syzkaller login: [ 42.747248] BUG: Bad rss-counter state mm:00000000562364ce type:MM_FILEPAGES val:33 [ 42.748478] BUG: Bad rss-counter state mm:00000000562364ce type:MM_ANONPAGES val:22 [ 42.888324] ================================================================== [ 42.889129] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.889972] Read of size 8 at addr ffff88800fab8228 by task sshd/220 [ 42.890630] [ 42.890816] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.891546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.892487] Call Trace: [ 42.892759] [ 42.893001] dump_stack_lvl+0x91/0xf0 [ 42.893420] print_report+0xcc/0x620 [ 42.893847] ? __virt_addr_valid+0x102/0x340 [ 42.894333] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.894892] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.895437] kasan_report+0xbe/0xf0 [ 42.895841] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.896370] vma_interval_tree_remove+0xc75/0xec0 [ 42.896881] vma_prepare+0xc54/0x11a0 [ 42.897289] __split_vma+0x5af/0x950 [ 42.897698] ? __pfx___split_vma+0x10/0x10 [ 42.898154] ? find_held_lock+0x2c/0x110 [ 42.898603] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.899085] ? lock_is_held_type+0x9f/0x120 [ 42.899540] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.900061] ? mtree_range_walk+0x632/0x900 [ 42.900547] ? mas_walk+0x5c7/0x7c0 [ 42.900964] do_vmi_munmap+0x1f1/0x2b0 [ 42.901396] mmap_region+0x1f9/0x2660 [ 42.901799] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.902259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.902880] ? __pfx_lock_acquire+0x10/0x10 [ 42.903368] ? __pfx_mmap_region+0x10/0x10 [ 42.903838] ? security_mmap_addr+0x7d/0xa0 [ 42.904304] ? get_unmapped_area+0x1f5/0x3f0 [ 42.904775] do_mmap+0x854/0xf00 [ 42.905156] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.905587] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.906092] ksys_mmap_pgoff+0x3af/0x500 [ 42.906524] do_syscall_64+0x3f/0x90 [ 42.906935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.907510] RIP: 0033:0x7fba1c9d0d82 [ 42.907908] 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 [ 42.909727] RSP: 002b:00007fff527c2338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.910501] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba1c9d0d82 [ 42.911214] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba1be0a000 [ 42.911920] RBP: 00007fba1be0a000 R08: 0000000000000009 R09: 0000000000001000 [ 42.912630] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597bfe46ec0 [ 42.913341] R13: 00007fff527c2350 R14: 00007fff527c2380 R15: 00007fff527c26e0 [ 42.914073] [ 42.914315] [ 42.914494] Allocated by task 213: [ 42.914851] kasan_save_stack+0x22/0x50 [ 42.915277] kasan_set_track+0x25/0x30 [ 42.915688] __kasan_slab_alloc+0x59/0x70 [ 42.916131] kmem_cache_alloc+0x16b/0x370 [ 42.916567] vm_area_dup+0x20/0x160 [ 42.916941] __split_vma+0x170/0x950 [ 42.917329] split_vma+0xc6/0x110 [ 42.917698] mprotect_fixup+0x8d2/0xb30 [ 42.918124] do_mprotect_pkey+0x87e/0xd40 [ 42.918571] __x64_sys_mprotect+0x78/0xc0 [ 42.919008] do_syscall_64+0x3f/0x90 [ 42.919402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.919936] [ 42.920115] Freed by task 213: [ 42.920445] kasan_save_stack+0x22/0x50 [ 42.920864] kasan_set_track+0x25/0x30 [ 42.921274] kasan_save_free_info+0x2b/0x50 [ 42.921721] __kasan_slab_free+0x10a/0x190 [ 42.922183] kmem_cache_free+0x10d/0x4d0 [ 42.922606] rcu_core+0x8c8/0x2860 [ 42.922974] __do_softirq+0x1b7/0x7d4 [ 42.923372] [ 42.923550] Last potentially related work creation: [ 42.924048] kasan_save_stack+0x22/0x50 [ 42.924462] __kasan_record_aux_stack+0x8e/0xa0 [ 42.924943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.925487] remove_vma+0x139/0x170 [ 42.925873] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.926344] do_vmi_munmap+0x1f1/0x2b0 [ 42.926755] __vm_munmap+0x138/0x3a0 [ 42.927140] __x64_sys_munmap+0x59/0x80 [ 42.927554] do_syscall_64+0x3f/0x90 [ 42.927947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.928488] [ 42.928666] Second to last potentially related work creation: [ 42.929243] kasan_save_stack+0x22/0x50 [ 42.929669] __kasan_record_aux_stack+0x8e/0xa0 [ 42.930172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.930709] remove_vma+0x139/0x170 [ 42.931095] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.931568] do_vmi_munmap+0x1f1/0x2b0 [ 42.931977] mmap_region+0x1f9/0x2660 [ 42.932379] do_mmap+0x854/0xf00 [ 42.932736] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.933143] ksys_mmap_pgoff+0x3af/0x500 [ 42.933557] do_syscall_64+0x3f/0x90 [ 42.933966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.934501] [ 42.934685] The buggy address belongs to the object at ffff88800fab81d0 [ 42.934685] which belongs to the cache vm_area_struct of size 168 [ 42.935920] The buggy address is located 88 bytes inside of [ 42.935920] freed 168-byte region [ffff88800fab81d0, ffff88800fab8278) [ 42.937102] [ 42.937281] The buggy address belongs to the physical page: [ 42.937848] page:00000000d064e0a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfab8 [ 42.938746] memcg:ffff888016d82301 [ 42.939106] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.939649] page_type: 0xffffffff() [ 42.940027] raw: 0100000000000200 ffff88800879fc80 ffffea00005b61c0 0000000000000006 [ 42.940811] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d82301 [ 42.941576] page dumped because: kasan: bad access detected [ 42.942143] [ 42.942323] Memory state around the buggy address: [ 42.942806] ffff88800fab8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.943527] ffff88800fab8180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 42.944251] >ffff88800fab8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 42.944961] ^ [ 42.945419] ffff88800fab8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 42.946149] ffff88800fab8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 42.946858] ================================================================== [ 42.947927] Disabling lock debugging due to kernel taint [ 45.183473] BUG: Bad rss-counter state mm:000000004cc22439 type:MM_FILEPAGES val:33 [ 45.184546] BUG: Bad rss-counter state mm:000000004cc22439 type:MM_ANONPAGES val:22 [ 45.648472] BUG: Bad rss-counter state mm:00000000113397e5 type:MM_FILEPAGES val:33 [ 45.649477] BUG: Bad rss-counter state mm:00000000113397e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61581' (ECDSA) to the list of known hosts. 2023/06/19 22:02:31 fuzzer started 2023/06/19 22:02:32 dialing manager at localhost:44161 2023/06/19 22:02:32 checking machine... 2023/06/19 22:02:32 checking revisions... [ 46.357493] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:02:32 testing simple program... [ 46.406508] cgroup: Unknown subsys name 'net' [ 46.471102] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:02:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fffe8a463c8 CR3=0000000005482000 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=00007f087cca05100000557acb6c1790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffff88806cf39500 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806cf39504 RBP=1ffff1100d9e12f5 RSP=ffff88806cf097a0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888008d71b78 R13=1ffff1100d9e130d R14=0000000000000000 R15=ffff88806cf39500 RIP=ffffffff812e004a 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 00007f1738319900 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=00007fe08454c650 CR3=000000000c6da000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0016e9eb29b566e200000000000ae988 XMM05=3c0c97413119b2280000000000136078 XMM06=ab03bd33ad08cdfc0000000000134e18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000