program: syz_mount_image$erofs(&(0x7f0000000040), &(0x7f0000000080)='./file2\x00', 0x0, &(0x7f0000000000)=ANY=[], 0x1, 0x1db, &(0x7f0000000380)="$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") r0 = socket$packet(0x11, 0x3, 0x300) setsockopt$packet_fanout(r0, 0x107, 0x12, &(0x7f0000000140)={0x1, 0x6}, 0x4) r1 = bpf$MAP_CREATE(0x0, &(0x7f0000000300)=ANY=[@ANYBLOB="0a0000000b00000002000000060000004200", @ANYRES32, @ANYRES32=0x0, @ANYRES32, @ANYBLOB='\x00\x00\x00\x00\x00\x00\x00'], 0x50) bpf$MAP_UPDATE_CONST_STR(0x2, &(0x7f0000000080)={{r1}, &(0x7f0000000000), &(0x7f0000000040)='%-010d \x00'}, 0x20) syz_mount_image$ext4(&(0x7f0000000140)='ext4\x00', &(0x7f0000000080)='./file0\x00', 0x0, &(0x7f0000000000), 0xfd, 0x4cb, &(0x7f0000000480)="$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") prlimit64(0x0, 0xe, &(0x7f0000000140)={0x8, 0x8b}, 0x0) sched_setscheduler(0x0, 0x2, &(0x7f0000000080)=0x8) r2 = getpid() sched_setscheduler(r2, 0x2, &(0x7f0000000200)=0x7) sched_setaffinity(0x0, 0x8, &(0x7f00000002c0)=0x2) mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0xb635773f06ebbeee, 0x8031, 0xffffffffffffffff, 0x6770c000) socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000200)={0xffffffffffffffff, 0xffffffffffffffff}) connect$unix(r3, &(0x7f000057eff8)=@abs, 0x6e) sendmmsg$unix(r4, &(0x7f0000000000), 0x651, 0x0) recvmmsg(r3, &(0x7f00000000c0), 0x10106, 0x2, 0x0) connect$pppl2tp(0xffffffffffffffff, 0x0, 0x0) bpf$PROG_LOAD(0x5, &(0x7f0000000c40)={0x6, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="180000000000000000000000fdffffde18000000", @ANYRES32, @ANYBLOB="0000000000000000b7080000000000007b8af8ff00000000bfa200000000000007020000f8ffffffb703000008000000b704000000000000850000004300000095"], 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback=0x2d, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94) r5 = bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x1f, 0xc, &(0x7f0000000440)=ANY=[], &(0x7f0000000240)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x1a, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x90) bpf$PROG_BIND_MAP(0xa, &(0x7f00000004c0)={r5}, 0xc) sched_setaffinity(0x0, 0x8, &(0x7f0000000240)=0x6) bpf$MAP_LOOKUP_ELEM(0x1, 0x0, 0x0) setsockopt$packet_fanout_data(r0, 0x107, 0x16, &(0x7f0000000100)={0x2, &(0x7f0000000180)=[{0x28, 0x0, 0xd, 0xfffff028}, {0x6, 0x0, 0x2, 0xffffffff}]}, 0x10) syz_clone3(&(0x7f0000000080)={0x2200, &(0x7f0000000040)=0xffffffffffffffff, 0x0, 0x0, {0xa}, 0x0, 0x0, 0x0, 0x0}, 0x58) pidfd_getfd(r6, r6, 0x0) r7 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x42, 0x0) r8 = ioctl$KVM_CREATE_VM(r7, 0xae01, 0x0) ioctl$KVM_X86_SET_MSR_FILTER(r8, 0x4188aec6, &(0x7f0000000380)={0x1, [{0x2, 0x0, 0x76, 0x0}, {0x1, 0x8, 0x4, &(0x7f00000001c0)="b5"}, {0x0, 0x0, 0x7f, 0x0}, {0x1, 0x0, 0x208, 0x0}, {0x2, 0x0, 0xffff6f56, 0x0}, {0x3, 0x0, 0x7, 0x0}, {0x0, 0x0, 0x0, 0x0}, {0x0, 0x0, 0x10000009, 0x0}, {0x2, 0x0, 0x3, 0x0}, {0x2, 0x0, 0x2ff, 0x0}, {0x1, 0x0, 0x4ed, 0x0}, {0x0, 0x0, 0x10, 0x0}, {0x0, 0x0, 0x9, 0x0}, {0x0, 0x0, 0x0, 0x0}, {0x0, 0x0, 0xb, 0x0}, {0x2, 0x0, 0x0, 0x0}]}) syz_kvm_setup_syzos_vm$x86(r8, &(0x7f0000b6b000/0x400000)=nil) [ 73.899169][ T5297] Bluetooth: hci0: command tx timeout [ 73.975058][ T5318] loop0: detected capacity change from 0 to 16 [ 74.003994][ T5318] erofs (device loop0): mounted with root inode @ nid 36. [ 74.375236][ T5320] [ 74.376802][ T5320] ============================= [ 74.379561][ T5320] WARNING: suspicious RCU usage [ 74.381887][ T5320] syzkaller #0 Not tainted [ 74.383812][ T5320] ----------------------------- [ 74.386079][ T5320] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 74.390195][ T5320] [ 74.390195][ T5320] other info that might help us debug this: [ 74.390195][ T5320] [ 74.395315][ T5320] [ 74.395315][ T5320] rcu_scheduler_active = 2, debug_locks = 1 [ 74.399413][ T5320] 1 lock held by syz.0.0/5320: [ 74.402057][ T5320] #0: ffffffff8e7604d8 (rcu_tasks_trace_srcu_struct){....}-{0:0}, at: rcu_read_lock_trace+0x25/0x110 [ 74.406950][ T5320] [ 74.406950][ T5320] stack backtrace: [ 74.409856][ T5320] CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 74.409883][ T5320] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 74.409893][ T5320] Call Trace: [ 74.409903][ T5320] [ 74.409914][ T5320] dump_stack_lvl+0xe8/0x150 [ 74.409945][ T5320] lockdep_rcu_suspicious+0x13f/0x1d0 [ 74.409976][ T5320] get_callchain_entry+0x2b6/0x3c0 [ 74.409999][ T5320] get_perf_callchain+0xd5/0x880 [ 74.410024][ T5320] ? __pfx_get_perf_callchain+0x10/0x10 [ 74.410046][ T5320] ? futex_unqueue+0x22/0x240 [ 74.410069][ T5320] ? futex_unqueue+0x22/0x240 [ 74.410085][ T5320] ? futex_unqueue+0x22/0x240 [ 74.410106][ T5320] __bpf_get_stack+0x445/0xab0 [ 74.410126][ T5320] ? __pfx___bpf_get_stack+0x10/0x10 [ 74.410149][ T5320] bpf_get_stack+0x33/0x50 [ 74.410168][ T5320] ? bpf_prog_42db8cfdf50901c9+0x46/0x4e [ 74.410184][ T5320] bpf_get_stack_raw_tp+0x1a9/0x220 [ 74.410207][ T5320] bpf_prog_42db8cfdf50901c9+0x46/0x4e [ 74.410222][ T5320] bpf_prog_run_pin_on_cpu+0x142/0x470 [ 74.410246][ T5320] bpf_prog_test_run_syscall+0x318/0x4c0 [ 74.410267][ T5320] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 74.410283][ T5320] ? __fget_files+0x2a/0x420 [ 74.410305][ T5320] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 74.410326][ T5320] bpf_prog_test_run+0x2c7/0x340 [ 74.410344][ T5320] __sys_bpf+0x643/0x950 [ 74.410367][ T5320] ? __pfx___sys_bpf+0x10/0x10 [ 74.410399][ T5320] ? rcu_is_watching+0x15/0xb0 [ 74.410428][ T5320] __x64_sys_bpf+0x7c/0x90 [ 74.410445][ T5320] do_syscall_64+0x14d/0xf80 [ 74.410466][ T5320] ? trace_irq_disable+0x3b/0x150 [ 74.410483][ T5320] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.410496][ T5320] ? clear_bhb_loop+0x40/0x90 [ 74.410510][ T5320] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.410525][ T5320] RIP: 0033:0x7f793839c799 [ 74.410540][ T5320] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48 [ 74.410551][ T5320] RSP: 002b:00007f79347d4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 74.410566][ T5320] RAX: ffffffffffffffda RBX: 00007f7938616180 RCX: 00007f793839c799 [ 74.410575][ T5320] RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a [ 74.410585][ T5320] RBP: 00007f7938432bd9 R08: 0000000000000000 R09: 0000000000000000 [ 74.410592][ T5320] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 74.410600][ T5320] R13: 00007f7938616218 R14: 00007f7938616180 R15: 00007fff05928028 [ 74.410619][ T5320]