WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.0/4324 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.0/4324: #0: ffff88800f8223f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88803438c698 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f826950 (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: 1 UID: 0 PID: 4324 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260115 #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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb743d57427 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:00007ffc2c393168 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb743d57427 RDX: 00007ffc2c393247 RSI: 00007fb743db2019 RDI: 00007ffc2c393230 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc2c393000 R10: 00007ffc2c392eb7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc2c393230 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/4324 Modules linked in: CPU: 1 UID: 0 PID: 4324 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260115 #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 Bluetooth: hci6: Controller not accepting commands anymore: ncmd = 0 RSP: 0018:ffff88804b24f9a0 EFLAGS: 00010286 Bluetooth: hci6: Injecting HCI hardware error event RAX: 00000000ffffffff RBX: ffff88804b4a1b80 RCX: ffffffff815660f7 Bluetooth: hci6: hardware error 0x00 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88804b4a1f7c RBP: ffff88804b4a1b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804b4a1b80 R13: 0000000000000001 R14: ffffffff85c10b20 R15: ffff8880341f1fb0 FS: 000055555f736400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb743dd7540 CR3: 000000000bbc8000 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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb743d57427 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:00007ffc2c393168 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb743d57427 RDX: 00007ffc2c393247 RSI: 00007fb743db2019 RDI: 00007ffc2c393230 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc2c393000 R10: 00007ffc2c392eb7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc2c393230 irq event stamp: 187 hardirqs last enabled at (187): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (185): [] handle_softirqs+0x65e/0x7d0 softirqs last enabled at (186): [] __irq_exit_rcu+0xc4/0x100 softirqs last disabled at (177): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- syz-executor.2 calls setitimer() with new_value NULL pointer. Misfeature support will be removed ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= Bluetooth: hci2: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci2: Injecting HCI hardware error event Bluetooth: hci2: hardware error 0x00 Process accounting resumed loop7: detected capacity change from 0 to 1024 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. Process accounting resumed loop2: detected capacity change from 0 to 512 EXT4-fs error (device loop2): ext4_orphan_get:1417: comm syz-executor.2: bad orphan inode 149 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. netlink: 200 bytes leftover after parsing attributes in process `syz-executor.2'. Bluetooth: hci6: Opcode 0x0c03 failed: -110 loop5: detected capacity change from 0 to 4 Bluetooth: hci2: Opcode 0x0c03 failed: -110 EXT4-fs (loop5): VFS: Found ext4 filesystem with unknown checksum algorithm. loop5: detected capacity change from 0 to 4 EXT4-fs (loop5): VFS: Found ext4 filesystem with unknown checksum algorithm. syz-executor.6 (4517) used greatest stack depth: 24048 bytes left SELinux: Context system_u: is not valid (left unmapped). UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. loop3: detected capacity change from 0 to 64 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. loop5: detected capacity change from 0 to 64 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop1: detected capacity change from 0 to 64 FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. audit: type=1326 audit(1768471169.650:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4727 comm="syz-executor.0" exe="/syz-executor.0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fb743d57b19 code=0x7ffc0000 EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. audit: type=1326 audit(1768471169.657:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4727 comm="syz-executor.0" exe="/syz-executor.0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fb743d57b19 code=0x7ffc0000 audit: type=1326 audit(1768471169.657:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4727 comm="syz-executor.0" exe="/syz-executor.0" sig=0 arch=c000003e syscall=298 compat=0 ip=0x7fb743d57b19 code=0x7ffc0000 audit: type=1326 audit(1768471169.658:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4727 comm="syz-executor.0" exe="/syz-executor.0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fb743d57b19 code=0x7ffc0000 audit: type=1326 audit(1768471169.658:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4727 comm="syz-executor.0" exe="/syz-executor.0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fb743d57b19 code=0x7ffc0000 audit: type=1326 audit(1768471169.659:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4727 comm="syz-executor.0" exe="/syz-executor.0" sig=0 arch=c000003e syscall=123 compat=0 ip=0x7fb743d57b19 code=0x7ffc0000 audit: type=1326 audit(1768471169.659:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4727 comm="syz-executor.0" exe="/syz-executor.0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fb743d57b19 code=0x7ffc0000 audit: type=1326 audit(1768471169.661:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4727 comm="syz-executor.0" exe="/syz-executor.0" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7fb743d57b19 code=0x7ffc0000 audit: type=1326 audit(1768471169.678:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4727 comm="syz-executor.0" exe="/syz-executor.0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fb743d57b19 code=0x7ffc0000 audit: type=1326 audit(1768471169.678:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4727 comm="syz-executor.0" exe="/syz-executor.0" sig=0 arch=c000003e syscall=298 compat=0 ip=0x7fb743d57b19 code=0x7ffc0000 Bluetooth: hci0: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci0: Injecting HCI hardware error event Bluetooth: hci0: hardware error 0x00