[ 30.673091] BUG: Bad rss-counter state mm:000000004ca5e9f0 type:MM_FILEPAGES val:33 [ 30.674297] BUG: Bad rss-counter state mm:000000004ca5e9f0 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.841870] ================================================================== [ 30.842926] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.843932] Read of size 8 at addr ffff88800e1e34e0 by task sshd/220 [ 30.844949] [ 30.845186] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.846110] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.847160] Call Trace: [ 30.847506] [ 30.847829] dump_stack_lvl+0x91/0xf0 [ 30.848387] print_report+0xcc/0x620 [ 30.849021] ? __virt_addr_valid+0x102/0x340 [ 30.849741] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.850531] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.851264] kasan_report+0xbe/0xf0 [ 30.851914] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852751] vma_interval_tree_remove+0xc75/0xec0 [ 30.853541] vma_prepare+0xc54/0x11a0 [ 30.854133] __split_vma+0x5af/0x950 [ 30.854770] ? __pfx___split_vma+0x10/0x10 [ 30.855502] ? find_held_lock+0x2c/0x110 [ 30.856245] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.856888] ? lock_is_held_type+0x9f/0x120 [ 30.857501] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.858190] ? mtree_range_walk+0x632/0x900 [ 30.858821] ? mas_walk+0x5c7/0x7c0 [ 30.859371] do_vmi_munmap+0x1f1/0x2b0 [ 30.859946] mmap_region+0x1f9/0x2660 [ 30.860509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.861099] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.861913] ? __pfx_lock_acquire+0x10/0x10 [ 30.862499] ? __pfx_mmap_region+0x10/0x10 [ 30.863033] ? security_mmap_addr+0x7d/0xa0 [ 30.863612] ? get_unmapped_area+0x1f5/0x3f0 [ 30.864257] do_mmap+0x854/0xf00 [ 30.864762] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.865346] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.866007] ksys_mmap_pgoff+0x3af/0x500 [ 30.866562] do_syscall_64+0x3f/0x90 [ 30.867042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867783] RIP: 0033:0x7f4007fefd82 [ 30.868321] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.870721] RSP: 002b:00007ffc354ffde8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.871688] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4007fefd82 [ 30.872651] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4007429000 [ 30.873589] RBP: 00007f4007429000 R08: 0000000000000009 R09: 0000000000001000 [ 30.874447] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e820fe5ec0 [ 30.875302] R13: 00007ffc354ffe00 R14: 00007ffc354ffe30 R15: 00007ffc35500190 [ 30.876314] [ 30.876656] [ 30.876903] Allocated by task 213: [ 30.877401] kasan_save_stack+0x22/0x50 [ 30.877985] kasan_set_track+0x25/0x30 [ 30.878529] __kasan_slab_alloc+0x59/0x70 [ 30.879056] kmem_cache_alloc+0x16b/0x370 [ 30.879601] vm_area_dup+0x20/0x160 [ 30.880068] __split_vma+0x170/0x950 [ 30.880580] split_vma+0xc6/0x110 [ 30.881094] mprotect_fixup+0x8d2/0xb30 [ 30.881680] do_mprotect_pkey+0x87e/0xd40 [ 30.882289] __x64_sys_mprotect+0x78/0xc0 [ 30.883014] do_syscall_64+0x3f/0x90 [ 30.883672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884562] [ 30.884849] Freed by task 213: [ 30.885406] kasan_save_stack+0x22/0x50 [ 30.886032] kasan_set_track+0x25/0x30 [ 30.886689] kasan_save_free_info+0x2b/0x50 [ 30.887430] __kasan_slab_free+0x10a/0x190 [ 30.888109] kmem_cache_free+0x10d/0x4d0 [ 30.888805] rcu_core+0x8c8/0x2860 [ 30.889416] __do_softirq+0x1b7/0x7d4 [ 30.890000] [ 30.890267] Last potentially related work creation: [ 30.890983] kasan_save_stack+0x22/0x50 [ 30.891611] __kasan_record_aux_stack+0x8e/0xa0 [ 30.892319] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.893111] remove_vma+0x139/0x170 [ 30.893660] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.894340] do_vmi_munmap+0x1f1/0x2b0 [ 30.894933] __vm_munmap+0x138/0x3a0 [ 30.895504] __x64_sys_munmap+0x59/0x80 [ 30.896128] do_syscall_64+0x3f/0x90 [ 30.896705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.897497] [ 30.897760] Second to last potentially related work creation: [ 30.898603] kasan_save_stack+0x22/0x50 [ 