rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10499 ticks this GP) idle=1874/1/0x4000000000000000 softirq=21608/32731 fqs=5244 rcu: hardirqs softirqs csw/system rcu: number: 9250 10255 0 rcu: cputime: 193 1483 50789 ==> 52500(ms) rcu: (t=10502 jiffies g=16653 q=4954 ncpus=2) CPU: 1 UID: 0 PID: 6536 Comm: syz.2.94 Not tainted 6.16.0-rc4-syzkaller-00108-g17bbde2e1716 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194 Code: 74 05 e8 7b 64 65 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 f3 4d 2e f6 65 8b 05 cc 4a 37 07 85 c0 74 40 48 c7 04 24 0e 36 RSP: 0000:ffffc90000a08da0 EFLAGS: 00000206 RAX: caf8e33922c5dd00 RBX: 0000000000000a06 RCX: caf8e33922c5dd00 RDX: 0000000000000002 RSI: ffffffff8d96e99a RDI: 0000000000000001 RBP: ffffc90000a08e30 R08: ffffffff8f9fe0f7 R09: 1ffffffff1f3fc1e R10: dffffc0000000000 R11: fffffbfff1f3fc1f R12: dffffc0000000000 R13: 0000000000000009 R14: ffff8880b8727ac0 R15: 1ffff920001411b4 FS: 00007fb6d88226c0(0000) GS:ffff888125d84000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3d688b8000 CR3: 0000000028672000 CR4: 00000000003526f0 Call Trace: handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x18/0x70 kernel/kcov.c:217 Code: cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 c0 99 92 65 8b 15 88 72 d9 10 <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 RSP: 0000:ffffc9000bb86df8 EFLAGS: 00000246 RAX: ffffffff844264ef RBX: 1ffff1100900953e RCX: ffff88802b271e00 RDX: 0000000000000001 RSI: ffffffffffffffff RDI: 00000001a5eff98d RBP: 00000001a5eff98d R08: ffff88804804a9f7 R09: 1ffff1100900953e R10: dffffc0000000000 R11: ffffed100900953f R12: ffffffffffffffff R13: 0000000000000c98 R14: ffff88804804a690 R15: ffff888048049908 __bch2_next_write_buffer_flush_journal_buf+0x13f/0x360 fs/bcachefs/journal.c:1077 bch2_next_write_buffer_flush_journal_buf+0xc8/0x250 fs/bcachefs/journal.c:1107 fetch_wb_keys_from_journal fs/bcachefs/btree_write_buffer.c:533 [inline] btree_write_buffer_flush_seq+0x1ab/0x1a40 fs/bcachefs/btree_write_buffer.c:563 bch2_btree_write_buffer_flush_going_ro+0xdb/0x130 fs/bcachefs/btree_write_buffer.c:611 __bch2_fs_read_only+0x127/0x5b0 fs/bcachefs/super.c:290 __bch2_fs_read_write+0x518/0x590 fs/bcachefs/super.c:553 bch2_fs_read_write_early+0x26/0x40 fs/bcachefs/super.c:575 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:484 [inline] __bch2_run_recovery_passes+0x395/0x1010 fs/bcachefs/recovery_passes.c:539 bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:610 bch2_fs_recovery+0x2690/0x3a50 fs/bcachefs/recovery.c:1005 bch2_fs_start+0xa99/0xd90 fs/bcachefs/super.c:1212 bch2_fs_get_tree+0xafc/0x14f0 fs/bcachefs/fs.c:2490 vfs_get_tree+0x8f/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3902 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4427 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb6d79900ca Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb6d8821e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb6d8821ef0 RCX: 00007fb6d79900ca RDX: 00002000000000c0 RSI: 0000200000000000 RDI: 00007fb6d8821eb0 RBP: 00002000000000c0 R08: 00007fb6d8821ef0 R09: 0000000000810013 R10: 0000000000810013 R11: 0000000000000246 R12: 0000200000000000 R13: 00007fb6d8821eb0 R14: 000000000000592a R15: 0000200000000280