffc900001e0c03
RDX: 0000000000000001 RSI: ffffffff8b0c1440 RDI: ffffffff8b5d7540
RBP: ffffc900001e0cb0 R08: dffffc0000000000 R09: fffffbfff1d34076
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200003c17c
R13: 0000000000000046 R14: ffffc900001e0c10 R15: dffffc0000000000
FS: 00007f2e58be26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e58be1f98 CR3: 000000005d98f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x75/0x130 kernel/locking/spinlock.c:194
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4b0/0xe50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lockdep_unregister_key+0x562/0x600 kernel/locking/lockdep.c:6367
Code: 1e 91 48 c7 c6 20 ea 6a 81 e8 0a b4 08 00 e8 45 c8 08 00 e9 ea fb ff ff e8 bb 49 3c 09 41 f7 c7 00 02 00 00 74 d0 fb 45 84 f6 <75> cf eb e0 0f 0b 45 31 f6 e9 64 ff ff ff 0f 0b e9 a5 fe ff ff 0f
RSP: 0018:ffffc9000329ef80 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff92000653df8 RCX: ffffffff97337103
RDX: 0000000000000001 RSI: ffffffff8b0c0fa0 RDI: ffffffff8b5d7540
RBP: ffffc9000329f048 R08: dffffc0000000000 R09: fffffbfff223c497
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc9000329efc0
R13: 1ffff92000653df4 R14: 0000000000000000 R15: 0000000000000206
__qdisc_destroy+0x127/0x450 net/sched/sch_generic.c:1078
taprio_attach+0x260/0x420 net/sched/sch_taprio.c:1844
qdisc_graft+0x12e5/0x1610 net/sched/sch_api.c:1143
tc_modify_qdisc+0xf29/0x1d70 net/sched/sch_api.c:1767
rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6150
netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2519
___sys_sendmsg net/socket.c:2573 [inline]
__sys_sendmsg+0x2a9/0x390 net/socket.c:2602
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2e57d7e719
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2e58be2038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2e57f35f80 RCX: 00007f2e57d7e719
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004
RBP: 00007f2e57df139e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2e57f35f80 R15: 00007ffef7f87c98
</TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g100733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=49310
rcu: rcu_preempt kthread starved for 10502 jiffies! g100733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:25528 pid:16 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</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 PID: 18141 Comm: syz.1.4210 Not tainted 6.1.115-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_acquire+0xdcd/0x1f80
Code: 84 c0 0f 85 62 0c 00 00 8b 1b 48 8b 44 24 30 0f b6 04 38 84 c0 0f 85 76 0c 00 00 48 8b 44 24 08 33 18 f7 c3 00 60 00 00 74 0d <41> bd 01 00 00 00 49 c7 c7 ff ff ff ff 48 8b 44 24 30 0f b6 04 38
RSP: 0018:ffffc900001e0a60 EFLAGS: 00000006
RAX: ffff88802778c6a8 RBX: 0000000000084c36 RCX: ffff88802778c660
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff88802778c688 R08: dffffc0000000000 R09: fffffbfff224607e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88802778c658
R13: 0000000000000000 R14: ffff88802778c6a8 R15: fb268dbe5ff7dd64
FS: 00007f2e58be26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e58be1f98 CR3: 000000005d98f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
advance_sched+0x47/0x970 net/sched/sch_taprio.c:700
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lockdep_unregister_key+0x562/0x600 kernel/locking/lockdep.c:6367
Code: 1e 91 48 c7 c6 20 ea 6a 81 e8 0a b4 08 00 e8 45 c8 08 00 e9 ea fb ff ff e8 bb 49 3c 09 41 f7 c7 00 02 00 00 74 d0 fb 45 84 f6 <75> cf eb e0 0f 0b 45 31 f6 e9 64 ff ff ff 0f 0b e9 a5 fe ff ff 0f
RSP: 0018:ffffc9000329ef80 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff92000653df8 RCX: ffffffff97337103
RDX: 0000000000000001 RSI: ffffffff8b0c0fa0 RDI: ffffffff8b5d7540
RBP: ffffc9000329f048 R08: dffffc0000000000 R09: fffffbfff223c497
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc9000329efc0
R13: 1ffff92000653df4 R14: 0000000000000000 R15: 0000000000000206
__qdisc_destroy+0x127/0x450 net/sched/sch_generic.c:1078
taprio_attach+0x260/0x420 net/sched/sch_taprio.c:1844
qdisc_graft+0x12e5/0x1610 net/sched/sch_api.c:1143
tc_modify_qdisc+0xf29/0x1d70 net/sched/sch_api.c:1767
rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6150
netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2519
___sys_sendmsg net/socket.c:2573 [inline]
__sys_sendmsg+0x2a9/0x390 net/socket.c:2602
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2e57d7e719
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2e58be2038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2e57f35f80 RCX: 00007f2e57d7e719
