===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.5/289 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.5/289: #0: ffff88800f5d43f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888017bf4698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f7a0950 (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: 289 Comm: syz-executor.5 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: 0033:0x7fd5ddeb0c27 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:00007ffca9f84bf8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffca9f84c80 RCX: 00007fd5ddeb0c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffca9f84c80 RBP: 00007ffca9f84c5c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffca9f84996 R11: 0000000000000202 R12: 0000000000000032 R13: 00000000000522a7 R14: 0000000000000008 R15: 00007ffca9f84cc0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.5/289 Modules linked in: CPU: 0 UID: 0 PID: 289 Comm: syz-executor.5 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:ffff88801644f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801a538000 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801a5383fc RBP: ffff88801a538000 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801a538000 R13: 0000000000000001 R14: ffffffff85c0d290 R15: ffff88801b797578 FS: 0000555557885400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff7c1479018 CR3: 000000000c6d6000 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: 0033:0x7fd5ddeb0c27 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:00007ffca9f84bf8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffca9f84c80 RCX: 00007fd5ddeb0c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffca9f84c80 RBP: 00007ffca9f84c5c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffca9f84996 R11: 0000000000000202 R12: 0000000000000032 R13: 00000000000522a7 R14: 0000000000000008 R15: 00007ffca9f84cc0 irq event stamp: 385367 hardirqs last enabled at (385367): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (385366): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (385362): [] do_softirq+0x48/0x80 softirqs last disabled at (384805): [] do_softirq+0x48/0x80 ---[ end trace 0000000000000000 ]--- loop6: detected capacity change from 0 to 2048 loop4: detected capacity change from 0 to 2048 loop2: detected capacity change from 0 to 2048 EXT4-fs error (device loop6): __ext4_fill_super:5553: inode #2: comm syz-executor.6: iget: special inode unallocated EXT4-fs (loop6): get root inode failed EXT4-fs (loop6): mount failed EXT4-fs error (device loop2): __ext4_fill_super:5553: inode #2: comm syz-executor.2: iget: special inode unallocated EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed EXT4-fs error (device loop4): __ext4_fill_super:5553: inode #2: comm syz-executor.4: iget: special inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed loop7: detected capacity change from 0 to 2048 loop2: detected capacity change from 0 to 2048 EXT4-fs error (device loop7): __ext4_fill_super:5553: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs error (device loop2): __ext4_fill_super:5553: inode #2: comm syz-executor.2: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed netlink: 48 bytes leftover after parsing attributes in process `syz-executor.0'. loop6: detected capacity change from 0 to 2048 netlink: 48 bytes leftover after parsing attributes in process `syz-executor.1'. loop4: detected capacity change from 0 to 2048 EXT4-fs error (device loop6): __ext4_fill_super:5553: inode #2: comm syz-executor.6: iget: special inode unallocated EXT4-fs error (device loop4): __ext4_fill_super:5553: inode #2: comm syz-executor.4: iget: special inode unallocated EXT4-fs (loop6): get root inode failed EXT4-fs (loop6): mount failed netlink: 48 bytes leftover after parsing attributes in process `syz-executor.1'. EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed EXT4-fs error (device loop2): __ext4_fill_super:5553: inode #2: comm syz-executor.2: iget: special inode unallocated EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed EXT4-fs error (device loop7): __ext4_fill_super:5553: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed EXT4-fs error (device loop6): __ext4_fill_super:5553: inode #2: comm syz-executor.6: iget: special inode unallocated EXT4-fs (loop6): get root inode failed EXT4-fs (loop6): mount failed netlink: 48 bytes leftover after parsing attributes in process `syz-executor.0'. set_capacity_and_notify: 3 callbacks suppressed loop4: detected capacity change from 0 to 2048 EXT4-fs error (device loop4): __ext4_fill_super:5553: inode #2: comm syz-executor.4: iget: special inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed loop6: detected capacity change from 0 to 2048 loop7: detected capacity change from 0 to 2048 EXT4-fs error (device loop7): __ext4_fill_super:5553: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed loop2: detected capacity change from 0 to 2048 EXT4-fs error (device loop6): __ext4_fill_super:5553: inode #2: comm syz-executor.6: iget: special inode unallocated EXT4-fs (loop6): get root inode failed EXT4-fs (loop6): mount failed EXT4-fs error (device loop2): __ext4_fill_super:5553: inode #2: comm syz-executor.2: iget: special inode unallocated EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed netlink: 48 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 48 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 48 bytes leftover after parsing attributes in process `syz-executor.1'. loop4: detected capacity change from 0 to 2048 EXT4-fs error (device loop4): __ext4_fill_super:5553: inode #2: comm syz-executor.4: iget: special inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed loop6: detected capacity change from 0 to 2048 EXT4-fs error (device loop6): __ext4_fill_super:5553: inode #2: comm syz-executor.6: iget: special inode unallocated EXT4-fs (loop6): get root inode failed EXT4-fs (loop6): mount failed