rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P148/1:b..l P8282/1:b..l
(detected by 1, t=10502 jiffies, g=152305, q=39)
task:syz-executor.4 state:R running task stack:23984 pid: 8282 ppid: 12097 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6287
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6687
irqentry_exit+0x56/0x90 kernel/entry/common.c:425
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:mem_cgroup_from_task+0xa9/0x100 mm/memcontrol.c:871
Code: 3d 8d 99 ff 85 c0 74 23 48 83 c3 20 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 6f 44 fb ff 48 8b 03 5b 41 5e 41 5f <c3> e8 41 bc 26 08 85 c0 74 d4 80 3d cf bb f4 0b 00 75 cb c6 05 c6
RSP: 0018:ffffc900032cf6c8 EFLAGS: 00000246
RAX: ffff888140154000 RBX: ffff88807e0d3900 RCX: 0000000080000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffea000282bdc0 R08: dffffc0000000000 R09: ffffed10173a64a2
R10: ffffed10173a64a2 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff11010575a5a R14: ffff888082bad2d0 R15: 0000000000000000
get_mem_cgroup_from_mm+0xa4/0x350 mm/memcontrol.c:923
__mem_cgroup_charge+0x12/0x80 mm/memcontrol.c:6723
mem_cgroup_charge include/linux/memcontrol.h:694 [inline]
shmem_add_to_page_cache+0xc0b/0x1720 mm/shmem.c:713
shmem_getpage_gfp+0x18e0/0x3320 mm/shmem.c:1935
shmem_getpage mm/shmem.c:151 [inline]
shmem_write_begin+0xcf/0x1a0 mm/shmem.c:2469
generic_perform_write+0x2dd/0x600 mm/filemap.c:3770
__generic_file_write_iter+0x243/0x4f0 mm/filemap.c:3897
generic_file_write_iter+0xa7/0x1b0 mm/filemap.c:3929
call_write_iter include/linux/fs.h:2163 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xb11/0xe90 fs/read_write.c:594
ksys_pwrite64 fs/read_write.c:701 [inline]
__do_sys_pwrite64 fs/read_write.c:711 [inline]
__se_sys_pwrite64 fs/read_write.c:708 [inline]
__x64_sys_pwrite64+0x1b2/0x240 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f6ed053fa07
RSP: 002b:00007f6ecdb01f20 EFLAGS: 00000293 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f6ed05d6970 RCX: 00007f6ed053fa07
RDX: 000000000000ff71 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000400 R11: 0000000000000293 R12: 0000000000000004
R13: 0000000000000004 R14: 0000000020000300 R15: 0000000000000000
task:kworker/u4:2 state:R running task stack:19576 pid: 148 ppid: 2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6287
preempt_schedule_notrace+0x14d/0x190 kernel/sched/core.c:6538
preempt_schedule_notrace_thunk+0x16/0x18
rcu_read_unlock_sched_notrace include/linux/rcupdate.h:809 [inline]
trace_lock_acquire+0xb4/0x190 include/trace/events/lock.h:13
lock_acquire+0xa5/0x4d0 kernel/locking/lockdep.c:5596
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:267
rcu_read_lock include/linux/rcupdate.h:687 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:410 [inline]
batadv_nc_worker+0xc8/0x5b0 net/batman-adv/network-coding.c:721
process_one_work+0x853/0x1140 kernel/workqueue.c:2297
worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 3d 8d 99 ff 85 cmp $0x85ff998d,%eax
5: c0 74 23 48 83 shlb $0x83,0x48(%rbx,%riz,1)
a: c3 retq
b: 20 48 89 and %cl,-0x77(%rax)
e: d8 48 c1 fmuls -0x3f(%rax)
11: e8 03 42 80 3c callq 0x3c804219
16: 38 00 cmp %al,(%rax)
18: 74 08 je 0x22
1a: 48 89 df mov %rbx,%rdi
1d: e8 6f 44 fb ff callq 0xfffb4491
22: 48 8b 03 mov (%rbx),%rax
25: 5b pop %rbx
26: 41 5e pop %r14
28: 41 5f pop %r15
* 2a: c3 retq <-- trapping instruction
2b: e8 41 bc 26 08 callq 0x826bc71
30: 85 c0 test %eax,%eax
32: 74 d4 je 0x8
34: 80 3d cf bb f4 0b 00 cmpb $0x0,0xbf4bbcf(%rip) # 0xbf4bc0a
3b: 75 cb jne 0x8
3d: c6 .byte 0xc6
3e: 05 .byte 0x5
3f: c6 .byte 0xc6