last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.0.146' (ED25519) to the list of known hosts. [ 20.773439][ T4610] cgroup: Unknown subsys name 'net' [ 20.883657][ T4610] cgroup: Unknown subsys name 'cpuset' [ 20.886318][ T4610] cgroup: Unknown subsys name 'rlimit' [ 20.887898][ T4651] [ 20.888260][ T4651] ================================================ [ 20.889309][ T4651] WARNING: lock held when returning to user space! [ 20.890331][ T4651] syzkaller #0 Not tainted [ 20.891060][ T4651] ------------------------------------------------ [ 20.892181][ T4651] dhcpcd-run-hook/4651 is leaving the kernel with locks still held! [ 20.893646][ T4651] 1 lock held by dhcpcd-run-hook/4651: [ 20.894606][ T4651] #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x10/0x4c [ 20.896305][ T4651] ------------[ cut here ]------------ [ 20.896311][ T4651] Voluntary context switch within RCU read-side critical section! [ 20.896343][ T4651] WARNING: kernel/rcu/tree_plugin.h:332 at rcu_note_context_switch+0xba8/0xeb8, CPU#0: dhcpcd-run-hook/4651 [ 20.900494][ T4651] Modules linked in: [ 20.901052][ T4651] CPU: 0 UID: 0 PID: 4651 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT [ 20.902580][ T4651] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 20.904344][ T4651] pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 20.905699][ T4651] pc : rcu_note_context_switch+0xba8/0xeb8 [ 20.906702][ T4651] lr : rcu_note_context_switch+0xba8/0xeb8 [ 20.907668][ T4651] sp : ffff8000959f7b20 [ 20.908364][ T4651] x29: ffff8000959f7ba0 x28: dfff800000000000 x27: dfff800000000000 [ 20.909695][ T4651] x26: 0000000000000000 x25: 1ffff0001111bd74 x24: 0000000000000000 [ 20.911017][ T4651] x23: ffff700012b3ef98 x22: ffff800125887000 x21: ffff0001ae11c3c0 [ 20.912385][ T4651] x20: ffff0000dddc2184 x19: ffff0000dddc1d00 x18: 0000000000000000 [ 20.913808][ T4651] x17: ffff800125887000 x16: ffff80008e8d0000 x15: 0000000000000000 [ 20.915134][ T4651] x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 [ 20.916457][ T4651] x11: 00000000000004f7 x10: 0000000000ff0100 x9 : a9d4b3ead1abcb00 [ 20.917816][ T4651] x8 : a9d4b3ead1abcb00 x7 : 7865746e6f632079 x6 : ffff8000804886d0 [ 20.919146][ T4651] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f13b0 [ 20.920491][ T4651] x2 : 0000000000000001 x1 : ffff0000dddc1d00 x0 : 0000000000000000 [ 20.921818][ T4651] Call trace: [ 20.922335][ T4651] rcu_note_context_switch+0xba8/0xeb8 (P) [ 20.923221][ T4651] __schedule+0x314/0x2d24 [ 20.923956][ T4651] schedule+0xa4/0x140 [ 20.924635][ T4651] exit_to_user_mode_loop+0x60/0x17c [ 20.925555][ T4651] el0_interrupt+0x190/0x2ac [ 20.926295][ T4651] __el0_irq_handler_common+0x18/0x24 [ 20.927144][ T4651] el0t_64_irq_handler+0x10/0x1c [ 20.928008][ T4651] el0t_64_irq+0x198/0x19c [ 20.928788][ T4651] irq event stamp: 144 [ 20.929494][ T4651] hardirqs last enabled at (143): [] memcg1_commit_charge+0xc0/0x12c [ 20.931182][ T4651] hardirqs last disabled at (144): [] el0_da+0x78/0x23c [ 20.932637][ T4651] softirqs last enabled at (24): [] local_bh_enable+0x10/0x34 [ 20.934105][ T4651] softirqs last disabled at (22): [] local_bh_disable+0x10/0x34 [ 20.935739][ T4651] ---[ end trace 0000000000000000 ]--- [ 20.936833][ T4651] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:323 [ 20.936852][ T4651] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 4651, name: dhcpcd-run-hook [ 20.936861][ T4651] preempt_count: 0, expected: 0 [ 20.936865][ T4651] RCU nest depth: 1, expected: 0 [ 20.936870][ T4651] INFO: lockdep is turned off. [ 20.936875][ T4651] CPU: 0 UID: 0 PID: 4651 Comm: dhcpcd-run-hook Tainted: G W syzkaller #0 PREEMPT [ 20.936885][ T4651] Tainted: [W]=WARN [ 20.936887][ T4651] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 20.936891][ T4651] Call trace: [ 20.936893][ T4651] show_stack+0x2c/0x3c (C) [ 20.936905][ T4651] __dump_stack+0x30/0x40 [ 20.936917][ T4651] dump_stack_lvl+0xd8/0x12c [ 20.936925][ T4651] dump_stack+0x1c/0x28 [ 20.936933][ T4651] __might_resched+0x350/0x4ac [ 20.936945][ T4651] __might_sleep+0x84/0xdc [ 20.936953][ T4651] prepare_alloc_pages+0x178/0x4b0 [ 20.936965][ T4651] __alloc_frozen_pages_noprof+0x134/0x31c [ 20.936975][ T4651] alloc_pages_mpol+0x1ec/0x464 [ 20.936982][ T4651] folio_alloc_mpol_noprof+0x4c/0x248 [ 20.936988][ T4651] vma_alloc_folio_noprof+0xfc/0x1d8 [ 20.936995][ T4651] folio_prealloc+0x5c/0x1b0 [ 20.937004][ T4651] do_wp_page+0xf9c/0x3fe8 [ 20.937014][ T4651] handle_mm_fault+0x10d0/0x2450 [ 20.937023][ T4651] do_page_fault+0x768/0xb64 [ 20.937033][ T4651] do_mem_abort+0x70/0x190 [ 20.937041][ T4651] el0_da+0x68/0x23c [ 20.937049][ T4651] el0t_64_sync_handler+0x10c/0x148 [ 20.937057][ T4651] el0t_64_sync+0x198/0x19c Setting up swapspace version 1, size = 127995904 bytes [ 21.074074][ T4610] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SS