last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '[localhost]:54404' (ED25519) to the list of known hosts. [ 48.390106][ T5647] cgroup: Unknown subsys name 'net' [ 48.534217][ T5647] cgroup: Unknown subsys name 'cpuset' [ 48.540931][ T5647] cgroup: Unknown subsys name 'rlimit' [ 48.632217][ T5691] [ 48.633066][ T5691] ===================================== [ 48.634817][ T5691] WARNING: bad unlock balance detected! [ 48.636655][ T5691] syzkaller #0 Not tainted [ 48.638353][ T5691] ------------------------------------- [ 48.640232][ T5691] dhcpcd-run-hook/5691 is trying to release lock (rcu_read_lock) at: [ 48.642782][ T5691] [] do_fault+0x9b4/0x1750 [ 48.644717][ T5691] but there are no more locks to release! [ 48.646555][ T5691] [ 48.646555][ T5691] other info that might help us debug this: [ 48.649666][ T5691] 1 lock held by dhcpcd-run-hook/5691: [ 48.651479][ T5691] #0: ffff888024e92a88 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11d/0x590 [ 48.654612][ T5691] [ 48.654612][ T5691] stack backtrace: [ 48.656498][ T5691] CPU: 3 UID: 0 PID: 5691 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT(full) [ 48.656513][ T5691] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 48.656519][ T5691] Call Trace: [ 48.656524][ T5691] [ 48.656529][ T5691] dump_stack_lvl+0x100/0x190 [ 48.656542][ T5691] ? do_fault+0x9b4/0x1750 [ 48.656556][ T5691] print_unlock_imbalance_bug.part.0+0xfb/0x106 [ 48.656574][ T5691] ? do_fault+0x9b4/0x1750 [ 48.656586][ T5691] lock_release+0x28d/0x310 [ 48.656597][ T5691] do_fault+0x9b9/0x1750 [ 48.656610][ T5691] __handle_mm_fault+0x187d/0x2a00 [ 48.656627][ T5691] ? reacquire_held_locks+0xce/0x1e0 [ 48.656637][ T5691] ? __pfx___handle_mm_fault+0x10/0x10 [ 48.656653][ T5691] ? lock_vma_under_rcu+0x17c/0x590 [ 48.656687][ T5691] handle_mm_fault+0x36d/0xa20 [ 48.656706][ T5691] do_user_addr_fault+0x5a3/0x12f0 [ 48.656721][ T5691] exc_page_fault+0x6f/0xd0 [ 48.656734][ T5691] asm_exc_page_fault+0x26/0x30 [ 48.656744][ T5691] RIP: 0033:0x7ff2e82ebfeb [ 48.656754][ T5691] Code: 08 48 8b 78 08 48 89 13 e8 5e f9 ff ff 97 e8 bb ff ff ff 48 09 e8 40 0f 95 c5 40 0f b6 ed eb 04 48 83 2b 08 48 95 5a 5b 5d c3 <55> 53 89 fb 48 83 ec 18 48 8b 3e 48 89 74 24 08 e8 a9 e7 f9 ff 80 [ 48.656764][ T5691] RSP: 002b:00007fff321b8cc8 EFLAGS: 00010287 [ 48.656773][ T5691] RAX: 00007ff2e8336190 RBX: 0000564f23c56910 RCX: 0000000000000002 [ 48.656779][ T5691] RDX: 0000564f23c56910 RSI: 0000564f23c5f120 RDI: 0000000000000004 [ 48.656785][ T5691] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000020 [ 48.656792][ T5691] R10: 0000000000000040 R11: 0000000000000000 R12: 0000564f23c5ee50 [ 48.656798][ T5691] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 48.656806][ T5691] [ 48.710482][ T5691] ------------[ cut here ]------------ [ 48.712665][ T5691] rrln < 0 || rrln > RCU_NEST_PMAX [ 48.712692][ T5691] WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x235/0x5e0, CPU#3: dhcpcd-run-hook/5691 [ 48.718151][ T5691] Modules linked in: [ 48.719513][ T5691] CPU: 3 UID: 0 PID: 5691 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT(full) [ 48.757866][ T5691] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 48.795481][ T5691] RIP: 0010:__rcu_read_unlock+0x235/0x5e0 [ 48.797397][ T5691] Code: 74 11 c7 45 58 01 00 00 00 bf 09 00 00 00 e8 92 a3 da ff e8 fd de 22 00 9c 58 f6 c4 02 0f 85 dd 02 00 00 fb e9 57 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e 41 5f e9 d9 f0 9c 09 e8 84 60 87 [ 48.846841][ T5691] RSP: 0000:ffffc90003f9fbe8 EFLAGS: 00010286 [ 48.848800][ T5691] RAX: 00000000ffffffff RBX: ffff88802a16a500 RCX: ffffffff81e7203e [ 48.887950][ T5691] RDX: 0000000000000000 RSI: ffffffff8def466d RDI: ffff88802a16a9c4 [ 49.004248][ T5691] RBP: 0000000000000100 R08: 0000000000000005 R09: 0000000000000000 [ 49.006673][ T5691] R10: 0000000080000000 R11: 0000000000000012 R12: 0000000000000001 [ 49.009159][ T5691] R13: 00000000000000e0 R14: ffffc90003f9fd68 R15: 00000000000000f0 [ 49.048369][ T5691] FS: 00007ff2e7fcfc80(0000) GS:ffff888097480000(0000) knlGS:0000000000000000 [ 49.075128][ T5691] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.077248][ T5691] CR2: 00007ff2e82ebfeb CR3: 0000000050d47000 CR4: 0000000000352ef0 [ 49.114457][ T5691] Call Trace: [ 49.115597][ T5691] [ 49.117224][ T5691] do_fault+0x9be/0x1750 [ 49.189278][ T5691] __handle_mm_fault+0x187d/0x2a00 [ 49.226563][ T5691] ? reacquire_held_locks+0xce/0x1e0 [ 49.228730][ T5691] ? __pfx___handle_mm_fault+0x10/0x10 [ 49.267859][ T5691] ? lock_vma_under_rcu+0x17c/0x590 [ 49.315319][ T5691] handle_mm_fault+0x36d/0xa20 [ 49.318412][ T5691] do_user_addr_fault+0x5a3/0x12f0 [ 49.355878][ T5691] exc_page_fault+0x6f/0xd0 [ 49.357975][ T5691] asm_exc_page_fault+0x26/0x30 [ 49.359688][ T5691] RIP: 0033:0x7ff2e82ebfeb [ 49.399479][ T5691] Code: 08 48 8b 78 08 48 89 13 e8 5e f9 ff ff 97 e8 bb ff ff ff 48 09 e8 40 0f 95 c5 40 0f b6 ed eb 04 48 83 2b 08 48 95 5a 5b 5d c3 <55> 53 89 fb 48 83 ec 18 48 8b 3e 48 89 74 24 08 e8 a9 e7 f9 ff 80 [ 49.443270][ T5691] RSP: 002b:00007fff321b8cc8 EFLAGS: 00010287 [ 49.445203][ T5691] RAX: 00007ff2e8336190 RBX: 0000564f23c56910 RCX: 0000000000000002 [ 49.447685][ T5691] RDX: 0000564f23c56910 RSI: 0000564f23c5f120 RDI: 0000000000000004 [ 49.485571][ T5691] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000020 [ 49.488065][ T5691] R10: 0000000000000040 R11: 0000000000000000 R12: 0000564f23c5ee50 [ 49.529329][ T5691] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 49.568605][ T5691] [ 49.569631][ T5691] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 49.571909][ T5691] CPU: 3 UID: 0 PID: 5691 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT(full) [ 49.574947][ T5691] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 49.578182][ T5691] Call Trace: [ 49.579534][ T5691] [ 49.580906][ T5691] dump_stack_lvl+0x100/0x190 [ 49.583746][ T5691] vpanic+0x552/0x970 [ 49.585522][ T5691] ? __pfx_vpanic+0x10/0x10 [ 49.588971][ T5691] panic+0xd1/0xe0 [ 49.590679][ T5691] ? __pfx_panic+0x10/0x10 [ 