last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.188' (ED25519) to the list of known hosts. [ 22.344795][ T4651] cgroup: Unknown subsys name 'net' [ 22.445959][ T4651] cgroup: Unknown subsys name 'cpuset' [ 22.448508][ T4651] cgroup: Unknown subsys name 'rlimit' [ 22.574479][ T4655] ------------[ cut here ]------------ [ 22.574493][ T4655] WARNING: ./include/linux/memcontrol.h:380 at folio_lruvec_relock_irqsave+0x320/0x3a8, CPU#1: dhcpcd/4655 [ 22.577220][ T4655] Modules linked in: [ 22.577879][ T4655] CPU: 1 UID: 0 PID: 4655 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT [ 22.579227][ T4655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 22.581091][ T4655] pstate: 834000c5 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 22.582429][ T4655] pc : folio_lruvec_relock_irqsave+0x320/0x3a8 [ 22.583480][ T4655] lr : folio_lruvec_relock_irqsave+0x320/0x3a8 [ 22.584508][ T4655] sp : ffff8000964373a0 [ 22.585251][ T4655] x29: ffff8000964373a0 x28: 1fffffbff86a96a0 x27: 00000000f5000000 [ 22.586722][ T4655] x26: ffff0000c1939b00 x25: 1ffff00012c86e97 x24: dfff800000000000 [ 22.588143][ T4655] x23: 0000000000000000 x22: ffff0000c1862980 x21: ffff8000964374e0 [ 22.589565][ T4655] x20: fffffdffc354b500 x19: ffff8000964374b8 x18: 00000000ffffffff [ 22.590978][ T4655] x17: ffff80008a0cdc80 x16: ffff80008a3b24b8 x15: ffff0000cb5c0b50 [ 22.592299][ T4655] x14: ffff0000cb5c0b30 x13: 0000000000000001 x12: 0000000000000000 [ 22.593690][ T4655] x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000001 [ 22.595031][ T4655] x8 : 0000000000000000 x7 : ffff800080bce9cc x6 : 0000000000000000 [ 22.596436][ T4655] x5 : 0000000000000030 x4 : 0000000000000000 x3 : ffff800080941e90 [ 22.597830][ T4655] x2 : 0000000000000000 x1 : ffff0000cb5c0000 x0 : 0000000000000000 [ 22.599308][ T4655] Call trace: [ 22.599894][ T4655] folio_lruvec_relock_irqsave+0x320/0x3a8 (P) [ 22.600917][ T4655] __page_cache_release+0xa8/0x860 [ 22.601807][ T4655] folios_put_refs+0x57c/0x8dc [ 22.602579][ T4655] free_pages_and_swap_cache+0x238/0x3e0 [ 22.603524][ T4655] tlb_flush_mmu+0xf0/0x33c [ 22.604338][ T4655] tlb_finish_mmu+0xf4/0x228 [ 22.605085][ T4655] exit_mmap+0x3d0/0xaf8 [ 22.605854][ T4655] __mmput+0xe4/0x2f0 [ 22.606521][ T4655] mmput+0x70/0xa8 [ 22.607122][ T4655] exit_mm+0x134/0x1e8 [ 22.607828][ T4655] do_exit+0x518/0x1a6c [ 22.608558][ T4655] do_group_exit+0x194/0x22c [ 22.609332][ T4655] pid_child_should_wake+0x0/0x110 [ 22.610241][ T4655] invoke_syscall+0x98/0x244 [ 22.611070][ T4655] el0_svc_common+0xe8/0x23c [ 22.611853][ T4655] do_el0_svc+0x48/0x58 [ 22.612589][ T4655] el0_svc+0x60/0x25c [ 22.613336][ T4655] el0t_64_sync_handler+0x48/0x148 [ 22.614255][ T4655] el0t_64_sync+0x198/0x19c [ 22.615059][ T4655] irq event stamp: 1602 [ 22.615766][ T4655] hardirqs last enabled at (1601): [] _raw_spin_unlock_irqrestore+0x38/0x98 [ 22.617441][ T4655] hardirqs last disabled at (1602): [] _raw_spin_lock_irqsave+0x2c/0x7c [ 22.619109][ T4655] softirqs last enabled at (1134): [] local_bh_enable+0x10/0x34 [ 22.620688][ T4655] softirqs last disabled at (1132): [] local_bh_disable+0x10/0x34 [ 22.622327][ T4655] ---[ end trace 0000000000000000 ]--- [ 22.623293][ T4655] ------------[ cut here ]------------ [ 22.623297][ T4655] WARNING: ./include/linux/memcontrol.h:380 at __page_cache_release+0x6ec/0x860, CPU#1: dhcpcd/4655 [ 22.625893][ T4655] Modules linked in: [ 22.626577][ T4655] CPU: 1 UID: 0 PID: 4655 Comm: dhcpcd Tainted: G W syzkaller #0 PREEMPT [ 22.628266][ T4655] Tainted: [W]=WARN [ 22.628905][ T4655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 22.630689][ T4655] pstate: 834000c5 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 22.631937][ T4655] pc : __page_cache_release+0x6ec/0x860 [ 22.632810][ T4655] lr : __page_cache_release+0x6ec/0x860 [ 22.633725][ T4655] sp : ffff800096437400 [ 22.634474][ T4655] x29: ffff800096437420 x28: 1fffffbff86a96a0 x27: dfff800000000000 [ 22.635790][ T4655] x26: 1fffffbff86a96a1 x25: 0000000000000000 x24: ffff0000c1862980 [ 22.637187][ T4655] x23: ffff0000c18c0c08 x22: 0000000000000000 x21: 1fffe00018318181 [ 22.638582][ T4655] x20: fffffdffc354b508 x19: fffffdffc354b500 x18: 00000000ffffffff [ 22.639917][ T4655] x17: ffff80008a0cdc80 x16: ffff80008a3b24b8 x15: ffff0000cb5c0b50 [ 22.641642][ T4655] x14: ffff0000cb5c0b30 x13: 0000000000000001 x12: 0000000000000000 [ 22.643004][ T4655] x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000001 [ 22.644362][ T4655] x8 : 0000000000000000 x7 : ffff800080bce9cc x6 : 0000000000000000 [ 22.645620][ T4655] x5 : 0000000000000030 x4 : 0000000000000000 x3 : ffff800080940708 [ 22.646902][ T4655] x2 : 0000000000000000 x1 : ffff0000cb5c0000 x0 : 0000000000000000 [ 22.648160][ T4655] Call trace: [ 22.648717][ T4655] __page_cache_release+0x6ec/0x860 (P) [ 22.649670][ T4655] folios_put_refs+0x57c/0x8dc [ 22.650485][ T4655] free_pages_and_swap_cache+0x238/0x3e0 [ 22.651457][ T4655] tlb_flush_mmu+0xf0/0x33c [ 22.652267][ T4655] tlb_finish_mmu+0xf4/0x228 [ 22.653070][ T4655] exit_mmap+0x3d0/0xaf8 [ 22.653818][ T4655] __mmput+0xe4/0x2f0 [ 22.654490][ T4655] mmput+0x70/0xa8 [ 22.655152][ T4655] exit_mm+0x134/0x1e8 [ 22.655827][ T4655] do_exit+0x518/0x1a6c [ 22.656531][ T4655] do_group_exit+0x194/0x22c [ 22.657377][ T4655] pid_child_should_wake+0x0/0x110 [ 22.658312][ T4655] invoke_syscall+0x98/0x244 [ 22.659109][ T4655] el0_svc_common+0xe8/0x23c [ 22.659856][ T4655] do_el0_svc+0x48/0x58 [ 22.660498][ T4655] el0_svc+0x60/0x25c [ 22.661169][ T4655] el0t_64_sync_handler+0x48/0x148 [ 22.662083][ T4655] el0t_64_sync+0x198/0x19c [ 22.662867][ T4655] irq event stamp: 1602 [ 22.663589][ T4655] hardirqs last enabled at (1601): [] _raw_spin_unlock_irqrestore+0x38/0x98 [ 22.665347][ T4655] hardirqs last disabled at (1602): [] _raw_spin_lock_irqsave+0x2c/0x7c [ 22.667041][ T4655] softirqs last enabled at (1134): [] local_bh_enable+0x10/0x34 [ 22.668692][ T4655] softirqs last disabled at (1132): [] local_bh_disable+0x10/0x34 [ 22.670382][ T4655] ---[ end trace 0000000000000000 ]--- [ 22.672723][ T4655] [ 22.673087][ T4655] ===================================== [ 22.674012][ T4655] WARNING: bad unlock balance detected! [ 22.674956][ T4655] syzkaller #0 Tainted: G W [ 22.676091][ T4655] ------------------------------------- [ 22.677030][ T4655] dhcpcd/4655 is trying to release lock (rcu_read_lock) at: [ 22.678269][ T4655] [] rcu_lock_release+0x10/0x38 [ 22.679335][ T4655] but there are no more locks to release! [ 22.680278][ T4655] [ 22.680278][ T4655] other info that might help us debug this: [ 22.681712][ T4655] 1 lock held by dhcpcd/4655: [ 22.682515][ T4655] #0: ffff0000d1fb0d78 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x228/0xaf8 [ 22.684085][ T4655] [ 22.684085][ T4655] stack backtrace: [ 22.685148][ T4655] CPU: 1 UID: 0 PID: 4655 Comm: dhcpcd Tainted: G W syzkaller #0 PREEMPT [ 22.686878][ T4655] Tainted: [W]=WARN [ 22.687510][ T4655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 22.689187][ T4655] Call trace: [ 22.689745][ T4655] show_stack+0x2c/0x3c (C) [ 22.690520][ T4655] __dump_stack+0x30/0x40 [ 22.691244][ T4655] dump_stack_lvl+0xd8/0x12c [ 22.691971][ T4655] dump_stack+0x1c/0x28 [ 22.692684][ T4655] print_unlock_imbalance_bug+0xf4/0xfc [ 22.693644][ T4655] lock_release+0x1dc/0x3b0 [ 22.694475][ T4655] rcu_lock_release+0x2c/0x38 [ 22.695201][ T4655] folios_put_refs+0x7a4/0x8dc [ 22.695896][ T4655] free_pages_and_swap_cache+0x238/0x3e0 [ 22.696791][ T4655] tlb_flush_mmu+0xf0/0x33c [ 22.697564][ T4655] tlb_finish_mmu+0xf4/0x228 [ 22.698353][ T4655] exit_mmap+0x3d0/0xaf8 [ 22.699060][ T4655] __mmput+0xe4/0x2f0 [ 22.699719][ T4655] mmput+0x70/0xa8 [ 22.700424][ T4655] exit_mm+0x134/0x1e8 [ 22.701146][ T4655] do_exit+0x518/0x1a6c [ 22.701880][ T4655] do_group_exit+0x194/0x22c [ 22.702649][ T4655] pid_child_should_wake+0x0/0x110 [ 22.703553][ T4655] invoke_syscall+0x98/0x244 [ 22.704319][ T4655] el0_svc_common+0xe8/0x23c [ 22.705160][ T4655] do_el0_svc+0x48/0x58 [ 22.705872][ T4655] el0_svc+0x60/0x25c [ 22.706559][ T4655] el0t_64_sync_handler+0x48/0x148 [ 22.707400][ T4655] el0t_64_sync+0x198/0x19c [ 22.712071][ T4655] ------------[ cut here ]------------ [ 22.712079][ T4655] WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x98/0x104, CPU#1: dhcpcd/4655 [ 22.714549][ T4655] Modules linked in: [ 22.715283][ T4655] CPU: 1 UID: 0 PID: 4655 Comm: dhcpcd Tainted: G W syzkaller #0 PREEMPT [ 22.716936][ T4655] Tainted: [W]=WARN [ 22.717528][ T4655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 22.719360][ T4655] pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 22.720649][ T4655] pc : __rcu_read_unlock+0x98/0x104 [ 22.721664][ T4655] lr : folios_put_refs+0x7a8/0x8dc [ 22.722576][ T4655] sp : ffff800096437440 [ 22.723306][ T4655] x29: ffff800096437450 x28: ffff800096437778 x27: ffff8000964376b8 [ 22.724609][ T4655] x26: 000000000000001e x25: fffffdffc76e19c0 x24: ffff8000964375c0 [ 22.725990][ T4655] x23: fffffdffc76e19f4 x22: ffff800096437778 x21: dfff800000000000 [ 22.727322][ T4655] x20: 1fffe000196b8090 x19: ffff0000cb5c0484 x18: 1fffe00035c25820 [ 22.728728][ T4655] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 [ 22.730060][ T4655] x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 [ 22.731472][ T4655] x11: 000000000000065a x10: 0000000000000003 x9 : 0000000000000007 [ 22.732819][ T4655] x8 : 0000000000000003 x7 : 0000000000000000 x6 : ffff8000804886d0 [ 22.734182][ T4655] x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80008048c3e0 [ 22.735638][ T4655] x2 : 0000000100000000 x1 : ffff0000cb5c0000 x0 : ffff0000cb5c0000 [ 22.737020][ T4655] Call trace: [ 22.737560][ T4655] __rcu_read_unlock+0x98/0x104 (P) [ 22.738521][ T4655] folios_put_refs+0x7a8/0x8dc [ 22.739363][ T4655] free_pages_and_swap_cache+0x238/0x3e0 [ 22.740408][ T4655] tlb_flush_mmu+0xf0/0x33c [ 22.741227][ T4655] tlb_finish_mmu+0xf4/0x228 [ 22.742024][ T4655] exit_mmap+0x3d0/0xaf8 [ 22.742818][ T4655] __mmput+0xe4/0x2f0 [ 22.743466][ T4655] mmput+0x70/0xa8 [ 22.744116][ T4655] exit_mm+0x134/0x1e8 [ 22.744752][ T4655] do_exit+0x518/0x1a6c [ 22.745475][ T4655] do_group_exit+0x194/0x22c [ 22.746328][ T4655] pid_child_should_wake+0x0/0x110 [ 22.747227][ T4655] invoke_syscall+0x98/0x244 [ 22.748092][ T4655] el0_svc_common+0xe8/0x23c [ 22.748943][ T4655] do_el0_svc+0x48/0x58 [ 22.749815][ T4655] el0_svc+0x60/0x25c [ 22.750587][ T4655] el0t_64_sync_handler+0x48/0x148 [ 22.751548][ T4655] el0t_64_sync+0x198/0x19c [ 22.752449][ T4655] irq event stamp: 1631 Setting up swapspace version 1, size = 127995904 bytes [ 22.753112][ T4655] hardirqs last enabled at (1631): [] finish_lock_switch+0x160/0x204 [ 22.754859][ T4655] hardirqs last disabled at (1630): [] __schedule+0x308/0x2d24 [ 22.756080][ T4651] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SS [ 22.758020][ T4655] softirqs last enabled at (1628): [] handle_softirqs+0xbc4/0xd34 [ 22.759665][ T4655] softirqs last disabled at (1605): [] __do_softirq+0x14/0x20 [ 22.761342][ T4655] ---[ end trace 0000000000000000 ]--- [ 22.762344][ C1] ------------[ cut here ]------------ [ 22.762349][ C1] WARNING: kernel/rcu/tree_plugin.h:823 at rcu_sched_clock_irq+0xd88/0x13c0, CPU#1: dhcpcd/4655 [ 22.765140][ C1] Modules linked in: [ 22.765880][ C1] CPU: 1 UID: 0 PID: 4655 Comm: dhcpcd Tainted: G W syzkaller #0 PREEMPT [ 22.767567][ C1] Tainted: [W]=WARN [ 22.768222][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 22.770007][ C1] pstate: 834000c5 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 22.771440][ C1] pc : rcu_sched_clock_irq+0xd88/0x13c0 [ 22.772424][ C1] lr : rcu_sched_clock_irq+0x4b4/0x13c0 [ 22.773474][ C1] sp : ffff80008e8e7b60 [ 22.774193][ C1] x29: ffff80008e8e7b90 x28: 1ffff0001111bd74 x27: ffff8000888de000 [ 22.775493][ C1] x26: dfff800000000000 x25: 1fffe000196b8090 x24: ffff8000888df688 [ 22.776982][ C1] x23: ffff800088896380 x22: ffff0000cb5c0008 x21: ffff0000cb5c0484 [ 22.778403][ C1] x20: ffff0000cb5c0000 x19: 0000000000000000 x18: 1fffe00035c25820 [ 22.779773][ C1] x17: ffff8001258ac000 x16: ffff80008e8e0000 x15: 0000000000000000 [ 22.781146][ C1] x14: 00004c4b40000000 x13: 0000000000000001 x12: 0000000000000000 [ 22.782532][ C1] x11: 0000000000000000 x10: 0000000000000001 x9 : 0000000000000000 [ 22.783884][ C1] x8 : 00000000ffffffff x7 : 7fffffffffffffff x6 : 00004c4b40000000 [ 22.785226][ C1] x5 : ffff80008e5c10e8 x4 : ffff80008e5c1218 x3 : ffff8000804d00f8 [ 22.786593][ C1] x2 : 0000000000000000 x1 : ffff0000cb5c0000 x0 : 0000000000000000 [ 22.787958][ C1] Call trace: [ 22.788500][ C1] rcu_sched_clock_irq+0xd88/0x13c0 (P) [ 22.789515][ C1] update_process_times+0x320/0x4a4 [ 22.790485][ C1] tick_nohz_handler+0x38c/0x678 [ 22.791365][ C1] __hrtimer_run_queues+0x2e8/0xc08 [ 22.792270][ C1] hrtimer_interrupt+0x300/0x690 [ 22.793166][ C1] arch_timer_handler_virt+0x70/0x84 [ 22.794180][ C1] handle_percpu_devid_irq+0x23c/0x3d0 [ 22.795159][ C1] generic_handle_domain_irq+0xe0/0x140 [ 22.796226][ C1] gic_handle_irq+0x6c/0x180 [ 22.797104][ C1] call_on_irq_stack+0x30/0x48 [ 22.797980][ C1] do_interrupt_handler+0xd4/0x138 [ 22.798922][ C1] el1_interrupt+0x3c/0x60 [ 22.799770][ C1] el1h_64_irq_handler+0x18/0x24 [ 22.800710][ C1] el1h_64_irq+0x6c/0x70 [ 22.801525][ C1] __rcu_read_unlock+0x9c/0x104 (P) [ 22.802406][ C1] folios_put_refs+0x7a8/0x8dc [ 22.803264][ C1] free_pages_and_swap_cache+0x238/0x3e0 [ 22.804265][ C1] tlb_flush_mmu+0xf0/0x33c [ 22.805085][ C1] tlb_finish_mmu+0xf4/0x228 [ 22.805966][ C1] exit_mmap+0x3d0/0xaf8 [ 22.806754][ C1] __mmput+0xe4/0x2f0 [ 22.807469][ C1] mmput+0x70/0xa8 [ 22.808156][ C1] exit_mm+0x134/0x1e8 [ 22.808922][ C1] do_exit+0x518/0x1a6c [ 22.809754][ C1] do_group_exit+0x194/0x22c [ 22.810595][ C1] pid_child_should_wake+0x0/0x110 [ 22.811504][ C1] invoke_syscall+0x98/0x244 [ 22.812290][ C1] el0_svc_common+0xe8/0x23c [ 22.813247][ C1] do_el0_svc+0x48/0x58 [ 22.814047][ C1] el0_svc+0x60/0x25c [ 22.814794][ C1] el0t_64_sync_handler+0x48/0x148 [ 22.815832][ C1] el0t_64_sync+0x198/0x19c [ 22.816625][ C1] irq event stamp: 1631 [ 22.817315][ C1] hardirqs last enabled at (1631): [] finish_lock_switch+0x160/0x204 [ 22.819047][ C1] hardirqs last disabled at (1630): [] __schedule+0x308/0x2d24 [ 22.820732][ C1] softirqs last enabled at (1628): [] handle_softirqs+0xbc4/0xd34 [ 22.822453][ C1] softirqs last disabled at (1605): [] __do_softirq+0x14/0x20 [ 22.824040][ C1] ---[ end trace 0000000000000000 ]--- [ 22.826174][ T4655] BUG: sleeping function called from invalid context at mm/mmu_gather.c:142 [ 22.827655][ T4655] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 4655, name: dhcpcd [ 22.829101][ T4655] preempt_count: 0, expected: 0 [ 22.829924][ T4655] RCU nest depth: -1, expected: 0 [ 22.830795][ T4655] INFO: lockdep is turned off. [ 22.831716][ T4655] CPU: 1 UID: 0 PID: 4655 Comm: dhcpcd Tainted: G W syzkaller #0 PREEMPT [ 22.831730][ T4655] Tainted: [W]=WARN [ 22.831733][ T4655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 22.831738][ T4655] Call trace: [ 22.831741][ T4655] show_stack+0x2c/0x3c (C) [ 22.831809][ T4655] __dump_stack+0x30/0x40 [ 22.831871][ T4655] dump_stack_lvl+0xd8/0x12c [ 22.831933][ T4655] dump_stack+0x1c/0x28 [ 22.831998][ T4655] __might_resched+0x350/0x4ac [ 22.832061][ T4655] tlb_flush_mmu+0x114/0x33c [ 22.832121][ T4655] tlb_finish_mmu+0xf4/0x228 [ 22.832181][ T4655] exit_mmap+0x3d0/0xaf8 [ 22.832241][ T4655] __mmput+0xe4/0x2f0 [ 22.832300][ T4655] mmput+0x70/0xa8 [ 22.832360][ T4655] exit_mm+0x134/0x1e8 [ 22.832419][ T4655] do_exit+0x518/0x1a6c [ 22.832478][ T4655] do_group_exit+0x194/0x22c [ 22.832537][ T4655] pid_child_should_wake+0x0/0x110 [ 22.832597][ T4655] invoke_syscall+0x98/0x244 [ 22.832659][ T4655] el0_svc_common+0xe8/0x23c [ 22.832720][ T4655] do_el0_svc+0x48/0x58 [ 22.832782][ T4655] el0_svc+0x60/0x25c [ 22.832843][ T4655] el0t_64_sync_handler+0x48/0x148 [ 22.832904][ T4655] el0t_64_sync+0x198/0x19c