syzkaller login: [ 39.163425] BUG: Bad rss-counter state mm:00000000c4723260 type:MM_FILEPAGES val:33 [ 39.164509] BUG: Bad rss-counter state mm:00000000c4723260 type:MM_ANONPAGES val:22 [ 39.334767] ================================================================== [ 39.335777] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.336770] Read of size 8 at addr ffff888016573140 by task sshd/220 [ 39.337721] [ 39.337956] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.338887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.339973] Call Trace: [ 39.340314] [ 39.340620] dump_stack_lvl+0x91/0xf0 [ 39.341148] print_report+0xcc/0x620 [ 39.341666] ? __virt_addr_valid+0x102/0x340 [ 39.342258] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.342924] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.343598] kasan_report+0xbe/0xf0 [ 39.344122] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.344811] vma_interval_tree_remove+0xc75/0xec0 [ 39.345469] vma_prepare+0xc54/0x11a0 [ 39.345991] __split_vma+0x5af/0x950 [ 39.346509] ? __pfx___split_vma+0x10/0x10 [ 39.347088] ? find_held_lock+0x2c/0x110 [ 39.347682] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.348308] ? lock_is_held_type+0x9f/0x120 [ 39.348898] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.349561] ? mtree_range_walk+0x632/0x900 [ 39.350162] ? mas_walk+0x5c7/0x7c0 [ 39.350686] do_vmi_munmap+0x1f1/0x2b0 [ 39.351238] mmap_region+0x1f9/0x2660 [ 39.351766] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.352326] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.353110] ? __pfx_lock_acquire+0x10/0x10 [ 39.353695] ? __pfx_mmap_region+0x10/0x10 [ 39.354276] ? security_mmap_addr+0x7d/0xa0 [ 39.354864] ? get_unmapped_area+0x1f5/0x3f0 [ 39.355478] do_mmap+0x854/0xf00 [ 39.355957] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.356501] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.357115] ksys_mmap_pgoff+0x3af/0x500 [ 39.357673] do_syscall_64+0x3f/0x90 [ 39.358196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.358905] RIP: 0033:0x7f2cc202ad82 [ 39.359426] 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 [ 39.361772] RSP: 002b:00007ffda304d6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.362767] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2cc202ad82 [ 39.363704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2cc1464000 [ 39.364632] RBP: 00007f2cc1464000 R08: 0000000000000009 R09: 0000000000001000 [ 39.365564] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562157f9fb20 [ 39.366494] R13: 00007ffda304d6e0 R14: 00007ffda304d710 R15: 00007ffda304da70 [ 39.367462] [ 39.367785] [ 39.368019] Allocated by task 213: [ 39.368491] kasan_save_stack+0x22/0x50 [ 39.369050] kasan_set_track+0x25/0x30 [ 39.369589] __kasan_slab_alloc+0x59/0x70 [ 39.370167] kmem_cache_alloc+0x16b/0x370 [ 39.370731] vm_area_dup+0x20/0x160 [ 39.371240] __split_vma+0x170/0x950 [ 39.371756] split_vma+0xc6/0x110 [ 39.372238] mprotect_fixup+0x8d2/0xb30 [ 39.372789] do_mprotect_pkey+0x87e/0xd40 [ 39.373360] __x64_sys_mprotect+0x78/0xc0 [ 39.373931] do_syscall_64+0x3f/0x90 [ 39.374451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.375155] [ 39.375401] Freed by task 213: [ 39.375830] kasan_save_stack+0x22/0x50 [ 39.376383] kasan_set_track+0x25/0x30 [ 39.376930] kasan_save_free_info+0x2b/0x50 [ 39.377520] __kasan_slab_free+0x10a/0x190 [ 39.378103] kmem_cache_free+0x10d/0x4d0 [ 39.378658] rcu_core+0x8c8/0x2860 [ 39.379146] __do_softirq+0x1b7/0x7d4 [ 39.379686] [ 39.379921] Last potentially related work creation: [ 39.380564] kasan_save_stack+0x22/0x50 [ 39.381114] __kasan_record_aux_stack+0x8e/0xa0 [ 39.381744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.382443] remove_vma+0x139/0x170 [ 39.382945] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.383562] do_vmi_munmap+0x1f1/0x2b0 [ 39.384099] __vm_munmap+0x138/0x3a0 [ 39.384611] __x64_sys_munmap+0x59/0x80 [ 39.385164] do_syscall_64+0x3f/0x90 [ 39.385685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.386385] [ 39.386622] Second to last potentially related work creation: [ 39.387393] kasan_save_stack+0x22/0x50 [ 39.387944] __kasan_record_aux_stack+0x8e/0xa0 [ 39.388571] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.389275] remove_vma+0x139/0x170 [ 39.389769] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.390386] do_vmi_munmap+0x1f1/0x2b0 [ 39.390918] mmap_region+0x1f9/0x2660 [ 39.391447] do_mmap+0x854/0xf00 [ 39.391920] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.392461] ksys_mmap_pgoff+0x3af/0x500 [ 39.393015] do_syscall_64+0x3f/0x90 [ 39.393532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.394220] [ 39.394451] The buggy address belongs to the object at ffff8880165730e8 [ 39.394451] which belongs to the cache vm_area_struct of size 168 [ 39.396038] The buggy address is located 88 bytes inside of [ 39.396038] freed 168-byte region [ffff8880165730e8, ffff888016573190) [ 39.397536] [ 39.397766] The buggy address belongs to the physical page: [ 39.398471] page:00000000a85b159b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16573 [ 39.399646] memcg:ffff888014069301 [ 39.400098] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.400783] page_type: 0xffffffff() [ 39.401274] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 39.402249] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014069301 [ 39.403241] page dumped because: kasan: bad access detected [ 39.403981] [ 39.404218] Memory state around the buggy address: [ 39.404862] ffff888016573000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.405778] ffff888016573080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.406681] >ffff888016573100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.407608] ^ [ 39.408290] ffff888016573180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.409203] ffff888016573200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.410120] ================================================================== [ 39.411184] Disabling lock debugging due to kernel taint [ 41.497236] BUG: Bad rss-counter state mm:0000000035062855 type:MM_FILEPAGES val:33 [ 41.498405] BUG: Bad rss-counter state mm:0000000035062855 type:MM_ANONPAGES val:22 [ 41.891408] BUG: Bad rss-counter state mm:000000005c01db40 type:MM_FILEPAGES val:33 [ 41.891972] BUG: Bad rss-counter state mm:000000005c01db40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46727' (ECDSA) to the list of known hosts. 2023/06/20 08:47:55 fuzzer started 2023/06/20 08:47:56 dialing manager at localhost:44161 2023/06/20 08:47:56 checking machine... 2023/06/20 08:47:56 checking revisions... [ 42.556158] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:47:56 testing simple program... [ 42.623425] cgroup: Unknown subsys name 'net' [ 42.657311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:47:55 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100d9c1329 RCX=ffffffff812d8ec3 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ec3 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 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=00007f78e3513cc0 CR3=000000000fb30000 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=2035353a37343a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a37343a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff83726530 RDX=ffff888019db3680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000002 RSP=ffff88801653f638 R8 =0000000000000005 R9 =0000000000000011 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000001 R13=ffffffff87f96ae8 R14=ffff88800f5a0579 R15=0000000000000006 RIP=ffffffff814c07eb RFL=00000287 [--S--PC] 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 00007f97ba62e900 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=00007ffea4b23000 CR3=000000000c752000 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=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