===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.2/4256 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.2/4256: #0: ffff88800fcd63f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880444decb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f83a950 (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: 4256 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_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: 0033:0x7f5d1031c427 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:00007ffec80def58 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5d1031c427 RDX: 00007ffec80df033 RSI: 00007f5d1037702f RDI: 00007ffec80df020 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffec80dedf0 R10: 00007ffec80deca7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffec80df020 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.2/4256 Modules linked in: CPU: 0 UID: 0 PID: 4256 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:ffff8880457bf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804cc39b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88804cc39f7c RBP: ffff88804cc39b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804cc39b80 R13: 0000000000000001 R14: ffffffff85c0f4f0 R15: ffff8880445532c0 FS: 00005555774a9400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d1039c542 CR3: 000000004f5dc000 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: 0033:0x7f5d1031c427 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:00007ffec80def58 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5d1031c427 RDX: 00007ffec80df033 RSI: 00007f5d1037702f RDI: 00007ffec80df020 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffec80dedf0 R10: 00007ffec80deca7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffec80df020 irq event stamp: 409 hardirqs last enabled at (409): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (408): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (402): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (400): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(1768572960.153:10): avc: denied { write } for pid=4290 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 ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' tmpfs: Unknown parameter 'huge}alw„ys' Bluetooth: hci0: Opcode 0x0c03 failed: -4 audit: type=1400 audit(1768572964.577:11): avc: denied { read } for pid=4770 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2087 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 2087 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 0 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2 Buffer I/O error on dev sr0, logical block 0, lost async page write Buffer I/O error on dev sr0, logical block 1, lost async page write Buffer I/O error on dev sr0, logical block 2, lost async page write Buffer I/O error on dev sr0, logical block 3, lost async page write Buffer I/O error on dev sr0, logical block 4, lost async page write Buffer I/O error on dev sr0, logical block 5, lost async page write Buffer I/O error on dev sr0, logical block 6, lost async page write Buffer I/O error on dev sr0, logical block 7, lost async page write Buffer I/O error on dev sr0, logical block 8, lost async page write Buffer I/O error on dev sr0, logical block 9, lost async page write sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 127 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 254 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 381 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 508 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 635 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 762 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 889 op 0x1:(WRITE) flags 0x804800 phys_seg 127 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer syz-executor.4 (4863) used greatest stack depth: 24000 bytes left 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 : Illegal Request [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 00 01 fc 00 00 0c 00 sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer 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 : Illegal Request [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 00 01 fc 00 00 0c 00 sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. audit: type=1400 audit(1768572966.314:12): avc: denied { block_suspend } for pid=4963 comm="syz-executor.5" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 Bluetooth: hci5: unexpected event 0x3e length: 431 > 260 Bluetooth: hci5: unexpected subevent 0x0d length: 430 > 260 sr 1:0:0:0: [sr0] tag#0 unaligned transfer Bluetooth: hci5: adv larger than maximum supported sr 1:0:0:0: [sr0] tag#0 unaligned transfer Bluetooth: hci5: adv larger than maximum supported Bluetooth: hci5: adv larger than maximum supported sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer 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 : Illegal Request [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 00 01 fc 00 00 0c 00 Bluetooth: hci4: unexpected event 0x3e length: 431 > 260 Bluetooth: hci4: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci4: adv larger than maximum supported Bluetooth: hci4: adv larger than maximum supported Bluetooth: hci4: adv larger than maximum supported Bluetooth: hci5: unexpected event 0x3e length: 431 > 260 Bluetooth: hci5: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci5: adv larger than maximum supported Bluetooth: hci5: adv larger than maximum supported Bluetooth: hci5: adv larger than maximum supported Bluetooth: hci6: unexpected event 0x3e length: 431 > 260 Bluetooth: hci6: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci6: adv larger than maximum supported Bluetooth: hci2: unexpected event 0x3e length: 431 > 260 Bluetooth: hci2: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci4: unexpected event 0x3e length: 431 > 260 Bluetooth: hci4: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci6: unexpected event 0x3e length: 431 > 260 Bluetooth: hci6: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci5: unexpected event 0x3e length: 431 > 260 Bluetooth: hci5: unexpected subevent 0x0d length: 430 > 260 syz-executor.4 (4985) used greatest stack depth: 23920 bytes left Bluetooth: hci6: unexpected event 0x3e length: 431 > 260 Bluetooth: hci6: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci4: unexpected event 0x3e length: 431 > 260 Bluetooth: hci4: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci5: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci2: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci2: unexpected subevent 0x0d length: 430 > 260