rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=e384/1/0x4000000000000000 softirq=49472/49472 fqs=5242
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:    21585       6381            0
rcu: 	cputime:      516        807        51126   ==> 52490(ms)
rcu: 	(t=10501 jiffies g=41225 q=3901 ncpus=2)
CPU: 1 UID: 0 PID: 10428 Comm: syz.4.727 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:bch2_journal_space_available+0xf4f/0x1d90
Code: 89 ff be 08 00 00 00 e8 0f ac d7 fd 48 8b 44 24 38 42 80 3c 28 00 74 08 4c 89 ff e8 8b a9 d7 fd 49 3b 1f 77 2b e8 31 40 74 fd <48> ff c3 e9 1d ff ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 32
RSP: 0018:ffffc900034e6d80 EFLAGS: 00000293
RAX: ffffffff844b6bff RBX: 0000000193d9cdd9 RCX: ffff888020549cc0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88813314a9f0
RBP: ffffc900034e7178 R08: ffff88813314a9f7 R09: 1ffff1102662953e
R10: dffffc0000000000 R11: ffffed102662953f R12: 0000000000000100
R13: dffffc0000000000 R14: 0000000000000100 R15: ffff88813314a9f0
FS:  00007f969cf736c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560cbdd3d1b8 CR3: 000000012e9be000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __bch2_fs_read_write+0x35e/0x590
 bch2_fs_read_write_early+0x26/0x40
 __bch2_run_recovery_passes+0x3bd/0x1060
 bch2_run_recovery_passes+0x184/0x210
 bch2_fs_recovery+0x2690/0x3a50
 bch2_fs_start+0xaaf/0xda0
 bch2_fs_get_tree+0xb39/0x1520
 vfs_get_tree+0x92/0x2b0
 do_new_mount+0x2a2/0x9e0
 __se_sys_mount+0x317/0x410
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f969c19038a
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:00007f969cf72e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f969cf72ef0 RCX: 00007f969c19038a
RDX: 00002000000000c0 RSI: 0000200000000000 RDI: 00007f969cf72eb0
RBP: 00002000000000c0 R08: 00007f969cf72ef0 R09: 0000000000810000
R10: 0000000000810000 R11: 0000000000000246 R12: 0000200000000000
R13: 00007f969cf72eb0 R14: 0000000000005952 R15: 00002000000006c0
 </TASK>
