syzkaller login: [ 31.138109] BUG: Bad rss-counter state mm:0000000079af2a75 type:MM_FILEPAGES val:33 [ 31.139362] BUG: Bad rss-counter state mm:0000000079af2a75 type:MM_ANONPAGES val:22 [ 31.192444] ================================================================== [ 31.193498] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.194601] Read of size 8 at addr ffff888018415058 by task sshd/220 [ 31.195501] [ 31.195757] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.196812] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.197785] Call Trace: [ 31.198218] [ 31.198556] dump_stack_lvl+0x91/0xf0 [ 31.199040] print_report+0xcc/0x620 [ 31.199517] ? __virt_addr_valid+0x102/0x340 [ 31.200070] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.200703] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201312] kasan_report+0xbe/0xf0 [ 31.201787] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202432] vma_interval_tree_remove+0xc75/0xec0 [ 31.203060] vma_prepare+0xc54/0x11a0 [ 31.203556] __split_vma+0x5af/0x950 [ 31.204058] ? __pfx___split_vma+0x10/0x10 [ 31.204604] ? find_held_lock+0x2c/0x110 [ 31.205141] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.205728] ? lock_is_held_type+0x9f/0x120 [ 31.206285] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.206913] ? mtree_range_walk+0x632/0x900 [ 31.207480] ? mas_walk+0x5c7/0x7c0 [ 31.207972] do_vmi_munmap+0x1f1/0x2b0 [ 31.208488] mmap_region+0x1f9/0x2660 [ 31.208987] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.209519] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.210264] ? __pfx_lock_acquire+0x10/0x10 [ 31.210809] ? __pfx_mmap_region+0x10/0x10 [ 31.211357] ? security_mmap_addr+0x7d/0xa0 [ 31.211924] ? get_unmapped_area+0x1f5/0x3f0 [ 31.212491] do_mmap+0x854/0xf00 [ 31.212952] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.213478] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.214053] ksys_mmap_pgoff+0x3af/0x500 [ 31.214585] do_syscall_64+0x3f/0x90 [ 31.215074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.215789] RIP: 0033:0x7f3c9bebad82 [ 31.216262] 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 [ 31.218410] RSP: 002b:00007ffc2e1f4e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.219334] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c9bebad82 [ 31.220210] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c9b2f4000 [ 31.221055] RBP: 00007f3c9b2f4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.221900] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564db5e38ec0 [ 31.222752] R13: 00007ffc2e1f4e60 R14: 00007ffc2e1f4e90 R15: 00007ffc2e1f51f0 [ 31.223623] [ 31.223933] [ 31.224151] Allocated by task 213: [ 31.224587] kasan_save_stack+0x22/0x50 [ 31.225089] kasan_set_track+0x25/0x30 [ 31.225582] __kasan_slab_alloc+0x59/0x70 [ 31.226101] kmem_cache_alloc+0x16b/0x370 [ 31.226615] vm_area_dup+0x20/0x160 [ 31.227067] __split_vma+0x170/0x950 [ 31.227543] split_vma+0xc6/0x110 [ 31.228005] mprotect_fixup+0x8d2/0xb30 [ 31.228507] do_mprotect_pkey+0x87e/0xd40 [ 31.229034] __x64_sys_mprotect+0x78/0xc0 [ 31.229554] do_syscall_64+0x3f/0x90 [ 31.230025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.230669] [ 31.230883] Freed by task 213: [ 31.231272] kasan_save_stack+0x22/0x50 [ 31.231777] kasan_set_track+0x25/0x30 [ 31.232271] kasan_save_free_info+0x2b/0x50 [ 31.232803] __kasan_slab_free+0x10a/0x190 [ 31.233335] kmem_cache_free+0x10d/0x4d0 [ 31.233840] rcu_core+0x8c8/0x2860 [ 31.234280] __do_softirq+0x1b7/0x7d4 [ 31.234758] [ 31.234974] Last potentially related work creation: [ 31.235560] kasan_save_stack+0x22/0x50 [ 31.236077] __kasan_record_aux_stack+0x8e/0xa0 [ 31.236653] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.237288] remove_vma+0x139/0x170 [ 31.237739] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.238291] do_vmi_munmap+0x1f1/0x2b0 [ 31.238773] __vm_munmap+0x138/0x3a0 [ 31.239241] __x64_sys_munmap+0x59/0x80 [ 31.239733] do_syscall_64+0x3f/0x90 [ 31.240227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240864] [ 31.241078] The buggy address belongs to the object at ffff888018415000 [ 31.241078] which belongs to the cache vm_area_struct of size 168 [ 31.242552] The buggy address is located 88 bytes inside of [ 31.242552] freed 168-byte region [ffff888018415000, ffff8880184150a8) [ 31.243949] [ 31.244164] The buggy address belongs to the physical page: [ 31.244816] page:0000000019c0499e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18415 [ 31.245906] memcg:ffff888019d44f01 [ 31.246333] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.247034] page_type: 0xffffffff() [ 31.247488] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 31.248414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d44f01 [ 31.249322] page dumped because: kasan: bad access detected [ 31.249980] [ 31.250195] Memory state around the buggy address: [ 31.250769] ffff888018414f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.251624] ffff888018414f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.252504] >ffff888018415000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.253351] ^ [ 31.254082] ffff888018415080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.254932] ffff888018415100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.255796] ================================================================== [ 31.256817] Disabling lock debugging due to kernel taint [ 33.487926] BUG: Bad rss-counter state mm:000000002c7fc258 type:MM_FILEPAGES val:33 [ 33.488932] BUG: Bad rss-counter state mm:000000002c7fc258 type:MM_ANONPAGES val:22 [ 33.960124] BUG: Bad rss-counter state mm:00000000eeee41c0 type:MM_FILEPAGES val:33 [ 33.960868] BUG: Bad rss-counter state mm:00000000eeee41c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3096' (ECDSA) to the list of known hosts. 2023/06/20 20:05:14 fuzzer started 2023/06/20 20:05:14 dialing manager at localhost:36067 2023/06/20 20:05:14 checking machine... 2023/06/20 20:05:14 checking revisions... [ 34.602859] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:05:14 testing simple program... [ 34.652941] cgroup: Unknown subsys name 'net' [ 34.692148] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:05:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e473000 RCX=ffff88800844f780 RDX=ffffea0000391cc0 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff8880169e7918 R8 =ffff88800e473000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=dffffc0000000000 R13=ffff8880169e7958 R14=ffff88800844f780 R15=ffff888009427980 RIP=ffffffff818103b7 RFL=00000202 [-------] 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 00007f4f24be5700 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=00007f718744ce80 CR3=000000000f0ba000 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=2033313a35303a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a35303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8613961e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801c99faf8 RSP=ffff88801c99fa30 R8 =ffffffff86139622 R9 =ffff88801c99fae0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88801c99fb00 R13=ffff88801c99fae8 R14=ffff88801c99fe10 R15=ffff88801c99faa0 RIP=ffffffff81130bc6 RFL=00000297 [--S-APC] 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 00007fb60748a900 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=00007ffd14881000 CR3=000000001a240000 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=6720646572637465733a4d41503d706f 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