syzkaller login: [ 30.688921] BUG: Bad rss-counter state mm:000000004248d024 type:MM_FILEPAGES val:33 [ 30.690251] BUG: Bad rss-counter state mm:000000004248d024 type:MM_ANONPAGES val:22 [ 30.838608] ================================================================== [ 30.839516] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.840482] Read of size 8 at addr ffff88800da8f798 by task sshd/220 [ 30.841289] [ 30.841555] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.842870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.844204] Call Trace: [ 30.844631] [ 30.845010] dump_stack_lvl+0x91/0xf0 [ 30.845691] print_report+0xcc/0x620 [ 30.846325] ? __virt_addr_valid+0x102/0x340 [ 30.847066] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847910] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848741] kasan_report+0xbe/0xf0 [ 30.849396] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.850224] vma_interval_tree_remove+0xc75/0xec0 [ 30.851040] vma_prepare+0xc54/0x11a0 [ 30.851688] __split_vma+0x5af/0x950 [ 30.852322] ? __pfx___split_vma+0x10/0x10 [ 30.853065] ? find_held_lock+0x2c/0x110 [ 30.853783] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.854542] ? lock_is_held_type+0x9f/0x120 [ 30.855274] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.856090] ? mtree_range_walk+0x632/0x900 [ 30.856835] ? mas_walk+0x5c7/0x7c0 [ 30.857498] do_vmi_munmap+0x1f1/0x2b0 [ 30.858162] mmap_region+0x1f9/0x2660 [ 30.858814] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.859499] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.860459] ? __pfx_lock_acquire+0x10/0x10 [ 30.861184] ? __pfx_mmap_region+0x10/0x10 [ 30.861901] ? security_mmap_addr+0x7d/0xa0 [ 30.862611] ? get_unmapped_area+0x1f5/0x3f0 [ 30.863349] do_mmap+0x854/0xf00 [ 30.863953] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.864618] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.865399] ksys_mmap_pgoff+0x3af/0x500 [ 30.866079] do_syscall_64+0x3f/0x90 [ 30.866718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867592] RIP: 0033:0x7f732c0d3d82 [ 30.868206] 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 [ 30.870653] RSP: 002b:00007fff5df49028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.871597] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f732c0d3d82 [ 30.872473] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f732b50d000 [ 30.873365] RBP: 00007f732b50d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.874231] R10: 0000000000000812 R11: 0000000000000206 R12: 000056449dda6ec0 [ 30.875114] R13: 00007fff5df49040 R14: 00007fff5df49070 R15: 00007fff5df493d0 [ 30.876006] [ 30.876302] [ 30.876517] Allocated by task 213: [ 30.876977] kasan_save_stack+0x22/0x50 [ 30.877499] kasan_set_track+0x25/0x30 [ 30.878009] __kasan_slab_alloc+0x59/0x70 [ 30.878531] kmem_cache_alloc+0x16b/0x370 [ 30.879079] vm_area_dup+0x20/0x160 [ 30.879531] __split_vma+0x170/0x950 [ 30.880015] split_vma+0xc6/0x110 [ 30.880432] mprotect_fixup+0x8d2/0xb30 [ 30.880926] do_mprotect_pkey+0x87e/0xd40 [ 30.881434] __x64_sys_mprotect+0x78/0xc0 [ 30.881948] do_syscall_64+0x3f/0x90 [ 30.882399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.883248] [ 30.883456] Freed by task 213: [ 30.883863] kasan_save_stack+0x22/0x50 [ 30.884340] kasan_set_track+0x25/0x30 [ 30.884816] kasan_save_free_info+0x2b/0x50 [ 30.885333] __kasan_slab_free+0x10a/0x190 [ 30.885846] kmem_cache_free+0x10d/0x4d0 [ 30.886326] rcu_core+0x8c8/0x2860 [ 30.886775] __do_softirq+0x1b7/0x7d4 [ 30.887230] [ 30.887436] Last potentially related work creation: [ 30.888034] kasan_save_stack+0x22/0x50 [ 30.888537] __kasan_record_aux_stack+0x8e/0xa0 [ 30.889143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.889808] remove_vma+0x139/0x170 [ 30.890260] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.890838] do_vmi_munmap+0x1f1/0x2b0 [ 30.891325] __vm_munmap+0x138/0x3a0 [ 30.891820] __x64_sys_munmap+0x59/0x80 [ 30.892320] do_syscall_64+0x3f/0x90 [ 30.892816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893478] [ 30.893714] The buggy address belongs to the object at ffff88800da8f740 [ 30.893714] which belongs to the cache vm_area_struct of size 168 [ 30.895196] The buggy address is located 88 bytes inside of [ 30.895196] freed 168-byte region [ffff88800da8f740, ffff88800da8f7e8) [ 30.896672] [ 30.896890] The buggy address belongs to the physical page: [ 30.897579] page:00000000f3ab385f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda8f [ 30.898687] memcg:ffff88800db40f01 [ 30.899118] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.899793] page_type: 0xffffffff() [ 30.900237] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.901195] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db40f01 [ 30.902118] page dumped because: kasan: bad access detected [ 30.902801] [ 30.903016] Memory state around the buggy address: [ 30.903632] ffff88800da8f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.904494] ffff88800da8f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.905392] >ffff88800da8f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.906277] ^ [ 30.906791] ffff88800da8f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.907687] ffff88800da8f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.908550] ================================================================== [ 30.909491] Disabling lock debugging due to kernel taint [ 32.923593] BUG: Bad rss-counter state mm:00000000d0ad7a80 type:MM_FILEPAGES val:33 [ 32.925312] BUG: Bad rss-counter state mm:00000000d0ad7a80 type:MM_ANONPAGES val:22 [ 33.378814] BUG: Bad rss-counter state mm:00000000265ba4c5 type:MM_FILEPAGES val:33 [ 33.379807] BUG: Bad rss-counter state mm:00000000265ba4c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19174' (ECDSA) to the list of known hosts. 2023/06/20 17:51:56 fuzzer started 2023/06/20 17:51:57 dialing manager at localhost:36067 2023/06/20 17:51:57 checking machine... 2023/06/20 17:51:57 checking revisions... [ 34.088612] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:51:57 testing simple program... [ 34.140763] cgroup: Unknown subsys name 'net' [ 34.180598] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:51:56 Registers: info registers vcpu 0 RAX=00000000000b5305 RBX=0000000000000002 RCX=ffffffff8451105d RDX=00000000000b5316 RSI=0000000000035110 RDI=000000000021f90f RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff8113083b 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 00007f3e97ba7900 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=00007f3e9815c650 CR3=000000000f234000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffe737537a8 CR3=0000000005482000 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=00007f82f3bd5510000055e9b9cd8790 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