syzkaller login: [ 31.171232] BUG: Bad rss-counter state mm:0000000073301aa6 type:MM_FILEPAGES val:33 [ 31.172482] BUG: Bad rss-counter state mm:0000000073301aa6 type:MM_ANONPAGES val:22 [ 31.208876] ================================================================== [ 31.209881] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.210827] Read of size 8 at addr ffff88800939b228 by task sshd/222 [ 31.211667] [ 31.211886] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.212757] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.213766] Call Trace: [ 31.214085] [ 31.214375] dump_stack_lvl+0x91/0xf0 [ 31.214864] print_report+0xcc/0x620 [ 31.215355] ? __virt_addr_valid+0x102/0x340 [ 31.215907] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.216526] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217142] kasan_report+0xbe/0xf0 [ 31.217624] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.218248] vma_interval_tree_remove+0xc75/0xec0 [ 31.218854] vma_prepare+0xc54/0x11a0 [ 31.219332] __split_vma+0x5af/0x950 [ 31.219804] ? __pfx___split_vma+0x10/0x10 [ 31.220334] ? find_held_lock+0x2c/0x110 [ 31.220858] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.221449] ? lock_is_held_type+0x9f/0x120 [ 31.221990] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.222603] ? mtree_range_walk+0x632/0x900 [ 31.223157] ? mas_walk+0x5c7/0x7c0 [ 31.223635] do_vmi_munmap+0x1f1/0x2b0 [ 31.224133] mmap_region+0x1f9/0x2660 [ 31.224616] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.225128] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.225849] ? __pfx_lock_acquire+0x10/0x10 [ 31.226394] ? __pfx_mmap_region+0x10/0x10 [ 31.226926] ? security_mmap_addr+0x7d/0xa0 [ 31.227460] ? get_unmapped_area+0x1f5/0x3f0 [ 31.228014] do_mmap+0x854/0xf00 [ 31.228452] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.228942] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.229525] ksys_mmap_pgoff+0x3af/0x500 [ 31.230033] do_syscall_64+0x3f/0x90 [ 31.230511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231162] RIP: 0033:0x7f943c3b1d82 [ 31.231615] 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 [ 31.233745] RSP: 002b:00007ffdfb5d81b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.234648] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f943c3b1d82 [ 31.235496] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f943b7eb000 [ 31.236352] RBP: 00007f943b7eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.237208] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560399e68f70 [ 31.238072] R13: 00007ffdfb5d81d0 R14: 00007ffdfb5d8200 R15: 00007ffdfb5d8560 [ 31.238938] [ 31.239232] [ 31.239446] Allocated by task 215: [ 31.239876] kasan_save_stack+0x22/0x50 [ 31.240385] kasan_set_track+0x25/0x30 [ 31.240876] __kasan_slab_alloc+0x59/0x70 [ 31.241418] kmem_cache_alloc+0x16b/0x370 [ 31.241935] vm_area_dup+0x20/0x160 [ 31.242392] __split_vma+0x170/0x950 [ 31.242855] split_vma+0xc6/0x110 [ 31.243297] mprotect_fixup+0x8d2/0xb30 [ 31.243795] do_mprotect_pkey+0x87e/0xd40 [ 31.244316] __x64_sys_mprotect+0x78/0xc0 [ 31.244849] do_syscall_64+0x3f/0x90 [ 31.245326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245980] [ 31.246196] Freed by task 215: [ 31.246591] kasan_save_stack+0x22/0x50 [ 31.247096] kasan_set_track+0x25/0x30 [ 31.247588] kasan_save_free_info+0x2b/0x50 [ 31.248120] __kasan_slab_free+0x10a/0x190 [ 31.248657] kmem_cache_free+0x10d/0x4d0 [ 31.249162] rcu_core+0x8c8/0x2860 [ 31.249612] __do_softirq+0x1b7/0x7d4 [ 31.250089] [ 31.250303] Last potentially related work creation: [ 31.250892] kasan_save_stack+0x22/0x50 [ 31.251392] __kasan_record_aux_stack+0x8e/0xa0 [ 31.251941] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.252552] remove_vma+0x139/0x170 [ 31.252982] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.253528] do_vmi_munmap+0x1f1/0x2b0 [ 31.253991] __vm_munmap+0x138/0x3a0 [ 31.254436] __x64_sys_munmap+0x59/0x80 [ 31.254907] do_syscall_64+0x3f/0x90 [ 31.255359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.255975] [ 31.256184] The buggy address belongs to the object at ffff88800939b1d0 [ 31.256184] which belongs to the cache vm_area_struct of size 168 [ 31.257633] The buggy address is located 88 bytes inside of [ 31.257633] freed 168-byte region [ffff88800939b1d0, ffff88800939b278) [ 31.259033] [ 31.259247] The buggy address belongs to the physical page: [ 31.259904] page:0000000082c78d80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x939b [ 31.260979] memcg:ffff88800f6ecf01 [ 31.261417] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.262059] page_type: 0xffffffff() [ 31.262503] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.263413] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6ecf01 [ 31.264323] page dumped because: kasan: bad access detected [ 31.264978] [ 31.265190] Memory state around the buggy address: [ 31.265772] ffff88800939b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.266628] ffff88800939b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.267479] >ffff88800939b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.268329] ^ [ 31.268866] ffff88800939b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.269714] ffff88800939b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.270563] ================================================================== [ 31.271588] Disabling lock debugging due to kernel taint [ 33.198158] BUG: Bad rss-counter state mm:00000000ab2dce24 type:MM_FILEPAGES val:33 [ 33.199443] BUG: Bad rss-counter state mm:00000000ab2dce24 type:MM_ANONPAGES val:22 [ 33.553326] BUG: Bad rss-counter state mm:000000000e4614fa type:MM_FILEPAGES val:33 [ 33.554363] BUG: Bad rss-counter state mm:000000000e4614fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53690' (ECDSA) to the list of known hosts. 2023/06/20 19:54:17 fuzzer started 2023/06/20 19:54:18 dialing manager at localhost:36067 2023/06/20 19:54:18 checking machine... 2023/06/20 19:54:18 checking revisions... [ 34.306901] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:54:18 testing simple program... [ 34.355062] cgroup: Unknown subsys name 'net' [ 34.404139] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:54:17 Registers: info registers vcpu 0 RAX=ffffffff85d3e490 RBX=0000000000000000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff813c8add RSP=ffff8880147ff910 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880147ff9b0 R13=ffffed10028fff37 R14=ffffed10028fff36 R15=ffff8880147ff9b8 RIP=ffffffff812d133c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5603009900 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=00007f560249a020 CR3=000000000cc0c000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=482c1bb4a02ad4ce00000000000ae988 XMM05=050f1ac8434fdd2000000000001320a8 XMM06=db20f175d54767f00000000000131148 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001475f17 RSP=ffff88800a3af8a8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff88800f55f260 RIP=ffffffff812d86f2 RFL=00000247 [---Z-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 00007f21293b2900 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=00007f212996a0b0 CR3=000000000eb34000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000