last executing test programs: kernel console output (not intermixed with test programs): [ 102.270417][ T993] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.1.102' (ED25519) to the list of known hosts. [ 111.607826][ T5618] cgroup: Unknown subsys name 'net' [ 111.733174][ T5618] cgroup: Unknown subsys name 'cpuset' [ 111.748309][ T5618] cgroup: Unknown subsys name 'rlimit' [ 111.879770][ T5621] [ 111.882637][ T5621] ===================================== [ 111.890836][ T5621] WARNING: bad unlock balance detected! [ 111.901185][ T5621] syzkaller #0 Not tainted [ 111.910792][ T5621] ------------------------------------- [ 111.921338][ T5621] udevd/5621 is trying to release lock (rcu_read_lock) at: [ 111.934395][ T5621] [] do_wp_page+0x37b4/0x4cc0 [ 111.942401][ T5621] but there are no more locks to release! [ 111.955699][ T5621] [ 111.955699][ T5621] other info that might help us debug this: [ 111.965720][ T5621] 1 lock held by udevd/5621: [ 111.972345][ T5621] #0: ffff888034782a88 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 [ 111.984564][ T5621] [ 111.984564][ T5621] stack backtrace: [ 111.991751][ T5621] CPU: 1 UID: 0 PID: 5621 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) [ 111.991779][ T5621] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 [ 111.991800][ T5621] Call Trace: [ 111.991814][ T5621] [ 111.991822][ T5621] dump_stack_lvl+0xe8/0x150 [ 111.991846][ T5621] ? do_wp_page+0x37b4/0x4cc0 [ 111.991868][ T5621] print_unlock_imbalance_bug+0xdc/0xf0 [ 111.991892][ T5621] lock_release+0x248/0x3c0 [ 111.991911][ T5621] ? do_wp_page+0x37b4/0x4cc0 [ 111.991931][ T5621] do_wp_page+0x4076/0x4cc0 [ 111.991953][ T5621] ? do_wp_page+0x37b4/0x4cc0 [ 111.991976][ T5621] ? __pfx_do_wp_page+0x10/0x10 [ 111.991996][ T5621] ? do_raw_spin_lock+0x12b/0x2f0 [ 111.992022][ T5621] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 111.992051][ T5621] handle_mm_fault+0x151d/0x3170 [ 111.992078][ T5621] ? handle_mm_fault+0xee/0x3170 [ 111.992101][ T5621] ? __pfx_handle_mm_fault+0x10/0x10 [ 111.992122][ T5621] ? lock_vma_under_rcu+0x45a/0x500 [ 111.992146][ T5621] ? do_sys_openat2+0x14c/0x200 [ 111.992180][ T5621] do_user_addr_fault+0xa73/0x1340 [ 111.992213][ T5621] ? rcu_is_watching+0x15/0xb0 [ 111.992234][ T5621] ? trace_page_fault_user+0x84/0x1e0 [ 111.992252][ T5621] exc_page_fault+0x6a/0xc0 [ 111.992273][ T5621] asm_exc_page_fault+0x26/0x30 [ 111.992291][ T5621] RIP: 0033:0x55e029c89346 [ 111.992312][ T5621] Code: 74 0c 48 8b 8e 88 01 00 00 48 85 c9 75 66 bf 01 00 00 00 48 89 e5 e8 d9 b3 ff ff 48 8d 15 9e d9 00 00 be 16 00 00 00 48 89 ef <48> 89 83 88 01 00 00 48 89 c1 31 c0 e8 59 c8 fd ff c6 83 b4 01 00 [ 111.992327][ T5621] RSP: 002b:00007ffd9218b930 EFLAGS: 00010202 [ 111.992344][ T5621] RAX: 0000000006aa6d81 RBX: 000055e051c25ba0 RCX: 00000000000cb3c1 [ 111.992357][ T5621] RDX: 000055e029c96cdc RSI: 0000000000000016 RDI: 00007ffd9218b930 [ 111.992368][ T5621] RBP: 00007ffd9218b930 R08: 0000000006aa6d81 R09: 3fffffffffffffff [ 111.992381][ T5621] R10: 4000000000000000 R11: 0000000000000000 R12: 000000000aba9500 [ 111.992392][ T5621] R13: 0000000003938700 R14: 000055e029cad100 R15: 000055e029cad140 [ 111.992412][ T5621] [ 112.264575][ T5621] ------------[ cut here ]------------ [ 112.371774][ T5621] rrln < 0 || rrln > RCU_NEST_PMAX Setting up swapspace version 1, size = 127995904 bytes [ 112.371863][ T5621] WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x79/0xe0, CPU#0: udevd/5621 [ 112.569887][ T5621] Modules linked in: [ 112.574238][ T5621] CPU: 0 UID: 0 PID: 5621 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) [ 112.594430][ T5621] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 [ 112.607642][ T5621] RIP: 0010:__rcu_read_unlock+0x79/0xe0 [ 112.615089][ T5621] Code: 75 66 41 83 3e 00 75 27 43 0f b6 04 3c 84 c0 75 41 8b 03 3d 00 00 00 40 73 0f 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc cc 90 <0f> 0b 90 eb eb e8 6d 00 00 00 eb d2 89 d9 80 e1 07 80 c1 03 38 c1 [ 112.649086][ T5621] RSP: 0000:ffffc90003967a50 EFLAGS: 00010286 [ 112.658026][ T5621] RAX: 00000000ffffffff RBX: ffff8880373f2384 RCX: 0000000000000046 [ 112.675749][ T5621] RDX: 0000000000000000 RSI: ffffffff8e218610 RDI: ffff8880373f1ec0 [ 112.687368][ T5621] RBP: ffffc90003967c10 R08: 0000000000000003 R09: 0000000000000004 [ 112.698792][ T5621] R10: dffffc0000000000 R11: fffffbfff1d06d14 R12: 1ffff11006e7e470 [ 112.720608][ T5621] R13: dffffc0000000000 R14: ffffea0000499240 R15: dffffc0000000000 [ 112.738186][ T5621] FS: 00007fa0d47b6880(0000) GS:ffff888125290000(0000) knlGS:0000000000000000 [ 112.756434][ T5621] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 112.768047][ T5621] CR2: 00007fa0d47b66e8 CR3: 0000000075686000 CR4: 00000000003526f0 [ 112.780623][ T5621] Call Trace: [ 112.785548][ T5621] [ 112.799465][ T5621] do_wp_page+0x407b/0x4cc0 [ 112.809954][ T5621] ? do_wp_page+0x37b4/0x4cc0 [ 112.821433][ T5621] ? __pfx_do_wp_page+0x10/0x10 [ 112.827735][ T5621] ? do_raw_spin_lock+0x12b/0x2f0 [ 112.835142][ T5621] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 112.850590][ T5621] handle_mm_fault+0x151d/0x3170 [ 112.864145][ T5621] ? handle_mm_fault+0xee/0x3170 [ 112.876563][ T5621] ? __pfx_handle_mm_fault+0x10/0x10 [ 112.884589][ T5621] ? lock_vma_under_rcu+0x45a/0x500 [ 112.893363][ T5621] ? do_sys_openat2+0x14c/0x200 [ 112.911704][ T5621] do_user_addr_fault+0xa73/0x1340 [ 112.921867][ T5621] ? rcu_is_watching+0x15/0xb0 [ 112.928519][ T5621] ? trace_page_fault_user+0x84/0x1e0 [ 112.939014][ T5621] exc_page_fault+0x6a/0xc0 [ 112.946336][ T5621] asm_exc_page_fault+0x26/0x30 [ 112.954506][ T5621] RIP: 0033:0x55e029c89346 [ 112.960352][ T5621] Code: 74 0c 48 8b 8e 88 01 00 00 48 85 c9 75 66 bf 01 00 00 00 48 89 e5 e8 d9 b3 ff ff 48 8d 15 9e d9 00 00 be 16 00 00 00 48 89 ef <48> 89 83 88 01 00 00 48 89 c1 31 c0 e8 59 c8 fd ff c6 83 b4 01 00 [ 112.986016][ T5621] RSP: 002b:00007ffd9218b930 EFLAGS: 00010202 [ 112.993093][ T5621] RAX: 0000000006aa6d81 RBX: 000055e051c25ba0 RCX: 00000000000cb3c1 [ 113.002327][ T5621] RDX: 000055e029c96cdc RSI: 0000000000000016 RDI: 00007ffd9218b930 [ 113.011931][ T5621] RBP: 00007ffd9218b930 R08: 0000000006aa6d81 R09: 3fffffffffffffff [ 113.021540][ T5621] R10: 4000000000000000 R11: 0000000000000000 R12: 000000000aba9500 [ 113.032181][ T5621] R13: 0000000003938700 R14: 000055e029cad100 R15: 000055e029cad140 [ 113.048610][ T5621] [ 113.052462][ T5621] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 113.060928][ T5621] CPU: 0 UID: 0 PID: 5621 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) [ 113.072587][ T5621] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 [ 113.085130][ T5621] Call Trace: [ 113.088780][ T5621] [ 113.093062][ T5621] vpanic+0x56c/0xa60 [ 113.098999][ T5621] ? __pfx__printk+0x10/0x10 [ 113.105204][ T5621] ? __pfx_vpanic+0x10/0x10 [ 113.110595][ T5621] ? is_bpf_text_address+0x292/0x2b0 [ 113.117798][ T5621] ? is_bpf_text_address+0x26/0x2b0 [ 113.127771][ T5621] panic+0xc5/0xd0 [ 113.133797][ T5621] ? __pfx_panic+0x10/0x10 [ 113.145433][ T5621] __warn+0x315/0x4c0 [ 113.151051][ T5621] ? __rcu_read_unlock+0x79/0xe0 [ 113.160992][ T5621] ? __rcu_read_unlock+0x79/0xe0 [ 113.168089][ T5621] __report_bug+0x29a/0x540 [ 113.178158][ T5621] ? __rcu_read_unlock+0x79/0xe0 [ 113.185706][ T5621] ? __pfx___report_bug+0x10/0x10 [ 113.197095][ T5621] ? __rcu_read_unlock+0x79/0xe0 [ 113.203861][ T5621] report_bug+0x16a/0x220 [ 113.209284][ T5621] ? __rcu_read_unlock+0x79/0xe0 [ 113.214571][ T5621] ? __rcu_read_unlock+0x7b/0xe0 [ 113.220879][ T5621] handle_bug+0x9c/0x200 [ 113.226089][ T5621] exc_invalid_op+0x1a/0x50 [ 113.231501][ T5621] asm_exc_invalid_op+0x1a/0x20 [ 113.236775][ T5621] RIP: 0010:__rcu_read_unlock+0x79/0xe0 [ 113.242763][ T5621] Code: 75 66 41 83 3e 00 75 27 43 0f b6 04 3c 84 c0 75 41 8b 03 3d 00 00 00 40 73 0f 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc cc 90 <0f> 0b 90 eb eb e8 6d 00 00 00 eb d2 89 d9 80 e1 07 80 c1 03 38 c1 [ 113.266845][ T5621] RSP: 0000:ffffc90003967a50 EFLAGS: 00010286 [ 113.274010][ T5621] RAX: 00000000ffffffff RBX: ffff8880373f2384 RCX: 0000000000000046 [ 113.285390][ T5621] RDX: 0000000000000000 RSI: ffffffff8e218610 RDI: ffff8880373f1ec0 [ 113.297301][ T5621] RBP: ffffc90003967c10 R08: 0000000000000003 R09: 0000000000000004 [ 113.310841][ T5621] R10: dffffc0000000000 R11: fffffbfff1d06d14 R12: 1ffff11006e7e470 [ 113.324360][ T5621] R13: dffffc0000000000 R14: ffffea0000499240 R15: dffffc0000000000 [ 113.339842][ T5621] do_wp_page+0x407b/0x4cc0 [ 113.349441][ T5621] ? do_wp_page+0x37b4/0x4cc0 [ 113.360905][ T5621] ? __pfx_do_wp_page+0x10/0x10 [ 113.368351][ T5621] ? do_raw_spin_lock+0x12b/0x2f0 [ 113.378200][ T5621] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 113.392492][ T5621] handle_mm_fault+0x151d/0x3170 [ 113.403600][ T5621] ? handle_mm_fault+0xee/0x3170 [ 113.412053][ T5621] ? __pfx_handle_mm_fault+0x10/0x10 [ 113.419038][ T5621] ? lock_vma_under_rcu+0x45a/0x500 [ 113.427747][ T5621] ? do_sys_openat2+0x14c/0x200 [ 113.443198][ T5621] do_user_addr_fault+0xa73/0x1340 [ 113.451563][ T5621] ? rcu_is_watching+0x15/0xb0 [ 113.459094][ T5621] ? trace_page_fault_user+0x84/0x1e0 [ 113.467230][ T5621] exc_page_fault+0x6a/0xc0 [ 113.473194][ T5621] asm_exc_page_fault+0x26/0x30 [ 113.479941][ T5621] RIP: 0033:0x55e029c89346 [ 113.484764][ T5621] Code: 74 0c 48 8b 8e 88 01 00 00 48 85 c9 75 66 bf 01 00 00 00 48 89 e5 e8 d9 b3 ff ff 48 8d 15 9e d9 00 00 be 16 00 00 00 48 89 ef <48> 89 83 88 01 00 00 48 89 c1 31 c0 e8 59 c8 fd ff c6 83 b4 01 00 [ 113.512377][ T5621] RSP: 002b:00007ffd9218b930 EFLAGS: 00010202 [ 113.521190][ T5621] RAX: 0000000006aa6d81 RBX: 000055e051c25ba0 RCX: 00000000000cb3c1 [ 113.532702][ T5621] RDX: 000055e029c96cdc RSI: 0000000000000016 RDI: 00007ffd9218b930 [ 113.546665][ T5621] RBP: 00007ffd9218b930 R08: 0000000006aa6d81 R09: 3fffffffffffffff [ 113.559619][ T5621] R10: 4000000000000000 R11: 0000000000000000 R12: 000000000aba9500 [ 113.570338][ T5621] R13: 0000000003938700 R14: 000055e029cad100 R15: 000055e029cad140 [ 113.590000][ T5621] [ 113.594861][ T5621] Kernel Offset: disabled [ 113.604870][ T5621] Rebooting in 86400 seconds..