R13: 0000000000000004 R14: 0000000020000230 R15: 0000000000000002 netlink: 208 bytes leftover after parsing attributes in process `syz-executor.0'. ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.0/277 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.0/277: #0: ffff88800f8f43f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888018b659a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800a0e8950 (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: 277 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260113 #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 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb6cf89fc27 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:00007ffc7c278098 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc7c278120 RCX: 00007fb6cf89fc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc7c278120 RBP: 00007ffc7c2780fc R08: 0000000000000000 R09: 0000000000000005 R10: 00007ffc7c277e35 R11: 0000000000000202 R12: 0000000000000032 R13: 0000000000090258 R14: 0000000000000003 R15: 00007ffc7c278160 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.0/277 Modules linked in: CPU: 0 UID: 0 PID: 277 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260113 #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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff88801ac679e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888016533700 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff888016533afc RBP: ffff888016533700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888016533700 R13: 0000000000000001 R14: ffffffff85c102b0 R15: ffff8880097a0ca0 FS: 0000555578863400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555564858708 CR3: 000000000c17d000 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 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb6cf89fc27 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:00007ffc7c278098 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc7c278120 RCX: 00007fb6cf89fc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc7c278120 RBP: 00007ffc7c2780fc R08: 0000000000000000 R09: 0000000000000005 R10: 00007ffc7c277e35 R11: 0000000000000202 R12: 0000000000000032 R13: 0000000000090258 R14: 0000000000000003 R15: 00007ffc7c278160 irq event stamp: 603857 hardirqs last enabled at (603857): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (603856): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (603852): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (603850): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop7: detected capacity change from 0 to 4 FAT-fs (loop7): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop5): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock EXT4-fs (loop5): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (60729!=0) EXT4-fs error (device loop5): __ext4_get_inode_loc:4828: comm syz-executor.5: Invalid inode table block 0 in block_group 0 EXT4-fs (loop5): get root inode failed netlink: 208 bytes leftover after parsing attributes in process `syz-executor.0'. EXT4-fs (loop5): mount failed FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 netlink: 208 bytes leftover after parsing attributes in process `syz-executor.0'. CPU: 0 UID: 0 PID: 6768 Comm: syz-executor.7 Tainted: G W 6.19.0-rc5-next-20260113 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 should_fail_ex+0x4d7/0x5e0 should_failslab+0xc2/0x120 kmem_cache_alloc_noprof+0x80/0x760 __kernfs_new_node+0xd3/0x940 kernfs_new_node+0x13c/0x1e0 kernfs_create_dir_ns+0x4d/0x1a0 internal_create_group+0x440/0xeb0 loop_configure+0xc46/0x15a0 lo_ioctl+0x674/0x1cb0 blkdev_ioctl+0x365/0x6d0 __x64_sys_ioctl+0x18f/0x210 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6b167e08d7 Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 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:00007f6b13d55f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6b1682a970 RCX: 00007f6b167e08d7 RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005 RBP: 0000000000000005 R08: 0000000000000000 R09: ffffffffffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 0000000000000004 R14: 0000000020000230 R15: 0000000000000002 loop7: detected capacity change from 0 to 4 FAT-fs (loop7): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.