syzkaller login: [ 31.056987] BUG: Bad rss-counter state mm:0000000095518f1b type:MM_FILEPAGES val:33 [ 31.058155] BUG: Bad rss-counter state mm:0000000095518f1b type:MM_ANONPAGES val:22 [ 31.227518] ================================================================== [ 31.228457] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.229401] Read of size 8 at addr ffff88800ee90968 by task sshd/219 [ 31.230189] [ 31.230498] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.231377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.232382] Call Trace: [ 31.232705] [ 31.232998] dump_stack_lvl+0x91/0xf0 [ 31.233498] print_report+0xcc/0x620 [ 31.233990] ? __virt_addr_valid+0x102/0x340 [ 31.234553] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.235169] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.235793] kasan_report+0xbe/0xf0 [ 31.236287] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.236922] vma_interval_tree_remove+0xc75/0xec0 [ 31.237546] vma_prepare+0xc54/0x11a0 [ 31.238046] __split_vma+0x5af/0x950 [ 31.238540] ? __pfx___split_vma+0x10/0x10 [ 31.239093] ? find_held_lock+0x2c/0x110 [ 31.239631] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.240237] ? lock_is_held_type+0x9f/0x120 [ 31.240802] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.241435] ? mtree_range_walk+0x632/0x900 [ 31.242010] ? mas_walk+0x5c7/0x7c0 [ 31.242505] do_vmi_munmap+0x1f1/0x2b0 [ 31.243018] mmap_region+0x1f9/0x2660 [ 31.243520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.244073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.244812] ? __pfx_lock_acquire+0x10/0x10 [ 31.245369] ? __pfx_mmap_region+0x10/0x10 [ 31.245936] ? security_mmap_addr+0x7d/0xa0 [ 31.246496] ? get_unmapped_area+0x1f5/0x3f0 [ 31.247079] do_mmap+0x854/0xf00 [ 31.247538] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.248074] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.248662] ksys_mmap_pgoff+0x3af/0x500 [ 31.249206] do_syscall_64+0x3f/0x90 [ 31.249706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.250400] RIP: 0033:0x7f09423cfd82 [ 31.250878] 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 [ 31.253141] RSP: 002b:00007ffdd5604d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.254104] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09423cfd82 [ 31.254992] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0941809000 [ 31.255900] RBP: 00007f0941809000 R08: 0000000000000009 R09: 0000000000001000 [ 31.256792] R10: 0000000000000812 R11: 0000000000000206 R12: 000055785ec64ec0 [ 31.257674] R13: 00007ffdd5604d90 R14: 00007ffdd5604dc0 R15: 00007ffdd5605120 [ 31.258566] [ 31.258871] [ 31.259087] Allocated by task 212: [ 31.259544] kasan_save_stack+0x22/0x50 [ 31.260063] kasan_set_track+0x25/0x30 [ 31.260582] __kasan_slab_alloc+0x59/0x70 [ 31.261127] kmem_cache_alloc+0x16b/0x370 [ 31.261673] vm_area_dup+0x20/0x160 [ 31.262148] __split_vma+0x170/0x950 [ 31.262640] split_vma+0xc6/0x110 [ 31.263100] mprotect_fixup+0x8d2/0xb30 [ 31.263626] do_mprotect_pkey+0x87e/0xd40 [ 31.264199] __x64_sys_mprotect+0x78/0xc0 [ 31.264745] do_syscall_64+0x3f/0x90 [ 31.265252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265924] [ 31.266148] Freed by task 19: [ 31.266545] kasan_save_stack+0x22/0x50 [ 31.267071] kasan_set_track+0x25/0x30 [ 31.267590] kasan_save_free_info+0x2b/0x50 [ 31.268149] __kasan_slab_free+0x10a/0x190 [ 31.268685] kmem_cache_free+0x10d/0x4d0 [ 31.269198] rcu_core+0x8c8/0x2860 [ 31.269643] __do_softirq+0x1b7/0x7d4 [ 31.270130] [ 31.270347] Last potentially related work creation: [ 31.270934] kasan_save_stack+0x22/0x50 [ 31.271438] __kasan_record_aux_stack+0x8e/0xa0 [ 31.272027] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.272671] remove_vma+0x139/0x170 [ 31.273125] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.273691] do_vmi_munmap+0x1f1/0x2b0 [ 31.274179] __vm_munmap+0x138/0x3a0 [ 31.274643] __x64_sys_munmap+0x59/0x80 [ 31.275136] do_syscall_64+0x3f/0x90 [ 31.275606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.276269] [ 31.276485] The buggy address belongs to the object at ffff88800ee90910 [ 31.276485] which belongs to the cache vm_area_struct of size 168 [ 31.277956] The buggy address is located 88 bytes inside of [ 31.277956] freed 168-byte region [ffff88800ee90910, ffff88800ee909b8) [ 31.279337] [ 31.279555] The buggy address belongs to the physical page: [ 31.280221] page:000000001ab125a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee90 [ 31.281297] memcg:ffff88800e913a01 [ 31.281722] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.282408] page_type: 0xffffffff() [ 31.282858] raw: 0100000000000200 ffff8880087a0c80 ffffea0000385100 dead000000000003 [ 31.283774] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e913a01 [ 31.284687] page dumped because: kasan: bad access detected [ 31.285341] [ 31.285552] Memory state around the buggy address: [ 31.286127] ffff88800ee90800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.286967] ffff88800ee90880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.287814] >ffff88800ee90900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.288667] ^ [ 31.289439] ffff88800ee90980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.290289] ffff88800ee90a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.291130] ================================================================== [ 31.292132] Disabling lock debugging due to kernel taint [ 33.113257] BUG: Bad rss-counter state mm:0000000054a8858c type:MM_FILEPAGES val:33 [ 33.114025] BUG: Bad rss-counter state mm:0000000054a8858c type:MM_ANONPAGES val:22 [ 33.525370] BUG: Bad rss-counter state mm:00000000b56dc147 type:MM_FILEPAGES val:33 [ 33.526370] BUG: Bad rss-counter state mm:00000000b56dc147 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54924' (ECDSA) to the list of known hosts. 2023/06/20 18:16:26 fuzzer started 2023/06/20 18:16:26 dialing manager at localhost:36067 2023/06/20 18:16:26 checking machine... 2023/06/20 18:16:26 checking revisions... [ 34.202263] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:16:26 testing simple program... [ 34.258654] cgroup: Unknown subsys name 'net' [ 34.324243] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:16:26 Registers: info registers vcpu 0 RAX=00000016f75dd5a0 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=0000000000054945 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f21c2 R11=ffff88806ce09ff8 R12=0000000000054945 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff81106295 RFL=00000013 [----A-C] 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 0000000000000000 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=00007fdd2169d040 CR3=000000000fbbc000 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=36313a3831203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343034 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb1340 RBX=ffffffff85d89a04 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff888019426f48 R8 =ffffffff8608a556 R9 =ffff888019427090 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a10 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007f2c51c4d900 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=00007f2c51c2c020 CR3=000000000f2d0000 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=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