===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.4/3957 is trying to release lock (rcu_read_lock) at: [] __wait_on_freeing_inode+0x105/0x350 but there are no more locks to release! other info that might help us debug this: 4 locks held by syz-executor.4/3957: #0: ffff88800f8943f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888039045020 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f8a0950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe32/0x12d0 #3: ffffffff85c16898 (inode_hash_lock){+.+.}-{3:3}, at: insert_inode_locked+0xf9/0x890 stack backtrace: CPU: 0 UID: 0 PID: 3957 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260115 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xca/0x120 print_unlock_imbalance_bug+0x118/0x130 lock_release+0x1ee/0x270 __wait_on_freeing_inode+0x10a/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2088d2ec27 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f20862a4fa8 EFLAGS: 00000213 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f2088d2ec27 RDX: 0000000000000004 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007f20862a5040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000213 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f20862a5000 R15: 0000000020014100 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.4/3957 Modules linked in: CPU: 0 UID: 0 PID: 3957 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260115 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__rcu_read_unlock+0x25f/0x5c0 Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 d6 b7 de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 8a 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 81 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff88801eb179e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888018f45280 RCX: ffffc900027ed000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888018f4567c RBP: ffff888018f45280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888018f45280 R13: 0000000000000001 R14: ffffffff85c0c2a0 R15: ffff888039006bf0 FS: 00007f20862a5700(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ce25000 CR3: 000000000c674000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2088d2ec27 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f20862a4fa8 EFLAGS: 00000213 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f2088d2ec27 RDX: 0000000000000004 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007f20862a5040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000213 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f20862a5000 R15: 0000000020014100 irq event stamp: 549 hardirqs last enabled at (549): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (548): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (544): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (542): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop2: detected capacity change from 0 to 256 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) EXT4-fs error (device loop4): ext4_ext_check_inode:528: inode #2: comm syz-executor.4: pblk 0 bad header/extent: invalid magic - magic 616d, entries 43300, max 14848(0), depth 63625(63625) EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed loop7: detected capacity change from 0 to 63 FAT-fs (loop7): bread failed, FSINFO block (sector = 25215) syz-executor.2 (3968) used greatest stack depth: 23800 bytes left loop7: detected capacity change from 0 to 63 FAT-fs (loop7): bread failed, FSINFO block (sector = 25215) loop6: detected capacity change from 0 to 8 loop3: detected capacity change from 0 to 64 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop6): Invalid FSINFO signature: 0x41615252, 0x00000000 (sector = 1) loop7: detected capacity change from 0 to 63 FAT-fs (loop7): bread failed, FSINFO block (sector = 25215) loop6: detected capacity change from 0 to 4 EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop6): unsupported descriptor size 0 loop6: detected capacity change from 0 to 4 EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop6): unsupported descriptor size 0 audit: type=1400 audit(1768552171.368:10): avc: denied { write } for pid=4026 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1