program: syz_mount_image$ext4(&(0x7f0000000780)='ext4\x00', &(0x7f0000000480)='./file1\x00', 0x0, &(0x7f0000000540), 0x1, 0x783, &(0x7f0000001000)="$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") r0 = bpf$MAP_CREATE(0x0, &(0x7f00000009c0)=ANY=[@ANYBLOB="1b00000000000000000000000080"], 0x48) bpf$PROG_LOAD(0x5, &(0x7f00000000c0)={0x0, 0xc, &(0x7f0000000440)=ANY=[@ANYBLOB="1800000000000000000000000000000018120000", @ANYRES32=r0, @ANYBLOB="0000000000000000b7080000000000007b8af8ff00000000bfa200000000000007020000f8ffffffb703000008000000b704000002010000850000004300000095"], 0x0, 0x400000, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x8, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x94) r1 = 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)={r1}, 0xc) r2 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x42, 0x0) pwrite64(r2, &(0x7f0000000140)='2', 0x1, 0x8000c61) r3 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0x42, 0x0) sendfile(r3, r3, 0x0, 0xe3aa6ea) creat(&(0x7f00000003c0)='./file1\x00', 0x11) seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x0, &(0x7f00000000c0)={0x1, &(0x7f0000000040)=[{0x6, 0x0, 0x0, 0x7fffffff}]}) [ 81.621720][ T5297] Bluetooth: hci0: command tx timeout [ 81.625079][ T1312] ieee802154 phy0 wpan0: encryption failed: -22 [ 81.637399][ T1312] ieee802154 phy1 wpan1: encryption failed: -22 [ 81.811532][ T5320] loop0: detected capacity change from 0 to 2048 [ 81.871336][ T5320] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. [ 81.901615][ T5320] [ 81.903004][ T5320] ============================= [ 81.906173][ T5320] WARNING: suspicious RCU usage [ 81.908805][ T5320] syzkaller #0 Not tainted [ 81.911029][ T5320] ----------------------------- [ 81.913187][ T5320] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 81.917109][ T5320] [ 81.917109][ T5320] other info that might help us debug this: [ 81.917109][ T5320] [ 81.921778][ T5320] [ 81.921778][ T5320] rcu_scheduler_active = 2, debug_locks = 1 [ 81.926122][ T5320] 1 lock held by syz.0.0/5320: [ 81.928159][ T5320] #0: ffffffff8df3d8c0 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 81.932444][ T5320] [ 81.932444][ T5320] stack backtrace: [ 81.934841][ T5320] CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 81.934860][ T5320] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 81.934867][ T5320] Call Trace: [ 81.934874][ T5320] [ 81.934882][ T5320] dump_stack_lvl+0x189/0x250 [ 81.934904][ T5320] ? __pfx_dump_stack_lvl+0x10/0x10 [ 81.934921][ T5320] ? __pfx__printk+0x10/0x10 [ 81.934940][ T5320] lockdep_rcu_suspicious+0x140/0x1d0 [ 81.934954][ T5320] get_callchain_entry+0x2b6/0x3c0 [ 81.934972][ T5320] get_perf_callchain+0xb3/0x6f0 [ 81.934987][ T5320] ? __pfx___schedule+0x10/0x10 [ 81.935006][ T5320] ? __pfx_get_perf_callchain+0x10/0x10 [ 81.935028][ T5320] __bpf_get_stack+0x3fa/0xa60 [ 81.935044][ T5320] ? __pfx___bpf_get_stack+0x10/0x10 [ 81.935053][ T5320] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 81.935074][ T5320] bpf_get_stack+0x33/0x50 [ 81.935089][ T5320] ? bpf_prog_e8e6327ccf46c9a7+0x46/0x4e [ 81.935099][ T5320] bpf_get_stack_raw_tp+0x1a9/0x220 [ 81.935116][ T5320] bpf_prog_e8e6327ccf46c9a7+0x46/0x4e [ 81.935125][ T5320] bpf_prog_run_pin_on_cpu+0x143/0x470 [ 81.935149][ T5320] bpf_prog_test_run_syscall+0x312/0x4b0 [ 81.935166][ T5320] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 81.935180][ T5320] ? __fget_files+0x2a/0x420 [ 81.935198][ T5320] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 81.935213][ T5320] bpf_prog_test_run+0x2c7/0x340 [ 81.935228][ T5320] __sys_bpf+0x562/0x860 [ 81.935240][ T5320] ? __pfx___sys_bpf+0x10/0x10 [ 81.935249][ T5320] ? rcu_is_watching+0x15/0xb0 [ 81.935273][ T5320] ? rcu_is_watching+0x15/0xb0 [ 81.935291][ T5320] __x64_sys_bpf+0x7c/0x90 [ 81.935308][ T5320] do_syscall_64+0xfa/0xfa0 [ 81.935324][ T5320] ? lockdep_hardirqs_on+0x9c/0x150 [ 81.935340][ T5320] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.935353][ T5320] ? clear_bhb_loop+0x60/0xb0 [ 81.935367][ T5320] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.935377][ T5320] RIP: 0033:0x7fa2c098f6c9 [ 81.935389][ T5320] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 [ 81.935398][ T5320] RSP: 002b:00007fa2c18b3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 81.935412][ T5320] RAX: ffffffffffffffda RBX: 00007fa2c0be5fa0 RCX: 00007fa2c098f6c9 [ 81.935420][ T5320] RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a [ 81.935428][ T5320] RBP: 00007fa2c0a11f91 R08: 0000000000000000 R09: 0000000000000000 [ 81.935435][ T5320] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 81.935442][ T5320] R13: 00007fa2c0be6038 R14: 00007fa2c0be5fa0 R15: 00007ffc45ce8968 [ 81.935486][ T5320]