syzkaller login: [ 39.335012] BUG: Bad rss-counter state mm:00000000c3e2d0a6 type:MM_FILEPAGES val:33 [ 39.336045] BUG: Bad rss-counter state mm:00000000c3e2d0a6 type:MM_ANONPAGES val:22 [ 39.506679] ================================================================== [ 39.507597] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.508571] Read of size 8 at addr ffff888017d05d08 by task sshd/219 [ 39.509352] [ 39.509674] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.510542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.511561] Call Trace: [ 39.511902] [ 39.512194] dump_stack_lvl+0x91/0xf0 [ 39.512693] print_report+0xcc/0x620 [ 39.513186] ? __virt_addr_valid+0x102/0x340 [ 39.513738] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.514371] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.515014] kasan_report+0xbe/0xf0 [ 39.515503] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.516123] vma_interval_tree_remove+0xc75/0xec0 [ 39.516725] vma_prepare+0xc54/0x11a0 [ 39.517206] __split_vma+0x5af/0x950 [ 39.517675] ? __pfx___split_vma+0x10/0x10 [ 39.518202] ? find_held_lock+0x2c/0x110 [ 39.518734] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.519297] ? lock_is_held_type+0x9f/0x120 [ 39.519831] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.520437] ? mtree_range_walk+0x632/0x900 [ 39.520982] ? mas_walk+0x5c7/0x7c0 [ 39.521454] do_vmi_munmap+0x1f1/0x2b0 [ 39.521950] mmap_region+0x1f9/0x2660 [ 39.522430] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.522958] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.523675] ? __pfx_lock_acquire+0x10/0x10 [ 39.524212] ? __pfx_mmap_region+0x10/0x10 [ 39.524740] ? security_mmap_addr+0x7d/0xa0 [ 39.525286] ? get_unmapped_area+0x1f5/0x3f0 [ 39.525829] do_mmap+0x854/0xf00 [ 39.526269] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.526773] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.527335] ksys_mmap_pgoff+0x3af/0x500 [ 39.527837] do_syscall_64+0x3f/0x90 [ 39.528323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.528961] RIP: 0033:0x7f8d64e7cd82 [ 39.529426] 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 [ 39.531556] RSP: 002b:00007ffe02b58c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.532467] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d64e7cd82 [ 39.533322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d642b6000 [ 39.534193] RBP: 00007f8d642b6000 R08: 0000000000000009 R09: 0000000000001000 [ 39.535068] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d3e7c3ec0 [ 39.535933] R13: 00007ffe02b58c80 R14: 00007ffe02b58cb0 R15: 00007ffe02b59010 [ 39.536804] [ 39.537107] [ 39.537325] Allocated by task 212: [ 39.537755] kasan_save_stack+0x22/0x50 [ 39.538268] kasan_set_track+0x25/0x30 [ 39.538789] __kasan_slab_alloc+0x59/0x70 [ 39.539326] kmem_cache_alloc+0x16b/0x370 [ 39.539847] vm_area_dup+0x20/0x160 [ 39.540317] __split_vma+0x170/0x950 [ 39.540788] split_vma+0xc6/0x110 [ 39.541238] mprotect_fixup+0x8d2/0xb30 [ 39.541756] do_mprotect_pkey+0x87e/0xd40 [ 39.542289] __x64_sys_mprotect+0x78/0xc0 [ 39.542830] do_syscall_64+0x3f/0x90 [ 39.543314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.543977] [ 39.544192] Freed by task 212: [ 39.544588] kasan_save_stack+0x22/0x50 [ 39.545085] kasan_set_track+0x25/0x30 [ 39.545573] kasan_save_free_info+0x2b/0x50 [ 39.546112] __kasan_slab_free+0x10a/0x190 [ 39.546650] kmem_cache_free+0x10d/0x4d0 [ 39.547162] rcu_core+0x8c8/0x2860 [ 39.547615] __do_softirq+0x1b7/0x7d4 [ 39.548088] [ 39.548302] Last potentially related work creation: [ 39.548884] kasan_save_stack+0x22/0x50 [ 39.549387] __kasan_record_aux_stack+0x8e/0xa0 [ 39.549954] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.550613] remove_vma+0x139/0x170 [ 39.551072] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.551634] do_vmi_munmap+0x1f1/0x2b0 [ 39.552126] __vm_munmap+0x138/0x3a0 [ 39.552589] __x64_sys_munmap+0x59/0x80 [ 39.553079] do_syscall_64+0x3f/0x90 [ 39.553553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.554192] [ 39.554409] The buggy address belongs to the object at ffff888017d05cb0 [ 39.554409] which belongs to the cache vm_area_struct of size 168 [ 39.555869] The buggy address is located 88 bytes inside of [ 39.555869] freed 168-byte region [ffff888017d05cb0, ffff888017d05d58) [ 39.557265] [ 39.557483] The buggy address belongs to the physical page: [ 39.558144] page:000000005e93203e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d05 [ 39.559245] memcg:ffff888017d03101 [ 39.559676] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.560323] page_type: 0xffffffff() [ 39.560778] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.561686] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017d03101 [ 39.562605] page dumped because: kasan: bad access detected [ 39.563275] [ 39.563491] Memory state around the buggy address: [ 39.564069] ffff888017d05c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.564921] ffff888017d05c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.565776] >ffff888017d05d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.566636] ^ [ 39.567076] ffff888017d05d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.567922] ffff888017d05e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.568767] ================================================================== [ 39.570138] Disabling lock debugging due to kernel taint [ 41.598921] BUG: Bad rss-counter state mm:000000009eb36be8 type:MM_FILEPAGES val:33 [ 41.599978] BUG: Bad rss-counter state mm:000000009eb36be8 type:MM_ANONPAGES val:22 [ 42.107151] BUG: Bad rss-counter state mm:00000000440cfa56 type:MM_FILEPAGES val:33 [ 42.108977] BUG: Bad rss-counter state mm:00000000440cfa56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31913' (ECDSA) to the list of known hosts. 2023/06/19 11:29:26 fuzzer started 2023/06/19 11:29:26 dialing manager at localhost:44161 2023/06/19 11:29:26 checking machine... 2023/06/19 11:29:26 checking revisions... [ 42.935535] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:29:26 testing simple program... [ 42.996650] cgroup: Unknown subsys name 'net' [ 43.039454] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:29:16 Registers: info registers vcpu 0 RAX=ffffffff81288f48 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff81288f48 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba82 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e2ed7a0 RIP=ffffffff813ad420 RFL=00000286 [--S--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 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=00007ffd30c28248 CR3=000000000d9cc000 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=2035323a39323a3131203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a39323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11002848f47 RCX=0000000000000000 RDX=ffff88800e68b680 RSI=ffffffff818fb0bf RDI=0000000000000001 RBP=ffff888014247ac0 RSP=ffff888014247a28 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff8880102a5900 R13=0000000000000006 R14=ffff888016292068 R15=ffff888016292068 RIP=ffffffff818dfdc2 RFL=00000293 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4617b79900 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=00007f4616f87880 CR3=000000000d53c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c8d01cd6c14c2af100000000000ae988 XMM05=8244d7ea57a2f9af00000000001357f8 XMM06=806171799158d96700000000001345e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000