------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 0 PID: 5249 at lib/refcount.c:31 refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31 Modules linked in: CPU: 0 PID: 5249 Comm: syz-executor385 Not tainted 6.9.0-rc2-syzkaller-00435-g9fe30842a90b #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31 Code: 8b e8 17 c9 d3 fc 90 0f 0b 90 90 e9 c3 fe ff ff e8 88 f6 10 fd c6 05 84 06 0c 0b 01 90 48 c7 c7 00 d5 6e 8b e8 f4 c8 d3 fc 90 <0f> 0b 90 90 e9 a0 fe ff ff 48 89 ef e8 c2 7c 6d fd e9 44 fe ff ff RSP: 0018:ffffc900028b76a8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8150ed29 RDX: ffff88801fb1a440 RSI: ffffffff8150ed36 RDI: 0000000000000001 RBP: ffff888027031d3c R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888027031d3c R13: 0000000000000000 R14: 0000000003a4021c R15: ffff8880409b6ed8 FS: 0000000000000000(0000) GS:ffff88802c200000(0063) knlGS:0000000058030380 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000ffd89f0c CR3: 00000000163aa000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __refcount_dec include/linux/refcount.h:336 [inline] refcount_dec include/linux/refcount.h:351 [inline] dec_stack_record_count mm/page_owner.c:228 [inline] __reset_page_owner+0x2ea/0x370 mm/page_owner.c:266 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347 free_unref_folios+0x256/0xad0 mm/page_alloc.c:2536 folios_put_refs+0x49c/0x750 mm/swap.c:1034 folio_batch_release include/linux/pagevec.h:101 [inline] truncate_inode_pages_range+0x334/0xe90 mm/truncate.c:362 ext4_evict_inode+0x2cc/0x17a0 fs/ext4/inode.c:193 evict+0x2ed/0x6c0 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 do_unlinkat+0x613/0x750 fs/namei.c:4406 __do_sys_unlink fs/namei.c:4447 [inline] __se_sys_unlink fs/namei.c:4445 [inline] __ia32_sys_unlink+0xc6/0x110 fs/namei.c:4445 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7f/0x89 RIP: 0023:0xf7ed0579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000ffd8a55c EFLAGS: 00000296 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 00000000ffd8a600 RCX: 0000000000000000 RDX: 00000000f7f7dff4 RSI: 00000000ffd8a600 RDI: 00000000ffd8b664 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi