===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.3/5025 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.3/5025: #0: ffff88800f7ee3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88803a265020 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f81a950 (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: 5025 Comm: syz-executor.3 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_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fda3391e427 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:00007ffc474f1a58 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fda3391e427 RDX: 00007ffc474f1b33 RSI: 00007fda33979022 RDI: 00007ffc474f1b20 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc474f18f0 R10: 00007ffc474f17a7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc474f1b20 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.3/5025 Modules linked in: CPU: 0 UID: 0 PID: 5025 Comm: syz-executor.3 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:ffff888047fd79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801696b700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801696bafc RBP: ffff88801696b700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801696b700 R13: 0000000000000001 R14: ffffffff85c0ed70 R15: ffff88803a28b2c0 FS: 000055556a169400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555592cc3c58 CR3: 000000004c44e000 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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fda3391e427 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:00007ffc474f1a58 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fda3391e427 RDX: 00007ffc474f1b33 RSI: 00007fda33979022 RDI: 00007ffc474f1b20 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc474f18f0 R10: 00007ffc474f17a7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc474f1b20 irq event stamp: 299 hardirqs last enabled at (299): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (298): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (294): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (292): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- syz-executor.4 uses obsolete (PF_INET,SOCK_PACKET) audit: type=1400 audit(1768464767.239:14): avc: denied { module_load } for pid=5407 comm="syz-executor.5" path="/syz-executor.5" dev="sda" ino=15934 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=system permissive=1 Invalid ELF header type: 3 != 1 Invalid ELF header type: 3 != 1 Invalid ELF header type: 3 != 1 Invalid ELF header type: 3 != 1 Invalid ELF header type: 3 != 1 Invalid ELF header type: 3 != 1 Invalid ELF header type: 3 != 1 audit: type=1400 audit(1768464768.232:15): avc: denied { watch_reads } for pid=5530 comm="syz-executor.0" path="/syzkaller-testdir524050481/syzkaller.ldqChO/91/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 tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' loop6: detected capacity change from 0 to 1294 syz-executor.7 (5692) used greatest stack depth: 24120 bytes left loop6: detected capacity change from 0 to 1294 loop6: detected capacity change from 0 to 1294 loop6: detected capacity change from 0 to 1294 loop3: detected capacity change from 0 to 16 EXT4-fs (loop3): #clusters per group too big: 32803 loop3: detected capacity change from 0 to 16 EXT4-fs (loop3): #clusters per group too big: 32803 loop3: detected capacity change from 0 to 16 EXT4-fs (loop3): #clusters per group too big: 32803 Bluetooth: hci3: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci3: ACL packet for unknown connection handle 2745 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: SCO packet for unknown connection handle 205 loop3: detected capacity change from 0 to 16 Bluetooth: hci3: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci3: ACL packet for unknown connection handle 2745 EXT4-fs (loop3): #clusters per group too big: 32803 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: SCO packet for unknown connection handle 205 loop3: detected capacity change from 0 to 16 EXT4-fs (loop3): #clusters per group too big: 32803 loop5: detected capacity change from 0 to 68 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): error, fat_free_clusters: deleting FAT entry beyond EOF FAT-fs (loop5): Filesystem has been set read-only FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop6): error, fat_free_clusters: deleting FAT entry beyond EOF FAT-fs (loop6): Filesystem has been set read-only Bluetooth: hci3: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci3: ACL packet for unknown connection handle 2745 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: SCO packet for unknown connection handle 205 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): error, fat_free_clusters: deleting FAT entry beyond EOF FAT-fs (loop5): Filesystem has been set read-only Bluetooth: hci3: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci3: ACL packet for unknown connection handle 2745 Bluetooth: hci3: ISO packet for unknown connection handle 1106 Bluetooth: hci3: ISO packet for unknown connection handle 1106 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) Bluetooth: hci3: SCO packet for unknown connection handle 205 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): error, fat_free_clusters: deleting FAT entry beyond EOF FAT-fs (loop5): Filesystem has been set read-only FAT-fs (loop6): error, fat_free_clusters: deleting FAT entry beyond EOF FAT-fs (loop6): Filesystem has been set read-only