===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.0/275 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.0/275: #0: ffff88800f7cc3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801aad03e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f7b0950 (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: 275 Comm: syz-executor.0 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_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: 0033:0x7fd00c9fcc27 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:00007fff6d8c33f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff6d8c3480 RCX: 00007fd00c9fcc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff6d8c3480 RBP: 00007fff6d8c345c R08: 0000000000000000 R09: 0000000000000004 R10: 00007fff6d8c3196 R11: 0000000000000202 R12: 0000000000000032 R13: 0000000000021a8d R14: 0000000000000002 R15: 00007fff6d8c34c0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/275 Modules linked in: CPU: 1 UID: 0 PID: 275 Comm: syz-executor.0 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:ffff88801db3f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888016363700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888016363afc RBP: ffff888016363700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888016363700 R13: 0000000000000001 R14: ffffffff85c0e280 R15: ffff88803f1e45d0 FS: 0000555572b46400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff6d8c1bb8 CR3: 000000001f312000 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: 0033:0x7fd00c9fcc27 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:00007fff6d8c33f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff6d8c3480 RCX: 00007fd00c9fcc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007fff6d8c3480 RBP: 00007fff6d8c345c R08: 0000000000000000 R09: 0000000000000004 R10: 00007fff6d8c3196 R11: 0000000000000202 R12: 0000000000000032 R13: 0000000000021a8d R14: 0000000000000002 R15: 00007fff6d8c34c0 irq event stamp: 293477 hardirqs last enabled at (293477): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (293476): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (293472): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (293470): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- Bluetooth: hci1: command 0x0c1a tx timeout EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir093182887/syzkaller.7yHV8p/34/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir093182887/syzkaller.7yHV8p/35/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir093182887/syzkaller.7yHV8p/36/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. lo: entered promiscuous mode lo: left promiscuous mode loop5: detected capacity change from 0 to 2048 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir093182887/syzkaller.7yHV8p/37/file0 supports timestamps until 2038-01-19 (0x7fffffff) audit: type=1326 audit(1768577163.925:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4596 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fe74e9e1b19 code=0x0 EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci0: command 0x0c1a tx timeout Bluetooth: hci2: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout audit: type=1326 audit(1768577164.761:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4596 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fe74e9e1b19 code=0x0 UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list audit: type=1326 audit(1768577164.922:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4637 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fe74e9e1b19 code=0x0 loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci1: command 0x0c1a tx timeout audit: type=1326 audit(1768577165.817:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4681 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fe74e9e1b19 code=0x0 loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci2: command 0x0c1a tx timeout Bluetooth: hci0: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list loop1: detected capacity change from 0 to 512 audit: type=1326 audit(1768577166.748:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4728 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fe74e9e1b19 code=0x0 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. serio: Serial port ptm0 serio: Serial port ptm0 loop1: detected capacity change from 0 to 6 9p: Bad value for 'rfdno' 9p: Bad value for 'rfdno' blktrace: Concurrent blktraces are not allowed on sg0 Bluetooth: hci6: Unexpected cc 0xdc53 with no status Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci6: unexpected event for opcode 0x0400 Bluetooth: hci6: SCO packet for unknown connection handle 201 Bluetooth: hci6: unexpected event 0x2f length: 763 > 260 Bluetooth: hci6: ISO packet for unknown connection handle 1106 Bluetooth: hci6: ACL packet for unknown connection handle 200 blktrace: Concurrent blktraces are not allowed on sg0 Bluetooth: hci6: Unexpected cc 0xdc53 with no status Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci6: unexpected event for opcode 0x0400 Bluetooth: hci6: SCO packet for unknown connection handle 201 Bluetooth: hci6: unexpected event 0x2f length: 763 > 260 Bluetooth: hci6: ISO packet for unknown connection handle 1106 Bluetooth: hci6: ACL packet for unknown connection handle 200 blktrace: Concurrent blktraces are not allowed on sg0 tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' loop1: detected capacity change from 0 to 5 FAT-fs (loop1): Directory bread(block 5) failed FAT-fs (loop1): Directory bread(block 6) failed blktrace: Concurrent blktraces are not allowed on sg0 FAT-fs (loop1): Directory bread(block 5) failed FAT-fs (loop1): Directory bread(block 6) failed Bluetooth: hci6: Unexpected cc 0xdc53 with no status Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci6: unexpected event for opcode 0x0400 Bluetooth: hci6: SCO packet for unknown connection handle 201 Bluetooth: hci6: unexpected event 0x2f length: 763 > 260 Bluetooth: hci6: ISO packet for unknown connection handle 1106 Bluetooth: hci6: ACL packet for unknown connection handle 200 loop1: detected capacity change from 0 to 5 Bluetooth: hci6: Unexpected cc 0xdc53 with no status FAT-fs (loop1): Directory bread(block 5) failed Bluetooth: hci6: ACL packet for unknown connection handle 2745 FAT-fs (loop1): Directory bread(block 6) failed Bluetooth: hci6: unexpected event for opcode 0x0400 Bluetooth: hci6: SCO packet for unknown connection handle 201 Bluetooth: hci6: unexpected event 0x2f length: 763 > 260 Bluetooth: hci6: ISO packet for unknown connection handle 1106 Bluetooth: hci6: ACL packet for unknown connection handle 200 FAT-fs (loop1): Directory bread(block 5) failed FAT-fs (loop1): Directory bread(block 6) failed loop1: detected capacity change from 0 to 5 FAT-fs (loop1): Directory bread(block 5) failed FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 5) failed FAT-fs (loop1): Directory bread(block 6) failed Bluetooth: hci6: Unexpected cc 0xdc53 with no status Bluetooth: hci6: ACL packet for unknown connection handle 2745 Bluetooth: hci6: unexpected event for opcode 0x0400 Bluetooth: hci6: SCO packet for unknown connection handle 201 Bluetooth: hci6: unexpected event 0x2f length: 763 > 260 Bluetooth: hci6: ISO packet for unknown connection handle 1106 Bluetooth: hci6: ACL packet for unknown connection handle 200 loop1: detected capacity change from 0 to 5 audit: type=1400 audit(1768577170.600:17): avc: denied { create } for pid=5016 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:auditd_log_t:s0 tclass=key permissive=1 FAT-fs (loop1): Directory bread(block 5) failed FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 5) failed FAT-fs (loop1): Directory bread(block 6) failed audit: type=1400 audit(1768577171.257:18): avc: denied { tracepoint } for pid=5073 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 9pnet_fd: p9_fd_create_tcp (5094): problem connecting socket to 127.0.0.1 9pnet_fd: p9_fd_create_tcp (5099): problem connecting socket to 127.0.0.1 loop4: detected capacity change from 0 to 4 EXT4-fs (loop4): fragment/cluster size (16384) != block size (1024) loop4: detected capacity change from 0 to 4 EXT4-fs (loop4): fragment/cluster size (16384) != block size (1024) 9pnet_fd: p9_fd_create_tcp (5112): problem connecting socket to 127.0.0.1 loop4: detected capacity change from 0 to 4 EXT4-fs (loop4): fragment/cluster size (16384) != block size (1024) loop4: detected capacity change from 0 to 4 EXT4-fs (loop4): fragment/cluster size (16384) != block size (1024) 9pnet_fd: p9_fd_create_tcp (5140): problem connecting socket to 127.0.0.1 program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO loop4: detected capacity change from 0 to 4 EXT4-fs (loop4): fragment/cluster size (16384) != block size (1024) 9pnet_fd: p9_fd_create_tcp (5160): problem connecting socket to 127.0.0.1 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 Bluetooth: hci6: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci6: Injecting HCI hardware error event Bluetooth: hci6: hardware error 0x00