===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.4/4262 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.4/4262: #0: ffff88800ffea3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88803c4b8d68 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800ffee950 (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: 4262 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260113 #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+0x406/0xb40 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: 0033:0x7fc9e5c07427 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:00007ffe3d05b008 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc9e5c07427 RDX: 00007ffe3d05b0e7 RSI: 00007fc9e5c62019 RDI: 00007ffe3d05b0d0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe3d05aea0 R10: 00007ffe3d05ad57 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe3d05b0d0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.4/4262 Modules linked in: CPU: 1 UID: 0 PID: 4262 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260113 #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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff88804b0d79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801ad7d280 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801ad7d67c RBP: ffff88801ad7d280 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801ad7d280 R13: 0000000000000001 R14: ffffffff85c0e690 R15: ffff88803c4258e0 FS: 000055558a1e5400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc9e5c87544 CR3: 000000004b7f6000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x406/0xb40 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: 0033:0x7fc9e5c07427 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:00007ffe3d05b008 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc9e5c07427 RDX: 00007ffe3d05b0e7 RSI: 00007fc9e5c62019 RDI: 00007ffe3d05b0d0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe3d05aea0 R10: 00007ffe3d05ad57 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe3d05b0d0 irq event stamp: 179 hardirqs last enabled at (179): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (178): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (174): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (172): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- sg_write: data in/out 235/12 bytes for SCSI command 0x1f-- guessing data in; program syz-executor.2 not setting count and/or reply_len properly sg_write: data in/out 235/12 bytes for SCSI command 0x1f-- guessing data in; program syz-executor.2 not setting count and/or reply_len properly faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption syz-executor.2 (4299) used greatest stack depth: 22896 bytes left faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption audit: type=1326 audit(1768298277.195:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4350 comm="syz-executor.5" exe="/syz-executor.5" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f57f7da0b19 code=0x0 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption audit: type=1326 audit(1768298278.023:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4350 comm="syz-executor.5" exe="/syz-executor.5" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f57f7da0b19 code=0x0 audit: type=1326 audit(1768298278.139:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4399 comm="syz-executor.5" exe="/syz-executor.5" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f57f7da0b19 code=0x0 audit: type=1326 audit(1768298279.066:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4432 comm="syz-executor.5" exe="/syz-executor.5" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f57f7da0b19 code=0x0 Bluetooth: hci0: Opcode 0x0401 failed: -4 audit: type=1326 audit(1768298280.183:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4482 comm="syz-executor.5" exe="/syz-executor.5" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7f57f7da0b19 code=0x0 Bluetooth: unknown link type 6 Bluetooth: hci1: connection err: -111 Bluetooth: Unexpected continuation frame (len 16) Bluetooth: unknown link type 6 Bluetooth: hci1: connection err: -111 Bluetooth: Unexpected start frame (len 10) Bluetooth: unknown link type 6 Bluetooth: hci1: connection err: -111 Bluetooth: Unexpected start frame (len 10) Bluetooth: unknown link type 6 Bluetooth: hci1: connection err: -111 Bluetooth: Unexpected start frame (len 10) Bluetooth: hci0: command 0x0401 tx timeout Bluetooth: unknown link type 6 Bluetooth: hci1: connection err: -111 Bluetooth: Unexpected start frame (len 10) program syz-executor.1 is using a deprecated SCSI ioctl, please convert it to SG_IO 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 mmap: syz-executor.7 (4705) 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 loop7: detected capacity change from 0 to 64 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO 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 program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO loop7: detected capacity change from 0 to 64 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) Bluetooth: hci1: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci1: Injecting HCI hardware error event Bluetooth: hci1: hardware error 0x00 loop7: detected capacity change from 0 to 64 program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO syz-executor.4 uses obsolete (PF_INET,SOCK_PACKET) netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. loop7: detected capacity change from 0 to 64 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) tmpfs: Unknown parameter './file0/file0'