rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P3192/1:b..l
(detected by 0, t=10502 jiffies, g=234965, q=54)
task:kworker/u4:19 state:R running task stack:26312 pid: 3192 ppid: 2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4900 kernel/sched/core.c:6253
preempt_schedule_notrace+0x5b/0xd0 kernel/sched/core.c:6498
preempt_schedule_notrace_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:36
rcu_read_unlock_sched_notrace include/linux/rcupdate.h:810 [inline]
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x458/0x510 kernel/locking/lockdep.c:5608
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:688 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723
process_one_work+0x9b2/0x1660 kernel/workqueue.c:2298
worker_thread+0x65d/0x1130 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: rcu_preempt kthread starved for 10497 jiffies! g234965 f0x0 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:28888 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4900 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
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: 12213 Comm: syz-executor.0 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__pvclock_read_cycles arch/x86/include/asm/pvclock.h:85 [inline]
RIP: 0010:pvclock_clocksource_read+0x177/0x530 arch/x86/kernel/pvclock.c:76
Code: c1 ef 03 0f b6 3c 2f 89 d1 44 38 de 41 0f 9e c3 40 84 f6 40 0f 95 c6 41 84 f3 0f 85 38 03 00 00 48 8b 34 24 83 e6 07 40 38 f7 <40> 0f 9e c6 40 84 ff 40 0f 95 c7 40 84 fe 0f 85 1a 03 00 00 85 d2
RSP: 0018:ffffc90000fd8ee0 EFLAGS: 00000093
RAX: 00000370388b2164 RBX: ffffffff8f173040 RCX: 00000000ffffffff
RDX: 00000000ffffffff RSI: 0000000000000003 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8f173058 R09: ffffffff8f17304f
R10: ffffffff8f173057 R11: 0000000000000001 R12: ffffffff8f173043
R13: fffffbfff1e2e609 R14: ffffffff8f17305d R15: ffffffff8f173050
FS: 00007fee7ccbc700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fe3b000 CR3: 000000001c9aa000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000001000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kvm_clock_read arch/x86/kernel/kvmclock.c:79 [inline]
kvm_sched_clock_read+0x14/0x40 arch/x86/kernel/kvmclock.c:91
sched_clock_cpu+0x15/0x1f0 kernel/sched/clock.c:371
irqtime_account_irq+0x73/0x2d0 kernel/sched/cputime.c:61
sysvec_apic_timer_interrupt+0x86/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200
Code: 48 89 ef 5d e9 d1 c0 45 00 5d be 03 00 00 00 e9 b6 35 64 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 <65> 8b 05 f9 a7 8b 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b
RSP: 0018:ffffc9000b6374c0 EFLAGS: 00000246
RAX: 0000000000040000 RBX: 0000000000000200 RCX: ffffc90002b90000
RDX: 0000000000040000 RSI: ffffffff8166af7a RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ff7aa9f
R10: ffffffff8166af70 R11: 0000000000000001 R12: ffffc9000b637540
R13: fffff520016c6ea9 R14: fffff520016c6ea8 R15: ffffc9000b637860
__seqprop_raw_spinlock_sequence include/linux/seqlock.h:276 [inline]
ktime_get_coarse_real_ts64+0xd0/0x200 kernel/time/timekeeping.c:2240
current_time+0x72/0x2c0 fs/inode.c:2324
file_update_time+0x119/0x520 fs/inode.c:1995
file_modified fs/inode.c:2035 [inline]
file_modified+0x7d/0xa0 fs/inode.c:2020
ext4_write_checks fs/ext4/file.c:247 [inline]
ext4_buffered_write_iter+0xff/0x3b0 fs/ext4/file.c:264
ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:681
call_write_iter include/linux/fs.h:2162 [inline]
do_iter_readv_writev+0x472/0x750 fs/read_write.c:725
do_iter_write+0x188/0x710 fs/read_write.c:851
vfs_iter_write+0x70/0xa0 fs/read_write.c:892
iter_file_splice_write+0x6fa/0xc10 fs/splice.c:689
do_splice_from fs/splice.c:767 [inline]
direct_splice_actor+0x110/0x180 fs/splice.c:936
splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891
do_splice_direct+0x1b3/0x280 fs/splice.c:979
do_sendfile+0xaf2/0x1250 fs/read_write.c:1245
__do_sys_sendfile64 fs/read_write.c:1310 [inline]
__se_sys_sendfile64 fs/read_write.c:1296 [inline]
__x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fee7e346e99
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:00007fee7ccbc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fee7e459f60 RCX: 00007fee7e346e99
RDX: 0000000000000000 RSI: 000000000000000e RDI: 0000000000000005
RBP: 00007fee7e3a0ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffa R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd056b7b8f R14: 00007fee7ccbc300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: c1 ef 03 shr $0x3,%edi
3: 0f b6 3c 2f movzbl (%rdi,%rbp,1),%edi
7: 89 d1 mov %edx,%ecx
9: 44 38 de cmp %r11b,%sil
c: 41 0f 9e c3 setle %r11b
10: 40 84 f6 test %sil,%sil
13: 40 0f 95 c6 setne %sil
17: 41 84 f3 test %sil,%r11b
1a: 0f 85 38 03 00 00 jne 0x358
20: 48 8b 34 24 mov (%rsp),%rsi
24: 83 e6 07 and $0x7,%esi
27: 40 38 f7 cmp %sil,%dil
* 2a: 40 0f 9e c6 setle %sil <-- trapping instruction
2e: 40 84 ff test %dil,%dil
31: 40 0f 95 c7 setne %dil
35: 40 84 fe test %dil,%sil
38: 0f 85 1a 03 00 00 jne 0x358
3e: 85 d2 test %edx,%edx