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004
RBP: 00007f2e57df139e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2e57f35f80 R15: 00007ffef7f87c98
</TASK>
---
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syzbot found the following issue on:
HEAD commit: 7c15117f9468 Linux 6.1.115
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=102f8ea7980000
kernel config: https://syzkaller.appspot.com/x/.config?x=c9c0221b8515082d
dashboard link: https://syzkaller.appspot.com/bug?extid=3e756bb26a645ac581b7
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d43a49ab45a4/disk-7c15117f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d1169a6dd6d5/vmlinux-7c15117f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/cac0c99432c7/bzImage-7c15117f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3e756b...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (2 ticks this GP) idle=c8dc/1/0x4000000000000000 softirq=73095/73095 fqs=0
(detected by 0, t=10502 jiffies, g=100733, q=266 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18141 Comm: syz.1.4210 Not tainted 6.1.115-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:lock_release+0x5ed/0xa20 kernel/locking/lockdep.c:5685
Code: 14 0c 8b e8 f5 87 3c 09 b8 ff ff ff ff 65 0f c1 05 18 b4 97 7e 83 f8 01 0f 85 94 00 00 00 4c 89 f3 48 c1 eb 03 42 80 3c 3b 00 <74> 08 4c 89 f7 e8 e9 51 77 00 48 c7 84 24 90 00 00 00 00 00 00 00
RSP: 0018:ffffc900001e0b80 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff9200003c182 RCX: ffffc900001e0c03
RDX: 0000000000000001 RSI: ffffffff8b0c1440 RDI: ffffffff8b5d7540
RBP: ffffc900001e0cb0 R08: dffffc0000000000 R09: fffffbfff1d34076
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200003c17c
R13: 0000000000000046 R14: ffffc900001e0c10 R15: dffffc0000000000
FS: 00007f2e58be26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e58be1f98 CR3: 000000005d98f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x75/0x130 kernel/locking/spinlock.c:194
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4b0/0xe50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lockdep_unregister_key+0x562/0x600 kernel/locking/lockdep.c:6367
Code: 1e 91 48 c7 c6 20 ea 6a 81 e8 0a b4 08 00 e8 45 c8 08 00 e9 ea fb ff ff e8 bb 49 3c 09 41 f7 c7 00 02 00 00 74 d0 fb 45 84 f6 <75> cf eb e0 0f 0b 45 31 f6 e9 64 ff ff ff 0f 0b e9 a5 fe ff ff 0f
RSP: 0018:ffffc9000329ef80 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff92000653df8 RCX: ffffffff97337103
RDX: 0000000000000001 RSI: ffffffff8b0c0fa0 RDI: ffffffff8b5d7540
RBP: ffffc9000329f048 R08: dffffc0000000000 R09: fffffbfff223c497
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc9000329efc0
R13: 1ffff92000653df4 R14: 0000000000000000 R15: 0000000000000206
__qdisc_destroy+0x127/0x450 net/sched/sch_generic.c:1078
taprio_attach+0x260/0x420 net/sched/sch_taprio.c:1844
qdisc_graft+0x12e5/0x1610 net/sched/sch_api.c:1143
tc_modify_qdisc+0xf29/0x1d70 net/sched/sch_api.c:1767
rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6150
netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2519
___sys_sendmsg net/socket.c:2573 [inline]
__sys_sendmsg+0x2a9/0x390 net/socket.c:2602
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2e57d7e719
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2e58be2038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2e57f35f80 RCX: 00007f2e57d7e719
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004
RBP: 00007f2e57df139e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2e57f35f80 R15: 00007ffef7f87c98
</TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g100733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=49310
rcu: rcu_preempt kthread starved for 10502 jiffies! g100733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:25528 pid:16 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</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 PID: 18141 Comm: syz.1.4210 Not tainted 6.1.115-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_acquire+0xdcd/0x1f80
Code: 84 c0 0f 85 62 0c 00 00 8b 1b 48 8b 44 24 30 0f b6 04 38 84 c0 0f 85 76 0c 00 00 48 8b 44 24 08 33 18 f7 c3 00 60 00 00 74 0d <41> bd 01 00 00 00 49 c7 c7 ff ff ff ff 48 8b 44 24 30 0f b6 04 38
RSP: 0018:ffffc900001e0a60 EFLAGS: 00000006
RAX: ffff88802778c6a8 RBX: 0000000000084c36 RCX: ffff88802778c660
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff88802778c688 R08: dffffc0000000000 R09: fffffbfff224607e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88802778c658
