last executing test programs:
kernel console output (not intermixed with test programs):
Warning: Permanently added '10.128.1.142' (ED25519) to the list of known hosts.
[ 86.890016][ T5813] cgroup: Unknown subsys name 'net'
[ 87.130786][ T5813] cgroup: Unknown subsys name 'cpuset'
[ 87.185131][ T10] cfg80211: failed to load regulatory.db
[ 87.187218][ T5813] cgroup: Unknown subsys name 'rlimit'
[ 87.223802][ T5815]
[ 87.223815][ T5815] ================================================
[ 87.223823][ T5815] WARNING: lock held when returning to user space!
[ 87.223833][ T5815] syzkaller #0 Not tainted
[ 87.223833][ T5815] syzkaller #0 Not tainted
[ 87.223844][ T5815] ------------------------------------------------
[ 87.223852][ T5815] udevd/5815 is leaving the kernel with locks still held!
[ 87.223865][ T5815] 1 lock held by udevd/5815:
[ 87.223877][ T5815] #0: ffffffff8dfc8140 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x200
[ 87.224007][ T5815] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:323
[ 87.224021][ T5815] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5815, name: udevd
[ 87.224038][ T5815] preempt_count: 0, expected: 0
[ 87.224048][ T5815] RCU nest depth: 1, expected: 0
[ 87.224058][ T5815] INFO: lockdep is turned off.
[ 87.224070][ T5815] CPU: 1 UID: 0 PID: 5815 Comm: udevd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
[ 87.224093][ T5815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
[ 87.224105][ T5815] Call Trace:
[ 87.224113][ T5815]
[ 87.224121][ T5815] dump_stack_lvl+0xe8/0x150
[ 87.224144][ T5815] __might_resched+0x329/0x480
[ 87.224167][ T5815] ? count_memcg_events+0x68/0x280
[ 87.224190][ T5815] kmem_cache_alloc_noprof+0x78/0x680
[ 87.224219][ T5815] ? do_getname+0x2e/0x250
[ 87.224239][ T5815] ? lock_vma_under_rcu+0x45a/0x500
[ 87.224270][ T5815] do_getname+0x2e/0x250
[ 87.224290][ T5815] ? getname_flags+0x11/0x20
[ 87.224311][ T5815] do_sys_openat2+0xca/0x200
[ 87.224336][ T5815] ? __pfx_do_sys_openat2+0x10/0x10
[ 87.224359][ T5815] ? lock_release+0x4b/0x3c0
[ 87.224389][ T5815] ? do_user_addr_fault+0xc6f/0x1340
[ 87.224413][ T5815] __x64_sys_openat+0x138/0x170
[ 87.224440][ T5815] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.224461][ T5815] do_syscall_64+0x15f/0xf80
[ 87.224485][ T5815] ? trace_irq_disable+0x3b/0x140
[ 87.224517][ T5815] ? clear_bhb_loop+0x40/0x90
[ 87.224540][ T5815] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.224560][ T5815] RIP: 0033:0x7f3e83cad407
[ 87.224578][ T5815] Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
[ 87.224595][ T5815] RSP: 002b:00007ffc50ea6100 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
[ 87.224615][ T5815] RAX: ffffffffffffffda RBX: 00007f3e83bbf880 RCX: 00007f3e83cad407
[ 87.224630][ T5815] RDX: 0000000000080000 RSI: 00007ffc50ea6270 RDI: ffffffffffffff9c
[ 87.224644][ T5815] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
[ 87.224656][ T5815] R10: 0000000000000000 R11: 0000000000000202 R12: 00005581680747f5
[ 87.224669][ T5815] R13: 00005581680747f5 R14: 0000000000000001 R15: 000055816808f140
[ 87.224691][ T5815]
[ 87.245815][ T5815] ------------[ cut here ]------------
[ 87.245830][ T5815] Voluntary context switch within RCU read-side critical section!
