last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.60' (ED25519) to the list of known hosts. [ 71.795073][ T5840] cgroup: Unknown subsys name 'net' [ 71.904397][ T5840] cgroup: Unknown subsys name 'cpuset' [ 71.912861][ T5840] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 73.213579][ T5840] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 81.429547][ T5856] [ 81.432200][ T5856] ============================= [ 81.437065][ T5856] WARNING: suspicious RCU usage [ 81.442023][ T5856] 6.16.0-rc4-next-20250703-syzkaller #0 Not tainted [ 81.448620][ T5856] ----------------------------- [ 81.453541][ T5856] fs/proc/proc_sysctl.c:934 suspicious rcu_dereference_check() usage! [ 81.461778][ T5856] [ 81.461778][ T5856] other info that might help us debug this: [ 81.461778][ T5856] [ 81.472099][ T5856] [ 81.472099][ T5856] rcu_scheduler_active = 2, debug_locks = 1 SYZFAIL: failed to recv rpc fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor) [ 81.480261][ T5856] 3 locks held by syz-executor/5856: [ 81.485572][ T5856] #0: ffff8880358c0428 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 81.495115][ T5856] #1: ffff8880231c3c00 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: path_openat+0x8cb/0x3830 [ 81.505957][ T5856] #2: ffff888076d6ee08 (&lockref->lock){+.+.}-{3:3}, at: d_alloc_parallel+0xbe4/0x15e0 [ 81.515947][ T5856] [ 81.515947][ T5856] stack backtrace: [ 81.521933][ T5856] CPU: 1 UID: 0 PID: 5856 Comm: syz-executor Not tainted 6.16.0-rc4-next-20250703-syzkaller #0 PREEMPT(full) [ 81.521956][ T5856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 81.521971][ T5856] Call Trace: [ 81.521977][ T5856] [ 81.521982][ T5856] dump_stack_lvl+0x189/0x250 [ 81.522009][ T5856] ? __pfx_dump_stack_lvl+0x10/0x10 [ 81.522026][ T5856] ? __pfx__printk+0x10/0x10 [ 81.522054][ T5856] lockdep_rcu_suspicious+0x140/0x1d0 [ 81.522075][ T5856] proc_sys_compare+0x27d/0x2c0 [ 81.522092][ T5856] ? __pfx_proc_sys_compare+0x10/0x10 [ 81.522109][ T5856] d_alloc_parallel+0x105d/0x15e0 [ 81.522135][ T5856] ? d_alloc_parallel+0x2f0/0x15e0 [ 81.522155][ T5856] ? __pfx_d_alloc_parallel+0x10/0x10 [ 81.522170][ T5856] ? __pfx_default_wake_function+0x10/0x10 [ 81.522195][ T5856] path_openat+0xa3b/0x3830 [ 81.522211][ T5856] ? arch_stack_walk+0xfc/0x150 [ 81.522254][ T5856] ? __pfx_path_openat+0x10/0x10 [ 81.522267][ T5856] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.522295][ T5856] do_filp_open+0x1fa/0x410 [ 81.522309][ T5856] ? __lock_acquire+0xab9/0xd20 [ 81.522324][ T5856] ? __pfx_do_filp_open+0x10/0x10 [ 81.522356][ T5856] ? _raw_spin_unlock+0x28/0x50 [ 81.522371][ T5856] ? alloc_fd+0x64c/0x6c0 [ 81.522392][ T5856] do_sys_openat2+0x121/0x1c0 [ 81.522410][ T5856] ? __pfx_do_sys_openat2+0x10/0x10 [ 81.522424][ T5856] ? exc_page_fault+0x76/0xf0 [ 81.522444][ T5856] ? do_user_addr_fault+0xc8a/0x1390 [ 81.522460][ T5856] __x64_sys_openat+0x138/0x170 [ 81.522479][ T5856] do_syscall_64+0xfa/0x3b0 [ 81.522495][ T5856] ? lockdep_hardirqs_on+0x9c/0x150 [ 81.522510][ T5856] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.522522][ T5856] ? clear_bhb_loop+0x60/0xb0 [ 81.522538][ T5856] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.522550][ T5856] RIP: 0033:0x7fba8298d211 [ 81.522567][ T5856] Code: 75 57 89 f0 25 00 00 41 00 3d 00 00 41 00 74 49 80 3d 3a 93 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 [ 81.522577][ T5856] RSP: 002b:00007fff359af480 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 [ 81.522591][ T5856] RAX: ffffffffffffffda RBX: 0000000000080001 RCX: 00007fba8298d211 [ 81.522600][ T5856] RDX: 0000000000080001 RSI: 00007fba82a2afc0 RDI: 00000000ffffff9c [ 81.522607][ T5856] RBP: 00007fba82a2afc0 R08: 0000000000000000 R09: 0000000000000000 [ 81.522615][ T5856] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008 [ 81.522622][ T5856] R13: 00007fff359af520 R14: 0000000000000009 R15: 0000000000000000 [ 81.522643][ T5856] [ 86.822387][ T24] cfg80211: failed to load regulatory.db