syzkaller login: [ 35.700846] BUG: Bad rss-counter state mm:00000000bbbeb0bb type:MM_FILEPAGES val:33 [ 35.702058] BUG: Bad rss-counter state mm:00000000bbbeb0bb type:MM_ANONPAGES val:22 [ 35.874700] ================================================================== [ 35.875748] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.876804] Read of size 8 at addr ffff888016a78228 by task sshd/218 [ 35.877834] [ 35.878087] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.879051] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.880162] Call Trace: [ 35.880538] [ 35.880860] dump_stack_lvl+0x91/0xf0 [ 35.881384] print_report+0xcc/0x620 [ 35.881896] ? __virt_addr_valid+0x102/0x340 [ 35.882476] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.883128] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.883789] kasan_report+0xbe/0xf0 [ 35.884298] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.884972] vma_interval_tree_remove+0xc75/0xec0 [ 35.885606] vma_prepare+0xc54/0x11a0 [ 35.886113] __split_vma+0x5af/0x950 [ 35.886610] ? __pfx___split_vma+0x10/0x10 [ 35.887172] ? find_held_lock+0x2c/0x110 [ 35.887730] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.888340] ? lock_is_held_type+0x9f/0x120 [ 35.888933] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.889581] ? mtree_range_walk+0x632/0x900 [ 35.890162] ? mas_walk+0x5c7/0x7c0 [ 35.890660] do_vmi_munmap+0x1f1/0x2b0 [ 35.891183] mmap_region+0x1f9/0x2660 [ 35.891708] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.892245] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.893007] ? __pfx_lock_acquire+0x10/0x10 [ 35.893571] ? __pfx_mmap_region+0x10/0x10 [ 35.894135] ? security_mmap_addr+0x7d/0xa0 [ 35.894699] ? get_unmapped_area+0x1f5/0x3f0 [ 35.895287] do_mmap+0x854/0xf00 [ 35.895764] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.896290] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.896908] ksys_mmap_pgoff+0x3af/0x500 [ 35.897447] do_syscall_64+0x3f/0x90 [ 35.897958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.898651] RIP: 0033:0x7fd0c206ed82 [ 35.899138] 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 [ 35.901428] RSP: 002b:00007fff9b0f2ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.902379] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0c206ed82 [ 35.903288] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0c14a8000 [ 35.904196] RBP: 00007fd0c14a8000 R08: 0000000000000009 R09: 0000000000001000 [ 35.905110] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565224f20f70 [ 35.906005] R13: 00007fff9b0f2cc0 R14: 00007fff9b0f2cf0 R15: 00007fff9b0f3050 [ 35.906919] [ 35.907231] [ 35.907459] Allocated by task 211: [ 35.907919] kasan_save_stack+0x22/0x50 [ 35.908464] kasan_set_track+0x25/0x30 [ 35.909017] __kasan_slab_alloc+0x59/0x70 [ 35.909573] kmem_cache_alloc+0x16b/0x370 [ 35.910123] vm_area_dup+0x20/0x160 [ 35.910578] __split_vma+0x170/0x950 [ 35.911048] split_vma+0xc6/0x110 [ 35.911489] mprotect_fixup+0x8d2/0xb30 [ 35.911988] do_mprotect_pkey+0x87e/0xd40 [ 35.912522] __x64_sys_mprotect+0x78/0xc0 [ 35.913042] do_syscall_64+0x3f/0x90 [ 35.913519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.914164] [ 35.914382] Freed by task 19: [ 35.914777] kasan_save_stack+0x22/0x50 [ 35.915282] kasan_set_track+0x25/0x30 [ 35.915782] kasan_save_free_info+0x2b/0x50 [ 35.916312] __kasan_slab_free+0x10a/0x190 [ 35.916868] kmem_cache_free+0x10d/0x4d0 [ 35.917376] rcu_core+0x8c8/0x2860 [ 35.917829] __do_softirq+0x1b7/0x7d4 [ 35.918374] [ 35.918592] Last potentially related work creation: [ 35.919180] kasan_save_stack+0x22/0x50 [ 35.919686] __kasan_record_aux_stack+0x8e/0xa0 [ 35.920260] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.920917] remove_vma+0x139/0x170 [ 35.921379] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.921955] do_vmi_munmap+0x1f1/0x2b0 [ 35.922438] __vm_munmap+0x138/0x3a0 [ 35.922918] __x64_sys_munmap+0x59/0x80 [ 35.923418] do_syscall_64+0x3f/0x90 [ 35.923897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.924542] [ 35.924757] The buggy address belongs to the object at ffff888016a781d0 [ 35.924757] which belongs to the cache vm_area_struct of size 168 [ 35.926229] The buggy address is located 88 bytes inside of [ 35.926229] freed 168-byte region [ffff888016a781d0, ffff888016a78278) [ 35.927637] [ 35.927853] The buggy address belongs to the physical page: [ 35.928537] page:00000000398b4580 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a78 [ 35.929623] memcg:ffff888009784f01 [ 35.930046] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.930742] page_type: 0xffffffff() [ 35.931196] raw: 0100000000000200 ffff88800879fc80 ffffea0000353cc0 dead000000000007 [ 35.932119] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009784f01 [ 35.933058] page dumped because: kasan: bad access detected [ 35.933718] [ 35.933935] Memory state around the buggy address: [ 35.934529] ffff888016a78100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.935378] ffff888016a78180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.936235] >ffff888016a78200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.937171] ^ [ 35.937796] ffff888016a78280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.938758] ffff888016a78300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.939713] ================================================================== [ 35.940930] Disabling lock debugging due to kernel taint [ 37.898371] BUG: Bad rss-counter state mm:00000000dc481c25 type:MM_FILEPAGES val:33 [ 37.899316] BUG: Bad rss-counter state mm:00000000dc481c25 type:MM_ANONPAGES val:22 [ 38.410624] BUG: Bad rss-counter state mm:00000000c717d505 type:MM_FILEPAGES val:33 [ 38.411798] BUG: Bad rss-counter state mm:00000000c717d505 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64589' (ECDSA) to the list of known hosts. 2023/06/20 03:21:03 fuzzer started 2023/06/20 03:21:03 dialing manager at localhost:44161 2023/06/20 03:21:03 checking machine... 2023/06/20 03:21:03 checking revisions... [ 39.077004] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:21:03 testing simple program... [ 39.118093] cgroup: Unknown subsys name 'net' [ 39.160071] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:20:58 Registers: info registers vcpu 0 RAX=00007f9c46a7a250 RBX=000055b41fc644c0 RCX=000055b41fc629b0 RDX=0000000000000001 RSI=0000000000000004 RDI=000055b41fc60350 RBP=0000000000000000 RSP=00007ffe5f9aa830 R8 =0000000000000004 R9 =0000000000000006 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=000055b41fc60350 R14=0000000000000000 R15=0000000000000000 RIP=00007f9c46a7a252 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9c46aa6900 00000000 00000000 GS =0000 0000000000000000 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=00007ffe5f9a4000 CR3=000000000ef62000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007fc7642a28b0 CR3=000000000c780000 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=00000000000000000000000000000000 XMM01=cc672fea352918828f4761b0174a207f XMM02=000000000011faf0eff9b2d0a8fce9cb XMM03=000000000011fbc02c67c8bc2e329bc3 XMM04=c0d134187d05bb9900000000000ae988 XMM05=31da05f4f4f24f710000000000134490 XMM06=bdf2e299e47b49d500000000001331c0 XMM07=e042d86d42eb936e0000000000123aa8 XMM08=2a89d65509c90c4c000000000011fbc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000