===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.2/4837 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.2/4837: #0: ffff88800fd783f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888042dc03e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fd7c950 (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: 4837 Comm: syz-executor.2 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_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe1cd9c2427 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:00007ffd75d0c258 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe1cd9c2427 RDX: 00007ffd75d0c337 RSI: 00007fe1cda1d019 RDI: 00007ffd75d0c320 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd75d0c0f0 R10: 00007ffd75d0bfa7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffd75d0c320 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.2/4837 Modules linked in: CPU: 1 UID: 0 PID: 4837 Comm: syz-executor.2 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:ffff88806cf08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff88804b439b80 RCX: ffffffff81893504 RDX: 0000000000000000 RSI: ffffffff8189351b RDI: ffff88804b439f7c RBP: ffff88804b439b80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88806cf08ff8 R12: ffff88804b439b80 R13: 0000000000000001 R14: ffff88806cf379c0 R15: ffff88806cf37a20 FS: 0000555594ee3400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe1cda42542 CR3: 000000000dc71000 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_pc+0x0/0x80 Code: 5d 41 5c 41 5d e9 80 16 5c 03 48 c7 c0 f4 ff ff ff eb 92 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 34 24 65 48 8b 15 68 54 38 06 65 8b 05 79 54 38 RSP: 0018:ffff88804f0cf748 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffffffff866815e0 RCX: ffffffff84c51bdf RDX: ffff88804b439b80 RSI: ffffffff815d6d6f RDI: 0000000000000006 RBP: ffffffff8156cfa6 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8156cfa6 R11: 0000000000000000 R12: ffffffff815d6d6f R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000b __report_bug+0x4d9/0x5b0 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 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:ffff88804f0cf9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88804b439b80 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88804b439f7c RBP: ffff88804b439b80 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88804b439b80 R13: 0000000000000001 R14: ffffffff85c0c750 R15: ffff888042cf58e0 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe1cd9c2427 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:00007ffd75d0c258 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe1cd9c2427 RDX: 00007ffd75d0c337 RSI: 00007fe1cda1d019 RDI: 00007ffd75d0c320 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd75d0c0f0 R10: 00007ffd75d0bfa7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffd75d0c320 irq event stamp: 211 hardirqs last enabled at (211): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (210): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (206): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (204): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- syz-executor.3 (4855) used greatest stack depth: 23672 bytes left set_capacity_and_notify: 9 callbacks suppressed loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1326 audit(1768378956.916:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4982 comm="syz-executor.3" exe="/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f65b9e1fb19 code=0x7ffc0000 audit: type=1326 audit(1768378956.918:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4982 comm="syz-executor.3" exe="/syz-executor.3" sig=0 arch=c000003e syscall=22 compat=0 ip=0x7f65b9e1fb19 code=0x7ffc0000 audit: type=1326 audit(1768378956.918:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4982 comm="syz-executor.3" exe="/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f65b9e1fb19 code=0x7ffc0000 audit: type=1326 audit(1768378956.924:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4982 comm="syz-executor.3" exe="/syz-executor.3" sig=0 arch=c000003e syscall=278 compat=0 ip=0x7f65b9e1fb19 code=0x7ffc0000 audit: type=1326 audit(1768378956.925:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4982 comm="syz-executor.3" exe="/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f65b9e1fb19 code=0x7ffc0000 audit: type=1326 audit(1768378956.932:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4982 comm="syz-executor.3" exe="/syz-executor.3" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7f65b9e1fb19 code=0x7ffc0000 audit: type=1326 audit(1768378956.941:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4982 comm="syz-executor.3" exe="/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f65b9e1fb19 code=0x7ffc0000 audit: type=1326 audit(1768378957.124:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5002 comm="syz-executor.3" exe="/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f65b9e1fb19 code=0x7ffc0000 audit: type=1326 audit(1768378957.128:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5002 comm="syz-executor.3" exe="/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f65b9e1fb19 code=0x7ffc0000 audit: type=1326 audit(1768378957.128:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5002 comm="syz-executor.3" exe="/syz-executor.3" sig=0 arch=c000003e syscall=22 compat=0 ip=0x7f65b9e1fb19 code=0x7ffc0000 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 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 loop4: detected capacity change from 0 to 2097151 