rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=23e4/1/0x4000000000000000 softirq=13398/13398 fqs=0
rcu: (detected by 0, t=10502 jiffies, g=17485, q=207 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6313 Comm: syz-executor.4 Not tainted 6.9.0-rc5-syzkaller-00355-g2c8159388952 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5492 [inline]
RIP: 0010:lock_is_held_type+0xad/0x190 kernel/locking/lockdep.c:5825
Code: 83 bd d0 0a 00 00 00 7e 47 4c 89 eb 48 81 c3 d8 0a 00 00 31 ed 48 83 fd 31 73 24 48 89 df 4c 89 fe e8 67 02 00 00 85 c0 75 2a <48> ff c5 49 63 85 d0 0a 00 00 48 83 c3 28 48 39 c5 7c d8 eb 11 48
RSP: 0018:ffffc90000a08c48 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88805f672900 RCX: ffff88805f671e00
RDX: ffff88805f671e00 RSI: ffff88805d929300 RDI: ffff88805f672900
RBP: 0000000000000001 R08: ffffffff8981871b R09: fffff52000141180
R10: dffffc0000000000 R11: fffff52000141180 R12: 0000000000000046
R13: ffff88805f671e00 R14: 00000000ffffffff R15: ffff88805d929300
FS: 000055555e253480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f89481025e4 CR3: 0000000024b16000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_is_held include/linux/lockdep.h:231 [inline]
advance_sched+0xcd/0xca0 net/sched/sch_taprio.c:925
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x5a5/0xd50 kernel/time/hrtimer.c:1756
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x5d/0x70 kernel/kcov.c:225
Code: f0 15 00 00 83 fa 02 75 21 48 8b 91 f8 15 00 00 48 8b 32 48 8d 7e 01 8b 89 f4 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90
RSP: 0018:ffffc9001495f420 EFLAGS: 00000293
RAX: ffffffff8141465f RBX: 0000000000000002 RCX: ffff88805f671e00
RDX: 0000000000000000 RSI: ffffffff8e1a2f00 RDI: 0000000000000002
RBP: ffffffff902dacf6 R08: 0000000000000003 R09: ffffffff81414632
R10: 0000000000000002 R11: ffff88805f671e00 R12: ffffffff8fbac41c
R13: dffffc0000000000 R14: 1ffff9200292bea0 R15: ffffffff902dacf2
unwind_next_frame+0x6ef/0x2a00 arch/x86/kernel/unwind_orc.c:505
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slub.c:3966 [inline]
__kmalloc+0x233/0x4a0 mm/slub.c:3979
kmalloc_array include/linux/slab.h:665 [inline]
kcalloc include/linux/slab.h:696 [inline]
security_inode_init_security+0x126/0x440 security/security.c:1720
__ext4_new_inode+0x34b4/0x4390 fs/ext4/ialloc.c:1326
ext4_symlink+0x38d/0xb50 fs/ext4/namei.c:3395
vfs_symlink+0x137/0x2a0 fs/namei.c:4481
do_symlinkat+0x222/0x3a0 fs/namei.c:4507
__do_sys_symlinkat fs/namei.c:4523 [inline]
__se_sys_symlinkat fs/namei.c:4520 [inline]
__x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4520
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f894807d627
Code: 73 01 c3 48 c7 c1 b0 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcab342ed8 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007ffcab342fa0 RCX: 00007f894807d627
RDX: 00007f89480ca545 RSI: 00000000ffffff9c RDI: 00007f89480c950e
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g17485 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=7600
rcu: rcu_preempt kthread starved for 10502 jiffies! g17485 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:24496 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244