Warning: Permanently added '10.128.1.10' (ED25519) to the list of known hosts. executing program syzkaller login: [ 60.934342][ T4167] [ 60.936849][ T4167] ============================= [ 60.942196][ T4167] WARNING: suspicious RCU usage [ 60.947135][ T4167] 5.15.182-syzkaller #0 Not tainted [ 60.952453][ T4167] ----------------------------- [ 60.957331][ T4167] kernel/events/callchain.c:161 suspicious rcu_dereference_check() usage! [ 60.966132][ T4167] [ 60.966132][ T4167] other info that might help us debug this: [ 60.966132][ T4167] [ 60.976656][ T4167] [ 60.976656][ T4167] rcu_scheduler_active = 2, debug_locks = 1 [ 60.984975][ T4167] 1 lock held by syz-executor234/4167: [ 60.990605][ T4167] #0: ffffffff8c11c020 (rcu_read_lock_trace){....}-{0:0}, at: rcu_lock_acquire+0x9/0x30 [ 61.000576][ T4167] [ 61.000576][ T4167] stack backtrace: [ 61.006612][ T4167] CPU: 1 PID: 4167 Comm: syz-executor234 Not tainted 5.15.182-syzkaller #0 [ 61.015295][ T4167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 61.025377][ T4167] Call Trace: [ 61.028684][ T4167] [ 61.031610][ T4167] dump_stack_lvl+0x168/0x230 [ 61.036306][ T4167] ? load_image+0x3b0/0x3b0 [ 61.040852][ T4167] ? show_regs_print_info+0x20/0x20 [ 61.046079][ T4167] ? lockdep_rcu_suspicious+0x110/0x180 [ 61.051621][ T4167] get_callchain_entry+0x2a5/0x3b0 [ 61.056759][ T4167] get_perf_callchain+0x9f/0x480 [ 61.061694][ T4167] ? put_callchain_entry+0xb0/0xb0 [ 61.066816][ T4167] ? __lock_acquire+0x12d9/0x7c60 [ 61.071859][ T4167] ? mark_lock+0x94/0x320 [ 61.076197][ T4167] ? verify_lock_unused+0x140/0x140 [ 61.081424][ T4167] ? __lock_acquire+0x13ad/0x7c60 [ 61.086450][ T4167] __bpf_get_stack+0x2cb/0x4f0 [ 61.091219][ T4167] ? stack_map_get_build_id_offset+0x860/0x860 [ 61.097372][ T4167] ? __cant_sleep+0x210/0x210 [ 61.102039][ T4167] ? bpf_prog_b8a90dd1efcc4ad9+0x3d/0x60c [ 61.107845][ T4167] bpf_get_stack_raw_tp+0x175/0x1d0 [ 61.113043][ T4167] bpf_prog_b8a90dd1efcc4ad9+0x3d/0x60c [ 61.118579][ T4167] bpf_prog_run_pin_on_cpu+0x63/0x140 [ 61.123969][ T4167] bpf_prog_test_run_syscall+0x354/0x4e0 [ 61.129610][ T4167] ? sock_gen_cookie+0x60/0x60 [ 61.134375][ T4167] ? __fdget+0x150/0x210 [ 61.138798][ T4167] ? sock_gen_cookie+0x60/0x60 [ 61.143566][ T4167] bpf_prog_test_run+0x31e/0x390 [ 61.148534][ T4167] __sys_bpf+0x535/0x670 [ 61.152814][ T4167] ? bpf_link_show_fdinfo+0x310/0x310 [ 61.158197][ T4167] ? vtime_user_exit+0x2dc/0x400 [ 61.163272][ T4167] __x64_sys_bpf+0x78/0x90 [ 61.167720][ T4167] do_syscall_64+0x4c/0xa0 [ 61.172159][ T4167] ? clear_bhb_loop+0x15/0x70 [ 61.176842][ T4167] ? clear_bhb_loop+0x15/0x70 [ 61.181539][ T4167] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 61.187633][ T4167] RIP: 0033:0x7f95f172c629 [ 61.192147][ T4167] Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 61.211895][ T4167] RSP: 002b:00007ffe2da2f3c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 61.220861][ T4167] RAX: ffffffffffffffda RBX: 0000200000000440 RCX: 00007f95f172c629 [ 61.229060][ T4167] RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a [ 61.237078][ T4167] RBP: 00002000000000c0 R08: 0000000000000000 R09: 0000000000000000 [ 61.245060][ T4167] R10: 000020000000010c R11: 0000000000000246 R12: 00002000000000f0 [ 61.253031][ T4167] R13: 