R13: 0000000000000000 R14: ffff88802778c6a8 R15: fb268dbe5ff7dd64
FS: 00007f2e58be26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e58be1f98 CR3: 000000005d98f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
advance_sched+0x47/0x970 net/sched/sch_taprio.c:700
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lockdep_unregister_key+0x562/0x600 kernel/locking/lockdep.c:6367
Code: 1e 91 48 c7 c6 20 ea 6a 81 e8 0a b4 08 00 e8 45 c8 08 00 e9 ea fb ff ff e8 bb 49 3c 09 41 f7 c7 00 02 00 00 74 d0 fb 45 84 f6 <75> cf eb e0 0f 0b 45 31 f6 e9 64 ff ff ff 0f 0b e9 a5 fe ff ff 0f
RSP: 0018:ffffc9000329ef80 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff92000653df8 RCX: ffffffff97337103
RDX: 0000000000000001 RSI: ffffffff8b0c0fa0 RDI: ffffffff8b5d7540
RBP: ffffc9000329f048 R08: dffffc0000000000 R09: fffffbfff223c497
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc9000329efc0
R13: 1ffff92000653df4 R14: 0000000000000000 R15: 0000000000000206
__qdisc_destroy+0x127/0x450 net/sched/sch_generic.c:1078
taprio_attach+0x260/0x420 net/sched/sch_taprio.c:1844
qdisc_graft+0x12e5/0x1610 net/sched/sch_api.c:1143
tc_modify_qdisc+0xf29/0x1d70 net/sched/sch_api.c:1767
rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6150
netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2519
___sys_sendmsg net/socket.c:2573 [inline]
__sys_sendmsg+0x2a9/0x390 net/socket.c:2602
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2e57d7e719
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2e58be2038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2e57f35f80 RCX: 00007f2e57d7e719
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004
RBP: 00007f2e57df139e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2e57f35f80 R15: 00007ffef7f87c98
</TASK>
---
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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
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If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
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
syzbot
Dec 14, 2024, 7:36:27 AM12/14/24
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: e4d90d63d385 Linux 6.1.119
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10530344580000
kernel config: https://syzkaller.appspot.com/x/.config?x=5516a02be29a5649
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=103c3a0f980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/19f991f20183/disk-e4d90d63.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/61eb5f055f38/vmlinux-e4d90d63.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0ddd97416681/bzImage-e4d90d63.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3e756b...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-...D } 2635 jiffies s: 701 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
RIP: 0010:lock_acquire+0xf3/0x5a0 kernel/locking/lockdep.c:5633
Code: 0d 0f 86 e4 02 00 00 89 db 48 89 d8 48 c1 e8 06 48 8d 3c c5 a8 f7 9a 8e be 08 00 00 00 e8 a5 84 77 00 48 0f a3 1d a5 55 30 0d <73> 0d e8 96 e5 08 00 84 c0 0f 84 b9 02 00 00 48 c7 c0 74 2c 9b 8e
RSP: 0018:ffffc900001e0b60 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff816aa1fb
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e9af7a8
RBP: ffffc900001e0ca8 R08: dffffc0000000000 R09: fffffbfff1d35ef6
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200003c174
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007fc2353586c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
_raw_spin_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1693 [inline]
__hrtimer_run_queues+0x6d3/0xe50 kernel/time/hrtimer.c:1753
RSP: 0018:ffffc90003d56f80 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff920007aadf8 RCX: ffffffff97353103
RDX: 0000000000000001 RSI: ffffffff8b0c0ea0 RDI: ffffffff8b5e6200
RBP: ffffc90003d57048 R08: dffffc0000000000 R09: fffffbfff223f93e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90003d56fc0
R13: 1ffff920007aadf4 R14: 0000000000000000 R15: 0000000000000203
netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1337
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1859
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 1f 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc235358168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc2354331c8 RCX: 00007fc2353a8a89
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc2354331cc
R13: 000000000000000b R14: 00007fff857dfaa0 R15: 00007fff857dfb88
</TASK>
---
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.
