===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.0/279 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.0/279: #0: ffff88800a3f83f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801c174698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800a3fc950 (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: 279 Comm: syz-executor.0 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_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: 0033:0x7fb6054f1c27 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:00007ffd3e9f32b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd3e9f3340 RCX: 00007fb6054f1c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd3e9f3340 RBP: 00007ffd3e9f331c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffd3e9f3056 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000022e89 R14: 0000000000000007 R15: 00007ffd3e9f3380 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.0/279 Modules linked in: CPU: 0 UID: 0 PID: 279 Comm: syz-executor.0 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:ffff8880164779e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888016658000 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff8880166583fc RBP: ffff888016658000 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888016658000 R13: 0000000000000001 R14: ffffffff85c10030 R15: ffff888049d0e268 FS: 0000555580aa7400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ce23000 CR3: 000000000cdf3000 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: 0033:0x7fb6054f1c27 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:00007ffd3e9f32b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd3e9f3340 RCX: 00007fb6054f1c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd3e9f3340 RBP: 00007ffd3e9f331c R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffd3e9f3056 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000022e89 R14: 0000000000000007 R15: 00007ffd3e9f3380 irq event stamp: 223507 hardirqs last enabled at (223507): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (223506): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (223502): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (223500): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- FAT-fs (loop7): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. FAT-fs (loop5): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. FAT-fs (loop5): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. Bluetooth: hci6: Opcode 0x0c03 failed: -110 raw_sendmsg: syz-executor.1 forgot to set AF_INET. Fix it! 9pnet_fd: p9_fd_create_tcp (4289): problem connecting socket to 127.0.0.1 9pnet_fd: p9_fd_create_tcp (4289): problem connecting socket to 127.0.0.1 capability: warning: `syz-executor.0' uses 32-bit capabilities (legacy support in use) 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 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 audit: type=1400 audit(1768384292.546:12): avc: denied { watch_reads } for pid=4569 comm="syz-executor.3" path="/syzkaller-testdir110466464/syzkaller.dOQl9c/34/file0" dev="sda" ino=16000 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1 set_capacity_and_notify: 7 callbacks suppressed loop4: detected capacity change from 0 to 64 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop4: detected capacity change from 0 to 64 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop0: detected capacity change from 0 to 5 FAT-fs (loop0): Directory bread(block 5) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 5) failed FAT-fs (loop0): Directory bread(block 6) failed loop4: detected capacity change from 0 to 64 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 5 FAT-fs (loop5): Directory bread(block 5) failed FAT-fs (loop5): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 5) failed FAT-fs (loop5): Directory bread(block 6) failed loop0: detected capacity change from 0 to 5 loop4: detected capacity change from 0 to 64 FAT-fs (loop0): Directory bread(block 5) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 5) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 5 FAT-fs (loop5): Directory bread(block 5) failed FAT-fs (loop5): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 5) failed FAT-fs (loop5): Directory bread(block 6) failed loop0: detected capacity change from 0 to 5 FAT-fs (loop0): Directory bread(block 5) failed FAT-fs (loop0): Directory bread(block 6) failed loop5: detected capacity change from 0 to 5 FAT-fs (loop0): Directory bread(block 5) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 5) failed FAT-fs (loop5): Directory bread(block 6) failed FAT-fs (loop5): Directory bread(block 5) failed FAT-fs (loop5): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 5) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 5) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 6) failed FAT-fs (loop0): Directory bread(block 6) failed audit: type=1326 audit(1768384295.813:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4955 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fc9674d4b19 code=0x7ffc0000 audit: type=1326 audit(1768384295.815:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4955 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=83 compat=0 ip=0x7fc9674d3c27 code=0x7ffc0000 audit: type=1326 audit(1768384295.815:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4955 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=165 compat=0 ip=0x7fc9674d604a code=0x7ffc0000 audit: type=1326 audit(1768384295.821:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4955 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=257 compat=0 ip=0x7fc967487a04 code=0x7ffc0000 audit: type=1326 audit(1768384295.821:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4955 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fc9674d4b19 code=0x7ffc0000 audit: type=1326 audit(1768384295.821:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4955 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=433 compat=0 ip=0x7fc9674d4b19 code=0x7ffc0000 audit: type=1326 audit(1768384295.821:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4955 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fc9674d4b19 code=0x7ffc0000 audit: type=1326 audit(1768384295.821:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4955 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7fc9674d4b19 code=0x7ffc0000 audit: type=1326 audit(1768384295.827:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4955 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fc9674d4b19 code=0x7ffc0000 audit: type=1326 audit(1768384295.827:22): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4955 comm="syz-executor.7" exe="/syz-executor.7" sig=0 arch=c000003e syscall=83 compat=0 ip=0x7fc9674d3c27 code=0x7ffc0000 EXT4-fs warning (device sda): ext4_block_to_path:105: block 1768304430 > max in inode 16028 EXT4-fs warning (device sda): ext4_block_to_path:105: block 1768304430 > max in inode 16028 ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy0 wpan0: encryption failed: -22 set_capacity_and_notify: 2 callbacks suppressed loop2: detected capacity change from 0 to 640 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir094362578/syzkaller.wAEiKt/65/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop2: detected capacity change from 0 to 640 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir094362578/syzkaller.wAEiKt/66/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop2: detected capacity change from 0 to 640 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir094362578/syzkaller.wAEiKt/67/file0 supports timestamps until 2038-01-19 (0x7fffffff)