rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=1744/1/0x4000000000000000 softirq=66380/66380 fqs=96
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15907/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=68985, q=1417 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 15915 Comm: syz.3.4025 Not tainted 6.11.0-syzkaller-07341-gbaeb9a7d8b60 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:advance_sched+0xb3c/0xca0 net/sched/sch_taprio.c:989
Code: be 6f 03 00 00 48 c7 c2 40 a2 11 8d e8 cd 68 ab f7 48 c7 c7 e0 89 93 8e 48 89 de e8 8e 2d ab f7 e8 d9 65 b6 f7 b8 01 00 00 00 <48> 81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 c9 1d 2b 02
RSP: 0018:ffffc90000a18c90 EFLAGS: 00000083
RAX: 0000000000000001 RBX: ffffffff89c521f2 RCX: ffffc90000a18b03
RDX: 0000000000000001 RSI: ffffffff8c0ae940 RDI: ffffffff8c60dd00
RBP: 0000000000000001 R08: ffffffff901c5aaf R09: 1ffffffff2038b55
R10: dffffc0000000000 R11: fffffbfff2038b56 R12: dffffc0000000000
R13: 17fc30d270000000 R14: ffff888060bdb000 R15: ffff88805e659360
FS:  00007f7d382016c0(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d38200f98 CR3: 000000006f30a000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1691 [inline]
 __hrtimer_run_queues+0x59d/0xd50 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x3f0 arch/x86/kernel/apic/apic.c:1043
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1037
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 3e ff 32 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 53 cf 99 f5 65 8b 05 64 8d 3a 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc9000bb778c0 EFLAGS: 00000206
RAX: 219154ffeb563900 RBX: 1ffff9200176ef1c RCX: ffffffff9a3a6903
RDX: dffffc0000000000 RSI: ffffffff8c0ad7c0 RDI: 0000000000000001
RBP: ffffc9000bb77958 R08: ffffffff901c5aaf R09: 1ffffffff2038b55
R10: dffffc0000000000 R11: fffffbfff2038b56 R12: dffffc0000000000
R13: 1ffff9200176ef18 R14: ffffc9000bb778e0 R15: 0000000000000246
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 timerfd_clock_was_set+0x1e0/0x2f0 fs/timerfd.c:113
 clock_was_set+0x78e/0x810 kernel/time/hrtimer.c:978
 timekeeping_inject_offset+0x4e8/0x580 kernel/time/timekeeping.c:1524
 do_adjtimex+0x51d/0xae0 kernel/time/timekeeping.c:2575
 do_clock_adjtime kernel/time/posix-timers.c:1174 [inline]
 __do_sys_clock_adjtime kernel/time/posix-timers.c:1186 [inline]
 __se_sys_clock_adjtime kernel/time/posix-timers.c:1177 [inline]
 __x64_sys_clock_adjtime+0x1e3/0x290 kernel/time/posix-timers.c:1177
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7d3737def9
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:00007f7d38201038 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f7d37536058 RCX: 00007f7d3737def9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f7d373f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7d37536058 R15: 00007ffd14350268
 </TASK>
task:syz.4.4024      state:R  running task     stack:24672 pid:15907 tgid:15907 ppid:9899   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5264 [inline]
 __schedule+0x1893/0x4b50 kernel/sched/core.c:6607
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6786
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6810
 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:1688 [inline]
 zap_pmd_range mm/memory.c:1736 [inline]
 zap_pud_range mm/memory.c:1765 [inline]
 zap_p4d_range mm/memory.c:1786 [inline]
 unmap_page_range+0x3818/0x42c0 mm/memory.c:1807
 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1897
 exit_mmap+0x264/0xc80 mm/mmap.c:3412
 __mmput+0x115/0x390 kernel/fork.c:1345
 exit_mm+0x220/0x310 kernel/exit.c:571
 do_exit+0x9b2/0x27f0 kernel/exit.c:869
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 __do_sys_exit_group kernel/exit.c:1042 [inline]
 __se_sys_exit_group kernel/exit.c:1040 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040
 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75af97def9
RSP: 002b:00007ffc38adff58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f75af97def9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc38adffac R08: 00007ffc38ae003f R09: 000000000009e1d7
R10: 00007f75afb22000 R11: 0000000000000246 R12: 0000000000000032
R13: 000000000009e1d7 R14: 000000000009e17c R15: 00007ffc38ae0000
 </TASK>
rcu: rcu_preempt kthread starved for 10310 jiffies! g68985 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:25952 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5264 [inline]
 __schedule+0x1893/0x4b50 kernel/sched/core.c:6607
 __schedule_loop kernel/sched/core.c:6684 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6699
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 15924 Comm: syz.0.4029 Not tainted 6.11.0-syzkaller-07341-gbaeb9a7d8b60 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x19f8/0x2ca0 kernel/smp.c:884
Code: 89 e6 83 e6 01 31 ff e8 86 f1 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 31 ed 0b 00 eb 38 f3 90 42 0f b6 04 23 <84> c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 15 ed 0b 00 eb e4 44
RSP: 0018:ffffc9000b9c7720 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff110171288f9 RCX: 0000000000040000
RDX: ffffc90019c09000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000b9c7908 R08: ffffffff8188d1da R09: 1ffffffff2849f03
R10: dffffc0000000000 R11: fffffbfff2849f04 R12: dffffc0000000000
R13: ffff8880b89447c8 R14: ffff8880b883fb80 R15: 0000000000000001
FS:  00007f894358d6c0(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8942760700 CR3: 00000000393dc000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051
 kill_bdev block/bdev.c:90 [inline]
 set_blocksize+0x2e2/0x360 block/bdev.c:173
 sb_set_blocksize+0x47/0xf0 block/bdev.c:182
 ext4_load_super fs/ext4/super.c:5060 [inline]
 __ext4_fill_super fs/ext4/super.c:5188 [inline]
 ext4_fill_super+0x12f0/0x6df0 fs/ext4/super.c:5664
 get_tree_bdev+0x3f9/0x570 fs/super.c:1635
 vfs_get_tree+0x92/0x2b0 fs/super.c:1800
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f894277f69a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 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:00007f894358ce68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f894358cef0 RCX: 00007f894277f69a
RDX: 0000000020000500 RSI: 0000000020000000 RDI: 00007f894358ceb0
RBP: 0000000020000500 R08: 00007f894358cef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000
R13: 00007f894358ceb0 R14: 0000000000000783 R15: 0000000020000240
 </TASK>