EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.7/284 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.7/284: #0: ffff88800a6a23f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801c240d68 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800a7fe950 (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: 284 Comm: syz-executor.7 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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3a038a4c27 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 53 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:00007ffd6cba6d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd6cba6dd0 RCX: 00007f3a038a4c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd6cba6dd0 RBP: 00007ffd6cba6dac R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffd6cba6ae6 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000209aa R14: 0000000000000001 R15: 00007ffd6cba6e10 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.7/284 Modules linked in: CPU: 0 UID: 0 PID: 284 Comm: syz-executor.7 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:ffff88801b70f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b355280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801b35567c RBP: ffff88801b355280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b355280 R13: 0000000000000001 R14: ffffffff85c0cc50 R15: ffff88803578b2c0 FS: 0000555563248400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555563259c98 CR3: 000000000e639000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3a038a4c27 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 53 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:00007ffd6cba6d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd6cba6dd0 RCX: 00007f3a038a4c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd6cba6dd0 RBP: 00007ffd6cba6dac R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffd6cba6ae6 R11: 0000000000000206 R12: 0000000000000032 R13: 00000000000209aa R14: 0000000000000001 R15: 00007ffd6cba6e10 irq event stamp: 285223 hardirqs last enabled at (285223): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (285222): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (285218): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (285216): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. Bluetooth: hci3: command tx timeout EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1400 audit(1768467431.403:10): avc: denied { tracepoint } for pid=4475 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 Bluetooth: hci5: command tx timeout Bluetooth: hci4: command tx timeout audit: type=1400 audit(1768467432.969:11): avc: denied { write } for pid=4611 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 Bluetooth: hci3: command tx timeout audit: type=1326 audit(1768467433.323:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4655 comm="syz-executor.7" exe="/syz-executor.7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f3a038a5b19 code=0x0 set_capacity_and_notify: 13 callbacks suppressed loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci5: command tx timeout Bluetooth: hci4: command tx timeout audit: type=1326 audit(1768467434.157:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4655 comm="syz-executor.7" exe="/syz-executor.7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f3a038a5b19 code=0x0 loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. audit: type=1326 audit(1768467434.295:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4700 comm="syz-executor.7" exe="/syz-executor.7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f3a038a5b19 code=0x0 EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1326 audit(1768467434.490:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4716 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f3360b6cb19 code=0x0 loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci3: command tx timeout audit: type=1326 audit(1768467435.365:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4735 comm="syz-executor.7" exe="/syz-executor.7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f3a038a5b19 code=0x0 audit: type=1400 audit(1768467435.384:17): avc: denied { module_load } for pid=4737 comm="syz-executor.4" path=2F6D656D66643A2F70726F632F7468726561642D73656C662F617474722F6673637265617465202864656C6574656429 dev="tmpfs" ino=1062 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=system permissive=1 loop5: detected capacity change from 0 to 2048 audit: type=1326 audit(1768467435.446:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4744 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f3360b6cb19 code=0x0 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci5: command tx timeout Bluetooth: hci4: command tx timeout audit: type=1326 audit(1768467436.376:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4761 comm="syz-executor.7" exe="/syz-executor.7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f3a038a5b19 code=0x0 kauditd_printk_skb: 1 callbacks suppressed audit: type=1400 audit(1768467436.553:21): avc: denied { read } for pid=4779 comm="syz-executor.6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 Bluetooth: hci3: command tx timeout netlink: 'syz-executor.1': attribute type 25 has an invalid length. netlink: 'syz-executor.1': attribute type 25 has an invalid length. netlink: 'syz-executor.1': attribute type 25 has an invalid length. netlink: 'syz-executor.1': attribute type 25 has an invalid length. netlink: 'syz-executor.1': attribute type 25 has an invalid length. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. ieee80211 phy18: Selected rate control algorithm 'minstrel_ht' Bluetooth: hci3: command tx timeout netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. ieee80211 phy19: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.6'. ieee80211 phy20: Selected rate control algorithm 'minstrel_ht'