===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.7/4220 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.7/4220: #0: ffff88800f9583f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a0fa078 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f95c950 (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: 4220 Comm: syz-executor.7 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_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: 0033:0x7fef67dc3427 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:00007fffe5a662a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fef67dc3427 RDX: 00007fffe5a66387 RSI: 00007fef67e1e019 RDI: 00007fffe5a66370 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fffe5a66140 R10: 00007fffe5a65ff7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fffe5a66370 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.7/4220 Modules linked in: CPU: 1 UID: 0 PID: 4220 Comm: syz-executor.7 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:ffff8880195979a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800bb71b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88800bb71f7c RBP: ffff88800bb71b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800bb71b80 R13: 0000000000000001 R14: ffffffff85c0cb10 R15: ffff88804a100318 FS: 0000555586fd2400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fef67e43547 CR3: 000000000ec01000 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: 0033:0x7fef67dc3427 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:00007fffe5a662a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fef67dc3427 RDX: 00007fffe5a66387 RSI: 00007fef67e1e019 RDI: 00007fffe5a66370 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fffe5a66140 R10: 00007fffe5a65ff7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fffe5a66370 irq event stamp: 239 hardirqs last enabled at (239): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (238): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (232): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (230): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. tmpfs: Unknown parameter 'nr_bl¸S`¾þxØr' loop4: detected capacity change from 0 to 4 loop5: detected capacity change from 0 to 1024 EXT4-fs (loop4): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop4): bad geometry: block count 128 exceeds size of device (1 blocks) cgroup: none used incorrectly EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. cgroup: none used incorrectly loop4: detected capacity change from 0 to 4 EXT4-fs (loop4): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop4): bad geometry: block count 128 exceeds size of device (1 blocks) audit: type=1400 audit(1768808342.866:37): avc: denied { watch_reads } for pid=4253 comm="syz-executor.1" path="/syzkaller-testdir269972424/syzkaller.HVjhb4/15/file0" dev="sda" ino=16024 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 loop7: detected capacity change from 0 to 64 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) Bluetooth: Frame is too long (len 18, expected len 4) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1400 audit(1768808343.120:38): avc: denied { watch } for pid=4284 comm="syz-executor.2" path="/proc/4284/task" dev="proc" ino=6544 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dir permissive=1 Bluetooth: Frame is too long (len 18, expected len 4) loop4: detected capacity change from 0 to 512 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs error (device loop4): __ext4_iget:5425: inode #12: block 2: comm syz-executor.4: invalid block EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000.