===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.5/285 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.5/285: #0: ffff88800a4363f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801ae1d9a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f952950 (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: 285 Comm: syz-executor.5 Not tainted 6.19.0-rc5-next-20260113 #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 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2ccdac5c27 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:00007ffcd66a3678 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcd66a3700 RCX: 00007f2ccdac5c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffcd66a3700 RBP: 00007ffcd66a36dc R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffcd66a3416 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000026320 R14: 0000000000000003 R15: 00007ffcd66a3740 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.5/285 Modules linked in: CPU: 0 UID: 0 PID: 285 Comm: syz-executor.5 Not tainted 6.19.0-rc5-next-20260113 #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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff8880221b79e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800b5b1b80 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88800b5b1f7c RBP: ffff88800b5b1b80 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800b5b1b80 R13: 0000000000000001 R14: ffffffff85c0e910 R15: ffff88804ad70ca0 FS: 000055558b391400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d322000 CR3: 000000001d3f7000 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 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2ccdac5c27 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:00007ffcd66a3678 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcd66a3700 RCX: 00007f2ccdac5c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffcd66a3700 RBP: 00007ffcd66a36dc R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffcd66a3416 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000026320 R14: 0000000000000003 R15: 00007ffcd66a3740 irq event stamp: 532879 hardirqs last enabled at (532879): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (532878): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (532874): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (532872): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1326 audit(1768297507.660:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=6124 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7ffad9722b19 code=0x0 audit: type=1326 audit(1768297508.499:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=6124 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7ffad9722b19 code=0x0 sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. Option 'fGWJ鬄iRgu銴' to dns_resolver key: bad/missing value Option 'fGWJ鬄iRgu銴' to dns_resolver key: bad/missing value Option 'fGWJ鬄iRgu銴' to dns_resolver key: bad/missing value tmpfs: Bad value for 'nr_inodes' tmpfs: Bad value for 'nr_inodes' Option 'fGWJ鬄iRgu銴' to dns_resolver key: bad/missing value tmpfs: Invalid gid '0x00000000ffffffff' Option 'fGWJ鬄iRgu銴' to dns_resolver key: bad/missing value msdos: Bad value for 'uid' msdos: Bad value for 'uid' msdos: Bad value for 'uid' msdos: Bad value for 'uid' netlink: 340 bytes leftover after parsing attributes in process `syz-executor.2'. ieee802154 phy0 wpan0: encryption failed: -22 EXT4-fs: test_dummy_encryption option not supported EXT4-fs: test_dummy_encryption option not supported EXT4-fs: Invalid want_extra_isize 0 EXT4-fs: Invalid want_extra_isize 0 syz-executor.7 (7772) used greatest stack depth: 24120 bytes left process 'syz-executor.2' launched './file1' with NULL argv: empty string added Zero length message leads to an empty skb syz-executor.7 (8051) used greatest stack depth: 23480 bytes left sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2087 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2087 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2087 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2087 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 program syz-executor.2 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.2 is using a deprecated SCSI ioctl, please convert it to SG_IO