===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.4/283 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.4/283: #0: ffff88800f65e3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801b9303e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f692950 (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: 283 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260116 #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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f90acf9ec27 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 53 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:00007ffc08f18928 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc08f189b0 RCX: 00007f90acf9ec27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc08f189b0 RBP: 00007ffc08f1898c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffc08f186c6 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000001e1f7 R14: 0000000000000002 R15: 00007ffc08f189f0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.4/283 Modules linked in: CPU: 0 UID: 0 PID: 283 Comm: syz-executor.4 Not tainted 6.19.0-rc5-next-20260116 #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:ffff88801abff9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888015d51b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888015d51f7c RBP: ffff888015d51b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888015d51b80 R13: 0000000000000001 R14: ffffffff85c0ef50 R15: ffff88801fdebc48 FS: 000055557e06f400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ce22000 CR3: 000000000dc9c000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f90acf9ec27 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 53 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:00007ffc08f18928 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc08f189b0 RCX: 00007f90acf9ec27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffc08f189b0 RBP: 00007ffc08f1898c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffc08f186c6 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000001e1f7 R14: 0000000000000002 R15: 00007ffc08f189f0 irq event stamp: 261753 hardirqs last enabled at (261753): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (261752): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (261748): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (261746): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- autofs4:pid:4351:check_dev_ioctl_version: ioctl control interface version mismatch: kernel(1.1), user(1.2), cmd(0xc0189377) autofs4:pid:4351:validate_dev_ioctl: invalid device control module version supplied for cmd(0xc0189377) autofs4:pid:4367:check_dev_ioctl_version: ioctl control interface version mismatch: kernel(1.1), user(1.2), cmd(0xc0189377) autofs4:pid:4367:validate_dev_ioctl: invalid device control module version supplied for cmd(0xc0189377) sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 autofs4:pid:4385:check_dev_ioctl_version: ioctl control interface version mismatch: kernel(1.1), user(1.2), cmd(0xc0189377) autofs4:pid:4385:validate_dev_ioctl: invalid device control module version supplied for cmd(0xc0189377) loop0: detected capacity change from 0 to 1352 loop0: detected capacity change from 0 to 1352 loop0: detected capacity change from 0 to 1352 syz-executor.7 (4480) used greatest stack depth: 22960 bytes left tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' loop3: detected capacity change from 0 to 512 EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. tmpfs: Bad value for 'mpol' loop3: detected capacity change from 0 to 512 workqueue: Failed to create a rescuer kthread for wq "ext4-rsv-conversion": -EINTR EXT4-fs: failed to create workqueue EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop3: detected capacity change from 0 to 512 tmpfs: Bad value for 'mpol' EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop3: detected capacity change from 0 to 512 tmpfs: Bad value for 'mpol' EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. ALSA: seq fatal error: cannot create timer (-22) tmpfs: Bad value for 'mpol' SELinux: Context system_u:object_r:apt_lock_ is not valid (left unmapped). ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) audit: type=1326 audit(1768574021.323:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4713 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f95e3789b19 code=0x0 audit: type=1326 audit(1768574022.158:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4713 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f95e3789b19 code=0x0 audit: type=1326 audit(1768574022.308:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4749 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f95e3789b19 code=0x0