===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.4/4077 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.4/4077: #0: ffff88800f6ce3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a52b388 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f76a950 (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: 4077 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260114 #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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f43d7deb427 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:00007ffe99b9e938 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f43d7deb427 RDX: 00007ffe99b9ea13 RSI: 00007f43d7e4602f RDI: 00007ffe99b9ea00 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe99b9e7d0 R10: 00007ffe99b9e687 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe99b9ea00 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.4/4077 Modules linked in: CPU: 0 UID: 0 PID: 4077 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260114 #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 16 c0 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 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff88804b1579a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804b161b80 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88804b161f7c RBP: ffff88804b161b80 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804b161b80 R13: 0000000000000001 R14: ffffffff85c0f680 R15: ffff88801b393c48 FS: 000055558e7cc400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcde130ec8 CR3: 000000001bad2000 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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f43d7deb427 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:00007ffe99b9e938 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f43d7deb427 RDX: 00007ffe99b9ea13 RSI: 00007f43d7e4602f RDI: 00007ffe99b9ea00 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe99b9e7d0 R10: 00007ffe99b9e687 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffe99b9ea00 irq event stamp: 965 hardirqs last enabled at (965): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (964): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (960): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (958): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop6: detected capacity change from 0 to 6 FAT-fs (loop6): bogus number of FAT structure FAT-fs (loop6): Can't find a valid FAT filesystem loop6: detected capacity change from 0 to 6 FAT-fs (loop6): bogus number of FAT structure FAT-fs (loop6): Can't find a valid FAT filesystem Bluetooth: hci0: Opcode 0x0c1a failed: -4 Bluetooth: hci0: Opcode 0x0406 failed: -4 Bluetooth: hci0: Opcode 0x0406 failed: -4 Bluetooth: hci1: Opcode 0x0c1a failed: -4 Bluetooth: hci1: Opcode 0x0406 failed: -4 Bluetooth: hci1: Opcode 0x0406 failed: -4 Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci2: Opcode 0x0406 failed: -4 Bluetooth: hci2: Opcode 0x0406 failed: -4 Bluetooth: hci3: Opcode 0x0c1a failed: -4 Bluetooth: hci3: Opcode 0x0406 failed: -4 Bluetooth: hci3: Opcode 0x0406 failed: -4 Bluetooth: hci4: Opcode 0x0c1a failed: -4 Bluetooth: hci4: Opcode 0x0406 failed: -4 Bluetooth: hci4: Opcode 0x0406 failed: -4 Bluetooth: hci5: Opcode 0x0c1a failed: -4 Bluetooth: hci5: Opcode 0x0406 failed: -4 Bluetooth: hci5: Opcode 0x0406 failed: -4 Bluetooth: hci6: Opcode 0x0c1a failed: -4 Bluetooth: hci6: Opcode 0x0406 failed: -4 Bluetooth: hci6: Opcode 0x0406 failed: -4 Bluetooth: hci7: Opcode 0x0c1a failed: -4 Bluetooth: hci7: Opcode 0x0406 failed: -4 Bluetooth: hci7: Opcode 0x0406 failed: -4 Bluetooth: hci0: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci2: command 0x0c1a tx timeout Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci0: command 0x0c1a tx timeout Bluetooth: hci2: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout Bluetooth: hci0: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci2: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout FAT-fs (loop5): unable to read boot sector FAT-fs (loop5): unable to read boot sector loop2: detected capacity change from 0 to 2048 loop4: detected capacity change from 0 to 512 EXT4-fs error (device loop4): __ext4_fill_super:5560: inode #2: comm syz-executor.4: casefold flag without casefold feature EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed audit: type=1400 audit(1768436835.205:11): avc: denied { read } for pid=4126 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 audit: type=1400 audit(1768436835.206:12): avc: denied { write } for pid=4126 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 loop4: detected capacity change from 0 to 512 EXT4-fs error (device loop4): __ext4_fill_super:5560: inode #2: comm syz-executor.4: casefold flag without casefold feature EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed syz-executor.1 calls setitimer() with new_value NULL pointer. Misfeature support will be removed syz-executor.5 (4128) used greatest stack depth: 23344 bytes left EXT4-fs warning (device loop2): ext4_multi_mount_protect:328: MMP startup interrupted, failing mount