===================================== WARNING: bad unlock balance detected! 6.11.0-rc1-syzkaller-00062-ge4fc196f5ba3 #0 Not tainted ------------------------------------- syz-executor261/5253 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: 1 lock held by syz-executor261/5253: #0: ffff88802c068420 (sb_writers#9){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline] #0: ffff88802c068420 (sb_writers#9){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586 stack backtrace: CPU: 1 UID: 0 PID: 5253 Comm: syz-executor261 Not tainted 6.11.0-rc1-syzkaller-00062-ge4fc196f5ba3 #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+0xa72/0xc90 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: 0033:0x7f910d830169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcc3dc0128 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0073746e6576652e RCX: 00007f910d830169 RDX: 0000000000182000 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 652e79726f6d656d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcc3dc0170 R13: 00007ffcc3dc01b0 R14: 0000000001000000 R15: 0000000000000003 ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88807979b868, owner = 0x0, curr 0xffff88802b3d1e00, list empty WARNING: CPU: 0 PID: 5253 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline] WARNING: CPU: 0 PID: 5253 at kernel/locking/rwsem.c:1370 up_write+0x502/0x590 kernel/locking/rwsem.c:1632 Modules linked in: CPU: 0 UID: 0 PID: 5253 Comm: syz-executor261 Not tainted 6.11.0-rc1-syzkaller-00062-ge4fc196f5ba3 #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 ea 8b 48 c7 c6 20 cb ea 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 d3 9c e6 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6a fd ff ff 48 c7 c1 00 a9 f6 8f 80 e1 07 80 c1 03 RSP: 0018:ffffc900033ef920 EFLAGS: 00010292 RAX: f014ffd380154b00 RBX: ffffffff8beac980 RCX: ffff88802b3d1e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900033ef9f0 R08: ffffffff81559202 R09: fffffbfff1cb9f80 R10: dffffc0000000000 R11: fffffbfff1cb9f80 R12: 0000000000000000 R13: ffff88807979b868 R14: 1ffff9200067df2c R15: dffffc0000000000 FS: 000055555852a380(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005586a06290f8 CR3: 0000000024b46000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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+0xa72/0xc90 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: 0033:0x7f910d830169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcc3dc0128 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0073746e6576652e RCX: 00007f910d830169 RDX: 0000000000182000 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 652e79726f6d656d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcc3dc0170 R13: 00007ffcc3dc01b0 R14: 0000000001000000 R15: 0000000000000003