loop5: detected capacity change from 0 to 2560 ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.3/4724 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.3/4724: #0: ffff88800f7a03f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801d30c698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f7a4950 (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: 4724 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_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: 0033:0x7f7c6eb6d427 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:00007ffd9cf657f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7c6eb6d427 RDX: 00007ffd9cf658d3 RSI: 00007f7c6ebc8022 RDI: 00007ffd9cf658c0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd9cf65690 R10: 00007ffd9cf65547 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd9cf658c0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.3/4724 Modules linked in: CPU: 0 UID: 0 PID: 4724 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:ffff88801b3679a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804c8fb700 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88804c8fbafc RBP: ffff88804c8fb700 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804c8fb700 R13: 0000000000000001 R14: ffffffff85c0ea00 R15: ffff88801d26c5d0 FS: 00005555881a4400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7c6ebed543 CR3: 000000005397a000 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: 0033:0x7f7c6eb6d427 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:00007ffd9cf657f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7c6eb6d427 RDX: 00007ffd9cf658d3 RSI: 00007f7c6ebc8022 RDI: 00007ffd9cf658c0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd9cf65690 R10: 00007ffd9cf65547 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd9cf658c0 irq event stamp: 775 hardirqs last enabled at (775): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (774): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (770): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (768): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir330490575/syzkaller.lYS7yX/47/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 2560 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir330490575/syzkaller.lYS7yX/48/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. 9pnet: Limiting 'msize' to 1048576 as this is the maximum supported by transport fd loop5: detected capacity change from 0 to 2560 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir330490575/syzkaller.lYS7yX/49/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. 9pnet: Limiting 'msize' to 1048576 as this is the maximum supported by transport fd EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir330490575/syzkaller.lYS7yX/50/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. 9pnet: Limiting 'msize' to 1048576 as this is the maximum supported by transport fd 9pnet: Limiting 'msize' to 1048576 as this is the maximum supported by transport fd netlink: 'syz-executor.1': attribute type 1 has an invalid length. program syz-executor.7 is using a deprecated SCSI ioctl, please convert it to SG_IO netlink: 'syz-executor.1': attribute type 1 has an invalid length. program syz-executor.7 is using a deprecated SCSI ioctl, please convert it to SG_IO syz-executor.7 (5095) used greatest stack depth: 23544 bytes left netlink: 'syz-executor.1': attribute type 1 has an invalid length. program syz-executor.5 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.7 is using a deprecated SCSI ioctl, please convert it to SG_IO audit: type=1400 audit(1768381509.359:15): avc: denied { watch_reads } for pid=5145 comm="syz-executor.4" path="/syzkaller-testdir059668953/syzkaller.wt5H0e/64/file0" dev="tmpfs" ino=1 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir permissive=1 netlink: 'syz-executor.1': attribute type 1 has an invalid length. program syz-executor.5 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.7 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.7 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.5 is using a deprecated SCSI ioctl, please convert it to SG_IO set_capacity_and_notify: 1 callbacks suppressed loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 4728 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop5: detected capacity change from 0 to 4728 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop5: detected capacity change from 0 to 4728 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop5: detected capacity change from 0 to 4728 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop4: detected capacity change from 0 to 64 FAT-fs (loop4): bread failed, FSINFO block (sector = 69) loop4: detected capacity change from 0 to 64 FAT-fs (loop4): bread failed, FSINFO block (sector = 69) FAT-fs (loop4): bread failed, FSINFO block (sector = 69)