loop1: detected capacity change from 0 to 608 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.2/4163 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.2/4163: #0: ffff88800f9123f8 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1764/0x2d60 #1: ffff8880344f59a8 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: path_openat+0xe32/0x2d60 #2: ffff88800f916950 (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: 4163 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260116 #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_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_creat+0xcc/0x120 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3012648b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f300fbbe188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f301275bf60 RCX: 00007f3012648b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000300 RBP: 00007f30126a2f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff6490edef R14: 00007f300fbbe300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.2/4163 Modules linked in: CPU: 0 UID: 0 PID: 4163 Comm: syz-executor.2 Not tainted 6.19.0-rc5-next-20260116 #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:ffff8880164b7510 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888049230000 RCX: ffffc900007e5000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff8880492303fc RBP: ffff888049230000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888049230000 R13: 0000000000000001 R14: ffffffff85c109e0 R15: ffff888034471628 FS: 00007f300fbbe700(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555580ab7098 CR3: 000000000ba4f000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_creat+0xcc/0x120 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3012648b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f300fbbe188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f301275bf60 RCX: 00007f3012648b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000300 RBP: 00007f30126a2f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff6490edef R14: 00007f300fbbe300 R15: 0000000000022000 irq event stamp: 2433 hardirqs last enabled at (2433): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (2432): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (2428): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (2426): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- FAT-fs (loop1): Invalid FSINFO signature: 0x00000009, 0x61417272 (sector = 1) 9p: Bad value for 'port' loop4: detected capacity change from 0 to 4 EXT4-fs (loop4): mounting ext2 file system using the ext4 subsystem EXT4-fs (loop4): invalid inodes per group: 536870944 9p: Bad value for 'port' loop4: detected capacity change from 0 to 144 EXT4-fs (loop4): mounted filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09 r/w without journal. Quota mode: none. syz-executor.6 (4204) used greatest stack depth: 24200 bytes left ext4 filesystem being mounted at /syzkaller-testdir562191864/syzkaller.nSzFDe/6/mnt supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs error (device loop4): __ext4_find_entry:1624: inode #2: comm syz-executor.4: checksumming directory block 0 EXT4-fs error (device loop4): __ext4_find_entry:1624: inode #2: comm syz-executor.4: checksumming directory block 0 EXT4-fs error (device loop4): __ext4_find_entry:1624: inode #2: comm syz-executor.4: checksumming directory block 0 EXT4-fs error (device loop4): __ext4_find_entry:1624: inode #2: comm syz-executor.4: checksumming directory block 0 EXT4-fs error (device loop4): __ext4_find_entry:1624: inode #2: comm syz-executor.4: checksumming directory block 0 EXT4-fs error (device loop4): __ext4_find_entry:1624: inode #2: comm syz-executor.4: checksumming directory block 0 ieee802154 phy0 wpan0: encryption failed: -22 EXT4-fs (loop4): unmounting filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09. loop4: detected capacity change from 0 to 144 loop6: detected capacity change from 0 to 144 EXT4-fs (loop4): mounted filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09 r/w without journal. Quota mode: none. EXT4-fs (loop6): mounted filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir562191864/syzkaller.nSzFDe/7/mnt supports timestamps until 2038-01-19 (0x7fffffff) ext4 filesystem being mounted at /syzkaller-testdir141926333/syzkaller.USF8D7/17/mnt supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs error (device loop4): __ext4_find_entry:1624: inode #2: comm syz-executor.4: checksumming directory block 0 EXT4-fs error (device loop6): __ext4_find_entry:1624: inode #2: comm syz-executor.6: checksumming directory block 0 EXT4-fs error (device loop4): __ext4_find_entry:1624: inode #2: comm syz-executor.4: checksumming directory block 0 EXT4-fs error (device loop6): __ext4_find_entry:1624: inode #2: comm syz-executor.6: checksumming directory block 0 EXT4-fs error (device loop4): __ext4_find_entry:1624: inode #2: comm syz-executor.4: checksumming directory block 0 EXT4-fs error (device loop6): __ext4_find_entry:1624: inode #2: comm syz-executor.6: checksumming directory block 0 EXT4-fs (loop4): unmounting filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09. EXT4-fs (loop6): unmounting filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09.