===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.5/6947 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.5/6947: #0: ffff88800fa8c3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801ff20d68 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fa98950 (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: 6947 Comm: syz-executor.5 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: 0033:0x7f438e165427 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:00007ffee7a7efc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f438e165427 RDX: 00007ffee7a7f0a3 RSI: 00007f438e1c002f RDI: 00007ffee7a7f090 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffee7a7ee60 R10: 00007ffee7a7ed17 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffee7a7f090 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.5/6947 Modules linked in: CPU: 0 UID: 0 PID: 6947 Comm: syz-executor.5 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:ffff8880498f79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880141ab700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff8880141abafc RBP: ffff8880141ab700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880141ab700 R13: 0000000000000001 R14: ffffffff85c0d6a0 R15: ffff88801ff16268 FS: 0000555587d2c400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002640 CR3: 000000000d34a000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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: 0033:0x7f438e165427 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:00007ffee7a7efc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f438e165427 RDX: 00007ffee7a7f0a3 RSI: 00007f438e1c002f RDI: 00007ffee7a7f090 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffee7a7ee60 R10: 00007ffee7a7ed17 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffee7a7f090 irq event stamp: 901 hardirqs last enabled at (901): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (900): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (896): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (894): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): bad geometry: block count 256 exceeds size of device (2 blocks) loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): bad geometry: block count 256 exceeds size of device (2 blocks) loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): bad geometry: block count 256 exceeds size of device (2 blocks) loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): bad geometry: block count 256 exceeds size of device (2 blocks) loop1: detected capacity change from 0 to 4 audit: type=1400 audit(1768468269.102:13): avc: denied { read } for pid=7132 comm="syz-executor.2" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 EXT4-fs (loop1): bad geometry: block count 256 exceeds size of device (2 blocks) EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir403940132/syzkaller.SJA4aA/51/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir403940132/syzkaller.SJA4aA/52/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir403940132/syzkaller.SJA4aA/53/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir403940132/syzkaller.SJA4aA/54/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root set_capacity_and_notify: 5 callbacks suppressed loop4: detected capacity change from 0 to 2304 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop4: detected capacity change from 0 to 2304 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop4: detected capacity change from 0 to 2304 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root Bluetooth: hci5: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci5: unexpected event for opcode 0x2029 Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci5: unexpected event for opcode 0x2029 Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci3: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci3: ACL packet for unknown connection handle 2745 Bluetooth: hci5: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci5: unexpected event for opcode 0x2029 Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci3: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci3: ACL packet for unknown connection handle 2745 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci5: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci5: unexpected event for opcode 0x2029 Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci3: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci3: ACL packet for unknown connection handle 2745 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci5: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci5: unexpected event for opcode 0x2029 Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 mmap: syz-executor.5 (7811) uses deprecated remap_file_pages() syscall. See Documentation/mm/remap_file_pages.rst. sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 34 op 0x0:(READ) flags 0x800000 phys_seg 2 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 34 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 35 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Bluetooth: hci5: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci5: Injecting HCI hardware error event Bluetooth: hci5: hardware error 0x00 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 34 op 0x0:(READ) flags 0x800000 phys_seg 2 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 34 op 0x0:(READ) flags 0x800000 phys_seg 2 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 34 op 0x0:(READ) flags 0x800000 phys_seg 2 prio class 2 Bluetooth: hci3: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci3: Injecting HCI hardware error event Bluetooth: hci3: hardware error 0x00 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 34 op 0x0:(READ) flags 0x800000 phys_seg 2 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2