ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. (syz.0.15,6544,0):ocfs2_read_blocks:240 ERROR: status = -12 ===================================== WARNING: bad unlock balance detected! 6.11.0-syzkaller-g98f7e32f20d2 #0 Not tainted ------------------------------------- syz.0.15/6544 is trying to release lock (&oi->ip_io_mutex) at: [] ocfs2_inode_cache_io_unlock+0x20/0x30 fs/ocfs2/inode.c:1650 but there are no more locks to release! other info that might help us debug this: 8 locks held by syz.0.15/6544: #0: ffff0000d60a0420 (sb_writers#11){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:515 #1: ffff0000e0bc09c0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:835 [inline] #1: ffff0000e0bc09c0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: filename_create+0x204/0x468 fs/namei.c:3979 #2: ffff0000d9ef2640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:800 [inline] #2: ffff0000d9ef2640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x164/0x4288 fs/ocfs2/suballoc.c:786 #3: ffff0000d9ef1800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:800 [inline] #3: ffff0000d9ef1800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x164/0x4288 fs/ocfs2/suballoc.c:786 #4: ffff0000d9ef42c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:800 [inline] #4: ffff0000d9ef42c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_reserve_local_alloc_bits+0xfc/0x247c fs/ocfs2/localalloc.c:636 #5: ffff0000d60a0610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_mknod+0xe58/0x243c fs/ocfs2/namei.c:359 #6: ffff0000d67754e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3c4/0x71c fs/ocfs2/journal.c:350 #7: ffff0000c521a958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf0c/0x11c4 fs/jbd2/transaction.c:446 stack backtrace: CPU: 0 UID: 0 PID: 6544 Comm: syz.0.15 Not tainted 6.11.0-syzkaller-g98f7e32f20d2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:319 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:326 __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:119 dump_stack+0x1c/0x28 lib/dump_stack.c:128 print_unlock_imbalance_bug+0x250/0x2a4 kernel/locking/lockdep.c:5199 __lock_release kernel/locking/lockdep.c:5436 [inline] lock_release+0x4ec/0x9e8 kernel/locking/lockdep.c:5780 __mutex_unlock_slowpath+0xe0/0x6b4 kernel/locking/mutex.c:912 mutex_unlock+0x18/0x24 kernel/locking/mutex.c:548 ocfs2_inode_cache_io_unlock+0x20/0x30 fs/ocfs2/inode.c:1650 ocfs2_metadata_cache_io_unlock+0x6c/0x90 fs/ocfs2/uptodate.c:95 ocfs2_read_blocks+0x1164/0x1638 fs/ocfs2/buffer_head_io.c:394 ocfs2_read_block fs/ocfs2/buffer_head_io.h:52 [inline] ocfs2_read_group_descriptor fs/ocfs2/suballoc.c:303 [inline] ocfs2_search_chain+0x278/0x2214 fs/ocfs2/suballoc.c:1810 ocfs2_claim_suballoc_bits+0x9ac/0x1e20 fs/ocfs2/suballoc.c:1985 ocfs2_claim_new_inode+0x2dc/0x7a8 fs/ocfs2/suballoc.c:2267 ocfs2_mknod_locked+0x134/0x2e4 fs/ocfs2/namei.c:633 ocfs2_mknod+0x10a0/0x243c fs/ocfs2/namei.c:379 vfs_mknod+0x330/0x360 fs/namei.c:4088 do_mknodat+0x42c/0x564 __do_sys_mknodat fs/namei.c:4166 [inline] __se_sys_mknodat fs/namei.c:4163 [inline] __arm64_sys_mknodat+0xac/0xc8 fs/namei.c:4163 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 (syz.0.15,6544,0):ocfs2_search_chain:1814 ERROR: status = -12 (syz.0.15,6544,0):ocfs2_search_chain:1926 ERROR: status = -12 (syz.0.15,6544,0):ocfs2_claim_suballoc_bits:1995 ERROR: status = -12 (syz.0.15,6544,0):ocfs2_claim_suballoc_bits:2038 ERROR: status = -12 (syz.0.15,6544,0):ocfs2_claim_new_inode:2273 ERROR: status = -12 (syz.0.15,6544,0):ocfs2_claim_new_inode:2288 ERROR: status = -12 (syz.0.15,6544,0):ocfs2_mknod_locked:637 ERROR: status = -12 (syz.0.15,6544,0):ocfs2_mknod:383 ERROR: status = -12 (syz.0.15,6544,0):ocfs2_mknod:500 ERROR: status = -12