loop3: detected capacity change from 0 to 512 EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.1/4471 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.1/4471: #0: ffff88800fc123f8 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1764/0x2d60 #1: ffff8880097083e0 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: path_openat+0xe32/0x2d60 #2: ffff88800fc16950 (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: 4471 Comm: syz-executor.1 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: 0033:0x7f3d7a9dcb19 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:00007f3d77f52188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f3d7aaeff60 RCX: 00007f3d7a9dcb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0 RBP: 00007f3d7aa36f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcdbb547df R14: 00007f3d77f52300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.1/4471 Modules linked in: CPU: 0 UID: 0 PID: 4471 Comm: syz-executor.1 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:ffff88801e6a7510 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888049931b80 RCX: ffffc900042ab000 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888049931f7c RBP: ffff888049931b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888049931b80 R13: 0000000000000001 R14: ffffffff85c0d920 R15: ffff88801e1c0318 FS: 00007f3d77f52700(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb77eeaf718 CR3: 0000000017b99000 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: 0033:0x7f3d7a9dcb19 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:00007f3d77f52188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f3d7aaeff60 RCX: 00007f3d7a9dcb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0 RBP: 00007f3d7aa36f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcdbb547df R14: 00007f3d77f52300 R15: 0000000000022000 irq event stamp: 1753 hardirqs last enabled at (1753): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (1752): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (1748): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (1746): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop1: detected capacity change from 0 to 512 EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 2097151 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 07 ff c0 00 00 02 00 I/O error, dev sr0, sector 2096896 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 I/O error, dev loop0, sector 2096896 op 0x0:(READ) flags 0x880700 phys_seg 1 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2096896 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2096897 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 I/O error, dev loop0, sector 2096896 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 2096896, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev loop0, sector 2096897 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 2096897, async page read I/O error, dev sr0, sector 2096898 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2096899 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 I/O error, dev loop0, sector 2096898 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 2096898, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev loop0, sector 2096899 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 2096899, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev loop0, logical block 2096900, async page read Buffer I/O error on dev loop0, logical block 2096901, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev loop0, logical block 2096902, async page read Buffer I/O error on dev loop0, logical block 2096903, async page read loop3: detected capacity change from 0 to 512 EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop0: detected capacity change from 0 to 2097151 EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. random: crng reseeded on system resumption loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop0: detected capacity change from 0 to 2097151 random: crng reseeded on system resumption EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. random: crng reseeded on system resumption loop3: detected capacity change from 0 to 512 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 07 ff c0 00 00 02 00 blk_print_req_error: 8 callbacks suppressed I/O error, dev sr0, sector 2096896 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 I/O error, dev loop0, sector 2096896 op 0x0:(READ) flags 0x880700 phys_seg 1 prio class 2 EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 07 ff c0 00 00 02 00 I/O error, dev sr0, sector 2096896 op 0x0:(READ) flags 0x800000 phys_seg 8 prio class 2 I/O error, dev loop0, sector 2096896 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 2096896, async page read I/O error, dev loop0, sector 2096897 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 2096897, async page read I/O error, dev loop0, sector 2096898 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 2096898, async page read I/O error, dev loop0, sector 2096899 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 2096899, async page read I/O error, dev loop0, sector 2096900 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 2096900, async page read I/O error, dev loop0, sector 2096901 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 2096901, async page read I/O error, dev loop0, sector 2096902 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 2096902, async page read Buffer I/O error on dev loop0, logical block 2096903, async page read