last executing test programs:
kernel console output (not intermixed with test programs):
[ 97.629161][ T1245] cfg80211: failed to load regulatory.db
Warning: Permanently added '10.128.1.101' (ED25519) to the list of known hosts.
[ 103.736630][ T5817] cgroup: Unknown subsys name 'net'
[ 103.969438][ T5817] cgroup: Unknown subsys name 'cpuset'
[ 104.032672][ T5817] cgroup: Unknown subsys name 'rlimit'
[ 104.035245][ T5820]
[ 104.035257][ T5820] ================================================
[ 104.035265][ T5820] WARNING: lock held when returning to user space!
[ 104.035288][ T5820] syzkaller #0 Not tainted
[ 104.035299][ T5820] ------------------------------------------------
[ 104.035306][ T5820] udevd/5820 is leaving the kernel with locks still held!
[ 104.035319][ T5820] 1 lock held by udevd/5820:
[ 104.035331][ T5820] #0: ffffffff8dfc8140 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x200
[ 104.035435][ T5820] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:323
[ 104.035450][ T5820] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5820, name: udevd
[ 104.035467][ T5820] preempt_count: 0, expected: 0
[ 104.035482][ T5820] RCU nest depth: 1, expected: 0
[ 104.035492][ T5820] INFO: lockdep is turned off.
[ 104.035519][ T5820] CPU: 0 UID: 0 PID: 5820 Comm: udevd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
[ 104.035544][ T5820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
[ 104.035566][ T5820] Call Trace:
[ 104.035579][ T5820]
[ 104.035588][ T5820] dump_stack_lvl+0xe8/0x150
[ 104.035614][ T5820] __might_resched+0x329/0x480
[ 104.035641][ T5820] prepare_alloc_pages+0x1f0/0x6b0
[ 104.035681][ T5820] __alloc_frozen_pages_noprof+0x12f/0x380
[ 104.035705][ T5820] ? __pfx___alloc_frozen_pages_noprof+0x10/0x10
[ 104.035730][ T5820] ? __pfx_policy_nodemask+0x10/0x10
[ 104.035764][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.035800][ T5820] alloc_pages_mpol+0xd1/0x380
[ 104.035838][ T5820] folio_alloc_mpol_noprof+0x3b/0x1e0
[ 104.035875][ T5820] vma_alloc_folio_noprof+0xe1/0x1e0
[ 104.035908][ T5820] ? __pfx_vma_alloc_folio_noprof+0x10/0x10
[ 104.035938][ T5820] ? lock_release+0x4b/0x3c0
[ 104.035965][ T5820] do_wp_page+0x1109/0x3d90
[ 104.035996][ T5820] ? preempt_count_add+0x91/0x190
[ 104.036015][ T5820] ? __pfx_do_wp_page+0x10/0x10
[ 104.036038][ T5820] ? rt_spin_lock+0x2ce/0x400
[ 104.036058][ T5820] ? __pfx_rt_spin_lock+0x10/0x10
[ 104.036075][ T5820] ? __pte_offset_map+0x45/0x200
[ 104.036101][ T5820] ? pte_offset_map_rw_nolock+0xea/0x160
[ 104.036127][ T5820] handle_mm_fault+0xaee/0x14c0
[ 104.036155][ T5820] ? handle_mm_fault+0xed/0x14c0
[ 104.036182][ T5820] ? __pfx_handle_mm_fault+0x10/0x10
[ 104.036207][ T5820] ? lock_vma_under_rcu+0x45a/0x500
[ 104.036244][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.036272][ T5820] do_user_addr_fault+0xa73/0x1340
[ 104.036296][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.036323][ T5820] ? trace_page_fault_user+0x84/0x1e0
[ 104.036343][ T5820] exc_page_fault+0x6a/0xc0
[ 104.036366][ T5820] asm_exc_page_fault+0x26/0x30
[ 104.036384][ T5820] RIP: 0033:0x7fa47a8a9c40
[ 104.036413][ T5820] Code: 64 24 08 75 ea 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e 41 5f c3 66 0f 1f 44 00 00 42 f6 44 10 08 01 0f 84 04 01 00 00 48 83 e6 fe <48> 89 70 08 49 8b 47 70 49 89 5f 70 66 48 0f 6e c0 48 89 58 18 0f
[ 104.036428][ T5820] RSP: 002b:00007ffdcd772cb0 EFLAGS: 00010206
[ 104.036444][ T5820] RAX: 000055a857dc6100 RBX: 000055a857dc60e0 RCX: 0000000000000001
[ 104.036457][ T5820] RDX: 000055a857dbde50 RSI: 0000000000000300 RDI: 000055a857dc5530
[ 104.036470][ T5820] RBP: 0000000000000020 R08: 0000000000000001 R09: 000055a857dc4170
[ 104.036481][ T5820] R10: 0000000000000300 R11: 0000000000000297 R12: 00007fa47a9e5ad0
[ 104.036493][ T5820] R13: 000055ad0d593cb6 R14: 000000055a857dc6 R15: 00007fa47a9e5ac0
[ 104.036514][ T5820]
[ 104.038667][ T5820] ------------[ cut here ]------------
[ 104.038677][ T5820] Voluntary context switch within RCU read-side critical section!
