===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.4/4409 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.4/4409: #0: ffff88800f8983f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804ccd3388 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f89c950 (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: 4409 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260114 #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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8cac7cb427 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:00007fff67847448 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8cac7cb427 RDX: ffffffffffffffbc RSI: 00007f8cac82600e RDI: 00007f8cac8251dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff67846ec0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff67847510 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.4/4409 Modules linked in: CPU: 1 UID: 0 PID: 4409 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260114 #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 16 c0 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 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff88804b9bf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888014760000 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff8880147603fc RBP: ffff888014760000 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888014760000 R13: 0000000000000001 R14: ffffffff85c0f0e0 R15: ffff88804ce3a938 FS: 000055556fbdf400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa726af6718 CR3: 000000004e66f000 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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8cac7cb427 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:00007fff67847448 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8cac7cb427 RDX: ffffffffffffffbc RSI: 00007f8cac82600e RDI: 00007f8cac8251dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff67846ec0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff67847510 irq event stamp: 655 hardirqs last enabled at (655): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (654): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (648): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (646): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. audit: type=1400 audit(1768379214.510:10): avc: denied { watch_reads } for pid=4457 comm="syz-executor.2" path="/syzkaller-testdir938801994/syzkaller.IX45RW/34/file0" dev="tmpfs" ino=1 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir permissive=1 serio: Serial port ptm2 serio: Serial port ptm0 ALSA: seq fatal error: cannot create timer (-22) serio: Serial port ptm0 ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) serio: Serial port ptm0 serio: Serial port ptm1 ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) serio: Serial port ptm0 serio: Serial port ptm1 serio: Serial port ptm0 set_capacity_and_notify: 4 callbacks suppressed loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): Invalid default hash set in the superblock loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): Invalid default hash set in the superblock loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): Invalid default hash set in the superblock Bluetooth: hci0: Opcode 0x080f failed: -4 EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 35 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 35 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 35 (only 16 groups) Bluetooth: hci0: Opcode 0x080f failed: -4 EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 35 (only 16 groups) Bluetooth: hci0: command 0x080f tx timeout Bluetooth: hci0: Opcode 0x080f failed: -110 Bluetooth: hci0: Opcode 0x080f failed: -4 Bluetooth: hci2: unexpected event 0x3e length: 431 > 260 Bluetooth: hci2: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci2: adv larger than maximum supported Bluetooth: hci2: adv larger than maximum supported Bluetooth: hci2: unexpected event 0x3e length: 431 > 260 Bluetooth: hci2: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci2: adv larger than maximum supported Bluetooth: hci2: adv larger than maximum supported loop5: detected capacity change from 0 to 1294 audit: type=1400 audit(1768379222.137:11): avc: denied { block_suspend } for pid=4872 comm="syz-executor.2" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 Bluetooth: hci2: unexpected event 0x3e length: 431 > 260 Bluetooth: hci2: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci2: adv larger than maximum supported Bluetooth: hci2: adv larger than maximum supported Bluetooth: hci2: unexpected event 0x3e length: 431 > 260 Bluetooth: hci2: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci2: adv larger than maximum supported Bluetooth: hci2: adv larger than maximum supported Bluetooth: hci2: unexpected event 0x3e length: 431 > 260 Bluetooth: hci2: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci2: adv larger than maximum supported Bluetooth: hci2: adv larger than maximum supported audit: type=1326 audit(1768379222.705:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4926 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fe5b227fb19 code=0x7ffc0000 audit: type=1326 audit(1768379222.706:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4926 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=334 compat=0 ip=0x7fe5b227fb19 code=0x7ffc0000 audit: type=1326 audit(1768379222.706:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4926 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fe5b227fb19 code=0x7ffc0000 audit: type=1326 audit(1768379222.706:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4926 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7fe5b227fb19 code=0x7ffc0000 audit: type=1326 audit(1768379222.719:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4926 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fe5b227fb19 code=0x7ffc0000 Bluetooth: hci0: command 0x080f tx timeout audit: type=1326 audit(1768379222.912:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4944 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fd45d4bbb19 code=0x7ffc0000 audit: type=1326 audit(1768379222.919:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4944 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=334 compat=0 ip=0x7fd45d4bbb19 code=0x7ffc0000 audit: type=1326 audit(1768379222.919:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4944 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fd45d4bbb19 code=0x7ffc0000 audit: type=1326 audit(1768379222.919:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4944 comm="syz-executor.2" exe="/syz-executor.2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fd45d4bbb19 code=0x7ffc0000 Bluetooth: hci7: link tx timeout Bluetooth: hci7: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci7: link tx timeout Bluetooth: hci7: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci7: link tx timeout Bluetooth: hci7: killing stalled connection 11:aa:aa:aa:aa:aa Bluetooth: hci7: link tx timeout Bluetooth: hci7: killing stalled connection 11:aa:aa:aa:aa:aa