===================================== WARNING: bad unlock balance detected! 6.11.0-rc2-syzkaller-00013-gd4560686726f #0 Not tainted ------------------------------------- syz.4.1692/12078 is trying to release lock (&sb->s_type->i_mutex_key) at: [] btrfs_direct_write+0x91f/0xb40 fs/btrfs/direct-io.c:920 but there are no more locks to release! other info that might help us debug this: 2 locks held by syz.4.1692/12078: #0: ffff8880210b4d48 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x310 fs/file.c:1191 #1: ffff888057324420 (sb_writers#26){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline] #1: ffff888057324420 (sb_writers#26){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586 stack backtrace: CPU: 0 UID: 0 PID: 12078 Comm: syz.4.1692 Not tainted 6.11.0-rc2-syzkaller-00013-gd4560686726f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_unlock_imbalance_bug+0x256/0x2c0 kernel/locking/lockdep.c:5199 __lock_release kernel/locking/lockdep.c:5436 [inline] lock_release+0x5cb/0xa30 kernel/locking/lockdep.c:5780 up_write+0x79/0x590 kernel/locking/rwsem.c:1631 btrfs_direct_write+0x91f/0xb40 fs/btrfs/direct-io.c:920 btrfs_do_write_iter+0x2a1/0x760 fs/btrfs/file.c:1505 new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa74/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd4b81779f9 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 RSP: 002b:00007fd4b7bde038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fd4b8306058 RCX: 00007fd4b81779f9 RDX: 000000000006e000 RSI: 0000000020000000 RDI: 0000000000000006 RBP: 00007fd4b81e58ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd4b8306058 R15: 00007ffc173b32d8 ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88805a6b2fc0, owner = 0x0, curr 0xffff8880233c0000, list empty WARNING: CPU: 1 PID: 12078 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline] WARNING: CPU: 1 PID: 12078 at kernel/locking/rwsem.c:1370 up_write+0x502/0x590 kernel/locking/rwsem.c:1632 Modules linked in: CPU: 1 UID: 0 PID: 12078 Comm: syz.4.1692 Not tainted 6.11.0-rc2-syzkaller-00013-gd4560686726f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline] RIP: 0010:up_write+0x502/0x590 kernel/locking/rwsem.c:1632 Code: c7 c7 a0 c8 0a 8c 48 c7 c6 20 cb 0a 8c 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 83 9c e6 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6a fd ff ff 48 c7 c1 d0 f1 17 90 80 e1 07 80 c1 03 RSP: 0018:ffffc90002ecf920 EFLAGS: 00010292 RAX: ea272273dd7ffa00 RBX: ffffffff8c0ac980 RCX: 0000000000040000 RDX: ffffc9001199c000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc90002ecf9f0 R08: ffffffff8155a2d2 R09: fffffbfff1cfa0d8 R10: dffffc0000000000 R11: fffffbfff1cfa0d8 R12: 0000000000000000 R13: ffff88805a6b2fc0 R14: 1ffff920005d9f2c R15: dffffc0000000000 FS: 00007fd4b7bde6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3070cff8 CR3: 000000005048a000 CR4: 0000000000350ef0 Call Trace: btrfs_direct_write+0x91f/0xb40 fs/btrfs/direct-io.c:920 btrfs_do_write_iter+0x2a1/0x760 fs/btrfs/file.c:1505 new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa74/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd4b81779f9 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 RSP: 002b:00007fd4b7bde038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fd4b8306058 RCX: 00007fd4b81779f9 RDX: 000000000006e000 RSI: 0000000020000000 RDI: 0000000000000006 RBP: 00007fd4b81e58ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd4b8306058 R15: 00007ffc173b32d8