[ 104.038687][ T5820] WARNING: kernel/rcu/tree_plugin.h:332 at rcu_note_context_switch+0xcac/0xf40, CPU#0: udevd/5820
[ 104.038723][ T5820] Modules linked in:
[ 104.038739][ T5820] CPU: 0 UID: 0 PID: 5820 Comm: udevd Tainted: G W syzkaller #0 PREEMPT_{RT,(full)}
[ 104.038762][ T5820] Tainted: [W]=WARN
[ 104.038768][ T5820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
[ 104.038779][ T5820] RIP: 0010:rcu_note_context_switch+0xcac/0xf40
[ 104.038800][ T5820] Code: 00 41 c6 45 00 00 48 8b 3d 31 93 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 b4 5b e6 0d <67> 48 0f b9 3a e9 1b f4 ff ff 90 0f 0b 90 45 84 e4 0f 84 ea f3 ff
[ 104.038814][ T5820] RSP: 0018:ffffc9000453f7b0 EFLAGS: 00010002
[ 104.038827][ T5820] RAX: 0000000000000000 RBX: ffff888036c99ec0 RCX: 0000000080000002
[ 104.038839][ T5820] RDX: 0000000000000000 RSI: ffffffff8ba845c0 RDI: ffffffff8f90bbf0
[ 104.038851][ T5820] RBP: dffffc0000000000 R08: ffffffff8f8d45f7 R09: 1ffffffff1f1a8be
[ 104.038864][ T5820] R10: dffffc0000000000 R11: fffffbfff1f1a8bf R12: 0000000000000000
[ 104.038876][ T5820] R13: ffff888036c99ec0 R14: ffff8880b863c980 R15: ffff888036c9a384
[ 104.038889][ T5820] FS: 00007fa47a7ad880(0000) GS:ffff888125eb6000(0000) knlGS:0000000000000000
[ 104.038904][ T5820] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 104.038915][ T5820] CR2: 000055a857dc8da8 CR3: 000000002ac0a000 CR4: 00000000003526f0
[ 104.038930][ T5820] Call Trace:
[ 104.038936][ T5820]
[ 104.038942][ T5820] ? __pfx____migrate_enable+0x10/0x10
[ 104.038966][ T5820] ? __pfx_rt_mutex_slowunlock+0x10/0x10
[ 104.038984][ T5820] ? ep_poll_callback+0x735/0x800
[ 104.039012][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.039039][ T5820] __schedule+0x297/0x54f0
[ 104.039058][ T5820] ? do_raw_spin_lock+0x12b/0x2f0
[ 104.039076][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.039104][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.039129][ T5820] ? trace_irq_enable+0x3b/0x140
[ 104.039150][ T5820] ? _raw_spin_unlock_irqrestore+0x4c/0x80
[ 104.039172][ T5820] ? rt_mutex_slowunlock+0x4a7/0x8b0
[ 104.039191][ T5820] ? __pfx___schedule+0x10/0x10
[ 104.039208][ T5820] ? schedule+0x90/0x360
[ 104.039225][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.039251][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.039275][ T5820] ? lock_release+0x4b/0x3c0
[ 104.039297][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.039323][ T5820] schedule+0x164/0x360
[ 104.039343][ T5820] schedule_hrtimeout_range_clock+0x1f2/0x330
[ 104.039363][ T5820] ? _raw_spin_unlock_irqrestore+0x4c/0x80
[ 104.039389][ T5820] ? rt_mutex_slowunlock+0x4a7/0x8b0
[ 104.039412][ T5820] ? __pfx_schedule_hrtimeout_range_clock+0x10/0x10
[ 104.039434][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.039458][ T5820] ? __pfx_rt_mutex_slowunlock+0x10/0x10
[ 104.039474][ T5820] ? lock_release+0x4b/0x3c0
[ 104.039498][ T5820] ? rt_spin_unlock+0x160/0x200
[ 104.039514][ T5820] do_epoll_wait+0xa7a/0xbd0
[ 104.039544][ T5820] ? do_epoll_wait+0x6c5/0xbd0
[ 104.039573][ T5820] ? __pfx_do_epoll_wait+0x10/0x10
