syzkaller login: [ 38.758915] BUG: Bad rss-counter state mm:000000007069f325 type:MM_FILEPAGES val:33 [ 38.760085] BUG: Bad rss-counter state mm:000000007069f325 type:MM_ANONPAGES val:22 [ 38.908828] ================================================================== [ 38.909731] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.910667] Read of size 8 at addr ffff88800db8d140 by task sshd/219 [ 38.911520] [ 38.911834] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.912704] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.913678] Call Trace: [ 38.914019] [ 38.914306] dump_stack_lvl+0x91/0xf0 [ 38.914797] print_report+0xcc/0x620 [ 38.915297] ? __virt_addr_valid+0x102/0x340 [ 38.915859] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.916485] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.917108] kasan_report+0xbe/0xf0 [ 38.917577] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.918203] vma_interval_tree_remove+0xc75/0xec0 [ 38.918804] vma_prepare+0xc54/0x11a0 [ 38.919292] __split_vma+0x5af/0x950 [ 38.919765] ? __pfx___split_vma+0x10/0x10 [ 38.920290] ? find_held_lock+0x2c/0x110 [ 38.920811] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.921381] ? lock_is_held_type+0x9f/0x120 [ 38.921921] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.922529] ? mtree_range_walk+0x632/0x900 [ 38.923088] ? mas_walk+0x5c7/0x7c0 [ 38.923582] do_vmi_munmap+0x1f1/0x2b0 [ 38.924073] mmap_region+0x1f9/0x2660 [ 38.924557] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.925073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.925789] ? __pfx_lock_acquire+0x10/0x10 [ 38.926323] ? __pfx_mmap_region+0x10/0x10 [ 38.926855] ? security_mmap_addr+0x7d/0xa0 [ 38.927404] ? get_unmapped_area+0x1f5/0x3f0 [ 38.927959] do_mmap+0x854/0xf00 [ 38.928394] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.928894] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.929453] ksys_mmap_pgoff+0x3af/0x500 [ 38.929958] do_syscall_64+0x3f/0x90 [ 38.930441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.931087] RIP: 0033:0x7fbbc02abd82 [ 38.931559] 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 [ 38.933672] RSP: 002b:00007ffd0bb8b558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.934589] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbbc02abd82 [ 38.935456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbbbf6e5000 [ 38.936312] RBP: 00007fbbbf6e5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.937172] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b93330aec0 [ 38.938030] R13: 00007ffd0bb8b570 R14: 00007ffd0bb8b5a0 R15: 00007ffd0bb8b900 [ 38.938894] [ 38.939197] [ 38.939417] Allocated by task 212: [ 38.939844] kasan_save_stack+0x22/0x50 [ 38.940349] kasan_set_track+0x25/0x30 [ 38.940850] __kasan_slab_alloc+0x59/0x70 [ 38.941388] kmem_cache_alloc+0x16b/0x370 [ 38.941907] vm_area_dup+0x20/0x160 [ 38.942364] __split_vma+0x170/0x950 [ 38.942840] split_vma+0xc6/0x110 [ 38.943298] mprotect_fixup+0x8d2/0xb30 [ 38.943801] do_mprotect_pkey+0x87e/0xd40 [ 38.944322] __x64_sys_mprotect+0x78/0xc0 [ 38.944845] do_syscall_64+0x3f/0x90 [ 38.945318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945969] [ 38.946186] Freed by task 212: [ 38.946580] kasan_save_stack+0x22/0x50 [ 38.947084] kasan_set_track+0x25/0x30 [ 38.947585] kasan_save_free_info+0x2b/0x50 [ 38.948118] __kasan_slab_free+0x10a/0x190 [ 38.948649] kmem_cache_free+0x10d/0x4d0 [ 38.949161] rcu_core+0x8c8/0x2860 [ 38.949603] __do_softirq+0x1b7/0x7d4 [ 38.950080] [ 38.950296] Last potentially related work creation: [ 38.950889] kasan_save_stack+0x22/0x50 [ 38.951399] __kasan_record_aux_stack+0x8e/0xa0 [ 38.951970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.952612] remove_vma+0x139/0x170 [ 38.953159] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.953725] do_vmi_munmap+0x1f1/0x2b0 [ 38.954210] __vm_munmap+0x138/0x3a0 [ 38.954681] __x64_sys_munmap+0x59/0x80 [ 38.955176] do_syscall_64+0x3f/0x90 [ 38.955669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956308] [ 