HEAD commit: e4d90d63d385 Linux 6.1.119
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10530344580000
kernel config: https://syzkaller.appspot.com/x/.config?x=5516a02be29a5649
dashboard link: https://syzkaller.appspot.com/bug?extid=3e756bb26a645ac581b7
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=1072dcdf980000
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=103c3a0f980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/19f991f20183/disk-e4d90d63.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/61eb5f055f38/vmlinux-e4d90d63.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0ddd97416681/bzImage-e4d90d63.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3e756b...@syzkaller.appspotmail.com
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4255 Comm: syz-executor207 Not tainted 6.1.119-syzkaller #0
NMI backtrace for cpu 1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline]
RIP: 0010:lock_acquire+0xf3/0x5a0 kernel/locking/lockdep.c:5633
Code: 0d 0f 86 e4 02 00 00 89 db 48 89 d8 48 c1 e8 06 48 8d 3c c5 a8 f7 9a 8e be 08 00 00 00 e8 a5 84 77 00 48 0f a3 1d a5 55 30 0d <73> 0d e8 96 e5 08 00 84 c0 0f 84 b9 02 00 00 48 c7 c0 74 2c 9b 8e
RSP: 0018:ffffc900001e0b60 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff816aa1fb
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e9af7a8
RBP: ffffc900001e0ca8 R08: dffffc0000000000 R09: fffffbfff1d35ef6
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200003c174
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007fc2353586c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001600 CR3: 000000001dbdf000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
_raw_spin_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1693 [inline]
__hrtimer_run_queues+0x6d3/0xe50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lockdep_unregister_key+0x562/0x600 kernel/locking/lockdep.c:6367
Code: 1f 91 48 c7 c6 c0 f2 6a 81 e8 0a b4 08 00 e8 45 c8 08 00 e9 ea fb ff ff e8 3b e1 46 09 41 f7 c7 00 02 00 00 74 d0 fb 45 84 f6 <75> cf eb e0 0f 0b 45 31 f6 e9 64 ff ff ff 0f 0b e9 a5 fe ff ff 0f
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lockdep_unregister_key+0x562/0x600 kernel/locking/lockdep.c:6367
RSP: 0018:ffffc90003d56f80 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff920007aadf8 RCX: ffffffff97353103
RDX: 0000000000000001 RSI: ffffffff8b0c0ea0 RDI: ffffffff8b5e6200
RBP: ffffc90003d57048 R08: dffffc0000000000 R09: fffffbfff223f93e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90003d56fc0
R13: 1ffff920007aadf4 R14: 0000000000000000 R15: 0000000000000203
__qdisc_destroy+0x127/0x450 net/sched/sch_generic.c:1078
taprio_attach+0x260/0x420 net/sched/sch_taprio.c:1844
qdisc_graft+0x12e5/0x1610 net/sched/sch_api.c:1143
tc_modify_qdisc+0xf29/0x1d70 net/sched/sch_api.c:1767
rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6150
netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2493
taprio_attach+0x260/0x420 net/sched/sch_taprio.c:1844
qdisc_graft+0x12e5/0x1610 net/sched/sch_api.c:1143
tc_modify_qdisc+0xf29/0x1d70 net/sched/sch_api.c:1767
rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6150
netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1337
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1859
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2519
___sys_sendmsg net/socket.c:2573 [inline]
__sys_sendmsg+0x2a9/0x390 net/socket.c:2602
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc2353a8a89
__sock_sendmsg net/socket.c:730 [inline]
____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2519
___sys_sendmsg net/socket.c:2573 [inline]
__sys_sendmsg+0x2a9/0x390 net/socket.c:2602
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 1f 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc235358168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc2354331c8 RCX: 00007fc2353a8a89
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004
RBP: 00007fc2354331c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc2354331cc
R13: 000000000000000b R14: 00007fff857dfaa0 R15: 00007fff857dfb88
</TASK>
---
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.
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