[ 104.039599][ T5820] ? __pfx_ep_autoremove_wake_function+0x10/0x10
[ 104.039632][ T5820] __x64_sys_epoll_wait+0x1d7/0x230
[ 104.039658][ T5820] ? __pfx___x64_sys_epoll_wait+0x10/0x10
[ 104.039685][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.039710][ T5820] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 104.039728][ T5820] do_syscall_64+0x15f/0xf80
[ 104.039749][ T5820] ? trace_irq_disable+0x3b/0x140
[ 104.039768][ T5820] ? clear_bhb_loop+0x40/0x90
[ 104.039787][ T5820] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 104.039803][ T5820] RIP: 0033:0x7fa47a89b407
[ 104.039817][ T5820] 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
[ 104.039831][ T5820] RSP: 002b:00007ffdcd77b8d0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
[ 104.039847][ T5820] RAX: ffffffffffffffda RBX: 00007fa47a7ad880 RCX: 00007fa47a89b407
[ 104.039859][ T5820] RDX: 0000000000000004 RSI: 00007ffdcd77b960 RDI: 0000000000000004
[ 104.039869][ T5820] RBP: 000055a857dae910 R08: 0000000000000000 R09: 0000000000000000
[ 104.039880][ T5820] R10: ffffffffffffffff R11: 0000000000000202 R12: 000055a857de5c80
[ 104.039891][ T5820] R13: 00007ffdcd77b960 R14: 0000000000000000 R15: 0000000000000004
[ 104.039909][ T5820]
[ 104.039918][ T5820] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 104.039932][ T5820] CPU: 0 UID: 0 PID: 5820 Comm: udevd Tainted: G W syzkaller #0 PREEMPT_{RT,(full)}
[ 104.039954][ T5820] Tainted: [W]=WARN
[ 104.039960][ T5820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
[ 104.039970][ T5820] Call Trace:
[ 104.039975][ T5820]
[ 104.039981][ T5820] vpanic+0x56c/0xa60
[ 104.040002][ T5820] ? __pfx__printk+0x10/0x10
[ 104.040025][ T5820] ? __pfx_vpanic+0x10/0x10
[ 104.040042][ T5820] ? is_bpf_text_address+0x292/0x2b0
[ 104.040066][ T5820] ? is_bpf_text_address+0x26/0x2b0
[ 104.040092][ T5820] panic+0xc5/0xd0
[ 104.040110][ T5820] ? __pfx_panic+0x10/0x10
[ 104.040136][ T5820] __warn+0x315/0x4c0
[ 104.040154][ T5820] ? rcu_note_context_switch+0xcac/0xf40
[ 104.040175][ T5820] ? rcu_note_context_switch+0xcac/0xf40
[ 104.040195][ T5820] __report_bug+0x29a/0x540
[ 104.040216][ T5820] ? _raw_spin_unlock_irqrestore+0x4c/0x80
[ 104.040240][ T5820] ? rcu_note_context_switch+0xcac/0xf40
[ 104.040259][ T5820] ? __pfx___report_bug+0x10/0x10
[ 104.040287][ T5820] report_bug_entry+0x19a/0x290
[ 104.040307][ T5820] ? rcu_note_context_switch+0xcac/0xf40
[ 104.040326][ T5820] ? rcu_note_context_switch+0xcb1/0xf40
[ 104.040346][ T5820] handle_bug+0xce/0x200
[ 104.040370][ T5820] exc_invalid_op+0x1a/0x50
[ 104.040394][ T5820] asm_exc_invalid_op+0x1a/0x20
[ 104.040419][ T5820] RIP: 0010:rcu_note_context_switch+0xcac/0xf40
[ 104.040440][ T5820] Code: 00 41 c6 45 00 00 48 8b 3d 31 93 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 b4 5b e6 0d <67> 48 0f b9 3a e9 1b f4 ff ff 90 0f 0b 90 45 84 e4 0f 84 ea f3 ff
[ 104.040454][ T5820] RSP: 0018:ffffc9000453f7b0 EFLAGS: 00010002
[ 104.040467][ T5820] RAX: 0000000000000000 RBX: ffff888036c99ec0 RCX: 0000000080000002
[ 104.040479][ T5820] RDX: 0000000000000000 RSI: ffffffff8ba845c0 RDI: ffffffff8f90bbf0
