syzkaller login: [ 31.062490] BUG: Bad rss-counter state mm:00000000ba2e9682 type:MM_FILEPAGES val:33 [ 31.063590] BUG: Bad rss-counter state mm:00000000ba2e9682 type:MM_ANONPAGES val:22 [ 31.233962] ================================================================== [ 31.234689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.235436] Read of size 8 at addr ffff88801a20f4e0 by task sshd/221 [ 31.236043] [ 31.236227] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.237036] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.237835] Call Trace: [ 31.238095] [ 31.238314] dump_stack_lvl+0x91/0xf0 [ 31.238673] print_report+0xcc/0x620 [ 31.239012] ? __virt_addr_valid+0x102/0x340 [ 31.239397] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.239827] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240263] kasan_report+0xbe/0xf0 [ 31.240605] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.241038] vma_interval_tree_remove+0xc75/0xec0 [ 31.241463] vma_prepare+0xc54/0x11a0 [ 31.241797] __split_vma+0x5af/0x950 [ 31.242140] ? __pfx___split_vma+0x10/0x10 [ 31.242513] ? find_held_lock+0x2c/0x110 [ 31.242874] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.243275] ? lock_is_held_type+0x9f/0x120 [ 31.243658] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.244091] ? mtree_range_walk+0x632/0x900 [ 31.244485] ? mas_walk+0x5c7/0x7c0 [ 31.244837] do_vmi_munmap+0x1f1/0x2b0 [ 31.245188] mmap_region+0x1f9/0x2660 [ 31.245524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.245890] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.246410] ? __pfx_lock_acquire+0x10/0x10 [ 31.246787] ? __pfx_mmap_region+0x10/0x10 [ 31.247161] ? security_mmap_addr+0x7d/0xa0 [ 31.247539] ? get_unmapped_area+0x1f5/0x3f0 [ 31.247932] do_mmap+0x854/0xf00 [ 31.248253] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.248606] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.249012] ksys_mmap_pgoff+0x3af/0x500 [ 31.249375] do_syscall_64+0x3f/0x90 [ 31.249720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.250205] RIP: 0033:0x7f25e34fcd82 [ 31.250544] 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 [ 31.252080] RSP: 002b:00007fff63a7ed58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.252721] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25e34fcd82 [ 31.253333] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25e2936000 [ 31.253949] RBP: 00007f25e2936000 R08: 0000000000000009 R09: 0000000000001000 [ 31.254570] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555739e62f60 [ 31.255180] R13: 00007fff63a7ed70 R14: 00007fff63a7eda0 R15: 00007fff63a7f100 [ 31.255796] [ 31.256009] [ 31.256168] Allocated by task 213: [ 31.256470] kasan_save_stack+0x22/0x50 [ 31.256827] kasan_set_track+0x25/0x30 [ 31.257169] __kasan_slab_alloc+0x59/0x70 [ 31.257519] kmem_cache_alloc+0x16b/0x370 [ 31.257856] vm_area_dup+0x20/0x160 [ 31.258150] __split_vma+0x170/0x950 [ 31.258448] split_vma+0xc6/0x110 [ 31.258726] mprotect_fixup+0x8d2/0xb30 [ 31.259046] do_mprotect_pkey+0x87e/0xd40 [ 31.259378] __x64_sys_mprotect+0x78/0xc0 [ 31.259711] do_syscall_64+0x3f/0x90 [ 31.260010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.260416] [ 31.260555] Freed by task 203: [ 31.260801] kasan_save_stack+0x22/0x50 [ 31.261120] kasan_set_track+0x25/0x30 [ 31.261431] kasan_save_free_info+0x2b/0x50 [ 31.261766] __kasan_slab_free+0x10a/0x190 [ 31.262467] kmem_cache_free+0x10d/0x4d0 [ 31.263129] rcu_core+0x8c8/0x2860 [ 31.263696] __do_softirq+0x1b7/0x7d4 [ 31.264297] [ 31.264572] Last potentially related work creation: [ 31.265330] kasan_save_stack+0x22/0x50 [ 31.266004] __kasan_record_aux_stack+0x8e/0xa0 [ 31.266650] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.267328] remove_vma+0x139/0x170 [ 31.267827] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.268455] do_vmi_munmap+0x1f1/0x2b0 [ 31.269006] __vm_munmap+0x138/0x3a0 [ 31.269533] __x64_sys_munmap+0x59/0x80 [ 31.270083] do_syscall_64+0x3f/0x90 [ 31.270612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271345] [ 31.271565] The buggy address belongs to the object at ffff88801a20f488 [ 31.271565] which belongs to the cache vm_area_struct of size 168 [ 31.273028] The buggy address is located 88 bytes inside of [ 31.273028] freed 168-byte region [ffff88801a20f488, ffff88801a20f530) [ 31.274451] [ 31.274666] The buggy address belongs to the physical page: [ 31.275319] page:00000000367e780c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a20f [ 31.276417] memcg:ffff88800cbc6101 [ 31.276832] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.277481] page_type: 0xffffffff() [ 31.277959] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.278886] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbc6101 [ 31.279794] page dumped because: kasan: bad access detected [ 31.280469] [ 31.280689] Memory state around the buggy address: [ 31.281275] ffff88801a20f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.282153] ffff88801a20f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.282991] >ffff88801a20f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.283845] ^ [ 31.284603] ffff88801a20f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.285448] ffff88801a20f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.286320] ================================================================== [ 31.287298] Disabling lock debugging due to kernel taint [ 33.220317] BUG: Bad rss-counter state mm:000000001bf78e3f type:MM_FILEPAGES val:33 [ 33.221497] BUG: Bad rss-counter state mm:000000001bf78e3f type:MM_ANONPAGES val:22 [ 33.604367] BUG: Bad rss-counter state mm:00000000e68d0617 type:MM_FILEPAGES val:33 [ 33.605404] BUG: Bad rss-counter state mm:00000000e68d0617 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3679' (ECDSA) to the list of known hosts. 2023/06/20 13:10:48 fuzzer started 2023/06/20 13:10:48 dialing manager at localhost:36067 2023/06/20 13:10:48 checking machine... 2023/06/20 13:10:48 checking revisions... [ 34.312368] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:10:49 testing simple program... [ 34.374376] cgroup: Unknown subsys name 'net' [ 34.418680] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:10:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff8880147a7408 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000090f0000090f R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f8e466ab900 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=00007fff567ae000 CR3=000000000c9ee000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81105bc3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888008e07dc8 RSP=ffff88806cf09ff0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806cf09ff8 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8118dd30 RFL=00000002 [-------] 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 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=00007feb37561008 CR3=000000000db68000 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=2038343a30313a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a30313a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000