last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.0.50' (ED25519) to the list of known hosts. [ 21.514084][ T4635] cgroup: Unknown subsys name 'net' [ 21.594064][ T4635] cgroup: Unknown subsys name 'cpuset' [ 21.596501][ T4635] cgroup: Unknown subsys name 'rlimit' [ 21.598119][ T4652] [ 21.598509][ T4652] ================================================ [ 21.599662][ T4652] WARNING: lock held when returning to user space! [ 21.600833][ T4652] syzkaller #0 Not tainted [ 21.601607][ T4652] ------------------------------------------------ [ 21.602697][ T4652] dhcpcd-run-hook/4652 is leaving the kernel with locks still held! [ 21.604051][ T4652] 1 lock held by dhcpcd-run-hook/4652: [ 21.605043][ T4652] #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x10/0x4c [ 21.606820][ T4652] ------------[ cut here ]------------ [ 21.606826][ T4652] Voluntary context switch within RCU read-side critical section! [ 21.606857][ T4652] WARNING: kernel/rcu/tree_plugin.h:332 at rcu_note_context_switch+0xba8/0xeb8, CPU#0: dhcpcd-run-hook/4652 [ 21.611128][ T4652] Modules linked in: [ 21.611811][ T4652] CPU: 0 UID: 0 PID: 4652 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT [ 21.613444][ T4652] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 21.615190][ T4652] pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 21.616601][ T4652] pc : rcu_note_context_switch+0xba8/0xeb8 [ 21.617554][ T4652] lr : rcu_note_context_switch+0xba8/0xeb8 [ 21.618587][ T4652] sp : ffff800094c17b20 [ 21.619354][ T4652] x29: ffff800094c17ba0 x28: dfff800000000000 x27: dfff800000000000 [ 21.620634][ T4652] x26: 0000000000000000 x25: 1ffff0001111bd74 x24: 0000000000000000 [ 21.622024][ T4652] x23: ffff700012982f98 x22: ffff800125887000 x21: ffff0001ae11c3c0 [ 21.623476][ T4652] x20: ffff0000d00fdb84 x19: ffff0000d00fd700 x18: 0000000000000000 [ 21.624885][ T4652] x17: ffff800125887000 x16: ffff80008e8d0000 x15: 0000000000000000 [ 21.626320][ T4652] x14: 00000000ffff8000 x13: 0000000000000001 x12: 0000000000000000 [ 21.627784][ T4652] x11: 000000000000051e x10: 0000000000ff0100 x9 : da297d454a1dd800 [ 21.629166][ T4652] x8 : da297d454a1dd800 x7 : 7865746e6f632079 x6 : ffff8000804886d0 [ 21.630548][ T4652] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f13b0 [ 21.631982][ T4652] x2 : 0000000000000001 x1 : ffff0000d00fd700 x0 : 0000000000000000 [ 21.633338][ T4652] Call trace: [ 21.633881][ T4652] rcu_note_context_switch+0xba8/0xeb8 (P) [ 21.634835][ T4652] __schedule+0x314/0x2d24 [ 21.635589][ T4652] schedule+0xa4/0x140 [ 21.636319][ T4652] exit_to_user_mode_loop+0x60/0x17c [ 21.637222][ T4652] el0_interrupt+0x190/0x2ac [ 21.637986][ T4652] __el0_irq_handler_common+0x18/0x24 [ 21.638940][ T4652] el0t_64_irq_handler+0x10/0x1c [ 21.639840][ T4652] el0t_64_irq+0x198/0x19c [ 21.640608][ T4652] irq event stamp: 234 [ 21.641262][ T4652] hardirqs last enabled at (233): [] memcg1_commit_charge+0xc0/0x12c [ 21.642974][ T4652] hardirqs last disabled at (234): [] el0_da+0x78/0x23c [ 21.644516][ T4652] softirqs last enabled at (216): [] local_bh_enable+0x10/0x34 [ 21.646174][ T4652] softirqs last disabled at (214): [] local_bh_disable+0x10/0x34 [ 21.647782][ T4652] ---[ end trace 0000000000000000 ]--- [ 21.648932][ T4652] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:323 [ 21.649679][ T4652] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 4652, name: dhcpcd-run-hook [ 21.649688][ T4652] preempt_count: 0, expected: 0 [ 21.649693][ T4652] RCU nest depth: 1, expected: 0 [ 21.649697][ T4652] INFO: lockdep is turned off. [ 21.649702][ T4652] CPU: 0 UID: 0 PID: 4652 Comm: dhcpcd-run-hook Tainted: G W syzkaller #0 PREEMPT [ 21.649712][ T4652] Tainted: [W]=WARN [ 21.649714][ T4652] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 21.649718][ T4652] Call trace: [ 21.649720][ T4652] show_stack+0x2c/0x3c (C) [ 21.649732][ T4652] __dump_stack+0x30/0x40 [ 21.649741][ T4652] dump_stack_lvl+0xd8/0x12c [ 21.649749][ T4652] dump_stack+0x1c/0x28 [ 21.649757][ T4652] __might_resched+0x350/0x4ac [ 21.649766][ T4652] __might_sleep+0x84/0xdc [ 21.649774][ T4652] prepare_alloc_pages+0x178/0x4b0 [ 21.649784][ T4652] __alloc_frozen_pages_noprof+0x134/0x31c [ 21.649794][ T4652] alloc_pages_mpol+0x1ec/0x464 [ 21.649801][ T4652] folio_alloc_mpol_noprof+0x4c/0x248 [ 21.649808][ T4652] vma_alloc_folio_noprof+0xfc/0x1d8 [ 21.649814][ T4652] folio_prealloc+0x5c/0x1b0 [ 21.649823][ T4652] do_wp_page+0xf9c/0x3fe8 [ 21.649831][ T4652] handle_mm_fault+0x10d0/0x2450 [ 21.649839][ T4652] do_page_fault+0x768/0xb64 [ 21.649848][ T4652] do_mem_abort+0x70/0x190 [ 21.649856][ T4652] el0_da+0x68/0x23c [ 21.649863][ T4652] el0t_64_sync_handler+0x10c/0x148 [ 21.649872][ T4652] el0t_64_sync+0x198/0x19c Setting up swapspace version 1, size = 127995904 bytes [ 21.853106][ T4635] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SS