===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.7/4251 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.7/4251: #0: ffff88800f7fe3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b866cb8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff888009e1a950 (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: 4251 Comm: syz-executor.7 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: 0033:0x7f5fcd966427 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:00007ffd48d93558 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5fcd966427 RDX: 00007ffd48d93633 RSI: 00007f5fcd9c102f RDI: 00007ffd48d93620 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd48d933f0 R10: 00007ffd48d932a7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd48d93620 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.7/4251 Modules linked in: CPU: 1 UID: 0 PID: 4251 Comm: syz-executor.7 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:ffff88804aacf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800dae1b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88800dae1f7c RBP: ffff88800dae1b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800dae1b80 R13: 0000000000000001 R14: ffffffff85c0dfb0 R15: ffff88804959bc48 FS: 0000555584b34400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555557f07708 CR3: 000000001d008000 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: 0033:0x7f5fcd966427 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:00007ffd48d93558 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5fcd966427 RDX: 00007ffd48d93633 RSI: 00007f5fcd9c102f RDI: 00007ffd48d93620 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd48d933f0 R10: 00007ffd48d932a7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd48d93620 irq event stamp: 461 hardirqs last enabled at (461): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (460): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (456): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (454): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop0: detected capacity change from 0 to 16 EXT4-fs (loop0): bad geometry: first data block 0 is beyond end of filesystem (0) loop0: detected capacity change from 0 to 16 EXT4-fs (loop0): bad geometry: first data block 0 is beyond end of filesystem (0) loop6: detected capacity change from 0 to 5 EXT4-fs (loop6): filesystem too large to mount safely on this system loop6: detected capacity change from 0 to 5 EXT4-fs (loop6): filesystem too large to mount safely on this system syz-executor.5 (4292) used greatest stack depth: 23800 bytes left kernel read not supported for file /vga_arbiter (pid: 61 comm: kworker/0:2) kernel read not supported for file /vga_arbiter (pid: 11 comm: kworker/0:1) netlink: 'syz-executor.4': attribute type 1 has an invalid length. kernel read not supported for file /vga_arbiter (pid: 11 comm: kworker/0:1) kernel read not supported for file /vga_arbiter (pid: 61 comm: kworker/0:2) kernel read not supported for file /vga_arbiter (pid: 23 comm: kworker/1:0) audit: type=1400 audit(1768468971.795:11): avc: denied { block_suspend } for pid=4418 comm="syz-executor.1" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 loop7: detected capacity change from 0 to 512 EXT4-fs error (device loop7): __ext4_fill_super:5560: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed loop7: detected capacity change from 0 to 512 EXT4-fs error (device loop7): __ext4_fill_super:5560: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed loop3: detected capacity change from 0 to 4 EXT4-fs (loop3): Invalid log block size: 11 loop3: detected capacity change from 0 to 4 EXT4-fs (loop3): Invalid log block size: 11 loop3: detected capacity change from 0 to 4 EXT4-fs (loop3): Invalid log block size: 11 loop3: detected capacity change from 0 to 4 EXT4-fs (loop3): Invalid log block size: 11 UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list serio: Serial port ptm0 audit: type=1400 audit(1768468978.171:12): avc: denied { write } for pid=4760 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1