last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.0.82' (ED25519) to the list of known hosts. [ 20.780672][ T4580] cgroup: Unknown subsys name 'net' [ 20.892831][ T4580] cgroup: Unknown subsys name 'cpuset' [ 20.895430][ T4580] cgroup: Unknown subsys name 'rlimit' [ 21.009483][ T4639] [ 21.009929][ T4639] ================================================ [ 21.011053][ T4639] WARNING: lock held when returning to user space! [ 21.012159][ T4639] syzkaller #0 Not tainted [ 21.012913][ T4639] ------------------------------------------------ [ 21.014044][ T4639] dhcpcd/4639 is leaving the kernel with locks still held! [ 21.015180][ T4639] 1 lock held by dhcpcd/4639: [ 21.015957][ T4639] #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x10/0x4c [ 21.017612][ T4639] ------------[ cut here ]------------ [ 21.017618][ T4639] Voluntary context switch within RCU read-side critical section! [ 21.017656][ T4639] WARNING: kernel/rcu/tree_plugin.h:332 at rcu_note_context_switch+0xba8/0xeb8, CPU#0: dhcpcd/4639 [ 21.021552][ T4639] Modules linked in: [ 21.022285][ T4639] CPU: 0 UID: 0 PID: 4639 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT [ 21.023757][ T4639] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 21.025550][ T4639] pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 21.026888][ T4639] pc : rcu_note_context_switch+0xba8/0xeb8 [ 21.027898][ T4639] lr : rcu_note_context_switch+0xba8/0xeb8 [ 21.028841][ T4639] sp : ffff800096d77b20 [ 21.029503][ T4639] x29: ffff800096d77ba0 x28: dfff800000000000 x27: dfff800000000000 [ 21.030770][ T4639] x26: 0000000000000000 x25: 1ffff0001111bd74 x24: 0000000000000000 [ 21.032076][ T4639] x23: ffff700012daef98 x22: ffff800125887000 x21: ffff0001ae11c3c0 [ 21.033313][ T4639] x20: ffff0000dd2c8484 x19: ffff0000dd2c8000 x18: 0000000000000000 [ 21.034528][ T4639] x17: ffff800125887000 x16: ffff80008e8d0000 x15: 0000000000000000 [ 21.035760][ T4639] x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 [ 21.037121][ T4639] x11: 00000000000004a6 x10: 0000000000ff0100 x9 : 2f6e7df7b1e7c700 [ 21.038483][ T4639] x8 : 2f6e7df7b1e7c700 x7 : 7865746e6f632079 x6 : ffff8000804886d0 [ 21.039867][ T4639] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f13b0 [ 21.041185][ T4639] x2 : 0000000000000001 x1 : ffff0000dd2c8000 x0 : 0000000000000000 [ 21.042544][ T4639] Call trace: [ 21.043086][ T4639] rcu_note_context_switch+0xba8/0xeb8 (P) [ 21.044121][ T4639] __schedule+0x314/0x2d24 [ 21.044939][ T4639] schedule+0xa4/0x140 [ 21.045618][ T4639] exit_to_user_mode_loop+0x60/0x17c [ 21.046573][ T4639] el0_interrupt+0x190/0x2ac [ 21.047382][ T4639] __el0_irq_handler_common+0x18/0x24 [ 21.048325][ T4639] el0t_64_irq_handler+0x10/0x1c [ 21.049215][ T4639] el0t_64_irq+0x198/0x19c [ 21.050009][ T4639] irq event stamp: 1084 [ 21.050730][ T4639] hardirqs last enabled at (1083): [] memcg1_commit_charge+0xc0/0x12c [ 21.052501][ T4639] hardirqs last disabled at (1084): [] el0_da+0x78/0x23c [ 21.053964][ T4639] softirqs last enabled at (1038): [] local_bh_enable+0x10/0x34 [ 21.055596][ T4639] softirqs last disabled at (1036): [] local_bh_disable+0x10/0x34 [ 21.057265][ T4639] ---[ end trace 0000000000000000 ]--- [ 21.059235][ T4639] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:323 [ 21.060929][ T4639] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 4639, name: dhcpcd [ 21.062635][ T4639] preempt_count: 0, expected: 0 [ 21.062655][ T4639] RCU nest depth: 1, expected: 0 [ 21.062671][ T4639] INFO: lockdep is turned off. [ 21.062683][ T4639] CPU: 0 UID: 0 PID: 4639 Comm: dhcpcd Tainted: G W syzkaller #0 PREEMPT [ 21.062696][ T4639] Tainted: [W]=WARN [ 21.062698][ T4639] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 21.062702][ T4639] Call trace: [ 21.062705][ T4639] show_stack+0x2c/0x3c (C) [ 21.062720][ T4639] __dump_stack+0x30/0x40 [ 21.062729][ T4639] dump_stack_lvl+0xd8/0x12c [ 21.062738][ T4639] dump_stack+0x1c/0x28 [ 21.062745][ T4639] __might_resched+0x350/0x4ac [ 21.062755][ T4639] __might_sleep+0x84/0xdc [ 21.062763][ T4639] prepare_alloc_pages+0x178/0x4b0 [ 21.062774][ T4639] __alloc_frozen_pages_noprof+0x134/0x31c [ 21.062784][ T4639] alloc_pages_mpol+0x1ec/0x464 [ 21.062791][ T4639] folio_alloc_mpol_noprof+0x4c/0x248 [ 21.062798][ T4639] vma_alloc_folio_noprof+0xfc/0x1d8 [ 21.062805][ T4639] folio_prealloc+0x5c/0x1b0 [ 21.062814][ T4639] do_wp_page+0xf9c/0x3fe8 [ 21.062822][ T4639] handle_mm_fault+0x10d0/0x2450 [ 21.062830][ T4639] do_page_fault+0x768/0xb64 [ 21.062839][ T4639] do_mem_abort+0x70/0x190 [ 21.062848][ T4639] el0_da+0x68/0x23c [ 21.062856][ T4639] el0t_64_sync_handler+0x10c/0x148 [ 21.062864][ T4639] el0t_64_sync+0x198/0x19c Setting up swapspace version 1, size = 127995904 bytes [ 21.099688][ T4580] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SS