[ 87.245838][ T5815] WARNING: kernel/rcu/tree_plugin.h:332 at rcu_note_context_switch+0xcac/0xf40, CPU#1: udevd/5815
[ 87.245882][ T5815] Modules linked in:
[ 87.245903][ T5815] CPU: 1 UID: 0 PID: 5815 Comm: udevd Tainted: G W syzkaller #0 PREEMPT_{RT,(full)}
[ 87.245932][ T5815] Tainted: [W]=WARN
[ 87.245938][ T5815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
[ 87.245950][ T5815] RIP: 0010:rcu_note_context_switch+0xcac/0xf40
[ 87.245976][ T5815] Code: 00 41 c6 45 00 00 48 8b 3d 81 8d e2 0d 48 81 c4 b8 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 9b 60 ff ff 48 8d 3d 84 56 e6 0d <67> 48 0f b9 3a e9 1b f4 ff ff 90 0f 0b 90 45 84 e4 0f 84 ea f3 ff
[ 87.245993][ T5815] RSP: 0018:ffffc900042277b0 EFLAGS: 00010002
[ 87.246011][ T5815] RAX: 0000000000000000 RBX: ffff8880380c5c40 RCX: 0000000080000002
[ 87.246026][ T5815] RDX: 0000000000000000 RSI: ffffffff8ba845c0 RDI: ffffffff8f90b6b0
[ 87.246040][ T5815] RBP: dffffc0000000000 R08: ffffffff8f8d40f7 R09: 1ffffffff1f1a81e
[ 87.246055][ T5815] R10: dffffc0000000000 R11: fffffbfff1f1a81f R12: 0000000000000000
[ 87.246070][ T5815] R13: ffff8880380c5c40 R14: ffff8880b873c980 R15: ffff8880380c6104
[ 87.246086][ T5815] FS: 00007f3e83bbf880(0000) GS:ffff888125fb7000(0000) knlGS:0000000000000000
[ 87.246103][ T5815] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 87.246117][ T5815] CR2: 000055817049c0f0 CR3: 00000000316b0000 CR4: 00000000003526f0
[ 87.246137][ T5815] Call Trace:
[ 87.246145][ T5815]
[ 87.246154][ T5815] ? lock_release+0x4b/0x3c0
[ 87.246183][ T5815] ? do_raw_spin_lock+0x12b/0x2f0
[ 87.246205][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.246235][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.246266][ T5815] __schedule+0x297/0x54f0
[ 87.246288][ T5815] ? do_raw_spin_lock+0x12b/0x2f0
[ 87.246310][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.246342][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.246371][ T5815] ? trace_irq_enable+0x3b/0x140
[ 87.246409][ T5815] ? _raw_spin_unlock_irqrestore+0x4c/0x80
[ 87.246432][ T5815] ? rt_mutex_slowunlock+0x4a7/0x8b0
[ 87.246463][ T5815] ? trace_irq_enable+0x3b/0x140
[ 87.246484][ T5815] ? __pfx___schedule+0x10/0x10
[ 87.246503][ T5815] ? schedule+0x90/0x360
[ 87.246522][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.246551][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.246580][ T5815] ? lock_release+0x4b/0x3c0
[ 87.246605][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.246636][ T5815] schedule+0x164/0x360
[ 87.246656][ T5815] schedule_hrtimeout_range_clock+0x1f2/0x330
[ 87.246678][ T5815] ? _raw_spin_unlock_irqrestore+0x4c/0x80
[ 87.246702][ T5815] ? rt_mutex_slowunlock+0x4a7/0x8b0
[ 87.246733][ T5815] ? __pfx_schedule_hrtimeout_range_clock+0x10/0x10
[ 87.246756][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.246784][ T5815] ? __pfx_rt_mutex_slowunlock+0x10/0x10
[ 87.246814][ T5815] ? lock_release+0x4b/0x3c0
[ 87.246842][ T5815] ? rt_spin_unlock+0x160/0x200
[ 87.246873][ T5815] do_epoll_wait+0xa7a/0xbd0
[ 87.246909][ T5815] ? do_epoll_wait+0x6c5/0xbd0
[ 87.246943][ T5815] ? __pfx_do_epoll_wait+0x10/0x10
