syzkaller login: [ 31.736298] BUG: Bad rss-counter state mm:00000000e06f26ef type:MM_FILEPAGES val:33 [ 31.737502] BUG: Bad rss-counter state mm:00000000e06f26ef type:MM_ANONPAGES val:22 [ 31.888562] ================================================================== [ 31.889823] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.891153] Read of size 8 at addr ffff888015833880 by task sshd/220 [ 31.892226] [ 31.892461] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.893417] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.894495] Call Trace: [ 31.894853] <TASK> [ 31.895167] dump_stack_lvl+0x91/0xf0 [ 31.895708] print_report+0xcc/0x620 [ 31.896259] ? __virt_addr_valid+0x102/0x340 [ 31.896854] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.897533] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.898202] kasan_report+0xbe/0xf0 [ 31.898725] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.899439] vma_interval_tree_remove+0xc75/0xec0 [ 31.900168] vma_prepare+0xc54/0x11a0 [ 31.900712] __split_vma+0x5af/0x950 [ 31.901254] ? __pfx___split_vma+0x10/0x10 [ 31.901847] ? find_held_lock+0x2c/0x110 [ 31.902443] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.903055] ? lock_is_held_type+0x9f/0x120 [ 31.903606] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.904263] ? mtree_range_walk+0x632/0x900 [ 31.904831] ? mas_walk+0x5c7/0x7c0 [ 31.905340] do_vmi_munmap+0x1f1/0x2b0 [ 31.905857] mmap_region+0x1f9/0x2660 [ 31.906376] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.906966] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.907805] ? __pfx_lock_acquire+0x10/0x10 [ 31.908475] ? __pfx_mmap_region+0x10/0x10 [ 31.909110] ? security_mmap_addr+0x7d/0xa0 [ 31.909742] ? get_unmapped_area+0x1f5/0x3f0 [ 31.910393] do_mmap+0x854/0xf00 [ 31.910914] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.911503] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.912190] ksys_mmap_pgoff+0x3af/0x500 [ 31.912794] do_syscall_64+0x3f/0x90 [ 31.913376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.914155] RIP: 0033:0x7f553ae64d82 [ 31.914702] 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 [ 31.917286] RSP: 002b:00007fffcc10a0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.918360] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f553ae64d82 [ 31.919381] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f553a29e000 [ 31.920420] RBP: 00007f553a29e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.921453] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625ecbf1ec0 [ 31.922482] R13: 00007fffcc10a0d0 R14: 00007fffcc10a100 R15: 00007fffcc10a460 [ 31.923509] </TASK> [ 31.923853] [ 31.924136] Allocated by task 213: [ 31.924662] kasan_save_stack+0x22/0x50 [ 31.925270] kasan_set_track+0x25/0x30 [ 31.925851] __kasan_slab_alloc+0x59/0x70 [ 31.926466] kmem_cache_alloc+0x16b/0x370 [ 31.927085] vm_area_dup+0x20/0x160 [ 31.927624] __split_vma+0x170/0x950 [ 31.928209] split_vma+0xc6/0x110 [ 31.928726] mprotect_fixup+0x8d2/0xb30 [ 31.929329] do_mprotect_pkey+0x87e/0xd40 [ 31.929956] __x64_sys_mprotect+0x78/0xc0 [ 31.930586] do_syscall_64+0x3f/0x90 [ 31.931148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.931931] [ 31.932189] Freed by task 213: [ 31.932774] kasan_save_stack+0x22/0x50 [ 31.933376] kasan_set_track+0x25/0x30 [ 31.933963] kasan_save_free_info+0x2b/0x50 [ 31.934613] __kasan_slab_free+0x10a/0x190 [ 31.935247] kmem_cache_free+0x10d/0x4d0 [ 31.935854] rcu_core+0x8c8/0x2860 [ 31.936380] __do_softirq+0x1b7/0x7d4 [ 31.936930] [ 31.937179] Last potentially related work creation: [ 31.937848] kasan_save_stack+0x22/0x50 [ 31.938437] __kasan_record_aux_stack+0x8e/0xa0 [ 31.939095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.939824] remove_vma+0x139/0x170 [ 31.940350] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.940980] do_vmi_munmap+0x1f1/0x2b0 [ 31.941535] __vm_munmap+0x138/0x3a0 [ 31.942073] __x64_sys_munmap+0x59/0x80 [ 31.942636] do_syscall_64+0x3f/0x90 [ 31.943169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.943923] [ 31.944166] The buggy address belongs to the object at ffff888015833828 [ 31.944166] which belongs to the cache vm_area_struct of size 168 [ 31.945829] The buggy address is located 88 bytes inside of [ 31.945829] freed 168-byte region [ffff888015833828, ffff8880158338d0) [ 31.947419] [ 31.947667] The buggy address belongs to the physical page: [ 31.948413] page:00000000a39387cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15833 [ 31.949675] memcg:ffff888015834001 [ 31.950155] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.950893] page_type: 0xffffffff() [ 31.951398] raw: 0100000000000200 ffff88800879fc80 ffffea00003adbc0 000000000000000c [ 31.952457] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015834001 [ 31.953491] page dumped because: kasan: bad access detected [ 31.954249] [ 31.954489] Memory state around the buggy address: [ 31.955145] ffff888015833780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.956141] ffff888015833800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.957108] >ffff888015833880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.958057] ^ [ 31.958521] ffff888015833900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.959491] ffff888015833980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.960479] ================================================================== [ 31.961593] Disabling lock debugging due to kernel taint [ 33.826211] BUG: Bad rss-counter state mm:000000000f687558 type:MM_FILEPAGES val:33 [ 33.827114] BUG: Bad rss-counter state mm:000000000f687558 type:MM_ANONPAGES val:22 [ 34.323396] BUG: Bad rss-counter state mm:00000000c4a0e20a type:MM_FILEPAGES val:33 [ 34.324445] BUG: Bad rss-counter state mm:00000000c4a0e20a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36015' (ECDSA) to the list of known hosts. 2023/06/20 07:43:22 fuzzer started 2023/06/20 07:43:22 dialing manager at localhost:44161 2023/06/20 07:43:22 checking machine... 2023/06/20 07:43:22 checking revisions... [ 35.032695] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:43:23 testing simple program... [ 35.082202] cgroup: Unknown subsys name 'net' [ 35.119167] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:43:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff81935c5d RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88801635a068 RSP=ffff888015857af8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=ffff888010176000 R14=ffff888015857b98 R15=ffff88801635a068 RIP=ffffffff81935c65 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8b40c0d900 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=00007f8b4012d000 CR3=000000000d93c000 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=7e8a42789393c4b7000000000011f480 XMM01=eff9b2d0a8fce9cb000000000011f630 XMM02=2c67c8bc2e329bc3000000000011f758 XMM03=fb795ef6d65770560000000000123de8 XMM04=59efe7051772916b00000000000ae988 XMM05=604f8e067cbd0f560000000000133bd0 XMM06=4fda316b135da52b0000000000133858 XMM07=e042d86d42eb936e0000000000124068 XMM08=16ab6ca114f0e8ca000000000011f7b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801930ed38 RCX=ffffffff812e00e5 RDX=1ffff11001971854 RSI=0000000000000000 RDI=ffff88800cb8c2a0 RBP=ffff88800cb8c260 RSP=ffff88806cf09e08 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=0000000000000283 R13=ffffea000064c380 R14=ffffffff813782a8 R15=ffff88800ec1e700 RIP=ffffffff845135a1 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 00007f83f1cd5900 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=00007f83f1c8e008 CR3=000000000e92a000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000