===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.3/3991 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.3/3991: #0: ffff88800f4bc3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888048d483e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f7e0950 (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: 3991 Comm: syz-executor.3 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: 0033:0x7f3774192427 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:00007ffead07d678 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3774192427 RDX: 00007ffead07d757 RSI: 00007f37741ed019 RDI: 00007ffead07d740 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffead07d510 R10: 00007ffead07d3c7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffead07d740 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.3/3991 Modules linked in: CPU: 0 UID: 0 PID: 3991 Comm: syz-executor.3 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:ffff88806ce08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88801901d280 RCX: ffffffff81893bc4 RDX: 0000000000000000 RSI: ffffffff81893bdb RDI: ffff88801901d67c RBP: ffff88801901d280 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000000003ab R12: ffff88801901d280 R13: 0000000000000000 R14: ffff88806ce379c0 R15: ffff88806ce37a20 FS: 000055558d562400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3774212543 CR3: 0000000053447000 CR4: 0000000000350ef0 Call Trace: sched_tick+0x232/0x6e0 update_process_times+0x116/0x210 tick_nohz_handler+0x4ff/0x8c0 __hrtimer_run_queues+0x654/0xbb0 hrtimer_interrupt+0x369/0x830 __sysvec_apic_timer_interrupt+0xbb/0x300 sysvec_apic_timer_interrupt+0x6b/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:__sanitizer_cov_trace_cmp8+0x8/0x20 Code: 00 00 00 e9 da fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 <48> 89 f2 48 89 fe bf 06 00 00 00 e9 a8 fe ff ff 0f 1f 84 00 00 00 RSP: 0018:ffff888051f3f748 EFLAGS: 00000287 RAX: 0000000000000003 RBX: ffffffff8667ae80 RCX: ffffffff84c54bdf RDX: 0000000000000000 RSI: ffffffff81379c14 RDI: ffffffff815d742f RBP: ffffffff81379c14 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8137985b R11: 0000000000000000 R12: ffffffff815d742f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x4cf/0x5b0 report_bug+0x7c/0x120 handle_bug+0x2e8/0x4f0 exc_invalid_op+0x35/0x80 asm_exc_invalid_op+0x1a/0x20 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:ffff888051f3f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801901d280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88801901d67c RBP: ffff88801901d280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801901d280 R13: 0000000000000001 R14: ffffffff85c0ea50 R15: ffff888048d0e268 __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: 0033:0x7f3774192427 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:00007ffead07d678 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3774192427 RDX: 00007ffead07d757 RSI: 00007f37741ed019 RDI: 00007ffead07d740 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffead07d510 R10: 00007ffead07d3c7 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffead07d740 irq event stamp: 193 hardirqs last enabled at (193): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (191): [] handle_softirqs+0x65e/0x7d0 softirqs last enabled at (192): [] __irq_exit_rcu+0xc4/0x100 softirqs last disabled at (179): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. program syz-executor.1 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.1 is using a deprecated SCSI ioctl, please convert it to SG_IO Bluetooth: hci1: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci1: Injecting HCI hardware error event Bluetooth: hci1: hardware error 0x00 netlink: 32 bytes leftover after parsing attributes in process `syz-executor.2'. warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow capability: warning: `syz-executor.7' uses deprecated v2 capabilities in a way that may be insecure warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow audit: type=1400 audit(1768470382.661:10): avc: denied { tracepoint } for pid=4132 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow syz-executor.7 (4122) used greatest stack depth: 23792 bytes left warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. Bluetooth: hci1: Opcode 0x0c03 failed: -110 syz_tun: entered allmulticast mode syz_tun: entered promiscuous mode syz_tun: left promiscuous mode syz_tun: left allmulticast mode netlink: 'syz-executor.0': attribute type 9 has an invalid length. netlink: 'syz-executor.0': attribute type 9 has an invalid length. Zero length message leads to an empty skb audit: type=1400 audit(1768470385.123:11): avc: denied { write } for pid=4425 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 audit: type=1400 audit(1768470387.313:12): avc: denied { read } for pid=4601 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 audit: type=1400 audit(1768470388.452:13): avc: denied { watch watch_reads } for pid=4708 comm="syz-executor.7" path="/proc/4708/ns" dev="proc" ino=7907 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dir permissive=1 No source specified audit: type=1326 audit(1768470388.452:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4709 