syzkaller login: [ 31.023127] BUG: Bad rss-counter state mm:00000000efd837b5 type:MM_FILEPAGES val:33 [ 31.024150] BUG: Bad rss-counter state mm:00000000efd837b5 type:MM_ANONPAGES val:22 [ 31.183757] ================================================================== [ 31.184674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.185623] Read of size 8 at addr ffff888016a99968 by task sshd/220 [ 31.186392] [ 31.186766] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.187668] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.188650] Call Trace: [ 31.188995] [ 31.189278] dump_stack_lvl+0x91/0xf0 [ 31.189781] print_report+0xcc/0x620 [ 31.190273] ? __virt_addr_valid+0x102/0x340 [ 31.190842] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.191489] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.192115] kasan_report+0xbe/0xf0 [ 31.192599] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193217] vma_interval_tree_remove+0xc75/0xec0 [ 31.193830] vma_prepare+0xc54/0x11a0 [ 31.194306] __split_vma+0x5af/0x950 [ 31.194784] ? __pfx___split_vma+0x10/0x10 [ 31.195338] ? find_held_lock+0x2c/0x110 [ 31.195870] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.196437] ? lock_is_held_type+0x9f/0x120 [ 31.196979] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.197582] ? mtree_range_walk+0x632/0x900 [ 31.198151] ? mas_walk+0x5c7/0x7c0 [ 31.198633] do_vmi_munmap+0x1f1/0x2b0 [ 31.199140] mmap_region+0x1f9/0x2660 [ 31.199620] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.200136] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.200856] ? __pfx_lock_acquire+0x10/0x10 [ 31.201385] ? __pfx_mmap_region+0x10/0x10 [ 31.201921] ? security_mmap_addr+0x7d/0xa0 [ 31.202456] ? get_unmapped_area+0x1f5/0x3f0 [ 31.203035] do_mmap+0x854/0xf00 [ 31.203485] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.203982] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.204549] ksys_mmap_pgoff+0x3af/0x500 [ 31.205056] do_syscall_64+0x3f/0x90 [ 31.205534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206188] RIP: 0033:0x7f584ae8cd82 [ 31.206647] 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 [ 31.208778] RSP: 002b:00007fff00f49ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.209679] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f584ae8cd82 [ 31.210527] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f584a2c6000 [ 31.211385] RBP: 00007f584a2c6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.212231] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dfc7d00f70 [ 31.213083] R13: 00007fff00f4a010 R14: 00007fff00f4a040 R15: 00007fff00f4a3a0 [ 31.213937] [ 31.214229] [ 31.214441] Allocated by task 213: [ 31.214876] kasan_save_stack+0x22/0x50 [ 31.215391] kasan_set_track+0x25/0x30 [ 31.215893] __kasan_slab_alloc+0x59/0x70 [ 31.216424] kmem_cache_alloc+0x16b/0x370 [ 31.216944] vm_area_dup+0x20/0x160 [ 31.217402] __split_vma+0x170/0x950 [ 31.217871] split_vma+0xc6/0x110 [ 31.218319] mprotect_fixup+0x8d2/0xb30 [ 31.218818] do_mprotect_pkey+0x87e/0xd40 [ 31.219353] __x64_sys_mprotect+0x78/0xc0 [ 31.219881] do_syscall_64+0x3f/0x90 [ 31.220358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.221007] [ 31.221220] Freed by task 213: [ 31.221610] kasan_save_stack+0x22/0x50 [ 31.222108] kasan_set_track+0x25/0x30 [ 31.222604] kasan_save_free_info+0x2b/0x50 [ 31.223130] __kasan_slab_free+0x10a/0x190 [ 31.223651] kmem_cache_free+0x10d/0x4d0 [ 31.224149] rcu_core+0x8c8/0x2860 [ 31.224584] __do_softirq+0x1b7/0x7d4 [ 31.225051] [ 31.225262] Last potentially related work creation: [ 31.225834] kasan_save_stack+0x22/0x50 [ 31.226328] __kasan_record_aux_stack+0x8e/0xa0 [ 31.226887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.227525] remove_vma+0x139/0x170 [ 31.227967] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.228558] do_vmi_munmap+0x1f1/0x2b0 [ 31.229034] __vm_munmap+0x138/0x3a0 [ 31.229489] __x64_sys_munmap+0x59/0x80 [ 31.229975] do_syscall_64+0x3f/0x90 [ 31.230436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231074] [ 31.231288] Second to last potentially related work creation: [ 31.231955] kasan_save_stack+0x22/0x50 [ 31.232450] __kasan_record_aux_stack+0x8e/0xa0 [ 31.233014] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.233641] remove_vma+0x139/0x170 [ 31.234091] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.234635] do_vmi_munmap+0x1f1/0x2b0 [ 31.235125] __vm_munmap+0x138/0x3a0 [ 31.235584] __x64_sys_munmap+0x59/0x80 [ 31.236067] do_syscall_64+0x3f/0x90 [ 31.236531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237157] [ 31.237372] The buggy address belongs to the object at ffff888016a99910 [ 31.237372] which belongs to the cache vm_area_struct of size 168 [ 31.238795] The buggy address is located 88 bytes inside of [ 31.238795] freed 168-byte region [ffff888016a99910, ffff888016a999b8) [ 31.240159] [ 31.240374] The buggy address belongs to the physical page: [ 31.241018] page:0000000078e10b33 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a99 [ 31.242075] memcg:ffff88800db76201 [ 31.242493] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.243125] page_type: 0xffffffff() [ 31.243569] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.244454] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db76201 [ 31.245338] page dumped because: kasan: bad access detected [ 31.245986] [ 31.246195] Memory state around the buggy address: [ 31.246763] ffff888016a99800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.247605] ffff888016a99880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.248435] >ffff888016a99900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.249269] ^ [ 31.250026] ffff888016a99980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.250856] ffff888016a99a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.251681] ================================================================== [ 31.252780] Disabling lock debugging due to kernel taint [ 33.538822] BUG: Bad rss-counter state mm:00000000da73d028 type:MM_FILEPAGES val:33 [ 33.540057] BUG: Bad rss-counter state mm:00000000da73d028 type:MM_ANONPAGES val:22 [ 34.038935] BUG: Bad rss-counter state mm:0000000052f9cce8 type:MM_FILEPAGES val:33 [ 34.040356] BUG: Bad rss-counter state mm:0000000052f9cce8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36801' (ECDSA) to the list of known hosts. 2023/06/20 18:26:28 fuzzer started 2023/06/20 18:26:28 dialing manager at localhost:36067 2023/06/20 18:26:28 checking machine... 2023/06/20 18:26:28 checking revisions... [ 34.723919] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:26:28 testing simple program... [ 34.786530] cgroup: Unknown subsys name 'net' [ 34.854840] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:26:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffe6b7862f8 CR3=000000000d91c000 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=2037323a36323a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a36323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000036aca2a0 RBX=000000000dab28a8 RCX=0000000000000000 RDX=0000000000000007 RSI=ffffffff81b2ac2b RDI=ffff88800e10528c RBP=ffff8880165c0c98 RSP=ffff8880147df728 R8 =0000000000000005 R9 =000000000000008f R10=00000000000000a0 R11=00000000000b6d53 R12=ffff88800e105200 R13=00000000000000a0 R14=ffff8880165c0a38 R15=0000000000000000 RIP=ffffffff814c0864 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007febcb84b900 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=00007febcac5d0b0 CR3=000000000b35c000 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=c041fec5a02d8e8d00000000000ae988 XMM05=b942c92e90218e260000000000134058 XMM06=4fda316b135da52b0000000000132e48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000