WARNING: CPU: 0 PID: 5934 at lib/refcount.c:31 refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31 Modules linked in: CPU: 0 PID: 5934 Comm: syz-executor.3 Not tainted 6.9.0-rc4-syzkaller-00113-g2668e3ae2ef3 #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 97 6f d3 fc 90 0f 0b 90 90 e9 c3 fe ff ff e8 c8 9a 10 fd c6 05 c1 63 09 0b 01 90 48 c7 c7 c0 ba 6e 8b e8 74 6f d3 fc 90 <0f> 0b 90 90 e9 a0 fe ff ff 48 89 ef e8 e2 17 6d fd e9 44 fe ff ff RSP: 0018:ffffc900034eeef0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000c865000 RDX: 0000000000040000 RSI: ffffffff81512bf6 RDI: 0000000000000001 RBP: ffff88805ee8b73c R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88805ee8b73c R13: 0000000000000000 R14: 0000000006e40351 R15: ffff8880165180a8 FS: 0000000000000000(0000) GS:ffff88802c200000(0063) knlGS:00000000f5efab40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000031426000 CR3: 0000000063854000 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 shrink_folio_list+0x32e8/0x3f00 mm/vmscan.c:1428 reclaim_folio_list+0xe6/0x3a0 mm/vmscan.c:2108 reclaim_pages+0x499/0x670 mm/vmscan.c:2145 madvise_cold_or_pageout_pte_range+0x12af/0x1fc0 mm/madvise.c:413 walk_pmd_range mm/pagewalk.c:143 [inline] walk_pud_range mm/pagewalk.c:221 [inline] walk_p4d_range mm/pagewalk.c:256 [inline] walk_pgd_range+0xa5e/0x18a0 mm/pagewalk.c:293 __walk_page_range+0x643/0x780 mm/pagewalk.c:395 walk_page_range+0x630/0xa90 mm/pagewalk.c:521 madvise_pageout_page_range mm/madvise.c:586 [inline] madvise_pageout+0x32c/0x830 mm/madvise.c:613 madvise_vma_behavior+0x1d0/0x1bb0 mm/madvise.c:1032 madvise_walk_vmas+0x1cf/0x2c0 mm/madvise.c:1261 do_madvise+0x309/0x640 mm/madvise.c:1441 __do_sys_madvise mm/madvise.c:1454 [inline] __se_sys_madvise mm/madvise.c:1452 [inline] __ia32_sys_madvise+0xa7/0x110 mm/madvise.c:1452 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7308579 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:00000000f5efa5ac EFLAGS: 00000292 ORIG_RAX: 00000000000000db RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000600003 RDX: 0000000000000015 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 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