[ 87.246972][ T5815] ? __pfx_ep_autoremove_wake_function+0x10/0x10
[ 87.247011][ T5815] __x64_sys_epoll_wait+0x1d7/0x230
[ 87.247041][ T5815] ? __pfx___x64_sys_epoll_wait+0x10/0x10
[ 87.247072][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.247102][ T5815] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.247123][ T5815] do_syscall_64+0x15f/0xf80
[ 87.247145][ T5815] ? trace_irq_disable+0x3b/0x140
[ 87.247167][ T5815] ? clear_bhb_loop+0x40/0x90
[ 87.247191][ T5815] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.247211][ T5815] RIP: 0033:0x7f3e83cad407
[ 87.247229][ T5815] Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
[ 87.247246][ T5815] RSP: 002b:00007ffc50eaa6f0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
[ 87.247267][ T5815] RAX: ffffffffffffffda RBX: 00007f3e83bbf880 RCX: 00007f3e83cad407
[ 87.247281][ T5815] RDX: 0000000000000004 RSI: 00007ffc50eaa780 RDI: 0000000000000004
[ 87.247294][ T5815] RBP: 0000558170484910 R08: 0000000000000000 R09: 0000000000000000
[ 87.247307][ T5815] R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558170577bc0
[ 87.247321][ T5815] R13: 00007ffc50eaa780 R14: 0000000000000000 R15: 0000000000000004
[ 87.247342][ T5815]
[ 87.247353][ T5815] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 87.247370][ T5815] CPU: 1 UID: 0 PID: 5815 Comm: udevd Tainted: G W syzkaller #0 PREEMPT_{RT,(full)}
[ 87.247404][ T5815] Tainted: [W]=WARN
[ 87.247411][ T5815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
[ 87.247423][ T5815] Call Trace:
[ 87.247431][ T5815]
[ 87.247439][ T5815] vpanic+0x56c/0xa60
[ 87.247463][ T5815] ? __pfx__printk+0x10/0x10
[ 87.247490][ T5815] ? __pfx_vpanic+0x10/0x10
[ 87.247511][ T5815] ? is_bpf_text_address+0x292/0x2b0
[ 87.247539][ T5815] ? is_bpf_text_address+0x26/0x2b0
[ 87.247570][ T5815] panic+0xc5/0xd0
[ 87.247592][ T5815] ? __pfx_panic+0x10/0x10
[ 87.247622][ T5815] __warn+0x315/0x4c0
[ 87.247645][ T5815] ? rcu_note_context_switch+0xcac/0xf40
[ 87.247669][ T5815] ? rcu_note_context_switch+0xcac/0xf40
[ 87.247693][ T5815] __report_bug+0x29a/0x540
[ 87.247718][ T5815] ? rcu_note_context_switch+0xcac/0xf40
[ 87.247742][ T5815] ? __pfx___report_bug+0x10/0x10
[ 87.247767][ T5815] ? __page_table_check_zero+0x6a/0x3e0
[ 87.247799][ T5815] ? try_to_take_rt_mutex+0x840/0xb00
[ 87.247821][ T5815] report_bug_entry+0x19a/0x290
[ 87.247844][ T5815] ? rcu_note_context_switch+0xcac/0xf40
[ 87.247867][ T5815] ? rcu_note_context_switch+0xcb1/0xf40
[ 87.247890][ T5815] handle_bug+0xce/0x200
[ 87.247917][ T5815] exc_invalid_op+0x1a/0x50
[ 87.247944][ T5815] asm_exc_invalid_op+0x1a/0x20
[ 87.247964][ T5815] RIP: 0010:rcu_note_context_switch+0xcac/0xf40
[ 87.247989][ T5815] Code: 00 41 c6 45 00 00 48 8b 3d 81 8d e2 0d 48 81 c4 b8 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 9b 60 ff ff 48 8d 3d 84 56 e6 0d <67> 48 0f b9 3a e9 1b f4 ff ff 90 0f 0b 90 45 84 e4 0f 84 ea f3 ff
[ 87.248007][ T5815] RSP: 0018:ffffc900042277b0 EFLAGS: 00010002
[ 87.248024][ T5815] RAX: 0000000000000000 RBX: ffff8880380c5c40 RCX: 0000000080000002
[ 87.248038][ T5815] RDX: 0000000000000000 RSI: ffffffff8ba845c0 RDI: ffffffff8f90b6b0
[ 87.248053][ T5815] RBP: dffffc0000000000 R08: ffffffff8f8d40f7 R09: 1ffffffff1f1a81e
[ 87.248069][ T5815] R10: dffffc0000000000 R11: fffffbfff1f1a81f R12: 0000000000000000
[ 87.248083][ T5815] R13: ffff8880380c5c40 R14: ffff8880b873c980 R15: ffff8880380c6104
[ 87.248108][ T5815] ? lock_release+0x4b/0x3c0
[ 87.248136][ T5815] ? do_raw_spin_lock+0x12b/0x2f0
[ 87.248156][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.248186][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.248217][ T5815] __schedule+0x297/0x54f0
[ 87.248238][ T5815] ? do_raw_spin_lock+0x12b/0x2f0
[ 87.248260][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.248292][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.248322][ T5815] ? trace_irq_enable+0x3b/0x140
[ 87.248345][ T5815] ? _raw_spin_unlock_irqrestore+0x4c/0x80
[ 87.248369][ T5815] ? rt_mutex_slowunlock+0x4a7/0x8b0
[ 87.248407][ T5815] ? trace_irq_enable+0x3b/0x140
[ 87.248431][ T5815] ? __pfx___schedule+0x10/0x10
[ 87.248451][ T5815] ? schedule+0x90/0x360
[ 87.248469][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.248500][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.248530][ T5815] ? lock_release+0x4b/0x3c0
[ 87.248556][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.248587][ T5815] schedule+0x164/0x360
[ 87.248608][ T5815] schedule_hrtimeout_range_clock+0x1f2/0x330
[ 87.248631][ T5815] ? _raw_spin_unlock_irqrestore+0x4c/0x80
[ 87.248655][ T5815] ? rt_mutex_slowunlock+0x4a7/0x8b0
[ 87.248686][ T5815] ? __pfx_schedule_hrtimeout_range_clock+0x10/0x10
[ 87.248709][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.248738][ T5815] ? __pfx_rt_mutex_slowunlock+0x10/0x10
[ 87.248769][ T5815] ? lock_release+0x4b/0x3c0
[ 87.248798][ T5815] ? rt_spin_unlock+0x160/0x200
[ 87.248830][ T5815] do_epoll_wait+0xa7a/0xbd0
[ 87.248865][ T5815] ? do_epoll_wait+0x6c5/0xbd0
[ 87.248899][ T5815] ? __pfx_do_epoll_wait+0x10/0x10
[ 87.248929][ T5815] ? __pfx_ep_autoremove_wake_function+0x10/0x10
[ 87.248969][ T5815] __x64_sys_epoll_wait+0x1d7/0x230
[ 87.248999][ T5815] ? __pfx___x64_sys_epoll_wait+0x10/0x10
[ 87.249031][ T5815] ? rcu_is_watching+0x15/0xb0
[ 87.249061][ T5815] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.249083][ T5815] do_syscall_64+0x15f/0xf80
[ 87.249106][ T5815] ? trace_irq_disable+0x3b/0x140
[ 87.249129][ T5815] ? clear_bhb_loop+0x40/0x90
[ 87.249151][ T5815] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 87.249172][ T5815] RIP: 0033:0x7f3e83cad407
[ 87.249188][ T5815] Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
[ 87.249205][ T5815] RSP: 002b:00007ffc50eaa6f0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
[ 87.249225][ T5815] RAX: ffffffffffffffda RBX: 00007f3e83bbf880 RCX: 00007f3e83cad407
[ 87.249240][ T5815] RDX: 0000000000000004 RSI: 00007ffc50eaa780 RDI: 0000000000000004
[ 87.249253][ T5815] RBP: 0000558170484910 R08: 0000000000000000 R09: 0000000000000000
[ 87.249266][ T5815] R10: ffffffffffffffff R11: 0000000000000202 R12: 0000558170577bc0
[ 87.249281][ T5815] R13: 00007ffc50eaa780 R14: 0000000000000000 R15: 0000000000000004
[ 87.249301][ T5815]
[ 87.249891][ T5815] Kernel Offset: disabled