syzbot

bcachefs (loop2): going read-write
bcachefs (loop2): marking 
bcachefs (loop2): marking superblocks
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7109 at kernel/rcu/srcutree.c:1325 __srcu_read_unlock kernel/rcu/srcutree.c:-1 [inline]
WARNING: CPU: 0 PID: 7109 at kernel/rcu/srcutree.c:1325 __srcu_read_unlock_nmisafe include/linux/srcu.h:119 [inline]
WARNING: CPU: 0 PID: 7109 at kernel/rcu/srcutree.c:1325 srcu_gp_start_if_needed+0xeac/0x10d0 kernel/rcu/srcutree.c:1347
Modules linked in:
CPU: 0 UID: 0 PID: 7109 Comm: syz.2.84 Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : srcu_gp_start_if_needed+0xeac/0x10d0 kernel/rcu/srcutree.c:-1
lr : srcu_gp_start_if_needed+0x574/0x10d0 kernel/rcu/srcutree.c:1325
sp : ffff80009b646250
x29: ffff80009b6462e0 x28: fffffdffbf7750c0 x27: 00000000000000c0
x26: dfff800000000000 x25: fffffffffffffe77 x24: ffff0000ed1d5b88
x23: ffff0000c8961980 x22: 0000000000000000 x21: fffffffffffffe74
x20: ffff0000f9784250 x19: fffffdffbf775080 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80008adb421c x15: ffff7000136c8c34
x14: 1ffff000136c8c34 x13: 0000000000000004 x12: ffffffffffffffff
x11: 0000000087094fda x10: 0000000000000003 x9 : 0000000000000000
x8 : 0000000000000000 x7 : ffff80008059d5f8 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008ae837c0
x2 : 0000000000000008 x1 : fffffffffffffe74 x0 : 0000000000000000
Call trace:
 __srcu_read_unlock kernel/rcu/srcutree.c:-1 [inline] (P)
 __srcu_read_unlock_nmisafe include/linux/srcu.h:119 [inline] (P)
 srcu_gp_start_if_needed+0xeac/0x10d0 kernel/rcu/srcutree.c:1347 (P)
 __call_srcu kernel/rcu/srcutree.c:1389 [inline]
 call_srcu+0xc8/0xe0 kernel/rcu/srcutree.c:1416
 __call_rcu+0x38/0x60 fs/bcachefs/rcu_pending.c:76
 __rcu_pending_enqueue fs/bcachefs/rcu_pending.c:497 [inline]
 rcu_pending_enqueue+0x70c/0x840 fs/bcachefs/rcu_pending.c:531
 bkey_cached_free+0xb8/0x1c4 fs/bcachefs/btree_key_cache.c:115
 bch2_btree_key_cache_drop+0x10c/0x5c8 fs/bcachefs/btree_key_cache.c:619
 bch2_trans_commit_write_locked fs/bcachefs/btree_trans_commit.c:772 [inline]
 do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:844 [inline]
 __bch2_trans_commit+0x4ac8/0x62d0 fs/bcachefs/btree_trans_commit.c:1050
 bch2_trans_commit fs/bcachefs/btree_update.h:195 [inline]
 bch2_trans_mark_metadata_bucket+0x328/0xe14 fs/bcachefs/buckets.c:1052
 bch2_trans_mark_metadata_sectors fs/bcachefs/buckets.c:1069 [inline]
 __bch2_trans_mark_dev_sb fs/bcachefs/buckets.c:1109 [inline]
 bch2_trans_mark_dev_sb+0x318/0x67c fs/bcachefs/buckets.c:1137
 bch2_trans_mark_dev_sbs_flags+0x6f4/0x754 fs/bcachefs/buckets.c:1147
 bch2_trans_mark_dev_sbs+0x24/0x34 fs/bcachefs/buckets.c:1159
 bch2_fs_initialize+0x8cc/0x10ac fs/bcachefs/recovery.c:1153
 bch2_fs_start+0x5a0/0x908 fs/bcachefs/super.c:1092
 bch2_fs_get_tree+0xa0c/0xf30 fs/bcachefs/fs.c:2570
 vfs_get_tree+0x90/0x28c fs/super.c:1759
 do_new_mount+0x228/0x814 fs/namespace.c:3884
 path_mount+0x5b4/0xde0 fs/namespace.c:4211
 do_mount fs/namespace.c:4224 [inline]
 __do_sys_mount fs/namespace.c:4435 [inline]
 __se_sys_mount fs/namespace.c:4412 [inline]
 __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4412
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
irq event stamp: 71278
hardirqs last  enabled at (71277): [<ffff800080c25df0>] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234
hardirqs last disabled at (71278): [<ffff8000829dbf38>] __rcu_pending_enqueue fs/bcachefs/rcu_pending.c:432 [inline]
hardirqs last disabled at (71278): [<ffff8000829dbf38>] rcu_pending_enqueue+0xc8/0x840 fs/bcachefs/rcu_pending.c:531
softirqs last  enabled at (71066): [<ffff8000803cbf1c>] softirq_handle_end kernel/softirq.c:425 [inline]
softirqs last  enabled at (71066): [<ffff8000803cbf1c>] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607
softirqs last disabled at (70993): [<ffff800080020efc>] __do_softirq+0x14/0x20 kernel/softirq.c:613
---[ end trace 0000000000000000 ]---
bcachefs (loop2): initializing freespace
bcachefs (loop2): done initializing freespace
bcachefs (loop2): reading snapshots table
bcachefs (loop2): reading snapshots done
bcachefs (loop2): done starting filesystem