syzkaller login: [ 31.033718] BUG: Bad rss-counter state mm:000000008ecccab1 type:MM_FILEPAGES val:33 [ 31.035499] BUG: Bad rss-counter state mm:000000008ecccab1 type:MM_ANONPAGES val:22 [ 31.192421] ================================================================== [ 31.193432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.194388] Read of size 8 at addr ffff888017c44058 by task sshd/219 [ 31.195351] [ 31.195577] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.196458] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.197502] Call Trace: [ 31.197824] [ 31.198110] dump_stack_lvl+0x91/0xf0 [ 31.198608] print_report+0xcc/0x620 [ 31.199091] ? __virt_addr_valid+0x102/0x340 [ 31.199662] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.200305] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.200931] kasan_report+0xbe/0xf0 [ 31.201413] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202048] vma_interval_tree_remove+0xc75/0xec0 [ 31.202654] vma_prepare+0xc54/0x11a0 [ 31.203143] __split_vma+0x5af/0x950 [ 31.203597] ? __pfx___split_vma+0x10/0x10 [ 31.204166] ? find_held_lock+0x2c/0x110 [ 31.204710] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.205275] ? lock_is_held_type+0x9f/0x120 [ 31.205787] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.206394] ? mtree_range_walk+0x632/0x900 [ 31.206974] ? mas_walk+0x5c7/0x7c0 [ 31.207471] do_vmi_munmap+0x1f1/0x2b0 [ 31.207985] mmap_region+0x1f9/0x2660 [ 31.208501] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.209041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.209776] ? __pfx_lock_acquire+0x10/0x10 [ 31.210334] ? __pfx_mmap_region+0x10/0x10 [ 31.210888] ? security_mmap_addr+0x7d/0xa0 [ 31.211450] ? get_unmapped_area+0x1f5/0x3f0 [ 31.212051] do_mmap+0x854/0xf00 [ 31.212510] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.213027] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.213610] ksys_mmap_pgoff+0x3af/0x500 [ 31.214131] do_syscall_64+0x3f/0x90 [ 31.214628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.215296] RIP: 0033:0x7f1f9b9fdd82 [ 31.215774] 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 [ 31.218010] RSP: 002b:00007ffeb2611f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.218971] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f9b9fdd82 [ 31.219853] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f9ae37000 [ 31.220742] RBP: 00007f1f9ae37000 R08: 0000000000000009 R09: 0000000000001000 [ 31.221621] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555952edff70 [ 31.222500] R13: 00007ffeb2611f20 R14: 00007ffeb2611f50 R15: 00007ffeb26122b0 [ 31.223394] [ 31.223697] [ 31.223917] Allocated by task 212: [ 31.224387] kasan_save_stack+0x22/0x50 [ 31.224914] kasan_set_track+0x25/0x30 [ 31.225432] __kasan_slab_alloc+0x59/0x70 [ 31.225982] kmem_cache_alloc+0x16b/0x370 [ 31.226491] vm_area_dup+0x20/0x160 [ 31.226922] __split_vma+0x170/0x950 [ 31.227369] split_vma+0xc6/0x110 [ 31.227789] mprotect_fixup+0x8d2/0xb30 [ 31.228272] do_mprotect_pkey+0x87e/0xd40 [ 31.228788] __x64_sys_mprotect+0x78/0xc0 [ 31.229318] do_syscall_64+0x3f/0x90 [ 31.229808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.230478] [ 31.230704] Freed by task 19: [ 31.231104] kasan_save_stack+0x22/0x50 [ 31.231618] kasan_set_track+0x25/0x30 [ 31.232128] kasan_save_free_info+0x2b/0x50 [ 31.232660] __kasan_slab_free+0x10a/0x190 [ 31.233216] kmem_cache_free+0x10d/0x4d0 [ 31.233717] rcu_core+0x8c8/0x2860 [ 31.234145] __do_softirq+0x1b7/0x7d4 [ 31.234597] [ 31.234806] Last potentially related work creation: [ 31.235371] kasan_save_stack+0x22/0x50 [ 31.235885] __kasan_record_aux_stack+0x8e/0xa0 [ 31.236585] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.237232] remove_vma+0x139/0x170 [ 31.237716] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.238282] do_vmi_munmap+0x1f1/0x2b0 [ 31.238809] __vm_munmap+0x138/0x3a0 [ 31.239281] __x64_sys_munmap+0x59/0x80 [ 31.239781] do_syscall_64+0x3f/0x90 [ 31.240274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240917] [ 31.241133] The buggy address belongs to the object at ffff888017c44000 [ 31.241133] which belongs to the cache vm_area_struct of size 168 [ 31.242607] The buggy address is located 88 bytes inside of [ 31.242607] freed 168-byte region [ffff888017c44000, ffff888017c440a8) [ 31.243934] [ 31.244147] The buggy address belongs to the physical page: [ 31.244772] page:0000000061aecd96 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c44 [ 31.245808] memcg:ffff8880168c0a01 [ 31.246209] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.246822] page_type: 0xffffffff() [ 31.247301] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.248264] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168c0a01 [ 31.249143] page dumped because: kasan: bad access detected [ 31.249773] [ 31.249977] Memory state around the buggy address: [ 31.250539] ffff888017c43f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.251419] ffff888017c43f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.252300] >ffff888017c44000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.253102] ^ [ 31.253785] ffff888017c44080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.254614] ffff888017c44100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.255468] ================================================================== [ 31.256407] Disabling lock debugging due to kernel taint [ 33.317670] BUG: Bad rss-counter state mm:000000009601e894 type:MM_FILEPAGES val:33 [ 33.318719] BUG: Bad rss-counter state mm:000000009601e894 type:MM_ANONPAGES val:22 [ 33.885893] BUG: Bad rss-counter state mm:0000000061b0bb93 type:MM_FILEPAGES val:33 [ 33.887081] BUG: Bad rss-counter state mm:0000000061b0bb93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36714' (ECDSA) to the list of known hosts. 2023/06/20 20:27:35 fuzzer started 2023/06/20 20:27:35 dialing manager at localhost:36067 2023/06/20 20:27:35 checking machine... 2023/06/20 20:27:35 checking revisions... [ 34.567844] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:27:35 testing simple program... [ 34.621461] cgroup: Unknown subsys name 'net' [ 34.659291] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:27:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f1a06524fef RSP=ffff888017f4f578 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f1a06524000 R11=00000000000b6a61 R12=ffff888017f4f690 R13=0000000000000000 R14=ffff888018f7b680 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f1a056e1700 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=00007fb0f3dd3650 CR3=000000000976e000 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=2034333a37323a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a37323a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=00000000000951d8 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810711 RBP=ffff88800844f780 RSP=ffff88806cf09df0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=0000000000000001 R14=ffffffff813782f8 R15=ffff8880165de410 RIP=ffffffff84511935 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 00007f7270f78900 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=00007f727039da60 CR3=000000000c5c4000 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=16618971c381128e00000000000ae988 XMM05=22f72d7d5d323ba80000000000132730 XMM06=806171799158d9670000000000131520 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000