syzkaller login: [ 41.494451] BUG: Bad rss-counter state mm:00000000e0480920 type:MM_FILEPAGES val:33 [ 41.495507] BUG: Bad rss-counter state mm:00000000e0480920 type:MM_ANONPAGES val:22 [ 41.653785] ================================================================== [ 41.654732] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.655726] Read of size 8 at addr ffff88800e712968 by task sshd/226 [ 41.656532] [ 41.656752] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.657740] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.658803] Call Trace: [ 41.659133] [ 41.659426] dump_stack_lvl+0x91/0xf0 [ 41.659953] print_report+0xcc/0x620 [ 41.660462] ? __virt_addr_valid+0x102/0x340 [ 41.661038] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.661677] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.662316] kasan_report+0xbe/0xf0 [ 41.662806] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.663452] vma_interval_tree_remove+0xc75/0xec0 [ 41.664092] vma_prepare+0xc54/0x11a0 [ 41.664598] __split_vma+0x5af/0x950 [ 41.665081] ? __pfx___split_vma+0x10/0x10 [ 41.665626] ? find_held_lock+0x2c/0x110 [ 41.666156] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.666739] ? lock_is_held_type+0x9f/0x120 [ 41.667300] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.667950] ? mtree_range_walk+0x632/0x900 [ 41.668522] ? mas_walk+0x5c7/0x7c0 [ 41.669008] do_vmi_munmap+0x1f1/0x2b0 [ 41.669517] mmap_region+0x1f9/0x2660 [ 41.670012] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.670541] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.671277] ? __pfx_lock_acquire+0x10/0x10 [ 41.671835] ? __pfx_mmap_region+0x10/0x10 [ 41.672380] ? security_mmap_addr+0x7d/0xa0 [ 41.672927] ? get_unmapped_area+0x1f5/0x3f0 [ 41.673498] do_mmap+0x854/0xf00 [ 41.673944] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.674446] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.675023] ksys_mmap_pgoff+0x3af/0x500 [ 41.675541] do_syscall_64+0x3f/0x90 [ 41.676048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.676710] RIP: 0033:0x7f9e267f8d82 [ 41.677181] 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 [ 41.679410] RSP: 002b:00007fff47979c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.680342] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e267f8d82 [ 41.681197] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e25c32000 [ 41.682040] RBP: 00007f9e25c32000 R08: 0000000000000009 R09: 0000000000001000 [ 41.682906] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f52740980 [ 41.683771] R13: 00007fff47979ca0 R14: 00007fff47979cd0 R15: 00007fff4797a030 [ 41.684625] [ 41.684924] [ 41.685139] Allocated by task 219: [ 41.685574] kasan_save_stack+0x22/0x50 [ 41.686083] kasan_set_track+0x25/0x30 [ 41.686582] __kasan_slab_alloc+0x59/0x70 [ 41.687115] kmem_cache_alloc+0x16b/0x370 [ 41.687631] vm_area_dup+0x20/0x160 [ 41.688094] __split_vma+0x170/0x950 [ 41.688565] split_vma+0xc6/0x110 [ 41.689003] mprotect_fixup+0x8d2/0xb30 [ 41.689501] do_mprotect_pkey+0x87e/0xd40 [ 41.690025] __x64_sys_mprotect+0x78/0xc0 [ 41.690556] do_syscall_64+0x3f/0x90 [ 41.691028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.691666] [ 41.691902] Freed by task 13: [ 41.692286] kasan_save_stack+0x22/0x50 [ 41.692795] kasan_set_track+0x25/0x30 [ 41.693305] kasan_save_free_info+0x2b/0x50 [ 41.693831] __kasan_slab_free+0x10a/0x190 [ 41.694358] kmem_cache_free+0x10d/0x4d0 [ 41.694867] rcu_core+0x8c8/0x2860 [ 41.695312] __do_softirq+0x1b7/0x7d4 [ 41.695793] [ 41.696007] Last potentially related work creation: [ 41.696584] kasan_save_stack+0x22/0x50 [ 41.697115] __kasan_record_aux_stack+0x8e/0xa0 [ 41.697701] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.698358] remove_vma+0x139/0x170 [ 41.698879] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.699456] do_vmi_munmap+0x1f1/0x2b0 [ 41.699980] __vm_munmap+0x138/0x3a0 [ 41.700461] __x64_sys_munmap+0x59/0x80 [ 41.700971] do_syscall_64+0x3f/0x90 [ 41.701460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.702126] [ 41.702343] The buggy address belongs to the object at ffff88800e712910 [ 41.702343] which belongs to the cache vm_area_struct of size 168 [ 41.703872] The buggy address is located 88 bytes inside of [ 41.703872] freed 168-byte region [ffff88800e712910, ffff88800e7129b8) [ 41.705337] [ 41.705557] The buggy address belongs to the physical page: [ 41.706231] page:0000000001107d8b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe712 [ 41.707353] memcg:ffff888015cd3001 [ 41.707808] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.708473] page_type: 0xffffffff() [ 41.708930] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.709873] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015cd3001 [ 41.710813] page dumped because: kasan: bad access detected [ 41.711503] [ 41.711733] Memory state around the buggy address: [ 41.712335] ffff88800e712800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 41.713230] ffff88800e712880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 41.714125] >ffff88800e712900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.715008] ^ [ 41.715833] ffff88800e712980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 41.716722] ffff88800e712a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.717610] ================================================================== [ 41.718644] Disabling lock debugging due to kernel taint [ 43.739167] BUG: Bad rss-counter state mm:000000002a311fff type:MM_FILEPAGES val:33 [ 43.740157] BUG: Bad rss-counter state mm:000000002a311fff type:MM_ANONPAGES val:22 [ 44.335623] BUG: Bad rss-counter state mm:0000000086835b1f type:MM_FILEPAGES val:33 [ 44.336607] BUG: Bad rss-counter state mm:0000000086835b1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16199' (ECDSA) to the list of known hosts. 2023/06/19 23:00:45 fuzzer started 2023/06/19 23:00:45 dialing manager at localhost:44161 2023/06/19 23:00:45 checking machine... 2023/06/19 23:00:45 checking revisions... [ 44.990259] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:00:45 testing simple program... [ 45.038868] cgroup: Unknown subsys name 'net' [ 45.077722] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:00:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d7f978 RCX=0000000000000001 RDX=1ffff110011aff30 RSI=ffff888008d7f948 RDI=ffff888008d7f988 RBP=ffff888008d78000 RSP=ffff888008d7f8b8 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000006097 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7f948 R15=ffff888008d7f978 RIP=ffffffff81131c91 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=00007f48b8b24650 CR3=000000000e7de000 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=2034343a30303a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a30303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002050f39 RSP=ffff8880102879a8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff81803a7c R14=0000000000000001 R15=0000000000000dc0 RIP=ffffffff8135b8e5 RFL=00000247 [---Z-PC] 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 00007f5b37657900 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=00007f5b36b77000 CR3=000000000c6ea000 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=61aa1a4ccbdce01800000000000ae988 XMM05=33f2898074e5e4e50000000000134de8 XMM06=13e856d8d71426c80000000000133868 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000