===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.0/4206 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.0/4206: #0: ffff88800f9323f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b0b6cb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f936950 (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: 4206 Comm: syz-executor.0 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: 0033:0x7fb397707427 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:00007ffcc2888978 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb397707427 RDX: ffffffffffffffbc RSI: 00007fb39776200e RDI: 00007fb3977611dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcc28883f0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcc2888a40 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/4206 Modules linked in: CPU: 1 UID: 0 PID: 4206 Comm: syz-executor.0 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:ffff88804d3bf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801aef1b80 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801aef1f7c RBP: ffff88801aef1b80 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801aef1b80 R13: 0000000000000001 R14: ffffffff85c0e780 R15: ffff88804e4445d0 FS: 0000555559667400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcc2887e18 CR3: 000000004cdec000 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: 0033:0x7fb397707427 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:00007ffcc2888978 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb397707427 RDX: ffffffffffffffbc RSI: 00007fb39776200e RDI: 00007fb3977611dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcc28883f0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcc2888a40 irq event stamp: 625 hardirqs last enabled at (625): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (624): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (620): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (618): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- 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 program syz-executor.6 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.6 is using a deprecated SCSI ioctl, please convert it to SG_IO loop1: detected capacity change from 0 to 16 EXT4-fs (loop1): bad geometry: first data block 0 is beyond end of filesystem (0) EXT4-fs (loop1): bad geometry: first data block 0 is beyond end of filesystem (0) program syz-executor.6 is using a deprecated SCSI ioctl, please convert it to SG_IO EXT4-fs (loop1): bad geometry: first data block 0 is beyond end of filesystem (0) program syz-executor.6 is using a deprecated SCSI ioctl, please convert it to SG_IO EXT4-fs (loop1): bad geometry: first data block 0 is beyond end of filesystem (0) program syz-executor.6 is using a deprecated SCSI ioctl, please convert it to SG_IO EXT4-fs (loop1): bad geometry: first data block 0 is beyond end of filesystem (0) netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.1'. UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list EXT4-fs (loop3): mounting ext2 file system using the ext4 subsystem EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. set_capacity_and_notify: 5 callbacks suppressed loop3: detected capacity change from 0 to 512 EXT4-fs (loop3): mounting ext2 file system using the ext4 subsystem syz-executor.6(4529): Attempt to set a LOCK_MAND lock via flock(2). This support has been removed and the request ignored. EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop3: detected capacity change from 0 to 512 EXT4-fs (loop3): mounting ext2 file system using the ext4 subsystem EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop3: detected capacity change from 0 to 512 netlink: 1000 bytes leftover after parsing attributes in process `syz-executor.0'. EXT4-fs (loop3): mounting ext2 file system using the ext4 subsystem netlink: 1000 bytes leftover after parsing attributes in process `syz-executor.0'. EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. netlink: 1000 bytes leftover after parsing attributes in process `syz-executor.0'. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. netlink: 1000 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 1000 bytes leftover after parsing attributes in process `syz-executor.0'. kauditd_printk_skb: 19 callbacks suppressed audit: type=1400 audit(1768293871.982:37): avc: denied { block_suspend } for pid=4665 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 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption audit: type=1400 audit(1768293872.135:38): avc: denied { watch_reads } for pid=4689 comm="syz-executor.6" path="/syzkaller-testdir611686997/syzkaller.AK5TJ7/43" dev="sda" ino=15984 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption loop0: detected capacity change from 0 to 192 syz-executor.4 (4683) used greatest stack depth: 22896 bytes left loop0: detected capacity change from 0 to 192 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 loop0: detected capacity change from 0 to 192 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 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption 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