===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.1/4008 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.1/4008: #0: ffff88800f8c63f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880327bd020 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f90a950 (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: 4008 Comm: syz-executor.1 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: 0033:0x7f0aaf4c4427 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:00007ffcb083df18 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0aaf4c4427 RDX: 00007ffcb083dff7 RSI: 00007f0aaf51f019 RDI: 00007ffcb083dfe0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcb083ddb0 R10: 00007ffcb083dc67 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcb083dfe0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.1/4008 Modules linked in: CPU: 0 UID: 0 PID: 4008 Comm: syz-executor.1 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 RSP: 0018:ffff88804c17f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888016933700 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888016933afc RBP: ffff888016933700 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888016933700 R13: 0000000000000001 R14: ffffffff85c10530 R15: ffff888032798318 FS: 0000555583e78400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0aaf544541 CR3: 0000000050c8f000 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: 0033:0x7f0aaf4c4427 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:00007ffcb083df18 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0aaf4c4427 RDX: 00007ffcb083dff7 RSI: 00007f0aaf51f019 RDI: 00007ffcb083dfe0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcb083ddb0 R10: 00007ffcb083dc67 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcb083dfe0 irq event stamp: 177 hardirqs last enabled at (177): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (176): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (170): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (168): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop1: detected capacity change from 0 to 320 ISO 9660 Extensions: Microsoft Joliet Level 3 ISO 9660 Extensions: RRIP_1991A audit: type=1400 audit(1768465049.668:10): avc: denied { block_suspend } for pid=4048 comm="syz-executor.3" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 audit: type=1400 audit(1768465050.566:11): avc: denied { tracepoint } for pid=4138 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 loop4: detected capacity change from 0 to 64 FAT-fs (loop4): bogus number of FAT structure FAT-fs (loop4): Can't find a valid FAT filesystem loop4: detected capacity change from 0 to 64 FAT-fs (loop4): bogus number of FAT structure FAT-fs (loop4): Can't find a valid FAT filesystem loop4: detected capacity change from 0 to 64 FAT-fs (loop4): bogus number of FAT structure FAT-fs (loop4): Can't find a valid FAT filesystem loop4: detected capacity change from 0 to 64 FAT-fs (loop4): bogus number of FAT structure FAT-fs (loop4): Can't find a valid FAT filesystem loop2: detected capacity change from 0 to 64 FAT-fs (loop2): bogus number of FAT structure FAT-fs (loop2): Can't find a valid FAT filesystem loop5: detected capacity change from 0 to 64 loop0: detected capacity change from 0 to 64 FAT-fs (loop0): bogus number of FAT structure FAT-fs (loop0): Can't find a valid FAT filesystem loop4: detected capacity change from 0 to 64 FAT-fs (loop5): bogus number of FAT structure FAT-fs (loop4): bogus number of FAT structure FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop4): Can't find a valid FAT filesystem loop2: detected capacity change from 0 to 64 FAT-fs (loop2): bogus number of FAT structure FAT-fs (loop2): Can't find a valid FAT filesystem FAT-fs (loop2): bogus number of FAT structure FAT-fs (loop2): Can't find a valid FAT filesystem audit: type=1400 audit(1768465051.375:12): avc: denied { read } for pid=4226 comm="syz-executor.2" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 FAT-fs (loop5): bogus number of FAT structure FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list FAT-fs (loop0): bogus number of FAT structure FAT-fs (loop0): Can't find a valid FAT filesystem FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): bogus number of FAT structure FAT-fs (loop0): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of FAT structure FAT-fs (loop5): Can't find a valid FAT filesystem FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) audit: type=1326 audit(1768465052.622:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4386 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fdd5e406b19 code=0x0 syz-executor.3 (4401) used greatest stack depth: 23832 bytes left audit: type=1326 audit(1768465052.778:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4404 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fdd5e406b19 code=0x0 audit: type=1326 audit(1768465052.920:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4431 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fdd5e406b19 code=0x0 EXT4-fs error (device loop1): __ext4_fill_super:5560: inode #2: comm syz-executor.1: iget: bogus i_mode (101) EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed EXT4-fs error (device loop1): __ext4_fill_super:5560: inode #2: comm syz-executor.1: iget: bogus i_mode (101) EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed Bluetooth: hci0: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci0: Injecting HCI hardware error event Bluetooth: hci0: hardware error 0x00 Bluetooth: hci2: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci2: Injecting HCI hardware error event Bluetooth: hci1: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci5: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci1: Injecting HCI hardware error event Bluetooth: hci5: Injecting HCI hardware error event Bluetooth: hci4: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci6: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci4: Injecting HCI hardware error event Bluetooth: hci6: Injecting HCI hardware error event Bluetooth: hci1: hardware error 0x00 Bluetooth: hci5: hardware error 0x00 Bluetooth: hci4: hardware error 0x00 Bluetooth: hci6: hardware error 0x00 Bluetooth: hci2: hardware error 0x00 Bluetooth: hci7: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci7: Injecting HCI hardware error event Bluetooth: hci7: hardware error 0x00 Bluetooth: hci3: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci3: Injecting HCI hardware error event Bluetooth: hci3: hardware error 0x00 Bluetooth: hci0: Opcode 0x0c03 failed: -110 Bluetooth: hci2: Opcode 0x0c03 failed: -110 Bluetooth: hci4: Opcode 0x0c03 failed: -110 Bluetooth: hci5: Opcode 0x0c03 failed: -110 Bluetooth: hci6: Opcode 0x0c03 failed: -110 Bluetooth: hci1: Opcode 0x0c03 failed: -110 Bluetooth: hci7: Opcode 0x0c03 failed: -110 Bluetooth: hci3: Opcode 0x0c03 failed: -110 audit: type=1326 audit(1768465056.292:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4476 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fdd5e406b19 code=0x0 set_capacity_and_notify: 17 callbacks suppressed loop1: detected capacity change from 0 to 2048 EXT4-fs error (device loop1): __ext4_fill_super:5560: inode #2: comm syz-executor.1: iget: bogus i_mode (101) EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed loop1: detected capacity change from 0 to 2048 EXT4-fs error (device loop1): __ext4_fill_super:5560: inode #2: comm syz-executor.1: iget: bogus i_mode (101) EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed loop1: detected capacity change from 0 to 2048 EXT4-fs error (device loop1): __ext4_fill_super:5560: inode #2: comm syz-executor.1: iget: bogus i_mode (101) EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed