syzkaller login: [ 30.708833] BUG: Bad rss-counter state mm:00000000febaab5f type:MM_FILEPAGES val:33 [ 30.709885] BUG: Bad rss-counter state mm:00000000febaab5f type:MM_ANONPAGES val:22 [ 30.871798] ================================================================== [ 30.872756] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.873726] Read of size 8 at addr ffff88800e0ad4e0 by task sshd/221 [ 30.874674] [ 30.874896] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.875812] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.876805] Call Trace: [ 30.877126] [ 30.877414] dump_stack_lvl+0x91/0xf0 [ 30.877933] print_report+0xcc/0x620 [ 30.878523] ? __virt_addr_valid+0x102/0x340 [ 30.879087] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.879767] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.880439] kasan_report+0xbe/0xf0 [ 30.880932] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.881600] vma_interval_tree_remove+0xc75/0xec0 [ 30.882244] vma_prepare+0xc54/0x11a0 [ 30.882752] __split_vma+0x5af/0x950 [ 30.883271] ? __pfx___split_vma+0x10/0x10 [ 30.883839] ? find_held_lock+0x2c/0x110 [ 30.884378] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.884962] ? lock_is_held_type+0x9f/0x120 [ 30.885524] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.886151] ? mtree_range_walk+0x632/0x900 [ 30.886720] ? mas_walk+0x5c7/0x7c0 [ 30.887212] do_vmi_munmap+0x1f1/0x2b0 [ 30.887744] mmap_region+0x1f9/0x2660 [ 30.888244] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.888774] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.889514] ? __pfx_lock_acquire+0x10/0x10 [ 30.890064] ? __pfx_mmap_region+0x10/0x10 [ 30.890611] ? security_mmap_addr+0x7d/0xa0 [ 30.891164] ? get_unmapped_area+0x1f5/0x3f0 [ 30.891745] do_mmap+0x854/0xf00 [ 30.892197] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.892707] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.893290] ksys_mmap_pgoff+0x3af/0x500 [ 30.893818] do_syscall_64+0x3f/0x90 [ 30.894316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894986] RIP: 0033:0x7f28d30edd82 [ 30.895470] 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 [ 30.897708] RSP: 002b:00007ffd22846d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.898693] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28d30edd82 [ 30.899600] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28d2527000 [ 30.900513] RBP: 00007f28d2527000 R08: 0000000000000009 R09: 0000000000001000 [ 30.901416] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621c238bec0 [ 30.902344] R13: 00007ffd22846d60 R14: 00007ffd22846d90 R15: 00007ffd228470f0 [ 30.903258] [ 30.903569] [ 30.903819] Allocated by task 214: [ 30.904284] kasan_save_stack+0x22/0x50 [ 30.904815] kasan_set_track+0x25/0x30 [ 30.905346] __kasan_slab_alloc+0x59/0x70 [ 30.905894] kmem_cache_alloc+0x16b/0x370 [ 30.906451] vm_area_dup+0x20/0x160 [ 30.906918] __split_vma+0x170/0x950 [ 30.907398] split_vma+0xc6/0x110 [ 30.907880] mprotect_fixup+0x8d2/0xb30 [ 30.908400] do_mprotect_pkey+0x87e/0xd40 [ 30.908947] __x64_sys_mprotect+0x78/0xc0 [ 30.909485] do_syscall_64+0x3f/0x90 [ 30.909977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.910657] [ 30.910878] Freed by task 204: [ 30.911283] kasan_save_stack+0x22/0x50 [ 30.911819] kasan_set_track+0x25/0x30 [ 30.912326] kasan_save_free_info+0x2b/0x50 [ 30.912882] __kasan_slab_free+0x10a/0x190 [ 30.913431] kmem_cache_free+0x10d/0x4d0 [ 30.913969] rcu_core+0x8c8/0x2860 [ 30.914429] __do_softirq+0x1b7/0x7d4 [ 30.914919] [ 30.915142] Last potentially related work creation: [ 30.915834] kasan_save_stack+0x22/0x50 [ 30.916358] __kasan_record_aux_stack+0x8e/0xa0 [ 30.916950] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.917624] remove_vma+0x139/0x170 [ 30.918094] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.918670] do_vmi_munmap+0x1f1/0x2b0 [ 30.919171] __vm_munmap+0x138/0x3a0 [ 30.919662] __x64_sys_munmap+0x59/0x80 [ 30.920176] do_syscall_64+0x3f/0x90 [ 30.920672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.921335] [ 30.921562] The buggy address belongs to the object at ffff88800e0ad488 [ 30.921562] which belongs to the cache vm_area_struct of size 168 [ 30.923081] The buggy address is located 88 bytes inside of [ 30.923081] freed 168-byte region [ffff88800e0ad488, ffff88800e0ad530) [ 30.924559] [ 30.924781] The buggy address belongs to the physical page: [ 30.925466] page:0000000007f23ed8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0ad [ 30.926591] memcg:ffff88800ea86e01 [ 30.927031] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.927715] page_type: 0xffffffff() [ 30.928180] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.929137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea86e01 [ 30.930083] page dumped because: kasan: bad access detected [ 30.930768] [ 30.930992] Memory state around the buggy address: [ 30.931594] ffff88800e0ad380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.932509] ffff88800e0ad400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.933399] >ffff88800e0ad480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.934279] ^ [ 30.935218] ffff88800e0ad500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.936351] ffff88800e0ad580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.937452] ================================================================== [ 30.938759] Disabling lock debugging due to kernel taint [ 33.137180] BUG: Bad rss-counter state mm:000000003766f360 type:MM_FILEPAGES val:33 [ 33.138354] BUG: Bad rss-counter state mm:000000003766f360 type:MM_ANONPAGES val:22 [ 33.661250] BUG: Bad rss-counter state mm:00000000c087e18d type:MM_FILEPAGES val:33 [ 33.662409] BUG: Bad rss-counter state mm:00000000c087e18d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32787' (ECDSA) to the list of known hosts. 2023/06/21 00:44:54 fuzzer started 2023/06/21 00:44:55 dialing manager at localhost:36067 2023/06/21 00:44:55 checking machine... 2023/06/21 00:44:55 checking revisions... [ 34.316327] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:44:55 testing simple program... [ 34.371446] cgroup: Unknown subsys name 'net' [ 34.409344] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:44:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffff88806ce09b38 RDX=1ffff1100d9c135c RSI=1ffff1100d9c1355 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88806ce09a98 R11=0000000000000000 R12=ffffed100d9c1355 R13=ffff88806ce09ae0 R14=ffff88806ce09ae0 R15=ffff88806ce09a98 RIP=ffffffff81130653 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 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=00007fff36f412f8 CR3=000000000c63a000 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=2034353a34343a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a34343a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a57e9d RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf4e8 RBP=ffff888014307d28 RSP=ffff888014307c60 R8 =0000000000000006 R9 =0000000000000101 R10=0000000000000095 R11=0000000000000000 R12=0000000000000015 R13=ffff888014307d60 R14=0000000000000015 R15=ffffc9000068d528 RIP=ffffffff815a2a0f 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 00007f2066d3a900 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=00007f5fdbb57650 CR3=000000000b956000 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=83b7eff8adb2159c00000000000ae988 XMM05=1fdf2fc76f588a260000000000132440 XMM06=7aad5cadf9a530ad00000000001311e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000