loop7: detected capacity change from 0 to 68 FAT-fs (loop7): error, corrupted directory (invalid entries) FAT-fs (loop7): Filesystem has been set read-only ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.3/4293 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.3/4293: #0: ffff88800f5e83f8 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1764/0x2d60 #1: ffff88804999b388 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: path_openat+0xe32/0x2d60 #2: ffff88800f5ec950 (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: 4293 Comm: syz-executor.3 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_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_openat+0x142/0x200 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f94b2ddfb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f94b0355188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f94b2ef2f60 RCX: 00007f94b2ddfb19 RDX: 0000000000000042 RSI: 0000000020000180 RDI: ffffffffffffff9c RBP: 00007f94b2e39f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffed3d03dcf R14: 00007f94b0355300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.3/4293 Modules linked in: CPU: 0 UID: 0 PID: 4293 Comm: syz-executor.3 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:ffff88804cf874f8 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880493a9b80 RCX: ffffc90000809000 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff8880493a9f7c RBP: ffff8880493a9b80 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880493a9b80 R13: 0000000000000001 R14: ffffffff85c10a30 R15: ffff88801a8c6bf0 FS: 00007f94b0355700(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f94b2ef3018 CR3: 000000000f9ea000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_openat+0x142/0x200 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f94b2ddfb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f94b0355188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f94b2ef2f60 RCX: 00007f94b2ddfb19 RDX: 0000000000000042 RSI: 0000000020000180 RDI: ffffffffffffff9c RBP: 00007f94b2e39f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffed3d03dcf R14: 00007f94b0355300 R15: 0000000000022000 irq event stamp: 73 hardirqs last enabled at (73): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (72): [] common_interrupt+0x1d/0xd0 softirqs last enabled at (66): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (64): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- netlink: 'syz-executor.3': attribute type 4 has an invalid length. netlink: 'syz-executor.3': attribute type 4 has an invalid length. loop7: detected capacity change from 0 to 68 FAT-fs (loop7): error, corrupted directory (invalid entries) FAT-fs (loop7): Filesystem has been set read-only netlink: 'syz-executor.4': attribute type 4 has an invalid length. loop4: detected capacity change from 0 to 1024 loop0: detected capacity change from 0 to 79 msdos: Invalid gid '0x00000000ffffffff' EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. netlink: 'syz-executor.4': attribute type 4 has an invalid length. loop7: detected capacity change from 0 to 68 FAT-fs (loop7): error, corrupted directory (invalid entries) FAT-fs (loop7): Filesystem has been set read-only EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 79 msdos: Invalid gid '0x00000000ffffffff' FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) EXT4-fs warning (device sda): verify_group_input:158: Reserved blocks too high (65534) loop7: detected capacity change from 0 to 68 audit: type=1400 audit(1768456920.699:12): avc: denied { write } for pid=4362 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 EXT4-fs warning (device sda): verify_group_input:158: Reserved blocks too high (65534) loop0: detected capacity change from 0 to 79 msdos: Invalid gid '0x00000000ffffffff' Bluetooth: hci0: Opcode 0x0c1a failed: -4 Bluetooth: hci0: Opcode 0x0406 failed: -4 FAT-fs (loop7): error, invalid access to FAT (entry 0x000000ff) Bluetooth: hci0: Opcode 0x0406 failed: -4 FAT-fs (loop7): Filesystem has been set read-only loop6: detected capacity change from 0 to 79 msdos: Invalid gid '0x00000000ffffffff' FAT-fs (loop7): error, corrupted directory (invalid entries) Bluetooth: hci2: Opcode 0x0c1a failed: -4 Bluetooth: hci2: Opcode 0x0406 failed: -4 syz-executor.3 (4365) used greatest stack depth: 24240 bytes left Bluetooth: hci2: Opcode 0x0406 failed: -4 audit: type=1400 audit(1768456920.936:13): avc: denied { read } for pid=4380 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 Bluetooth: hci1: Opcode 0x0c1a failed: -4 Bluetooth: hci1: Opcode 0x0406 failed: -4 loop1: detected capacity change from 0 to 264192 Bluetooth: hci1: 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: hci7: Opcode 0x0c1a failed: -4 Bluetooth: hci7: Opcode 0x0406 failed: -4 Bluetooth: hci7: Opcode 0x0406 failed: -4 loop6: detected capacity change from 0 to 79 msdos: Invalid gid '0x00000000ffffffff' Bluetooth: hci6: Opcode 0x0c1a failed: -4 Bluetooth: hci6: Opcode 0x0406 failed: -4 Bluetooth: hci6: Opcode 0x0406 failed: -4 Bluetooth: hci5: Opcode 0x0c1a failed: -4