rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (73 ticks this GP) idle=58d/1/0x4000000000000002 softirq=8639/8639 fqs=2122 (detected by 1, t=10504 jiffies, g=10109, q=129206) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3546 Comm: udevd Not tainted 5.15.173-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:35 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:132 [inline] RIP: 0010:rcu_read_unlock_special+0x3ff/0x520 kernel/rcu/tree_plugin.h:667 Code: 48 c1 eb 03 80 3c 13 00 74 12 4c 89 f7 e8 e9 6b 5e 00 48 ba 00 00 00 00 00 fc ff df 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 <80> 3c 13 00 74 12 4c 89 f7 e8 43 6b 5e 00 48 ba 00 00 00 00 00 fc RSP: 0000:ffffc90000006a00 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 1ffff92000000d48 RCX: ffffffff816bdf37 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff88807d843b80 RBP: ffffc90000006ad8 R08: dffffc0000000000 R09: ffffed100fb08771 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8cb23c00 R13: ffff8880b8e3b1c8 R14: ffffc90000006a40 R15: 1ffff92000000d44 FS: 00007f67b55a0c80(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa2cd76b000 CR3: 000000001f9e9000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __rcu_read_unlock+0x92/0x100 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:771 [inline] __perf_event_output kernel/events/core.c:7788 [inline] perf_event_output_forward+0x292/0x310 kernel/events/core.c:7797 __perf_event_overflow+0x35d/0x530 kernel/events/core.c:9490 perf_swevent_overflow kernel/events/core.c:9566 [inline] perf_swevent_event+0x4c5/0x550 kernel/events/core.c:9604 perf_tp_event+0x363/0xc40 kernel/events/core.c:10022 perf_trace_run_bpf_submit+0xf7/0x1d0 kernel/events/core.c:9996 perf_trace_preemptirq_template+0x31d/0x430 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0x10e/0x190 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713 RIP: 0010:rcu_read_unlock_special+0x84/0x520 kernel/rcu/tree_plugin.h:671 Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 bd 92 96 7e 41 f7 c4 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a RSP: 0000:ffffc900000071e0 EFLAGS: 00000206 RAX: a29d7427f3f2c500 RBX: 1ffff92000000e44 RCX: ffffffff81632d68 RDX: dffffc0000000000 RSI: ffffffff8aab2a80 RDI: ffffffff8af9ed00 RBP: ffffc900000072b8 R08: dffffc0000000000 R09: fffffbfff2131043 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8cb23c00 R13: ffff88807d843fd8 R14: ffffc90000007220 R15: 1ffff92000000e40 __rcu_read_unlock+0x92/0x100 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:771 [inline] is_bpf_text_address+0x24a/0x260 kernel/bpf/core.c:723 kernel_text_address kernel/extable.c:151 [inline] __kernel_text_address+0x94/0x100 kernel/extable.c:105 unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323 arch_stack_walk+0xf3/0x140 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233 dst_alloc+0x12c/0x190 net/core/dst.c:88 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x76/0x4f0 net/ipv6/route.c:3263 ndisc_send_skb+0x305/0x13c0 net/ipv6/ndisc.c:491 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3959 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451 expire_timers kernel/time/timer.c:1496 [inline] __run_timers+0x67c/0x890 kernel/time/timer.c:1767 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558 __do_softirq kernel/softirq.c:592 [inline] invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:641 irq_exit_rcu+0x5/0x20 kernel/softirq.c:653 instr_sysvec_call_function_single arch/x86/kernel/smp.c:243 [inline] sysvec_call_function_single+0x9d/0xc0 arch/x86/kernel/smp.c:243 asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:684 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194 Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 b2 0e 82 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 57 3f 0f f7 65 8b 05 78 32 ba 75 85 c0 74 3f 48 c7 04 24 0e 36 RSP: 0000:ffffc90002ddf780 EFLAGS: 00000206 RAX: a29d7427f3f2c500 RBX: 1ffff920005bbef4 RCX: ffffffff96a8ef03 RDX: dffffc0000000000 RSI: ffffffff8aab2a80 RDI: 0000000000000001 RBP: ffffc90002ddf818 R08: ffffffff8186f3c8 R09: ffffed10171c765a R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff920005bbef0 R14: ffffc90002ddf7a0 R15: 0000000000000246 spin_unlock_irqrestore include/linux/spinlock.h:418 [inline] __slab_free+0x1ac/0x250 mm/slub.c:3402 do_slab_free mm/slub.c:3487 [inline] ___cache_free+0xe3/0x100 mm/slub.c:3506 qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233 getname_flags+0xb8/0x4e0 fs/namei.c:138 user_path_at_empty+0x2a/0x180 fs/namei.c:2882 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x106/0x3b0 fs/stat.c:221 vfs_fstatat fs/stat.c:243 [inline] __do_sys_newfstatat fs/stat.c:411 [inline] __se_sys_newfstatat fs/stat.c:405 [inline] __x64_sys_newfstatat+0x12c/0x1b0 fs/stat.c:405 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f67b56cb5f4 Code: 64 c7 00 09 00 00 00 83 c8 ff c3 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 00 00 00 00 41 89 ca b8 06 01 00 00 0f 05 <45> 31 c0 3d 00 f0 ff ff 76 10 48 8b 15 03 a8 0d 00 f7 d8 41 83 c8 RSP: 002b:00007ffc172a9838 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 0000564184ad91af RCX: 00007f67b56cb5f4 RDX: 00007ffc172a9848 RSI: 00007ffc172a9cd8 RDI: 00000000ffffff9c RBP: 00007ffc172a98d8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc172a9cd8 R13: 00007ffc172a9848 R14: 00005641ad8a6910 R15: 0000000000000000