rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-...D } 2684 jiffies s: 265257 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 31442 Comm: syz-executor Not tainted 6.10.0-rc6-syzkaller-00163-g661e504db04c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x11/0x70 kernel/kcov.c:207
Code: 5b e9 23 40 5a 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 c0 d4 03 00 <65> 8b 15 00 ad 6d 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74
RSP: 0018:ffffc90000a18cb8 EFLAGS: 00000046
RAX: ffffffff8b7eff91 RBX: 1ffff110172a593a RCX: ffff88801f105a00
RDX: 0000000000010002 RSI: ffff888063643340 RDI: ffff888063643340
RBP: 1ffff1100c6c8668 R08: ffffffff8b7efdeb R09: 1ffffffff1f5a945
R10: dffffc0000000000 R11: fffffbfff1f5a946 R12: ffff8880b952c9d0
R13: ffff8880b952c9d0 R14: 0000000000000000 R15: ffff888063643340
FS:  0000000000000000(0000) GS:ffff8880b9500000(0063) knlGS:00000000577be440
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f726a9a0 CR3: 000000005d594000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rb_add_cached include/linux/rbtree.h:182 [inline]
 timerqueue_add+0x1f1/0x290 lib/timerqueue.c:40
 enqueue_hrtimer+0x1b2/0x3c0 kernel/time/hrtimer.c:1093
 __run_hrtimer kernel/time/hrtimer.c:1706 [inline]
 __hrtimer_run_queues+0x6cb/0xd50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp8+0x18/0x90 kernel/kcov.c:284
Code: 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 4c 8b 04 24 65 48 8b 0c 25 c0 d4 03 00 65 8b 05 a0 aa 6d 7e <a9> 00 01 ff 00 74 10 a9 00 01 00 00 74 57 83 b9 1c 16 00 00 00 74
RSP: 0018:ffffc9000924f3c0 EFLAGS: 00000283
RAX: 0000000080000001 RBX: ffffffff81000000 RCX: ffff88801f105a00
RDX: ffffc9000924f4d5 RSI: ffffffff81000000 RDI: ffffffff81fba25e
RBP: ffffffff81fba25e R08: ffffffff8140f1c9 R09: ffffc9000924f590
R10: 0000000000000003 R11: ffffffff8181dd90 R12: ffffc9000924f4a0
R13: ffffc9000924f4f0 R14: dffffc0000000000 R15: ffffffff81fba25f
 orc_find arch/x86/kernel/unwind_orc.c:206 [inline]
 unwind_next_frame+0x1d9/0x2a00 arch/x86/kernel/unwind_orc.c:494
 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
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4002 [inline]
 kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4009
 alloc_empty_file+0x9e/0x1d0 fs/file_table.c:202
 path_openat+0x105/0x35f0 fs/namei.c:3799
 do_filp_open+0x235/0x490 fs/namei.c:3840
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1413
 do_sys_open fs/open.c:1428 [inline]
 __do_compat_sys_openat fs/open.c:1488 [inline]
 __se_compat_sys_openat fs/open.c:1486 [inline]
 __ia32_compat_sys_openat+0x23f/0x290 fs/open.c:1486
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb4/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x34/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf73d6579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f7528b20 EFLAGS: 00000206 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000f72c184b
RDX: 0000000000080001 RSI: 0000000000000000 RDI: 00000000f73c1ff4
RBP: 0000000000080001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>