00002000000000c8 R14: 0000000000000001 R15: 00002000000000c4 [ 61.261014][ T4167] [ 61.264184][ T4167] [ 61.266525][ T4167] ============================= [ 61.271484][ T4167] WARNING: suspicious RCU usage [ 61.276328][ T4167] 5.15.182-syzkaller #0 Not tainted [ 61.281785][ T4167] ----------------------------- [ 61.286646][ T4167] include/linux/perf_event.h:1274 suspicious rcu_dereference_check() usage! [ 61.295824][ T4167] [ 61.295824][ T4167] other info that might help us debug this: [ 61.295824][ T4167] [ 61.306594][ T4167] [ 61.306594][ T4167] rcu_scheduler_active = 2, debug_locks = 1 [ 61.314971][ T4167] 1 lock held by syz-executor234/4167: [ 61.320508][ T4167] #0: ffffffff8c11c020 (rcu_read_lock_trace){....}-{0:0}, at: rcu_lock_acquire+0x9/0x30 [ 61.330762][ T4167] [ 61.330762][ T4167] stack backtrace: [ 61.336673][ T4167] CPU: 1 PID: 4167 Comm: syz-executor234 Not tainted 5.15.182-syzkaller #0 [ 61.345366][ T4167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 61.355502][ T4167] Call Trace: [ 61.358810][ T4167] [ 61.361735][ T4167] dump_stack_lvl+0x168/0x230 [ 61.366410][ T4167] ? show_regs_print_info+0x20/0x20 [ 61.371692][ T4167] ? lockdep_rcu_suspicious+0x110/0x180 [ 61.377245][ T4167] perf_callchain_user+0x6d3/0x10e0 [ 61.382492][ T4167] ? get_callchain_entry+0x181/0x3b0 [ 61.387794][ T4167] get_perf_callchain+0x35d/0x480 [ 61.392921][ T4167] ? put_callchain_entry+0xb0/0xb0 [ 61.398329][ T4167] ? __lock_acquire+0x12d9/0x7c60 [ 61.403362][ T4167] ? mark_lock+0x94/0x320 [ 61.407688][ T4167] ? verify_lock_unused+0x140/0x140 [ 61.412882][ T4167] ? __lock_acquire+0x13ad/0x7c60 [ 61.417904][ T4167] __bpf_get_stack+0x2cb/0x4f0 [ 61.422671][ T4167] ? stack_map_get_build_id_offset+0x860/0x860 [ 61.428822][ T4167] ? __cant_sleep+0x210/0x210 [ 61.433492][ T4167] ? bpf_prog_b8a90dd1efcc4ad9+0x3d/0x60c [ 61.439322][ T4167] bpf_get_stack_raw_tp+0x175/0x1d0 [ 61.444543][ T4167] bpf_prog_b8a90dd1efcc4ad9+0x3d/0x60c [ 61.450096][ T4167] bpf_prog_run_pin_on_cpu+0x63/0x140 [ 61.455583][ T4167] bpf_prog_test_run_syscall+0x354/0x4e0 [ 61.461417][ T4167] ? sock_gen_cookie+0x60/0x60 [ 61.466196][ T4167] ? __fdget+0x150/0x210 [ 61.470445][ T4167] ? sock_gen_cookie+0x60/0x60 [ 61.475217][ T4167] bpf_prog_test_run+0x31e/0x390 [ 61.480190][ T4167] __sys_bpf+0x535/0x670 [ 61.484438][ T4167] ? bpf_link_show_fdinfo+0x310/0x310 [ 61.489811][ T4167] ? vtime_user_exit+0x2dc/0x400 [ 61.494766][ T4167] __x64_sys_bpf+0x78/0x90 [ 61.499440][ T4167] do_syscall_64+0x4c/0xa0 [ 61.503862][ T4167] ? clear_bhb_loop+0x15/0x70 [ 61.508550][ T4167] ? clear_bhb_loop+0x15/0x70 [ 61.513252][ T4167] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 61.519147][ T4167] RIP: 0033:0x7f95f172c629 [ 61.523571][ T4167] Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 61.543399][ T4167] RSP: 002b:00007ffe2da2f3c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 61.551952][ T4167] RAX: ffffffffffffffda RBX: 0000200000000440 RCX: 00007f95f172c629 [ 61.560023][ T4167] RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a [ 61.568083][ T4167] RBP: 00002000000000c0 R08: 0000000000000000 R09: 0000000000000000 [ 61.576064][ T4167] R10: 000020000000010c R11: 0000000000000246 R12: 00002000000000f0 [ 61.584064][ T4167] R13: 00002000000000c