30.899217] __kasan_record_aux_stack+0x8e/0xa0 [ 30.899933] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.900707] remove_vma+0x139/0x170 [ 30.901257] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.901937] do_vmi_munmap+0x1f1/0x2b0 [ 30.902537] mmap_region+0x1f9/0x2660 [ 30.903128] do_mmap+0x854/0xf00 [ 30.903678] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.904279] ksys_mmap_pgoff+0x3af/0x500 [ 30.904898] do_syscall_64+0x3f/0x90 [ 30.905464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.906260] [ 30.906528] The buggy address belongs to the object at ffff88800e1e3488 [ 30.906528] which belongs to the cache vm_area_struct of size 168 [ 30.908366] The buggy address is located 88 bytes inside of [ 30.908366] freed 168-byte region [ffff88800e1e3488, ffff88800e1e3530) [ 30.910102] [ 30.910370] The buggy address belongs to the physical page: [ 30.911192] page:00000000817ab1e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1e3 [ 30.912539] memcg:ffff88800ddd7e01 [ 30.913073] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.913876] page_type: 0xffffffff() [ 30.914429] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384880 dead000000000008 [ 30.915576] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddd7e01 [ 30.916722] page dumped because: kasan: bad access detected [ 30.917547] [ 30.917814] Memory state around the buggy address: [ 30.918546] ffff88800e1e3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.919624] ffff88800e1e3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.920682] >ffff88800e1e3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.921726] ^ [ 30.922660] ffff88800e1e3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.923723] ffff88800e1e3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.924782] ================================================================== [ 30.925950] Disabling lock debugging due to kernel taint [ 33.366889] BUG: Bad rss-counter state mm:00000000c3707ad5 type:MM_FILEPAGES val:33 [ 33.367915] BUG: Bad rss-counter state mm:00000000c3707ad5 type:MM_ANONPAGES val:22 [ 33.890293] BUG: Bad rss-counter state mm:000000006171d55c type:MM_FILEPAGES val:33 [ 33.891583] BUG: Bad rss-counter state mm:000000006171d55c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64912' (ECDSA) to the list of known hosts. 2023/06/21 03:19:07 fuzzer started 2023/06/21 03:19:08 dialing manager at localhost:36067 2023/06/21 03:19:08 checking machine... 2023/06/21 03:19:08 checking revisions... [ 34.621703] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:19:08 testing simple program... [ 34.673591] cgroup: Unknown subsys name 'net' [ 34.729723] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:19:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019f825f0 RCX=ffff88800844f780 RDX=ffffea000067e080 RSI=ffff888019f82390 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88800d987858 R8 =ffff888019f82720 R9 =0000000000000000 R10=ffffea000067e080 R11=00000000000d0005 R12=dffffc0000000000 R13=ffff88800d987898 R14=ffff88800844f780 R15=ffff888019f82390 RIP=ffffffff81810316 RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd680c7b900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fffcec78f98 CR3=00000000144ba000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=942bea364ff164ab7e466b03a4b8029d XMM02=2c67c8bc2e329bc3000000000011b038 XMM03=375afdebbf381c8100000000001207c0 XMM04=5d4e417d59b6b02800000000000ae988 XMM05=1319e678c5640f8a0000000000133de0 XMM06=94aac670ef06ff650000000000133d48 XMM07=58f17c1affdc82d600000000001231a0 XMM08=406589be3f9c4b220000000000123008 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801463d1c0 RSI=ffffffff83699870 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88801685f8c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000024 R11=0000000000000000 R12=ffff88800f248000 R13=ffff88800f2480dc R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c089b RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f98f4ac9900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fff3e694000 CR3=000000000f5dc000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000