last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.10.22' (ED25519) to the list of known hosts. [ 83.232864][ T5822] cgroup: Unknown subsys name 'net' [ 83.383283][ T5822] cgroup: Unknown subsys name 'cpuset' [ 83.392955][ T5822] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 85.153359][ T5822] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 91.890867][ T2153] cfg80211: failed to load regulatory.db [ 93.578404][ T5837] [ 93.581021][ T5837] ============================= [ 93.585895][ T5837] WARNING: suspicious RCU usage [ 93.591295][ T5837] 6.16.0-rc4-next-20250701-syzkaller #0 Not tainted [ 93.597928][ T5837] ----------------------------- [ 93.603297][ T5837] fs/proc/proc_sysctl.c:934 suspicious rcu_dereference_check() usage! [ 93.611687][ T5837] [ 93.611687][ T5837] other info that might help us debug this: [ 93.611687][ T5837] [ 93.622057][ T5837] SYZFAIL: failed to recv rpc fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor) [ 93.622057][ T5837] rcu_scheduler_active = 2, debug_locks = 1 [ 93.630178][ T5837] 3 locks held by syz-executor/5837: [ 93.635504][ T5837] #0: ffff88807dbc0428 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 93.644907][ T5837] #1: ffff888031cc7160 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: path_openat+0x8cb/0x3830 [ 93.655758][ T5837] #2: ffff8880798ef9c8 (&lockref->lock){+.+.}-{3:3}, at: d_alloc_parallel+0xbe4/0x15e0 [ 93.666171][ T5837] [ 93.666171][ T5837] stack backtrace: [ 93.672152][ T5837] CPU: 0 UID: 0 PID: 5837 Comm: syz-executor Not tainted 6.16.0-rc4-next-20250701-syzkaller #0 PREEMPT(full) [ 93.672182][ T5837] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 93.672203][ T5837] Call Trace: [ 93.672211][ T5837] [ 93.672220][ T5837] dump_stack_lvl+0x189/0x250 [ 93.672253][ T5837] ? __pfx_dump_stack_lvl+0x10/0x10 [ 93.672279][ T5837] ? __pfx__printk+0x10/0x10 [ 93.672319][ T5837] lockdep_rcu_suspicious+0x140/0x1d0 [ 93.672346][ T5837] proc_sys_compare+0x27d/0x2c0 [ 93.672368][ T5837] ? __pfx_proc_sys_compare+0x10/0x10 [ 93.672394][ T5837] d_alloc_parallel+0x105d/0x15e0 [ 93.672430][ T5837] ? d_alloc_parallel+0x2f0/0x15e0 [ 93.672463][ T5837] ? __pfx_d_alloc_parallel+0x10/0x10 [ 93.672485][ T5837] ? __pfx_default_wake_function+0x10/0x10 [ 93.672533][ T5837] path_openat+0xa3b/0x3830 [ 93.672555][ T5837] ? arch_stack_walk+0xfc/0x150 [ 93.672607][ T5837] ? getname_flags+0xb8/0x540 [ 93.672647][ T5837] ? __pfx_path_openat+0x10/0x10 [ 93.672667][ T5837] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.672713][ T5837] do_filp_open+0x1fa/0x410 [ 93.672734][ T5837] ? __lock_acquire+0xab9/0xd20 [ 93.672774][ T5837] ? __pfx_do_filp_open+0x10/0x10 [ 93.672823][ T5837] ? _raw_spin_unlock+0x28/0x50 [ 93.672844][ T5837] ? alloc_fd+0x64c/0x6c0 [ 93.672886][ T5837] do_sys_openat2+0x121/0x1c0 [ 93.672911][ T5837] ? __pfx_do_sys_openat2+0x10/0x10 [ 93.672929][ T5837] ? fput_close_sync+0x119/0x200 [ 93.672954][ T5837] ? __pfx_fput_close_sync+0x10/0x10 [ 93.672983][ T5837] __x64_sys_openat+0x138/0x170 [ 93.673011][ T5837] do_syscall_64+0xfa/0x3b0 [ 93.673036][ T5837] ? lockdep_hardirqs_on+0x9c/0x150 [ 93.673060][ T5837] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.673082][ T5837] ? clear_bhb_loop+0x60/0xb0 [ 93.673109][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 93.673129][ T5837] RIP: 0033:0x7f33b1b8d211 [ 93.673154][ T5837] Code: 75 57 89 f0 25 00 00 41 00 3d 00 00 41 00 74 49 80 3d 3a 83 1f 00 00 74 6d 89 da 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 93 00 00 00 48 8b 54 24 28 64 48 2b 14 25 [ 93.673171][ T5837] RSP: 002b:00007ffe750b8d60 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 [ 93.673193][ T5837] RAX: ffffffffffffffda RBX: 0000000000080001 RCX: 00007f33b1b8d211 [ 93.673209][ T5837] RDX: 0000000000080001 RSI: 00007f33b1c2ae2b RDI: 00000000ffffff9c [ 93.673223][ T5837] RBP: 00007f33b1c2ae2b R08: 0000000000000000 R09: 0000000000000000 [ 93.673236][ T5837] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000009 [ 93.673249][ T5837] R13: 00007ffe750b8e00 R14: 0000000000000009 R15: 0000000000000000 [ 93.673281][ T5837]