syzkaller login: [ 28.857533] BUG: Bad rss-counter state mm:0000000035a3cf84 type:MM_FILEPAGES val:33 [ 28.858847] BUG: Bad rss-counter state mm:0000000035a3cf84 type:MM_ANONPAGES val:22 [ 28.897357] ================================================================== [ 28.898727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.900225] Read of size 8 at addr ffff88800eaac3f8 by task sshd/219 [ 28.901306] [ 28.901585] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.902796] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.904054] Call Trace: [ 28.904410] [ 28.904791] dump_stack_lvl+0x91/0xf0 [ 28.905428] print_report+0xcc/0x620 [ 28.906011] ? __virt_addr_valid+0x102/0x340 [ 28.906634] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.907358] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.908141] kasan_report+0xbe/0xf0 [ 28.908693] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.909366] vma_interval_tree_remove+0xc75/0xec0 [ 28.910003] vma_prepare+0xc54/0x11a0 [ 28.910546] __split_vma+0x5af/0x950 [ 28.911038] ? __pfx___split_vma+0x10/0x10 [ 28.911583] ? find_held_lock+0x2c/0x110 [ 28.912119] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.912703] ? lock_is_held_type+0x9f/0x120 [ 28.913240] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.913850] ? mtree_range_walk+0x632/0x900 [ 28.914413] ? mas_walk+0x5c7/0x7c0 [ 28.914898] do_vmi_munmap+0x1f1/0x2b0 [ 28.915392] mmap_region+0x1f9/0x2660 [ 28.915878] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.916388] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.917100] ? __pfx_lock_acquire+0x10/0x10 [ 28.917638] ? __pfx_mmap_region+0x10/0x10 [ 28.918171] ? security_mmap_addr+0x7d/0xa0 [ 28.918714] ? get_unmapped_area+0x1f5/0x3f0 [ 28.919270] do_mmap+0x854/0xf00 [ 28.919715] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.920211] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.920777] ksys_mmap_pgoff+0x3af/0x500 [ 28.921282] do_syscall_64+0x3f/0x90 [ 28.921762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.922428] RIP: 0033:0x7f4b6b9a3d82 [ 28.922890] 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 [ 28.924997] RSP: 002b:00007ffe351c8728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.925901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b6b9a3d82 [ 28.926764] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b6addd000 [ 28.927603] RBP: 00007f4b6addd000 R08: 0000000000000009 R09: 0000000000001000 [ 28.928442] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e3d2eeec0 [ 28.929284] R13: 00007ffe351c8740 R14: 00007ffe351c8770 R15: 00007ffe351c8ad0 [ 28.930138] [ 28.930438] [ 28.930650] Allocated by task 211: [ 28.931082] kasan_save_stack+0x22/0x50 [ 28.931591] kasan_set_track+0x25/0x30 [ 28.932079] __kasan_slab_alloc+0x59/0x70 [ 28.932603] kmem_cache_alloc+0x16b/0x370 [ 28.933111] vm_area_dup+0x20/0x160 [ 28.933565] __split_vma+0x170/0x950 [ 28.934032] split_vma+0xc6/0x110 [ 28.934490] mprotect_fixup+0x8d2/0xb30 [ 28.934993] do_mprotect_pkey+0x87e/0xd40 [ 28.935515] __x64_sys_mprotect+0x78/0xc0 [ 28.936035] do_syscall_64+0x3f/0x90 [ 28.936508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.937152] [ 28.937371] Freed by task 211: [ 28.937767] kasan_save_stack+0x22/0x50 [ 28.938286] kasan_set_track+0x25/0x30 [ 28.938784] kasan_save_free_info+0x2b/0x50 [ 28.939315] __kasan_slab_free+0x10a/0x190 [ 28.939849] kmem_cache_free+0x10d/0x4d0 [ 28.940351] rcu_core+0x8c8/0x2860 [ 28.940798] __do_softirq+0x1b7/0x7d4 [ 28.941381] [ 28.941597] Last potentially related work creation: [ 28.942188] kasan_save_stack+0x22/0x50 [ 28.942729] __kasan_record_aux_stack+0x8e/0xa0 [ 28.943310] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.943954] remove_vma+0x139/0x170 [ 28.944409] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.944973] do_vmi_munmap+0x1f1/0x2b0 [ 28.945464] __vm_munmap+0x138/0x3a0 [ 