loop1: detected capacity change from 0 to 16383 EXT4-fs (loop1): ext4_check_descriptors: Inode bitmap for group 0 not in group (block 1283)! EXT4-fs (loop1): group descriptors corrupted! ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.3/3898 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.3/3898: #0: ffff88800f8e23f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804a0503e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f8e6950 (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: 3898 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: 0033:0x7fef918b7427 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:00007ffcc5e4d4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fef918b7427 RDX: 00007ffcc5e4d5b7 RSI: 00007fef91912019 RDI: 00007ffcc5e4d5a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcc5e4d370 R10: 00007ffcc5e4d227 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcc5e4d5a0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.3/3898 Modules linked in: CPU: 1 UID: 0 PID: 3898 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:ffff88801a80f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b1d3700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801b1d3afc RBP: ffff88801b1d3700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b1d3700 R13: 0000000000000001 R14: ffffffff85c0dc40 R15: ffff8880095c9fb0 FS: 0000555570f3c400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fef91937543 CR3: 000000000d9b6000 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: 0033:0x7fef918b7427 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:00007ffcc5e4d4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fef918b7427 RDX: 00007ffcc5e4d5b7 RSI: 00007fef91912019 RDI: 00007ffcc5e4d5a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcc5e4d370 R10: 00007ffcc5e4d227 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcc5e4d5a0 irq event stamp: 493 hardirqs last enabled at (493): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (492): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (488): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (486): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 ieee80211 phy17: Selected rate control algorithm 'minstrel_ht' loop1: detected capacity change from 0 to 147456 EXT4-fs (loop1): VFS: Can't find ext4 filesystem wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 loop1: detected capacity change from 0 to 147456 loop5: detected capacity change from 0 to 16383 EXT4-fs (loop1): VFS: Can't find ext4 filesystem EXT4-fs warning (device loop5): ext4_multi_mount_protect:288: Invalid MMP block in superblock loop5: detected capacity change from 0 to 16383 EXT4-fs warning (device loop5): ext4_multi_mount_protect:288: Invalid MMP block in superblock loop6: detected capacity change from 0 to 512 EXT4-fs (loop6): warning: mounting unchecked fs, running e2fsck is recommended EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci7: ACL packet too small Bluetooth: hci7: ACL packet too small audit: type=1400 audit(1768557010.426:10): avc: denied { write } for pid=3953 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 loop6: detected capacity change from 0 to 512 9pnet_fd: Insufficient options for proto=fd EXT4-fs (loop6): warning: mounting unchecked fs, running e2fsck is recommended EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000.