BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 3924 Comm: syz-executor.2 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:3063 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3162 [inline]
 validate_chain kernel/locking/lockdep.c:3183 [inline]
 __lock_acquire.cold+0x11/0x3f8 kernel/locking/lockdep.c:4380
 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:353 [inline]
 fsync_buffers_list fs/buffer.c:710 [inline]
 sync_mapping_buffers+0x139/0xb40 fs/buffer.c:549
 fat_file_fsync+0x137/0x200 fs/fat/file.c:194
 vfs_fsync_range+0x13a/0x220 fs/sync.c:200
 generic_write_sync include/linux/fs.h:2882 [inline]
 generic_file_write_iter+0x467/0x5c0 mm/filemap.c:3483
 call_write_iter include/linux/fs.h:1908 [inline]
 do_iter_readv_writev+0x567/0x780 fs/read_write.c:713
 do_iter_write+0x188/0x5f0 fs/read_write.c:1018
 vfs_writev+0x1aa/0x2e0 fs/read_write.c:1091
 do_writev+0x139/0x300 fs/read_write.c:1134
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c1d9
Code: Bad RIP value.
RSP: 002b:00007fe2fdcb4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 0000000000037880 RCX: 000000000045c1d9
RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffe8bd62d5f R14: 00007fe2fdcb59c0 R15: 000000000078bf0c