28.945927] __x64_sys_munmap+0x59/0x80 [ 28.946427] do_syscall_64+0x3f/0x90 [ 28.946900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.947551] [ 28.947764] Second to last potentially related work creation: [ 28.948454] kasan_save_stack+0x22/0x50 [ 28.948962] __kasan_record_aux_stack+0x8e/0xa0 [ 28.949536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.950180] remove_vma+0x139/0x170 [ 28.950653] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.951217] do_vmi_munmap+0x1f1/0x2b0 [ 28.951711] mmap_region+0x1f9/0x2660 [ 28.952198] do_mmap+0x854/0xf00 [ 28.952641] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.953130] ksys_mmap_pgoff+0x3af/0x500 [ 28.953644] do_syscall_64+0x3f/0x90 [ 28.954120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.954772] [ 28.954992] The buggy address belongs to the object at ffff88800eaac3a0 [ 28.954992] which belongs to the cache vm_area_struct of size 168 [ 28.956449] The buggy address is located 88 bytes inside of [ 28.956449] freed 168-byte region [ffff88800eaac3a0, ffff88800eaac448) [ 28.957847] [ 28.958063] The buggy address belongs to the physical page: [ 28.958739] page:0000000052fe63be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaac [ 28.959816] memcg:ffff88800e599201 [ 28.960244] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.960941] page_type: 0xffffffff() [ 28.961391] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aaec0 dead000000000003 [ 28.962323] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e599201 [ 28.963227] page dumped because: kasan: bad access detected [ 28.963889] [ 28.964108] Memory state around the buggy address: [ 28.964693] ffff88800eaac280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 28.965551] ffff88800eaac300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 28.966420] >ffff88800eaac380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.967282] ^ [ 28.968127] ffff88800eaac400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.968979] ffff88800eaac480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.969825] ================================================================== [ 28.970847] Disabling lock debugging due to kernel taint [ 31.240612] BUG: Bad rss-counter state mm:0000000010d667a5 type:MM_FILEPAGES val:33 [ 31.241656] BUG: Bad rss-counter state mm:0000000010d667a5 type:MM_ANONPAGES val:22 [ 31.729754] BUG: Bad rss-counter state mm:000000000d1e4cfb type:MM_FILEPAGES val:33 [ 31.730783] BUG: Bad rss-counter state mm:000000000d1e4cfb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33090' (ECDSA) to the list of known hosts. 2023/06/20 15:27:16 fuzzer started 2023/06/20 15:27:16 dialing manager at localhost:36067 2023/06/20 15:27:16 checking machine... 2023/06/20 15:27:16 checking revisions... [ 32.446043] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:27:16 testing simple program... [ 32.493926] cgroup: Unknown subsys name 'net' [ 32.543696] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:27:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed100340cf76 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88801a067ba0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856cd6a0 R15=0000000000000000 RIP=ffffffff812d9031 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 00007f942da3f900 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=00007f942dff70b0 CR3=000000000dcfe000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007fbab6242f40 CR3=000000000d902000 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=c59c58936cb881ae6c4ed3f3175268c2 XMM02=000000000011ae90eff9b2d0a8fce9cb XMM03=000000000011af602c67c8bc2e329bc3 XMM04=b3ba815f0abffdbf00000000000ae988 XMM05=dfcdbad4f1609c3700000000001330a0 XMM06=98b3d433a13cc1050000000000131f08 XMM07=e042d86d42eb936e0000000000121ae8 XMM08=f48ba3a85f598c27000000000011af60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000