[ 104.040491][ T5820] RBP: dffffc0000000000 R08: ffffffff8f8d45f7 R09: 1ffffffff1f1a8be
[ 104.040504][ T5820] R10: dffffc0000000000 R11: fffffbfff1f1a8bf R12: 0000000000000000
[ 104.040532][ T5820] R13: ffff888036c99ec0 R14: ffff8880b863c980 R15: ffff888036c9a384
[ 104.040553][ T5820] ? __pfx____migrate_enable+0x10/0x10
[ 104.040576][ T5820] ? __pfx_rt_mutex_slowunlock+0x10/0x10
[ 104.040595][ T5820] ? ep_poll_callback+0x735/0x800
[ 104.040622][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.040650][ T5820] __schedule+0x297/0x54f0
[ 104.040670][ T5820] ? do_raw_spin_lock+0x12b/0x2f0
[ 104.040688][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.040742][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.040768][ T5820] ? trace_irq_enable+0x3b/0x140
[ 104.040788][ T5820] ? _raw_spin_unlock_irqrestore+0x4c/0x80
[ 104.040811][ T5820] ? rt_mutex_slowunlock+0x4a7/0x8b0
[ 104.040831][ T5820] ? __pfx___schedule+0x10/0x10
[ 104.040849][ T5820] ? schedule+0x90/0x360
[ 104.040867][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.040894][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.040920][ T5820] ? lock_release+0x4b/0x3c0
[ 104.040942][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.040970][ T5820] schedule+0x164/0x360
[ 104.040990][ T5820] schedule_hrtimeout_range_clock+0x1f2/0x330
[ 104.041011][ T5820] ? _raw_spin_unlock_irqrestore+0x4c/0x80
[ 104.041034][ T5820] ? rt_mutex_slowunlock+0x4a7/0x8b0
[ 104.041051][ T5820] ? __pfx_schedule_hrtimeout_range_clock+0x10/0x10
[ 104.041074][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.041099][ T5820] ? __pfx_rt_mutex_slowunlock+0x10/0x10
[ 104.041116][ T5820] ? lock_release+0x4b/0x3c0
[ 104.041141][ T5820] ? rt_spin_unlock+0x160/0x200
[ 104.041159][ T5820] do_epoll_wait+0xa7a/0xbd0
[ 104.041189][ T5820] ? do_epoll_wait+0x6c5/0xbd0
[ 104.041220][ T5820] ? __pfx_do_epoll_wait+0x10/0x10
[ 104.041247][ T5820] ? __pfx_ep_autoremove_wake_function+0x10/0x10
[ 104.041282][ T5820] __x64_sys_epoll_wait+0x1d7/0x230
[ 104.041309][ T5820] ? __pfx___x64_sys_epoll_wait+0x10/0x10
[ 104.041337][ T5820] ? rcu_is_watching+0x15/0xb0
[ 104.041364][ T5820] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 104.041382][ T5820] do_syscall_64+0x15f/0xf80
[ 104.041409][ T5820] ? trace_irq_disable+0x3b/0x140
[ 104.041429][ T5820] ? clear_bhb_loop+0x40/0x90
[ 104.041449][ T5820] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 104.041466][ T5820] RIP: 0033:0x7fa47a89b407
[ 104.041480][ T5820] 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
[ 104.041494][ T5820] RSP: 002b:00007ffdcd77b8d0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e8
[ 104.041511][ T5820] RAX: ffffffffffffffda RBX: 00007fa47a7ad880 RCX: 00007fa47a89b407
[ 104.041524][ T5820] RDX: 0000000000000004 RSI: 00007ffdcd77b960 RDI: 0000000000000004
[ 104.041535][ T5820] RBP: 000055a857dae910 R08: 0000000000000000 R09: 0000000000000000
[ 104.041546][ T5820] R10: ffffffffffffffff R11: 0000000000000202 R12: 000055a857de5c80
[ 104.041558][ T5820] R13: 00007ffdcd77b960 R14: 0000000000000000 R15: 0000000000000004
[ 104.041577][ T5820]
[ 104.041841][ T5820] Kernel Offset: disabled