last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.178' (ED25519) to the list of known hosts. [ 21.741320][ T4651] cgroup: Unknown subsys name 'net' [ 21.891745][ T4651] cgroup: Unknown subsys name 'cpuset' [ 21.893835][ T4651] cgroup: Unknown subsys name 'rlimit' [ 21.971208][ T4655] [ 21.971619][ T4655] ===================================== [ 21.972526][ T4655] WARNING: bad unlock balance detected! [ 21.973494][ T4655] syzkaller #0 Not tainted [ 21.974181][ T4655] ------------------------------------- [ 21.975068][ T4655] dhcpcd/4655 is trying to release lock (rcu_read_lock) at: [ 21.976259][ T4655] [] rcu_lock_release+0x18/0x40 [ 21.977290][ T4655] but there are no more locks to release! [ 21.978287][ T4655] [ 21.978287][ T4655] other info that might help us debug this: [ 21.979449][ T4655] 1 lock held by dhcpcd/4655: [ 21.980126][ T4655] #0: ffff0000d408acf8 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x158/0xaf8 [ 21.981601][ T4655] [ 21.981601][ T4655] stack backtrace: [ 21.982505][ T4655] CPU: 0 UID: 0 PID: 4655 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT [ 21.983728][ T4655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 21.985189][ T4655] Call trace: [ 21.985694][ T4655] show_stack+0x2c/0x3c (C) [ 21.986406][ T4655] __dump_stack+0x30/0x40 [ 21.987027][ T4655] dump_stack_lvl+0xd8/0x12c [ 21.987697][ T4655] dump_stack+0x1c/0x28 [ 21.988310][ T4655] print_unlock_imbalance_bug+0xf4/0xfc [ 21.989060][ T4655] lock_release+0x1dc/0x3b0 [ 21.989734][ T4655] rcu_lock_release+0x30/0x40 [ 21.990426][ T4655] __zap_vma_range+0x2f44/0x4040 [ 21.991243][ T4655] unmap_vmas+0x254/0x3b8 [ 21.991902][ T4655] exit_mmap+0x1e8/0xaf8 [ 21.992562][ T4655] __mmput+0xe4/0x2f0 [ 21.993188][ T4655] mmput+0x70/0xa8 [ 21.993779][ T4655] exit_mm+0x134/0x1e8 [ 21.994405][ T4655] do_exit+0x518/0x1a6c [ 21.995051][ T4655] do_group_exit+0x194/0x22c [ 21.995779][ T4655] pid_child_should_wake+0x0/0x110 [ 21.996638][ T4655] invoke_syscall+0x98/0x244 [ 21.997321][ T4655] el0_svc_common+0xe8/0x23c [ 21.998091][ T4655] do_el0_svc+0x48/0x58 [ 21.998757][ T4655] el0_svc+0x60/0x25c [ 21.999416][ T4655] el0t_64_sync_handler+0x48/0x148 [ 22.000370][ T4655] el0t_64_sync+0x198/0x19c [ 22.002935][ T4655] ------------[ cut here ]------------ [ 22.002944][ T4655] WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x98/0x104, CPU#1: dhcpcd/4655 [ 22.005579][ T4655] Modules linked in: [ 22.006204][ T4655] CPU: 1 UID: 0 PID: 4655 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT [ 22.007553][ T4655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 22.009299][ T4655] pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 22.010672][ T4655] pc : __rcu_read_unlock+0x98/0x104 [ 22.011695][ T4655] lr : __zap_vma_range+0x2f48/0x4040 [ 22.012686][ T4655] sp : ffff800096d373e0 [ 22.013369][ T4655] x29: ffff800096d373f0 x28: 0000aaaab45c4000 x27: 00e80001166bff43 [ 22.014658][ T4655] x26: 0000aaaab45c5000 x25: dfff800000000000 x24: 00e80001166bff43 [ 22.016012][ T4655] x23: 0000000000000000 x22: 0000000000000000 x21: dfff800000000000 [ 22.017464][ T4655] x20: 1fffe0001a47db70 x19: ffff0000d23edb84 x18: 0000000000000000 [ 22.018826][ T4655] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 [ 22.020144][ T4655] x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 [ 22.021510][ T4655] x11: 00000000000005ca x10: 0000000000000003 x9 : 0000000000000007 [ 22.022974][ T4655] x8 : 0000000000000003 x7 : 0000000000000000 x6 : ffff8000804886d0 [ 22.024359][ T4655] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80008048c3e0 [ 22.025793][ T4655] x2 : 0000000100000000 x1 : ffff0000d23ed700 x0 : ffff0000d23ed700 [ 22.027212][ T4655] Call trace: [ 22.027779][ T4655] __rcu_read_unlock+0x98/0x104 (P) [ 22.028678][ T4655] __zap_vma_range+0x2f48/0x4040 [ 22.029591][ T4655] unmap_vmas+0x254/0x3b8 [ 22.030394][ T4655] exit_mmap+0x1e8/0xaf8 [ 22.031106][ T4655] __mmput+0xe4/0x2f0 [ 22.031855][ T4655] mmput+0x70/0xa8 [ 22.032541][ T4655] exit_mm+0x134/0x1e8 [ 22.033342][ T4655] do_exit+0x518/0x1a6c [ 22.034067][ T4655] do_group_exit+0x194/0x22c [ 22.034882][ T4655] pid_child_should_wake+0x0/0x110 [ 22.035792][ T4655] invoke_syscall+0x98/0x244 [ 22.036620][ T4655] el0_svc_common+0xe8/0x23c [ 22.037469][ T4655] do_el0_svc+0x48/0x58 [ 22.038241][ T4655] el0_svc+0x60/0x25c Setting up swapspace version 1, size = 127995904 bytes [ 22.038975][ T4655] el0t_64_sync_handler+0x48/0x148 [ 22.039865][ T4655] el0t_64_sync+0x198/0x19c [ 22.040708][ T4655] irq event stamp: 1233 [ 22.041446][ T4655] hardirqs last enabled at (1233): [] _raw_spin_unlock_irqrestore+0x38/0x98 [ 22.041520][ T4651] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SS [ 22.044866][ T4655] hardirqs last disabled at (1232): [] _raw_spin_lock_irqsave+0x2c/0x7c [ 22.046615][ T4655] softirqs last enabled at (1100): [] local_bh_enable+0x10/0x34 [ 22.048328][ T4655] softirqs last disabled at (1098): [] local_bh_disable+0x10/0x34 [ 22.049991][ T4655] ---[ end trace 0000000000000000 ]--- [ 22.050985][ C1] ------------[ cut here ]------------ [ 22.050991][ C1] WARNING: kernel/rcu/tree_plugin.h:823 at rcu_sched_clock_irq+0xd88/0x13c0, CPU#1: dhcpcd/4655 [ 22.053690][ C1] Modules linked in: [ 22.054463][ C1] CPU: 1 UID: 0 PID: 4655 Comm: dhcpcd Tainted: G W syzkaller #0 PREEMPT [ 22.056196][ C1] Tainted: [W]=WARN [ 22.056863][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 22.058572][ C1] pstate: 834000c5 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 22.059886][ C1] pc : rcu_sched_clock_irq+0xd88/0x13c0 [ 22.060858][ C1] lr : rcu_sched_clock_irq+0x4b4/0x13c0 [ 22.061860][ C1] sp : ffff80008e8e7b60 [ 22.062557][ C1] x29: ffff80008e8e7b90 x28: 1ffff0001111bd74 x27: ffff8000888de000 [ 22.063954][ C1] x26: dfff800000000000 x25: 1fffe0001a47db70 x24: ffff8000888df688 [ 22.065275][ C1] x23: ffff800088896380 x22: ffff0000d23ed708 x21: ffff0000d23edb84 [ 22.066629][ C1] x20: ffff0000d23ed700 x19: 0000000000000000 x18: 0000000000000000 [ 22.067968][ C1] x17: ffff8001258ac000 x16: ffff80008e8e0000 x15: 0000000000000000 [ 22.069290][ C1] x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 [ 22.070673][ C1] x11: 0000000000000000 x10: 0000000000000001 x9 : 0000000000000000 [ 22.072057][ C1] x8 : 00000000ffffffff x7 : 0000000000000000 x6 : ffff800080575264 [ 22.073425][ C1] x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000804d00f8 [ 22.074801][ C1] x2 : 0000000000000000 x1 : ffff0000d23ed700 x0 : 0000000000000000 [ 22.076140][ C1] Call trace: [ 22.076754][ C1] rcu_sched_clock_irq+0xd88/0x13c0 (P) [ 22.077747][ C1] update_process_times+0x320/0x4a4 [ 22.078678][ C1] tick_nohz_handler+0x38c/0x678 [ 22.079562][ C1] __hrtimer_run_queues+0x2e8/0xc08 [ 22.080479][ C1] hrtimer_interrupt+0x300/0x690 [ 22.081426][ C1] arch_timer_handler_virt+0x70/0x84 [ 22.082486][ C1] handle_percpu_devid_irq+0x23c/0x3d0 [ 22.083543][ C1] generic_handle_domain_irq+0xe0/0x140 [ 22.084478][ C1] gic_handle_irq+0x6c/0x180 [ 22.085324][ C1] call_on_irq_stack+0x30/0x48 [ 22.086148][ C1] do_interrupt_handler+0xd4/0x138 [ 22.087100][ C1] el1_interrupt+0x3c/0x60 [ 22.087954][ C1] el1h_64_irq_handler+0x18/0x24 [ 22.088849][ C1] el1h_64_irq+0x6c/0x70 [ 22.089639][ C1] __rcu_read_unlock+0x9c/0x104 (P) [ 22.090584][ C1] __zap_vma_range+0x2f48/0x4040 [ 22.091540][ C1] unmap_vmas+0x254/0x3b8 [ 22.092390][ C1] exit_mmap+0x1e8/0xaf8 [ 22.093254][ C1] __mmput+0xe4/0x2f0 [ 22.093984][ C1] mmput+0x70/0xa8 [ 22.094680][ C1] exit_mm+0x134/0x1e8 [ 22.095426][ C1] do_exit+0x518/0x1a6c [ 22.096233][ C1] do_group_exit+0x194/0x22c [ 22.097109][ C1] pid_child_should_wake+0x0/0x110 [ 22.098037][ C1] invoke_syscall+0x98/0x244 [ 22.098890][ C1] el0_svc_common+0xe8/0x23c [ 22.099755][ C1] do_el0_svc+0x48/0x58 [ 22.100589][ C1] el0_svc+0x60/0x25c [ 22.101305][ C1] el0t_64_sync_handler+0x48/0x148 [ 22.102225][ C1] el0t_64_sync+0x198/0x19c [ 22.103007][ C1] irq event stamp: 1233 [ 22.103725][ C1] hardirqs last enabled at (1233): [] _raw_spin_unlock_irqrestore+0x38/0x98 [ 22.105606][ C1] hardirqs last disabled at (1232): [] _raw_spin_lock_irqsave+0x2c/0x7c [ 22.107320][ C1] softirqs last enabled at (1100): [] local_bh_enable+0x10/0x34 [ 22.109001][ C1] softirqs last disabled at (1098): [] local_bh_disable+0x10/0x34 [ 22.110659][ C1] ---[ end trace 0000000000000000 ]--- [ 22.116116][ T4655] BUG: sleeping function called from invalid context at mm/memory.c:2007 [ 22.116211][ T4655] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 4655, name: dhcpcd [ 22.116222][ T4655] preempt_count: 0, expected: 0 [ 22.116228][ T4655] RCU nest depth: -1, expected: 0 [ 22.116234][ T4655] INFO: lockdep is turned off. [ 22.116240][ T4655] CPU: 1 UID: 0 PID: 4655 Comm: dhcpcd Tainted: G W syzkaller #0 PREEMPT [ 22.116250][ T4655] Tainted: [W]=WARN [ 22.116253][ T4655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 22.116257][ T4655] Call trace: [ 22.116259][ T4655] show_stack+0x2c/0x3c (C) [ 22.116325][ T4655] __dump_stack+0x30/0x40 [ 22.116386][ T4655] dump_stack_lvl+0xd8/0x12c [ 22.116446][ T4655] dump_stack+0x1c/0x28 [ 22.116511][ T4655] __might_resched+0x350/0x4ac [ 22.116572][ T4655] __zap_vma_range+0x3910/0x4040 [ 22.116632][ T4655] unmap_vmas+0x254/0x3b8 [ 22.116691][ T4655] exit_mmap+0x1e8/0xaf8 [ 22.116749][ T4655] __mmput+0xe4/0x2f0 [ 22.116808][ T4655] mmput+0x70/0xa8 [ 22.116866][ T4655] exit_mm+0x134/0x1e8 [ 22.116924][ T4655] do_exit+0x518/0x1a6c [ 22.116982][ T4655] do_group_exit+0x194/0x22c [ 22.117040][ T4655] pid_child_should_wake+0x0/0x110 [ 22.117098][ T4655] invoke_syscall+0x98/0x244 [ 22.117159][ T4655] el0_svc_common+0xe8/0x23c [ 22.117219][ T4655] do_el0_svc+0x48/0x58 [ 22.117279][ T4655] el0_svc+0x60/0x25c [ 22.117339][ T4655] el0t_64_sync_handler+0x48/0x148 [ 22.117399][ T4655] el0t_64_sync+0x198/0x19c