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 loop4: detected capacity change from 0 to 2097151 loop7: detected capacity change from 0 to 4 loop4: detected capacity change from 0 to 2097151 EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop7): unsupported descriptor size 0 loop7: detected capacity change from 0 to 4 EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop7): unsupported descriptor size 0 scsi_io_completion_action: 6 callbacks suppressed 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 07 ff c0 00 00 02 00 blk_print_req_error: 6 callbacks suppressed I/O error, dev sr0, sector 2096896 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 vfat: Bad value for 'time_offset' vfat: Bad value for 'time_offset' I/O error, dev loop4, sector 2096896 op 0x0:(READ) flags 0x880700 phys_seg 1 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 07 ff c0 00 00 02 00 I/O error, dev sr0, sector 2096896 op 0x0:(READ) flags 0x800000 phys_seg 8 prio class 2 I/O error, dev loop4, sector 2096896 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop4, logical block 2096896, async page read I/O error, dev loop4, sector 2096897 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop4, logical block 2096897, async page read I/O error, dev loop4, sector 2096898 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop4, logical block 2096898, async page read I/O error, dev loop4, sector 2096899 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop4, logical block 2096899, async page read I/O error, dev loop4, sector 2096900 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop4, logical block 2096900, async page read I/O error, dev loop4, sector 2096901 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop4, logical block 2096901, async page read I/O error, dev loop4, sector 2096902 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev loop4, logical block 2096902, async page read Buffer I/O error on dev loop4, logical block 2096903, async page read loop7: detected capacity change from 0 to 4 EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop7): unsupported descriptor size 0 vfat: Bad value for 'time_offset' vfat: Bad value for 'time_offset' loop7: detected capacity change from 0 to 4 EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop7): unsupported descriptor size 0 loop7: detected capacity change from 0 to 4 vfat: Bad value for 'time_offset' EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled EXT4-fs (loop7): unsupported descriptor size 0 netlink: 'syz-executor.6': attribute type 8 has an invalid length. netlink: 'syz-executor.6': attribute type 8 has an invalid length. netlink: 'syz-executor.6': attribute type 8 has an invalid length. kauditd_printk_skb: 17 callbacks suppressed audit: type=1326 audit(1768378962.939:39): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5360 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7efddd97eb19 code=0x7ffc0000 audit: type=1326 audit(1768378962.948:40): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5360 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=186 compat=0 ip=0x7efddd97eb19 code=0x7ffc0000 audit: type=1326 audit(1768378962.948:41): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5360 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7efddd97eb19 code=0x7ffc0000 audit: type=1326 audit(1768378962.948:42): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5360 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=129 compat=0 ip=0x7efddd97eb19 code=0x7ffc0000 audit: type=1326 audit(1768378962.955:43): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5360 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7efddd97eb19 code=0x7ffc0000 audit: type=1326 audit(1768378962.960:44): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5360 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7efddd97eb19 code=0x7ffc0000 audit: type=1326 audit(1768378962.961:45): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5360 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7efddd97eb19 code=0x7ffc0000 audit: type=1326 audit(1768378962.963:46): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5360 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=186 compat=0 ip=0x7efddd97eb19 code=0x7ffc0000 netlink: 'syz-executor.6': attribute type 8 has an invalid length. audit: type=1326 audit(1768378963.144:47): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5375 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7efddd97eb19 code=0x7ffc0000 audit: type=1326 audit(1768378963.152:48): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5375 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7efddd97eb19 code=0x7ffc0000 netlink: 'syz-executor.6': attribute type 8 has an invalid length. netlink: 4368 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4368 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4368 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 4368 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4368 bytes leftover after parsing attributes in process `syz-executor.7'. ---------------- Code disassembly (best guess): 0: 5d pop %rbp 1: 41 5c pop %r12 3: 41 5d pop %r13 5: e9 80 16 5c 03 jmpq 0x35c168a a: 48 c7 c0 f4 ff ff ff mov $0xfffffffffffffff4,%rax 11: eb 92 jmp 0xffffffa5 13: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 90 nop 28: 90 nop 29: 90 nop * 2a: f3 0f 1e fa endbr64 <-- trapping instruction 2e: 48 8b 34 24 mov (%rsp),%rsi 32: 65 48 8b 15 68 54 38 mov %gs:0x6385468(%rip),%rdx # 0x63854a2 39: 06 3a: 65 gs 3b: 8b .byte 0x8b 3c: 05 .byte 0x5 3d: 79 54 jns 0x93 3f: 38 .byte 0x38