49.594340][ T5691] ? check_panic_on_warn+0x1f/0x90 [ 49.596748][ T5691] check_panic_on_warn.cold+0x19/0x34 [ 49.598891][ T5691] ? __rcu_read_unlock+0x235/0x5e0 [ 49.600632][ T5691] __warn.cold+0x191/0x328 [ 49.603213][ T5691] __report_bug+0x296/0x3d0 [ 49.604864][ T5691] ? __rcu_read_unlock+0x235/0x5e0 [ 49.607422][ T5691] ? __pfx___report_bug+0x10/0x10 [ 49.609649][ T5691] ? is_bpf_text_address+0x8a/0x1a0 [ 49.611447][ T5691] ? lock_release+0x245/0x310 [ 49.613280][ T5691] ? bpf_ksym_find+0x124/0x1c0 [ 49.615938][ T5691] ? is_bpf_text_address+0x6f/0x1a0 [ 49.618748][ T5691] ? __rcu_read_unlock+0x235/0x5e0 [ 49.620918][ T5691] report_bug+0xb2/0x220 [ 49.622719][ T5691] ? __rcu_read_unlock+0x235/0x5e0 [ 49.624720][ T5691] handle_bug+0x16a/0x2a0 [ 49.626669][ T5691] exc_invalid_op+0x17/0x50 [ 49.628557][ T5691] asm_exc_invalid_op+0x1a/0x20 [ 49.630290][ T5691] RIP: 0010:__rcu_read_unlock+0x235/0x5e0 [ 49.632206][ T5691] Code: 74 11 c7 45 58 01 00 00 00 bf 09 00 00 00 e8 92 a3 da ff e8 fd de 22 00 9c 58 f6 c4 02 0f 85 dd 02 00 00 fb e9 57 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e 41 5f e9 d9 f0 9c 09 e8 84 60 87 [ 49.638213][ T5691] RSP: 0000:ffffc90003f9fbe8 EFLAGS: 00010286 [ 49.640113][ T5691] RAX: 00000000ffffffff RBX: ffff88802a16a500 RCX: ffffffff81e7203e [ 49.642588][ T5691] RDX: 0000000000000000 RSI: ffffffff8def466d RDI: ffff88802a16a9c4 [ 49.645064][ T5691] RBP: 0000000000000100 R08: 0000000000000005 R09: 0000000000000000 [ 49.647542][ T5691] R10: 0000000080000000 R11: 0000000000000012 R12: 0000000000000001 [ 49.650013][ T5691] R13: 00000000000000e0 R14: ffffc90003f9fd68 R15: 00000000000000f0 [ 49.653887][ T5691] ? nbcon_cpu_emergency_exit+0x11e/0x1e0 [ 49.657822][ T5691] do_fault+0x9be/0x1750 [ 49.660617][ T5691] __handle_mm_fault+0x187d/0x2a00 [ 49.663987][ T5691] ? reacquire_held_locks+0xce/0x1e0 [ 49.666283][ T5691] ? __pfx___handle_mm_fault+0x10/0x10 [ 49.670167][ T5691] ? lock_vma_under_rcu+0x17c/0x590 [ 49.675549][ T5691] handle_mm_fault+0x36d/0xa20 [ 49.678805][ T5691] do_user_addr_fault+0x5a3/0x12f0 [ 49.682424][ T5691] exc_page_fault+0x6f/0xd0 [ 49.684571][ T5691] asm_exc_page_fault+0x26/0x30 [ 49.686364][ T5691] RIP: 0033:0x7ff2e82ebfeb [ 49.687909][ T5691] Code: 08 48 8b 78 08 48 89 13 e8 5e f9 ff ff 97 e8 bb ff ff ff 48 09 e8 40 0f 95 c5 40 0f b6 ed eb 04 48 83 2b 08 48 95 5a 5b 5d c3 <55> 53 89 fb 48 83 ec 18 48 8b 3e 48 89 74 24 08 e8 a9 e7 f9 ff 80 [ 49.693888][ T5691] RSP: 002b:00007fff321b8cc8 EFLAGS: 00010287 [ 49.695789][ T5691] RAX: 00007ff2e8336190 RBX: 0000564f23c56910 RCX: 0000000000000002 [ 49.698256][ T5691] RDX: 0000564f23c56910 RSI: 0000564f23c5f120 RDI: 0000000000000004 [ 49.700718][ T5691] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000020 [ 49.703216][ T5691] R10: 0000000000000040 R11: 0000000000000000 R12: 0000564f23c5ee50 [ 49.705706][ T5691] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 49.711158][ T5691] [ 49.712835][ T5691] Kernel Offset: disabled [ 49.714342][ T5691] Rebooting in 86400 seconds..