syzkaller login: [ 35.582305] BUG: Bad rss-counter state mm:00000000f6e243c2 type:MM_FILEPAGES val:33 [ 35.583540] BUG: Bad rss-counter state mm:00000000f6e243c2 type:MM_ANONPAGES val:22 [ 35.620272] ================================================================== [ 35.621372] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.622492] Read of size 8 at addr ffff888013c51140 by task sshd/219 [ 35.623345] [ 35.623650] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.624569] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.625638] Call Trace: [ 35.625973] [ 35.626297] dump_stack_lvl+0x91/0xf0 [ 35.626853] print_report+0xcc/0x620 [ 35.627402] ? __virt_addr_valid+0x102/0x340 [ 35.628034] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.628731] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.629345] kasan_report+0xbe/0xf0 [ 35.629874] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.630567] vma_interval_tree_remove+0xc75/0xec0 [ 35.631235] vma_prepare+0xc54/0x11a0 [ 35.631728] __split_vma+0x5af/0x950 [ 35.632264] ? __pfx___split_vma+0x10/0x10 [ 35.632849] ? find_held_lock+0x2c/0x110 [ 35.633440] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.634093] ? lock_is_held_type+0x9f/0x120 [ 35.634731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.635337] ? mtree_range_walk+0x632/0x900 [ 35.636011] ? mas_walk+0x5c7/0x7c0 [ 35.636572] do_vmi_munmap+0x1f1/0x2b0 [ 35.637089] mmap_region+0x1f9/0x2660 [ 35.637563] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.638068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.638786] ? __pfx_lock_acquire+0x10/0x10 [ 35.639317] ? __pfx_mmap_region+0x10/0x10 [ 35.639845] ? security_mmap_addr+0x7d/0xa0 [ 35.640374] ? get_unmapped_area+0x1f5/0x3f0 [ 35.640918] do_mmap+0x854/0xf00 [ 35.641354] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.641840] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.642404] ksys_mmap_pgoff+0x3af/0x500 [ 35.642907] do_syscall_64+0x3f/0x90 [ 35.643385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.644024] RIP: 0033:0x7fbd30a94d82 [ 35.644479] 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 [ 35.646611] RSP: 002b:00007fff630418f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.647503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd30a94d82 [ 35.648337] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd2fece000 [ 35.649174] RBP: 00007fbd2fece000 R08: 0000000000000009 R09: 0000000000001000 [ 35.650007] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556221c0ef60 [ 35.650858] R13: 00007fff63041910 R14: 00007fff63041940 R15: 00007fff63041ca0 [ 35.651715] [ 35.652005] [ 35.652220] Allocated by task 212: [ 35.652646] kasan_save_stack+0x22/0x50 [ 35.653142] kasan_set_track+0x25/0x30 [ 35.653635] __kasan_slab_alloc+0x59/0x70 [ 35.654149] kmem_cache_alloc+0x16b/0x370 [ 35.654682] vm_area_dup+0x20/0x160 [ 35.655127] __split_vma+0x170/0x950 [ 35.655588] split_vma+0xc6/0x110 [ 35.656025] mprotect_fixup+0x8d2/0xb30 [ 35.656520] do_mprotect_pkey+0x87e/0xd40 [ 35.657044] __x64_sys_mprotect+0x78/0xc0 [ 35.657566] do_syscall_64+0x3f/0x90 [ 35.658032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.658682] [ 35.658898] Freed by task 212: [ 35.659286] kasan_save_stack+0x22/0x50 [ 35.659790] kasan_set_track+0x25/0x30 [ 35.660276] kasan_save_free_info+0x2b/0x50 [ 35.660807] __kasan_slab_free+0x10a/0x190 [ 35.661419] kmem_cache_free+0x10d/0x4d0 [ 35.661921] rcu_core+0x8c8/0x2860 [ 35.662368] __do_softirq+0x1b7/0x7d4 [ 35.662866] [ 35.663079] Last potentially related work creation: [ 35.663686] kasan_save_stack+0x22/0x50 [ 35.664210] __kasan_record_aux_stack+0x8e/0xa0 [ 35.664817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.665495] remove_vma+0x139/0x170 [ 35.665976] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.666571] do_vmi_munmap+0x1f1/0x2b0 [ 35.667082] __vm_munmap+0x138/0x3a0 [ 35.667572] __x64_sys_munmap+0x59/0x80 [ 35.668097] do_syscall_64+0x3f/0x90 [ 35.668595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.669270] [ 35.669491] The buggy address belongs to the object at ffff888013c510e8 [ 35.669491] which belongs to the cache vm_area_struct of size 168 [ 35.671044] The buggy address is located 88 bytes inside of [ 35.671044] freed 168-byte region [ffff888013c510e8, ffff888013c51190) [ 35.672524] [ 35.672751] The buggy address belongs to the physical page: [ 35.673443] page:00000000b142bce1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13c51 [ 35.674600] memcg:ffff8880098f0d01 [ 35.675044] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.675714] page_type: 0xffffffff() [ 35.676183] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 35.677138] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098f0d01 [ 35.678087] page dumped because: kasan: bad access detected [ 35.678784] [ 35.679008] Memory state around the buggy address: [ 35.679621] ffff888013c51000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.680511] ffff888013c51080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.681406] >ffff888013c51100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.682302] ^ [ 35.682980] ffff888013c51180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 35.683881] ffff888013c51200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 35.684778] ================================================================== [ 35.685831] Disabling lock debugging due to kernel taint [ 38.125578] BUG: Bad rss-counter state mm:0000000067d256ae type:MM_FILEPAGES val:33 [ 38.126598] BUG: Bad rss-counter state mm:0000000067d256ae type:MM_ANONPAGES val:22 [ 38.625574] BUG: Bad rss-counter state mm:00000000742eef97 type:MM_FILEPAGES val:33 [ 38.626670] BUG: Bad rss-counter state mm:00000000742eef97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56225' (ECDSA) to the list of known hosts. 2023/06/21 07:10:11 fuzzer started 2023/06/21 07:10:11 dialing manager at localhost:36067 2023/06/21 07:10:11 checking machine... 2023/06/21 07:10:11 checking revisions... [ 39.340233] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:10:11 testing simple program... [ 39.395038] cgroup: Unknown subsys name 'net' [ 39.440907] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:10:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffffffff85407f40 RDI=ffff88806ce09aa8 RBP=ffffffff85407f40 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000008 R13=ffffffff85400000 R14=ffffffff85407f40 R15=ffff88806ce09a98 RIP=ffffffff8113046e 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=00007ffd6fc5f558 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007feefe8b95100000564abd872790 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 info registers vcpu 1 RAX=ffff88800cb57000 RBX=ffff88800e1f88b8 RCX=1ffff11002c95744 RDX=dffffc0000000000 RSI=ffff88800cb52800 RDI=ffff88800e1f88e8 RBP=ffff8880164ab9f0 RSP=ffff88801686fc28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800cb52000 R13=0000000000000000 R14=ffff88800c5492a8 R15=ffff88800c549260 RIP=ffffffff81847688 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 00007f15dcb70900 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=00007f15dd1280b0 CR3=000000000efce000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000