GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8390/1:b..l
rcu: (detected by 0, t=10505 jiffies, g=20749, q=340 ncpus=2)
task:syz.3.615 state:R running task stack:25888 pid:8390 tgid:8389 ppid:5819 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6935
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1705 [inline]
zap_pmd_range mm/memory.c:1753 [inline]
zap_pud_range mm/memory.c:1782 [inline]
zap_p4d_range mm/memory.c:1803 [inline]
unmap_page_range+0xb87/0x3d10 mm/memory.c:1824
unmap_single_vma+0x194/0x2b0 mm/memory.c:1870
unmap_vmas+0x22f/0x490 mm/memory.c:1914
exit_mmap+0x1c6/0xb20 mm/mmap.c:1668
__mmput+0x12a/0x4c0 kernel/fork.c:1348
mmput+0x62/0x70 kernel/fork.c:1370
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9ba/0x2d70 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3017
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8bfab85d29
RSP: 002b:00007f8bfb985038 EFLAGS: 00000246 ORIG_RAX: 0000000000000095
RAX: fffffffffffffffc RBX: 00007f8bfad75fa0 RCX: 00007f8bfab85d29
RDX: 0000000000000000 RSI: 0000000000800000 RDI: 0000000020000000
RBP: 00007f8bfac01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8bfad75fa0 R15: 00007fff796495c8
rcu: rcu_preempt kthread timer wakeup didn't happen for 10500 jiffies! g20749 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=16948
rcu: rcu_preempt kthread starved for 10501 jiffies! g20749 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:25552 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8402 Comm: syz-executor Not tainted 6.13.0-rc5-syzkaller-00004-gccb98ccef0e5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_acquire+0x2a6/0x3c40 kernel/locking/lockdep.c:5159
Code: 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 03 2b 00 00 41 0f b7 47 20 49 8d 7f 08 48 89 fa 48 c1 ea 03 <66> 25 00 e0 44 09 f0 66 41 89 47 20 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90000a18b48 EFLAGS: 00000802
RAX: 0000000000004d65 RBX: 0000000000000001 RCX: 0000000000000002
RDX: 1ffff110057e15f4 RSI: 1ffff110057e15f2 RDI: ffff88802bf0afa0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 000000000000000f R11: 0000000000000003 R12: ffffffff8e1bb900
R13: ffff88802bf0a440 R14: 0000000000000021 R15: ffff88802bf0af98
FS: 0000555575978500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb35a23ab00 CR3: 0000000063954000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
advance_sched+0x67f/0xc60 net/sched/sch_taprio.c:985
__run_hrtimer kernel/time/hrtimer.c:1739 [inline]
__hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:211 [inline]
RIP: 0010:unwind_next_frame+0x1a0/0x20c0 arch/x86/kernel/unwind_orc.c:494
Code: 4d 02 00 00 49 81 ff 00 00 60 8b 0f 83 40 02 00 00 8b 35 c3 41 5e 0c 4c 89 f8 48 2d 00 00 00 81 48 c1 e8 08 41 89 c3 8d 56 ff <39> d0 0f 83 09 15 00 00 48 ba 00 00 00 00 00 fc ff df 89 c1 48 8d
RSP: 0018:ffffc9000c2bf528 EFLAGS: 00000207
RAX: 00000000000a2963 RBX: 0000000000000001 RCX: 1ffff92001857ebc
RDX: 00000000000a6000 RSI: 00000000000a6001 RDI: 0000000000000001
RBP: ffffc9000c2bf5e0 R08: ffffc9000c2bf5cc R09: ffffffff9101c3a4
R10: ffffc9000c2bf598 R11: 00000000000a2963 R12: ffffc9000c2bf5e8
R13: ffffc9000c2bf598 R14: ffffc9000c2bf5cd R15: ffffffff8b29638c
arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4119 [inline]
slab_alloc_node mm/slub.c:4168 [inline]
kmem_cache_alloc_noprof+0x226/0x3d0 mm/slub.c:4175
mt_alloc_one lib/maple_tree.c:176 [inline]
mas_alloc_nodes+0x18b/0x8b0 lib/maple_tree.c:1253
mas_node_count_gfp+0x105/0x130 lib/maple_tree.c:1335
mas_node_count lib/maple_tree.c:1349 [inline]
mas_wr_preallocate lib/maple_tree.c:4270 [inline]
mas_insert lib/maple_tree.c:4303 [inline]
mas_alloc_cyclic+0xacf/0x1680 lib/maple_tree.c:4365
mtree_alloc_cyclic+0x172/0x1e0 lib/maple_tree.c:6523
simple_offset_add+0xc4/0x160 fs/libfs.c:293
shmem_symlink+0x1d1/0x710 mm/shmem.c:3934
vfs_symlink fs/namei.c:4669 [inline]
vfs_symlink+0x3e8/0x660 fs/namei.c:4653
do_symlinkat+0x263/0x310 fs/namei.c:4695
__do_sys_symlinkat fs/namei.c:4711 [inline]
__se_sys_symlinkat fs/namei.c:4708 [inline]
__x64_sys_symlinkat+0x93/0xc0 fs/namei.c:4708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb35a1852a7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 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:00007fff2c82b0d8 EFLAGS: 00000206 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb35a1852a7
RDX: 00007fb35a203318 RSI: 00000000ffffff9c RDI: 00007fff2c82b160
RBP: 00007fff2c82b10c R08: 0000000000000017 R09: 00007fff2c82ae27
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000032
R13: 000000000003eddc R14: 00007fff2c82b160 R15: 00007fff2c82b160