===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.1/4447 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.1/4447: #0: ffff88800f8803f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804b814698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f884950 (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: 1 UID: 0 PID: 4447 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_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: 0033:0x7fc16c5c0427 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:00007fff86bad9a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc16c5c0427 RDX: 00007fff86bada87 RSI: 00007fc16c61b019 RDI: 00007fff86bada70 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff86bad840 R10: 00007fff86bad6f7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff86bada70 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.1/4447 Modules linked in: CPU: 1 UID: 0 PID: 4447 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:ffff88804ac7f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804a3b9b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88804a3b9f7c RBP: ffff88804a3b9b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804a3b9b80 R13: 0000000000000001 R14: ffffffff85c0d330 R15: ffff88801ca0cf58 FS: 000055557a0b4400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc16c640541 CR3: 000000000cf31000 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: 0033:0x7fc16c5c0427 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:00007fff86bad9a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc16c5c0427 RDX: 00007fff86bada87 RSI: 00007fc16c61b019 RDI: 00007fff86bada70 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff86bad840 R10: 00007fff86bad6f7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff86bada70 irq event stamp: 185 hardirqs last enabled at (185): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (184): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (178): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (176): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (46507!=0) EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (46507!=0) EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (46507!=0) EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. tc_dump_action: action bad kind netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. tc_dump_action: action bad kind EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (46507!=0) EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. tc_dump_action: action bad kind loop6: detected capacity change from 0 to 64 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. tc_dump_action: action bad kind netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. tc_dump_action: action bad kind Bluetooth: hci7: Opcode 0x0c03 failed: -110 Bluetooth: hci3: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci3: Injecting HCI hardware error event Bluetooth: hci3: hardware error 0x00 Bluetooth: hci1: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci1: Injecting HCI hardware error event Bluetooth: hci1: hardware error 0x00 Bluetooth: hci2: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci2: Injecting HCI hardware error event Bluetooth: hci4: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci4: Injecting HCI hardware error event Bluetooth: hci4: hardware error 0x00 Bluetooth: hci2: hardware error 0x00 loop1: detected capacity change from 0 to 128 loop1: detected capacity change from 0 to 128 loop1: detected capacity change from 0 to 128 loop1: detected capacity change from 0 to 128 loop7: detected capacity change from 0 to 4 EXT4-fs (loop7): mounting ext2 file system using the ext4 subsystem EXT4-fs (loop7): invalid inodes per group: 536870944 loop7: detected capacity change from 0 to 4 EXT4-fs (loop7): mounting ext2 file system using the ext4 subsystem EXT4-fs (loop7): invalid inodes per group: 536870944 loop7: detected capacity change from 0 to 4 EXT4-fs (loop7): mounting ext2 file system using the ext4 subsystem EXT4-fs (loop7): invalid inodes per group: 536870944 loop7: detected capacity change from 0 to 4 EXT4-fs (loop7): mounting ext2 file system using the ext4 subsystem EXT4-fs (loop7): invalid inodes per group: 536870944 loop7: detected capacity change from 0 to 4 EXT4-fs (loop7): mounting ext2 file system using the ext4 subsystem EXT4-fs (loop7): invalid inodes per group: 536870944 netlink: 'syz-executor.4': attribute type 16 has an invalid length. netlink: 'syz-executor.4': attribute type 16 has an invalid length. Bluetooth: hci3: Opcode 0x0c03 failed: -110 netlink: 'syz-executor.4': attribute type 16 has an invalid length. netlink: 'syz-executor.4': attribute type 16 has an invalid length. Bluetooth: hci1: Opcode 0x0c03 failed: -110 Bluetooth: hci4: Opcode 0x0c03 failed: -110 Bluetooth: hci2: Opcode 0x0c03 failed: -110 Bluetooth: hci6: command 0x0405 tx timeout netlink: 'syz-executor.4': attribute type 16 has an invalid length. audit: type=1400 audit(1768575472.604:10): avc: denied { module_load } for pid=5047 comm="syz-executor.2" path=2F6D656D66643A2F70726F632F7468726561642D73656C662F617474722F6673637265617465202864656C6574656429 dev="tmpfs" ino=1037 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=system permissive=1 audit: type=1400 audit(1768575472.924:11): avc: denied { tracepoint } for pid=5091 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 mmap: syz-executor.4 (5097) 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 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 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. 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 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. 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 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. 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 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 sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer audit: type=1400 audit(1768575474.393:12): avc: denied { watch_reads } for pid=5285 comm="syz-executor.3" path="/syzkaller-testdir940707347/syzkaller.0xa4tw/77" dev="sda" ino=15990 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive.