syzkaller login: [ 31.178217] BUG: Bad rss-counter state mm:0000000070ba2b14 type:MM_FILEPAGES val:33 [ 31.179759] BUG: Bad rss-counter state mm:0000000070ba2b14 type:MM_ANONPAGES val:22 [ 31.353488] ================================================================== [ 31.354405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.355342] Read of size 8 at addr ffff88800c7b6310 by task sshd/221 [ 31.356221] [ 31.356439] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.357323] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.358309] Call Trace: [ 31.358628] [ 31.358911] dump_stack_lvl+0x91/0xf0 [ 31.359405] print_report+0xcc/0x620 [ 31.359890] ? __virt_addr_valid+0x102/0x340 [ 31.360436] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.361045] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.361684] kasan_report+0xbe/0xf0 [ 31.362164] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.362783] vma_interval_tree_remove+0xc75/0xec0 [ 31.363401] vma_prepare+0xc54/0x11a0 [ 31.363884] __split_vma+0x5af/0x950 [ 31.364363] ? __pfx___split_vma+0x10/0x10 [ 31.364892] ? find_held_lock+0x2c/0x110 [ 31.365428] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.366000] ? lock_is_held_type+0x9f/0x120 [ 31.366538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.367149] ? mtree_range_walk+0x632/0x900 [ 31.367709] ? mas_walk+0x5c7/0x7c0 [ 31.368188] do_vmi_munmap+0x1f1/0x2b0 [ 31.368688] mmap_region+0x1f9/0x2660 [ 31.369168] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.369705] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.370421] ? __pfx_lock_acquire+0x10/0x10 [ 31.370952] ? __pfx_mmap_region+0x10/0x10 [ 31.371483] ? security_mmap_addr+0x7d/0xa0 [ 31.372025] ? get_unmapped_area+0x1f5/0x3f0 [ 31.372583] do_mmap+0x854/0xf00 [ 31.373020] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.373534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.374108] ksys_mmap_pgoff+0x3af/0x500 [ 31.374617] do_syscall_64+0x3f/0x90 [ 31.375099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.375746] RIP: 0033:0x7f7163fd0d82 [ 31.376205] 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 [ 31.378342] RSP: 002b:00007ffc169a9bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.379260] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7163fd0d82 [ 31.380118] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f716340a000 [ 31.380975] RBP: 00007f716340a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.381845] R10: 0000000000000812 R11: 0000000000000206 R12: 000056104f47cf70 [ 31.382689] R13: 00007ffc169a9bd0 R14: 00007ffc169a9c00 R15: 00007ffc169a9f60 [ 31.383541] [ 31.383832] [ 31.384047] Allocated by task 214: [ 31.384485] kasan_save_stack+0x22/0x50 [ 31.384999] kasan_set_track+0x25/0x30 [ 31.385530] __kasan_slab_alloc+0x59/0x70 [ 31.386060] kmem_cache_alloc+0x16b/0x370 [ 31.386571] vm_area_dup+0x20/0x160 [ 31.387023] __split_vma+0x170/0x950 [ 31.387486] split_vma+0xc6/0x110 [ 31.387927] mprotect_fixup+0x8d2/0xb30 [ 31.388429] do_mprotect_pkey+0x87e/0xd40 [ 31.388947] __x64_sys_mprotect+0x78/0xc0 [ 31.389477] do_syscall_64+0x3f/0x90 [ 31.389951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.390591] [ 31.390808] Freed by task 214: [ 31.391200] kasan_save_stack+0x22/0x50 [ 31.391704] kasan_set_track+0x25/0x30 [ 31.392197] kasan_save_free_info+0x2b/0x50 [ 31.392723] __kasan_slab_free+0x10a/0x190 [ 31.393272] kmem_cache_free+0x10d/0x4d0 [ 31.393786] rcu_core+0x8c8/0x2860 [ 31.394230] __do_softirq+0x1b7/0x7d4 [ 31.394705] [ 31.394918] Last potentially related work creation: [ 31.395505] kasan_save_stack+0x22/0x50 [ 31.396005] __kasan_record_aux_stack+0x8e/0xa0 [ 31.396573] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.397225] remove_vma+0x139/0x170 [ 31.397673] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.398231] do_vmi_munmap+0x1f1/0x2b0 [ 31.398720] __vm_munmap+0x138/0x3a0 [ 31.399184] __x64_sys_munmap+0x59/0x80 [ 31.399682] do_syscall_64+0x3f/0x90 [ 31.400158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.400795] [ 31.401014] The buggy address belongs to the object at ffff88800c7b62b8 [ 31.401014] which belongs to the cache vm_area_struct of size 168 [ 31.402503] The buggy address is located 88 bytes inside of [ 31.402503] freed 168-byte region [ffff88800c7b62b8, ffff88800c7b6360) [ 31.403899] [ 31.404115] The buggy address belongs to the physical page: [ 31.404779] page:000000002c5782ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7b6 [ 31.405858] memcg:ffff888016514101 [ 31.406283] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.406931] page_type: 0xffffffff() [ 31.407390] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.408301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016514101 [ 31.409234] page dumped because: kasan: bad access detected [ 31.409892] [ 31.410106] Memory state around the buggy address: [ 31.410690] ffff88800c7b6200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.411556] ffff88800c7b6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.412418] >ffff88800c7b6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.413276] ^ [ 31.413746] ffff88800c7b6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.414602] ffff88800c7b6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.415450] ================================================================== [ 31.416418] Disabling lock debugging due to kernel taint [ 33.737094] BUG: Bad rss-counter state mm:00000000127fe3ae type:MM_FILEPAGES val:33 [ 33.738373] BUG: Bad rss-counter state mm:00000000127fe3ae type:MM_ANONPAGES val:22 [ 34.187459] BUG: Bad rss-counter state mm:00000000c1ccd7ce type:MM_FILEPAGES val:33 [ 34.188668] BUG: Bad rss-counter state mm:00000000c1ccd7ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16896' (ECDSA) to the list of known hosts. 2023/06/20 22:45:03 fuzzer started 2023/06/20 22:45:03 dialing manager at localhost:36067 2023/06/20 22:45:03 checking machine... 2023/06/20 22:45:03 checking revisions... [ 34.878398] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:45:03 testing simple program... [ 34.921294] cgroup: Unknown subsys name 'net' [ 34.968476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:45:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880167d75e8 RCX=0000000000000001 RDX=1ffff11002cfaebf RSI=ffff8880167d7ad8 RDI=ffff8880167d75f8 RBP=ffff8880167d7ad8 RSP=ffff8880167d7540 R8 =ffffffff86143636 R9 =ffff8880167d7628 R10=0000000000038001 R11=0000000000022987 R12=0000000000000008 R13=ffff8880167d0000 R14=ffff8880167d7ae0 R15=ffff8880167d75e8 RIP=ffffffff81130468 RFL=00000246 [---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 00007f414f611900 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=00007f414fbc90b0 CR3=000000000d910000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000010 RBX=00007f4204002f10 RCX=0000000080000000 RDX=0000000080000032 RSI=00007f4204003118 RDI=00007f4204002f28 RBP=00007f4204002f28 RSP=00007f4211c0b730 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000286 R12=000055e610755871 R13=00007f4204002f10 R14=000055e610771ec0 R15=0000000000000000 RIP=000055e6107014f5 RFL=00000282 [--S----] 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 00007f4211c0c700 00000000 00000000 GS =0000 0000000000000000 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=00007fa69bc59740 CR3=000000000db6e000 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=2032303a35343a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a35343a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000