comm="syz-executor.6" exe="/syz-executor.6" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f8480eb7b19 code=0x7ffc0000 No source specified audit: type=1326 audit(1768470388.455:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4709 comm="syz-executor.6" exe="/syz-executor.6" sig=0 arch=c000003e syscall=186 compat=0 ip=0x7f8480eb7b19 code=0x7ffc0000 audit: type=1326 audit(1768470388.455:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4709 comm="syz-executor.6" exe="/syz-executor.6" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f8480eb7b19 code=0x7ffc0000 audit: type=1326 audit(1768470388.456:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4709 comm="syz-executor.6" exe="/syz-executor.6" sig=0 arch=c000003e syscall=129 compat=0 ip=0x7f8480eb7b19 code=0x7ffc0000 audit: type=1326 audit(1768470388.456:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4709 comm="syz-executor.6" exe="/syz-executor.6" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f8480eb7b19 code=0x7ffc0000 audit: type=1326 audit(1768470388.457:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4709 comm="syz-executor.6" exe="/syz-executor.6" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7f8480eb7b19 code=0x7ffc0000 audit: type=1326 audit(1768470388.462:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4709 comm="syz-executor.6" exe="/syz-executor.6" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f8480eb7b19 code=0x7ffc0000 audit: type=1326 audit(1768470388.462:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4709 comm="syz-executor.6" exe="/syz-executor.6" sig=0 arch=c000003e syscall=186 compat=0 ip=0x7f8480eb7b19 code=0x7ffc0000 UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list audit: type=1326 audit(1768470388.462:22): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4709 comm="syz-executor.6" exe="/syz-executor.6" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f8480eb7b19 code=0x7ffc0000 loop1: detected capacity change from 0 to 2048 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): failed to parse options in superblock: b EXT4-fs warning (device loop1): ext4_multi_mount_protect:288: Invalid MMP block in superblock loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): failed to parse options in superblock: b EXT4-fs warning (device loop1): ext4_multi_mount_protect:288: Invalid MMP block in superblock loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): failed to parse options in superblock: b EXT4-fs warning (device loop1): ext4_multi_mount_protect:288: Invalid MMP block in superblock loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. cdrom: dropping to single frame dma EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 512 loop7: detected capacity change from 0 to 512 EXT4-fs (loop1): failed to parse options in superblock: b EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs warning (device loop1): ext4_multi_mount_protect:288: Invalid MMP block in superblock EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): failed to parse options in superblock: b EXT4-fs warning (device loop1): ext4_multi_mount_protect:288: Invalid MMP block in superblock loop7: detected capacity change from 0 to 512 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. loop7: detected capacity change from 0 to 512 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. tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 40 00 I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x4000 phys_seg 32 prio class 2 netlink: 'syz-executor.7': attribute type 1 has an invalid length. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 40 00 00 40 00 I/O error, dev sr0, sector 256 op 0x0:(READ) flags 0x4000 phys_seg 32 prio class 2 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 80 00 00 40 00 I/O error, dev sr0, sector 512 op 0x0:(READ) flags 0x4000 phys_seg 32 prio class 2 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 c0 00 00 40 00 I/O error, dev sr0, sector 768 op 0x0:(READ) flags 0x0 phys_seg 29 prio class 2 msdos: Bad value for 'uid' msdos: Bad value for 'uid' msdos: Bad value for 'uid' msdos: Bad value for 'uid' sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 40 00 I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x4000 phys_seg 32 prio class 2 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 40 00 00 40 00 I/O error, dev sr0, sector 256 op 0x0:(READ) flags 0x4000 phys_seg 32 prio class 2 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 80 00 00 40 00 I/O error, dev sr0, sector 512 op 0x0:(READ) flags 0x4000 phys_seg 31 prio class 2 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 c0 00 00 40 00 I/O error, dev sr0, sector 768 op 0x0:(READ) flags 0x0 phys_seg 32 prio class 2 ISO 9660 Extensions: Microsoft Joliet Level 3 process 'syz-executor.5' launched './file1' with NULL argv: empty string added ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: e9 da fe ff ff jmpq 0xfffffee1 7: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) e: 00 00 00 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: f3 0f 1e fa endbr64 25: 48 8b 0c 24 mov (%rsp),%rcx * 29: 48 89 f2 mov %rsi,%rdx <-- trapping instruction 2c: 48 89 fe mov %rdi,%rsi 2f: bf 06 00 00 00 mov $0x6,%edi 34: e9 a8 fe ff ff jmpq 0xfffffee1 39: 0f .byte 0xf 3a: 1f (bad) 3b: 84 00 test %al,(%rax)