38.956523] Second to last potentially related work creation: [ 38.957211] kasan_save_stack+0x22/0x50 [ 38.957716] __kasan_record_aux_stack+0x8e/0xa0 [ 38.958287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.958931] remove_vma+0x139/0x170 [ 38.959396] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.959952] do_vmi_munmap+0x1f1/0x2b0 [ 38.960436] mmap_region+0x1f9/0x2660 [ 38.960912] do_mmap+0x854/0xf00 [ 38.961341] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.961825] ksys_mmap_pgoff+0x3af/0x500 [ 38.962333] do_syscall_64+0x3f/0x90 [ 38.962806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.963473] [ 38.963690] The buggy address belongs to the object at ffff88800db8d0e8 [ 38.963690] which belongs to the cache vm_area_struct of size 168 [ 38.965160] The buggy address is located 88 bytes inside of [ 38.965160] freed 168-byte region [ffff88800db8d0e8, ffff88800db8d190) [ 38.966562] [ 38.966784] The buggy address belongs to the physical page: [ 38.967455] page:0000000025016aae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb8d [ 38.968540] memcg:ffff88800dfee601 [ 38.968976] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.969682] page_type: 0xffffffff() [ 38.970133] raw: 0100000000000200 ffff8880087a0c80 ffffea0000385080 dead000000000005 [ 38.971049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfee601 [ 38.971964] page dumped because: kasan: bad access detected [ 38.972633] [ 38.972848] Memory state around the buggy address: [ 38.973430] ffff88800db8d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.974291] ffff88800db8d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.975150] >ffff88800db8d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.976032] ^ [ 38.976664] ffff88800db8d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.977527] ffff88800db8d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.978379] ================================================================== [ 38.979317] Disabling lock debugging due to kernel taint [ 41.035883] BUG: Bad rss-counter state mm:0000000077325492 type:MM_FILEPAGES val:33 [ 41.036866] BUG: Bad rss-counter state mm:0000000077325492 type:MM_ANONPAGES val:22 [ 41.505269] BUG: Bad rss-counter state mm:00000000acd7d3fa type:MM_FILEPAGES val:33 [ 41.506205] BUG: Bad rss-counter state mm:00000000acd7d3fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37937' (ECDSA) to the list of known hosts. 2023/06/20 11:55:24 fuzzer started 2023/06/20 11:55:24 dialing manager at localhost:36067 2023/06/20 11:55:24 checking machine... 2023/06/20 11:55:24 checking revisions... [ 42.129957] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:55:24 testing simple program... [ 42.185837] cgroup: Unknown subsys name 'net' [ 42.243822] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:55:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff818dae7a RDX=0000000000008dae RSI=0000000000008dae RDI=ffffffff8650d0a8 RBP=ffff888018d9f680 RSP=ffff888018d9f5b8 R8 =0000000000000000 R9 =ffff888018d9f668 R10=0000000000038001 R11=0000000000025fc6 R12=ffff888018d9f688 R13=ffff888018d9f670 R14=ffff888018d9f669 R15=ffff888018d9f628 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007fe1a2584700 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=00007ffdc2639498 CR3=0000000014778000 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=2033323a35353a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a35353a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88800ed4fdf0 RCX=ffffffff81859c15 RDX=ffff888010271b40 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff88800ed4fd80 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000008000 R13=ffff88800ed4fea8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c086b 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 00007f3f6c80f900 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=00007f3f6cdc70b0 CR3=000000000e5d6000 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=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