last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.238' (ED25519) to the list of known hosts. [ 84.858858][ T5824] cgroup: Unknown subsys name 'net' [ 85.018257][ T5824] cgroup: Unknown subsys name 'cpuset' [ 85.027675][ T5824] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 86.669577][ T5824] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 92.033460][ T3082] cfg80211: failed to load regulatory.db [ 95.244840][ T5842] [ 95.247567][ T5842] ============================= [ 95.252620][ T5842] WARNING: suspicious RCU usage [ 95.257512][ T5842] 6.16.0-rc4-next-20250703-syzkaller #0 Not tainted [ 95.264285][ T5842] ----------------------------- [ 95.269156][ T5842] fs/proc/proc_sysctl.c:934 suspicious rcu_dereference_check() usage! [ 95.277500][ T5842] [ 95.277500][ T5842] other info that might help us debug this: [ 95.277500][ T5842] [ 95.287780][ T5842] [ 95.287780][ T5842] rcu_scheduler_active = 2, debug_locks = 1 [ 95.295870][ T5842] 3 locks held by syz-executor/5842: [ 95.301293][ T5842] #0: ffff888030424428 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 95.310570][ T5842] #1: ffff8880232d6c10 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: path_openat+0x8cb/0x3830 [ 95.321249][ T5842] #2: ffff8880780cc9a0 (&lockref->lock){+.+.}-{3:3}, at: d_alloc_parallel+0xbe4/0x15e0 [ 95.331174][ T5842] [ 95.331174][ T5842] stack backtrace: [ 95.337117][ T5842] CPU: 1 UID: 0 PID: 5842 Comm: syz-executor Not tainted 6.16.0-rc4-next-20250703-syzkaller #0 PREEMPT(full) [ 95.337136][ T5842] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 95.337151][ T5842] Call Trace: [ 95.337157][ T5842] [ 95.337163][ T5842] dump_stack_lvl+0x189/0x250 [ 95.337185][ T5842] ? __pfx_dump_stack_lvl+0x10/0x10 [ 95.337202][ T5842] ? __pfx__printk+0x10/0x10 [ 95.337229][ T5842] lockdep_rcu_suspicious+0x140/0x1d0 [ 95.337247][ T5842] proc_sys_compare+0x27d/0x2c0 [ 95.337262][ T5842] ? __pfx_proc_sys_compare+0x10/0x10 [ 95.337279][ T5842] d_alloc_parallel+0x105d/0x15e0 [ 95.337301][ T5842] ? d_alloc_parallel+0x2f0/0x15e0 [ 95.337321][ T5842] ? __pfx_d_alloc_parallel+0x10/0x10 [ 95.337335][ T5842] ? __pfx_default_wake_function+0x10/0x10 [ 95.337367][ T5842] path_openat+0xa3b/0x3830 [ 95.337381][ T5842] ? arch_stack_walk+0xfc/0x150 [ 95.337423][ T5842] ? __pfx_path_openat+0x10/0x10 [ 95.337436][ T5842] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 95.337466][ T5842] do_filp_open+0x1fa/0x410 [ 95.337479][ T5842] ? __lock_acquire+0xab9/0xd20 [ 95.337501][ T5842] ? __pfx_do_filp_open+0x10/0x10 [ 95.337533][ T5842] ? _raw_spin_unlock+0x28/0x50 [ 95.337549][ T5842] ? alloc_fd+0x64c/0x6c0 [ 95.337576][ T5842] do_sys_openat2+0x121/0x1c0 [ 95.337601][ T5842] ? __pfx_do_sys_openat2+0x10/0x10 [ 95.337621][ T5842] ? fput_close_sync+0x119/0x200 [ 95.337650][ T5842] ? __pfx_fput_close_sync+0x10/0x10 [ 95.337678][ T5842] __x64_sys_openat+0x138/0x170 [ 95.337695][ T5842] do_syscall_64+0xfa/0x3b0 [ 95.337713][ T5842] ? lockdep_hardirqs_on+0x9c/0x150 [ 95.337731][ T5842] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 95.337745][ T5842] ? clear_bhb_loop+0x60/0xb0 [ 95.337762][ T5842] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 95.337776][ T5842] RIP: 0033:0x7f9dfaf8d211 [ 95.337793][ T5842] 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 [ 95.337805][ T5842] RSP: 002b:00007ffc6d71f190 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 [ 95.337819][ T5842] RAX: ffffffffffffffda RBX: 0000000000080001 RCX: 00007f9dfaf8d211 [ 95.337829][ T5842] RDX: 0000000000080001 RSI: 00007f9dfb02ae4d RDI: 00000000ffffff9c [ 95.337839][ T5842] RBP: 00007f9dfb02ae4d R08: 0000000000000000 R09: 0000000000000000 [ 95.337847][ T5842] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004 [ 95.337856][ T5842] R13: 00007ffc6d71f230 R14: 0000000000000009 R15: 0000000000000000 [ 95.337877][ T5842] SYZFAIL: failed to recv rpc fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor)