syzkaller login: [ 30.598060] BUG: Bad rss-counter state mm:000000003c26bf81 type:MM_FILEPAGES val:33 [ 30.599246] BUG: Bad rss-counter state mm:000000003c26bf81 type:MM_ANONPAGES val:22 [ 30.740412] ================================================================== [ 30.741507] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.742615] Read of size 8 at addr ffff88800d7243f8 by task sshd/219 [ 30.743657] [ 30.743916] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.744933] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.746092] Call Trace: [ 30.746475] <TASK> [ 30.746815] dump_stack_lvl+0x91/0xf0 [ 30.747398] print_report+0xcc/0x620 [ 30.747976] ? __virt_addr_valid+0x102/0x340 [ 30.748632] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749389] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750083] kasan_report+0xbe/0xf0 [ 30.750556] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.751181] vma_interval_tree_remove+0xc75/0xec0 [ 30.751774] vma_prepare+0xc54/0x11a0 [ 30.752251] __split_vma+0x5af/0x950 [ 30.752722] ? __pfx___split_vma+0x10/0x10 [ 30.753255] ? find_held_lock+0x2c/0x110 [ 30.753783] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.754343] ? lock_is_held_type+0x9f/0x120 [ 30.754883] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.755489] ? mtree_range_walk+0x632/0x900 [ 30.756047] ? mas_walk+0x5c7/0x7c0 [ 30.756523] do_vmi_munmap+0x1f1/0x2b0 [ 30.757021] mmap_region+0x1f9/0x2660 [ 30.757522] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.758033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.758756] ? __pfx_lock_acquire+0x10/0x10 [ 30.759288] ? __pfx_mmap_region+0x10/0x10 [ 30.759823] ? security_mmap_addr+0x7d/0xa0 [ 30.760357] ? get_unmapped_area+0x1f5/0x3f0 [ 30.760911] do_mmap+0x854/0xf00 [ 30.761378] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.761871] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.762432] ksys_mmap_pgoff+0x3af/0x500 [ 30.762931] do_syscall_64+0x3f/0x90 [ 30.763407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764055] RIP: 0033:0x7f1cc5c03d82 [ 30.764508] 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 [ 30.766642] RSP: 002b:00007ffff269fe38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.767560] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1cc5c03d82 [ 30.768413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1cc503d000 [ 30.769263] RBP: 00007f1cc503d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.770141] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ed983ff70 [ 30.770981] R13: 00007ffff269fe50 R14: 00007ffff269fe80 R15: 00007ffff26a01e0 [ 30.771821] </TASK> [ 30.772124] [ 30.772341] Allocated by task 212: [ 30.772768] kasan_save_stack+0x22/0x50 [ 30.773274] kasan_set_track+0x25/0x30 [ 30.773776] __kasan_slab_alloc+0x59/0x70 [ 30.774298] kmem_cache_alloc+0x16b/0x370 [ 30.774811] vm_area_dup+0x20/0x160 [ 30.775261] __split_vma+0x170/0x950 [ 30.775729] split_vma+0xc6/0x110 [ 30.776171] mprotect_fixup+0x8d2/0xb30 [ 30.776675] do_mprotect_pkey+0x87e/0xd40 [ 30.777193] __x64_sys_mprotect+0x78/0xc0 [ 30.777720] do_syscall_64+0x3f/0x90 [ 30.778193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.778835] [ 30.779050] Freed by task 209: [ 30.779440] kasan_save_stack+0x22/0x50 [ 30.779943] kasan_set_track+0x25/0x30 [ 30.780432] kasan_save_free_info+0x2b/0x50 [ 30.780964] __kasan_slab_free+0x10a/0x190 [ 30.781513] kmem_cache_free+0x10d/0x4d0 [ 30.782023] rcu_core+0x8c8/0x2860 [ 30.782471] __do_softirq+0x1b7/0x7d4 [ 30.782944] [ 30.783159] Last potentially related work creation: [ 30.783743] kasan_save_stack+0x22/0x50 [ 30.784316] __kasan_record_aux_stack+0x8e/0xa0 [ 30.784880] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.785531] remove_vma+0x139/0x170 [ 30.785983] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.786542] do_vmi_munmap+0x1f1/0x2b0 [ 30.787026] __vm_munmap+0x138/0x3a0 [ 30.787493] __x64_sys_munmap+0x59/0x80 [ 30.787990] do_syscall_64+0x3f/0x90 [ 30.788468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789108] [ 30.789341] The buggy address belongs to the object at ffff88800d7243a0 [ 30.789341] which belongs to the cache vm_area_struct of size 168 [ 30.790799] The buggy address is located 88 bytes inside of [ 30.790799] freed 168-byte region [ffff88800d7243a0, ffff88800d724448) [ 30.792208] [ 30.792422] The buggy address belongs to the physical page: [ 30.793075] page:000000001be4cfa2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd724 [ 30.794168] memcg:ffff88800ea2f401 [ 30.794596] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.795242] page_type: 0xffffffff() [ 30.795697] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.796621] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea2f401 [ 30.797547] page dumped because: kasan: bad access detected [ 30.798203] [ 30.798419] Memory state around the buggy address: [ 30.798993] ffff88800d724280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.799843] ffff88800d724300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.800687] >ffff88800d724380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.801545] ^ [ 30.802395] ffff88800d724400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.803253] ffff88800d724480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.804111] ================================================================== [ 30.805030] Disabling lock debugging due to kernel taint [ 33.071491] BUG: Bad rss-counter state mm:000000004ca89c19 type:MM_FILEPAGES val:33 [ 33.072703] BUG: Bad rss-counter state mm:000000004ca89c19 type:MM_ANONPAGES val:22 [ 33.537592] BUG: Bad rss-counter state mm:0000000006b13565 type:MM_FILEPAGES val:33 [ 33.538878] BUG: Bad rss-counter state mm:0000000006b13565 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9121' (ECDSA) to the list of known hosts. 2023/06/21 03:17:00 fuzzer started 2023/06/21 03:17:01 dialing manager at localhost:36067 2023/06/21 03:17:01 checking machine... 2023/06/21 03:17:01 checking revisions... [ 34.204325] BUG: Bad rss-counter state mm:000000008359e383 type:MM_FILEPAGES val:185 [ 34.205393] BUG: Bad rss-counter state mm:000000008359e383 type:MM_ANONPAGES val:50 [ 34.211709] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:17:01 testing simple program... [ 34.278488] cgroup: Unknown subsys name 'net' [ 34.320317] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:17:00 Registers: info registers vcpu 0 RAX=ffff888008da0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d9fc01 RSI=ffff888008d9fcd0 RDI=ffff888008d9f988 RBP=ffff888008d9fcd0 RSP=ffff888008d9f8e0 R8 =ffffffff86138eb4 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020d9c R12=0000000000000008 R13=ffff888008d98000 R14=ffff888008d9fcd8 R15=ffff888008d9f978 RIP=ffffffff811304ce 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=00007fde2dfaa650 CR3=000000001bc2e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c0df8f RBX=ffff88800e06fc48 RCX=ffffffff84536871 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e06fc78 RBP=ffff88800c16c2f0 RSP=ffff888008e37cb8 R8 =0000000000000001 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800c16c178 R14=ffffffff813782f8 R15=ffff88800d945080 RIP=ffffffff818464e2 RFL=00000046 [---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 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=00007f583f2c7e10 CR3=000000000d6e6000 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=547957b99c627cb2fe4410d29a185608 XMM02=000000000011cf00d59e07bde36eea69 XMM03=000000000011d028ec2efd57dc4c00df XMM04=bc271a390624ed1600000000000ae988 XMM05=8241afab95c29e2d0000000000132750 XMM06=806171799158d9670000000000131540 XMM07=fb795ef6d657705600000000001217c8 XMM08=2c67c8bc2e329bc3000000000011d028 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000