syzkaller login: [ 31.167829] BUG: Bad rss-counter state mm:00000000da2583c5 type:MM_FILEPAGES val:33 [ 31.169217] BUG: Bad rss-counter state mm:00000000da2583c5 type:MM_ANONPAGES val:22 [ 31.328771] ================================================================== [ 31.329691] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.330642] Read of size 8 at addr ffff88800dc336b0 by task sshd/221 [ 31.331420] [ 31.331642] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.332662] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.333649] Call Trace: [ 31.333981] [ 31.334274] dump_stack_lvl+0x91/0xf0 [ 31.334792] print_report+0xcc/0x620 [ 31.335278] ? __virt_addr_valid+0x102/0x340 [ 31.335842] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336466] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.337090] kasan_report+0xbe/0xf0 [ 31.337568] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.338189] vma_interval_tree_remove+0xc75/0xec0 [ 31.338795] vma_prepare+0xc54/0x11a0 [ 31.339281] __split_vma+0x5af/0x950 [ 31.339773] ? __pfx___split_vma+0x10/0x10 [ 31.340312] ? find_held_lock+0x2c/0x110 [ 31.340831] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.341400] ? lock_is_held_type+0x9f/0x120 [ 31.341947] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.342550] ? mtree_range_walk+0x632/0x900 [ 31.343102] ? mas_walk+0x5c7/0x7c0 [ 31.343603] do_vmi_munmap+0x1f1/0x2b0 [ 31.344094] mmap_region+0x1f9/0x2660 [ 31.344576] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.345085] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.345802] ? __pfx_lock_acquire+0x10/0x10 [ 31.346339] ? __pfx_mmap_region+0x10/0x10 [ 31.346877] ? security_mmap_addr+0x7d/0xa0 [ 31.347413] ? get_unmapped_area+0x1f5/0x3f0 [ 31.347968] do_mmap+0x854/0xf00 [ 31.348415] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.348914] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.349477] ksys_mmap_pgoff+0x3af/0x500 [ 31.349988] do_syscall_64+0x3f/0x90 [ 31.350474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.351117] RIP: 0033:0x7ff5b49a2d82 [ 31.351591] 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 [ 31.353733] RSP: 002b:00007ffe8a85dea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.354641] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5b49a2d82 [ 31.355495] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff5b3ddc000 [ 31.356348] RBP: 00007ff5b3ddc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.357193] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559557baeec0 [ 31.358035] R13: 00007ffe8a85dec0 R14: 00007ffe8a85def0 R15: 00007ffe8a85e250 [ 31.358906] [ 31.359201] [ 31.359428] Allocated by task 213: [ 31.359854] kasan_save_stack+0x22/0x50 [ 31.360363] kasan_set_track+0x25/0x30 [ 31.360859] __kasan_slab_alloc+0x59/0x70 [ 31.361391] kmem_cache_alloc+0x16b/0x370 [ 31.361909] vm_area_dup+0x20/0x160 [ 31.362363] __split_vma+0x170/0x950 [ 31.362828] split_vma+0xc6/0x110 [ 31.363290] mprotect_fixup+0x8d2/0xb30 [ 31.363808] do_mprotect_pkey+0x87e/0xd40 [ 31.364335] __x64_sys_mprotect+0x78/0xc0 [ 31.364867] do_syscall_64+0x3f/0x90 [ 31.365350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.366008] [ 31.366224] Freed by task 213: [ 31.366616] kasan_save_stack+0x22/0x50 [ 31.367119] kasan_set_track+0x25/0x30 [ 31.367641] kasan_save_free_info+0x2b/0x50 [ 31.368183] __kasan_slab_free+0x10a/0x190 [ 31.368732] kmem_cache_free+0x10d/0x4d0 [ 31.369252] rcu_core+0x8c8/0x2860 [ 31.369703] __do_softirq+0x1b7/0x7d4 [ 31.370184] [ 31.370408] Last potentially related work creation: [ 31.370995] kasan_save_stack+0x22/0x50 [ 31.371548] __kasan_record_aux_stack+0x8e/0xa0 [ 31.372131] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.372776] remove_vma+0x139/0x170 [ 31.373229] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.373840] do_vmi_munmap+0x1f1/0x2b0 [ 31.374326] __vm_munmap+0x138/0x3a0 [ 31.374793] __x64_sys_munmap+0x59/0x80 [ 31.375286] do_syscall_64+0x3f/0x90 [ 31.375777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.376421] [ 31.376634] The buggy address belongs to the object at ffff88800dc33658 [ 31.376634] which belongs to the cache vm_area_struct of size 168 [ 31.378100] The buggy address is located 88 bytes inside of [ 31.378100] freed 168-byte region [ffff88800dc33658, ffff88800dc33700) [ 31.379513] [ 31.379728] The buggy address belongs to the physical page: [ 31.380388] page:00000000085b03c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc33 [ 31.381487] memcg:ffff8880165c3901 [ 31.381914] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.382565] page_type: 0xffffffff() [ 31.383028] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.383977] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165c3901 [ 31.384901] page dumped because: kasan: bad access detected [ 31.385579] [ 31.385797] Memory state around the buggy address: [ 31.386374] ffff88800dc33580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.387242] ffff88800dc33600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.388119] >ffff88800dc33680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.388982] ^ [ 31.389567] ffff88800dc33700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.390432] ffff88800dc33780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.391292] ================================================================== [ 31.392432] Disabling lock debugging due to kernel taint [ 34.110539] BUG: Bad rss-counter state mm:0000000080b7beee type:MM_FILEPAGES val:33 [ 34.111547] BUG: Bad rss-counter state mm:0000000080b7beee type:MM_ANONPAGES val:22 [ 34.662960] BUG: Bad rss-counter state mm:00000000ee964fbd type:MM_FILEPAGES val:33 [ 34.664128] BUG: Bad rss-counter state mm:00000000ee964fbd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11744' (ECDSA) to the list of known hosts. 2023/06/21 03:22:21 fuzzer started 2023/06/21 03:22:21 dialing manager at localhost:36067 2023/06/21 03:22:21 checking machine... 2023/06/21 03:22:21 checking revisions... [ 35.324704] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:22:22 testing simple program... [ 35.388424] cgroup: Unknown subsys name 'net' [ 35.436733] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:22:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110019caec4 RSI=ffffffff81b4bb01 RDI=ffff88800ce57690 RBP=ffff88800ce57660 RSP=ffff88800ce575b8 R8 =0000000000000001 R9 =ffff88800ce57608 R10=0000000000038001 R11=000000000002b98d R12=ffff88800ce57690 R13=0000000000000000 R14=ffff88800e3ed1c0 R15=0000000000000000 RIP=ffffffff813ad47f RFL=00000282 [--S----] 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 00007fbc13fff700 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=00007ffee8a572b8 CR3=0000000015ea8000 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=2031323a32323a3330203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a32323a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffb3a0125 RBX=ffffffff85d92c20 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c20 RSP=ffff88801476f3c0 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=ffffffff85d92c20 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f71d43af900 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=00007f71d37c3080 CR3=000000000d768000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=885843a028505a1300000000000ae988 XMM05=cec68b0b9c7c8af30000000000133420 XMM06=e4cb8bb95a7664b600000000001322d8 XMM07=fb795ef6d65770560000000000122470 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000