WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.4/5599 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.4/5599: #0: ffff88800f8f43f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88803aa0a078 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f908950 (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: 5599 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_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1894f44427 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 58 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:00007ffec6d080b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1894f44427 RDX: 00007ffec6d08197 RSI: 00007f1894f9f019 RDI: 00007ffec6d08180 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffec6d07f50 R10: 00007ffec6d07e07 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffec6d08180 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.4/5599 Modules linked in: CPU: 0 UID: 0 PID: 5599 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:ffff88801d69f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804aee0000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88804aee03fc RBP: ffff88804aee0000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804aee0000 R13: 0000000000000001 R14: ffffffff85c0e460 R15: ffff88803a899628 FS: 0000555571936400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1894fc4544 CR3: 000000001a7cb000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1894f44427 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 58 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:00007ffec6d080b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1894f44427 RDX: 00007ffec6d08197 RSI: 00007f1894f9f019 RDI: 00007ffec6d08180 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffec6d07f50 R10: 00007ffec6d07e07 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffec6d08180 irq event stamp: 183 hardirqs last enabled at (183): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (182): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (178): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (176): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs error (device loop6): ext4_quota_enable:7184: inode #3: comm syz-executor.6: iget: special inode unallocated EXT4-fs error (device loop6): ext4_quota_enable:7186: comm syz-executor.6: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop6): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop6): mount failed EXT4-fs error (device loop1): ext4_ext_check_inode:528: inode #3: comm syz-executor.1: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) isofs_fill_super: root inode is not a directory. Corrupted media? EXT4-fs error (device loop7): ext4_ext_check_inode:528: inode #3: comm syz-executor.7: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop7): ext4_quota_enable:7186: comm syz-executor.7: Bad quota inode: 3, type: 0 EXT4-fs error (device loop1): ext4_quota_enable:7186: comm syz-executor.1: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop7): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop7): mount failed EXT4-fs warning (device loop1): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop1): mount failed EXT4-fs error (device loop2): ext4_ext_check_inode:528: inode #3: comm syz-executor.2: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop2): ext4_quota_enable:7186: comm syz-executor.2: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop2): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop2): mount failed EXT4-fs error (device loop5): ext4_ext_check_inode:528: inode #3: comm syz-executor.5: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop5): ext4_quota_enable:7186: comm syz-executor.5: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop5): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop5): mount failed set_capacity_and_notify: 9 callbacks suppressed loop3: detected capacity change from 0 to 136 loop5: detected capacity change from 0 to 2048 loop3: detected capacity change from 0 to 184 EXT4-fs error (device loop5): ext4_ext_check_inode:528: inode #3: comm syz-executor.5: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop5): ext4_quota_enable:7186: comm syz-executor.5: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop5): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop5): mount failed loop6: detected capacity change from 0 to 2048 loop0: detected capacity change from 0 to 2048 loop2: detected capacity change from 0 to 2048 loop4: detected capacity change from 0 to 184 loop1: detected capacity change from 0 to 2048 EXT4-fs error (device loop0): ext4_ext_check_inode:528: inode #3: comm syz-executor.0: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) isofs_fill_super: root inode is not a directory. Corrupted media? EXT4-fs error (device loop0): ext4_quota_enable:7186: comm syz-executor.0: Bad quota inode: 3, type: 0 loop7: detected capacity change from 0 to 2048 EXT4-fs warning (device loop0): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed EXT4-fs error (device loop6): ext4_quota_enable:7184: inode #3: comm syz-executor.6: iget: special inode unallocated EXT4-fs error (device loop2): ext4_ext_check_inode:528: inode #3: comm syz-executor.2: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop6): ext4_quota_enable:7186: comm syz-executor.6: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop6): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop6): mount failed EXT4-fs error (device loop2): ext4_quota_enable:7186: comm syz-executor.2: Bad quota inode: 3, type: 0 EXT4-fs error (device loop1): ext4_ext_check_inode:528: inode #3: comm syz-executor.1: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs warning (device loop2): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. loop3: detected capacity change from 0 to 136 EXT4-fs error (device loop7): ext4_ext_check_inode:528: inode #3: comm syz-executor.7: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop7): ext4_quota_enable:7186: comm syz-executor.7: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop7): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop7): mount failed EXT4-fs (loop2): mount failed EXT4-fs error (device loop1): ext4_quota_enable:7186: comm syz-executor.1: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop1): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop1): mount failed EXT4-fs error (device loop5): ext4_ext_check_inode:528: inode #3: comm syz-executor.5: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop5): ext4_quota_enable:7186: comm syz-executor.5: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop5): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop5): mount failed EXT4-fs error (device loop6): ext4_quota_enable:7184: inode #3: comm syz-executor.6: iget: special inode unallocated EXT4-fs error (device loop6): ext4_quota_enable:7186: comm syz-executor.6: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop6): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop6): mount failed EXT4-fs error (device loop0): ext4_ext_check_inode:528: inode #3: comm syz-executor.0: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0) EXT4-fs error (device loop0): ext4_quota_enable:7186: comm syz-executor.0: Bad quota inode: 3, type: 0 EXT4-fs warning (device loop0): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix. EXT4-fs (loop0): mount failed