===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.4/4029 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.4/4029: #0: ffff88800f66a3f8 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1764/0x2d60 #1: ffff88801c976330 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: path_openat+0xe32/0x2d60 #2: ffff88800f66e950 (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: 4029 Comm: syz-executor.4 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_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_creat+0xcc/0x120 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4ca2881b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f4c9fdf7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f4ca2994f60 RCX: 00007f4ca2881b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0 RBP: 00007f4ca28dbf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc2b5d39ef R14: 00007f4c9fdf7300 R15: 0000000000022000 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.4/4029 Modules linked in: CPU: 1 UID: 0 PID: 4029 Comm: syz-executor.4 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:ffff88806cf08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88804a43b700 RCX: ffffffff81893b34 RDX: 0000000000000000 RSI: ffffffff81893b4b RDI: ffff88804a43bafc RBP: ffff88804a43b700 R08: ffffffff81893a8d R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804a43b700 R13: 0000000000000001 R14: ffff88806cf379c0 R15: ffff88806cf37a20 FS: 00007f4c9fdf7700(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4ca2995018 CR3: 000000003c53a000 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:handle_bug+0x209/0x4f0 Code: 83 db ff 0f 1f 44 00 00 90 4c 8b ad 90 00 00 00 31 ff 41 81 e5 00 02 00 00 4c 89 ee 0f 1f 44 00 00 4d 85 ed 0f 85 3d 01 00 00 <0f> 1f 44 00 00 48 63 fb 48 c7 c6 60 2a e2 84 0f 1f 44 00 00 81 fb RSP: 0018:ffff88801b1ef400 EFLAGS: 00000206 RAX: ffff88801b1ef468 RBX: 000000000000fffe RCX: ffffffff810016ca RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffff88801b1ef468 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff815d780f R13: 0000000000000200 R14: 0000000000000002 R15: 000000000000000b 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 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:ffff88801b1ef510 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804a43b700 RCX: ffffc9000741f000 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88804a43bafc RBP: ffff88804a43b700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804a43b700 R13: 0000000000000001 R14: ffffffff85c0c750 R15: ffff88801cb945d0 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_create+0x2e2/0x4e0 lookup_open.isra.0+0xc03/0x1030 path_openat+0xea4/0x2d60 do_file_open+0x209/0x460 do_sys_openat2+0xe7/0x210 __x64_sys_creat+0xcc/0x120 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4ca2881b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f4c9fdf7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f4ca2994f60 RCX: 00007f4ca2881b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0 RBP: 00007f4ca28dbf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc2b5d39ef R14: 00007f4c9fdf7300 R15: 0000000000022000 irq event stamp: 65 hardirqs last enabled at (65): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (64): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (60): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (58): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop4: detected capacity change from 0 to 512 audit: type=1400 audit(1768333327.597:11): avc: denied { write } for pid=4045 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.6'. EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. ======================================================= 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. ======================================================= loop6: detected capacity change from 0 to 64 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) netlink: 'syz-executor.4': attribute type 8 has an invalid length. process 'syz-executor.5' launched './file1' with NULL argv: empty string added loop3: detected capacity change from 0 to 16383 iso9660: Unknown parameter 'measure' loop3: detected capacity change from 0 to 16383 tmpfs: Bad value for 'size' loop0: detected capacity change from 0 to 64 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) tmpfs: Bad value for 'size' 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 08 00 blk_print_req_error: 8 callbacks suppressed I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x880700 phys_seg 4 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 buffer_io_error: 6 callbacks suppressed Buffer I/O error on dev sr0, logical block 0, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 1, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 2, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 3 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 3, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 4 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 4, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 5 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 5, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 6 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 6, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 7 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 7, async page read ---------------- Code disassembly (best guess): 0: 83 db ff sbb $0xffffffff,%ebx 3: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 8: 90 nop 9: 4c 8b ad 90 00 00 00 mov 0x90(%rbp),%r13 10: 31 ff xor %edi,%edi 12: 41 81 e5 00 02 00 00 and $0x200,%r13d 19: 4c 89 ee mov %r13,%rsi 1c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 21: 4d 85 ed test %r13,%r13 24: 0f 85 3d 01 00 00 jne 0x167 * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: 48 63 fb movslq %ebx,%rdi 32: 48 c7 c6 60 2a e2 84 mov $0xffffffff84e22a60,%rsi 39: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 3e: 81 .byte 0x81 3f: fb sti