syzkaller login: [ 28.751820] BUG: Bad rss-counter state mm:00000000f7b95d07 type:MM_FILEPAGES val:33 [ 28.753091] BUG: Bad rss-counter state mm:00000000f7b95d07 type:MM_ANONPAGES val:22 [ 28.899716] ================================================================== [ 28.900629] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.901572] Read of size 8 at addr ffff88800e35a4e0 by task sshd/219 [ 28.902344] [ 28.902569] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.903592] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.904597] Call Trace: [ 28.904918] [ 28.905200] dump_stack_lvl+0x91/0xf0 [ 28.905694] print_report+0xcc/0x620 [ 28.906180] ? __virt_addr_valid+0x102/0x340 [ 28.906737] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.907355] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.907974] kasan_report+0xbe/0xf0 [ 28.908455] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.909085] vma_interval_tree_remove+0xc75/0xec0 [ 28.909690] vma_prepare+0xc54/0x11a0 [ 28.910170] __split_vma+0x5af/0x950 [ 28.910647] ? __pfx___split_vma+0x10/0x10 [ 28.911172] ? find_held_lock+0x2c/0x110 [ 28.911694] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.912260] ? lock_is_held_type+0x9f/0x120 [ 28.912814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.913463] ? mtree_range_walk+0x632/0x900 [ 28.914017] ? mas_walk+0x5c7/0x7c0 [ 28.914490] do_vmi_munmap+0x1f1/0x2b0 [ 28.914978] mmap_region+0x1f9/0x2660 [ 28.915465] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.915979] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.916713] ? __pfx_lock_acquire+0x10/0x10 [ 28.917247] ? __pfx_mmap_region+0x10/0x10 [ 28.917781] ? security_mmap_addr+0x7d/0xa0 [ 28.918315] ? get_unmapped_area+0x1f5/0x3f0 [ 28.918872] do_mmap+0x854/0xf00 [ 28.919316] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.919813] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.920375] ksys_mmap_pgoff+0x3af/0x500 [ 28.920900] do_syscall_64+0x3f/0x90 [ 28.921383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.922122] RIP: 0033:0x7f561e00dd82 [ 28.922617] 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 [ 28.924805] RSP: 002b:00007fff7bcac868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.925711] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f561e00dd82 [ 28.926564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f561d447000 [ 28.927412] RBP: 00007f561d447000 R08: 0000000000000009 R09: 0000000000001000 [ 28.928260] R10: 0000000000000812 R11: 0000000000000206 R12: 000056187e51cf60 [ 28.929126] R13: 00007fff7bcac880 R14: 00007fff7bcac8b0 R15: 00007fff7bcacc10 [ 28.929990] [ 28.930283] [ 28.930499] Allocated by task 211: [ 28.930933] kasan_save_stack+0x22/0x50 [ 28.931440] kasan_set_track+0x25/0x30 [ 28.931940] __kasan_slab_alloc+0x59/0x70 [ 28.932467] kmem_cache_alloc+0x16b/0x370 [ 28.933001] vm_area_dup+0x20/0x160 [ 28.933458] __split_vma+0x170/0x950 [ 28.933949] split_vma+0xc6/0x110 [ 28.934397] mprotect_fixup+0x8d2/0xb30 [ 28.934913] do_mprotect_pkey+0x87e/0xd40 [ 28.935433] __x64_sys_mprotect+0x78/0xc0 [ 28.935967] do_syscall_64+0x3f/0x90 [ 28.936448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.937162] [ 28.937386] Freed by task 19: [ 28.937775] kasan_save_stack+0x22/0x50 [ 28.938280] kasan_set_track+0x25/0x30 [ 28.938778] kasan_save_free_info+0x2b/0x50 [ 28.939330] __kasan_slab_free+0x10a/0x190 [ 28.939891] kmem_cache_free+0x10d/0x4d0 [ 28.940418] rcu_core+0x8c8/0x2860 [ 28.940880] __do_softirq+0x1b7/0x7d4 [ 28.941364] [ 28.941580] Last potentially related work creation: [ 28.942165] kasan_save_stack+0x22/0x50 [ 28.942683] __kasan_record_aux_stack+0x8e/0xa0 [ 28.943283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.944025] remove_vma+0x139/0x170 [ 28.944542] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.945157] do_vmi_munmap+0x1f1/0x2b0 [ 28.945682] __vm_munmap+0x138/0x3a0 [ 28.946179] __x64_sys_munmap+0x59/0x80 [ 28.946709] do_syscall_64+0x3f/0x90 [ 28.947206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.947891] [ 28.948122] The buggy address belongs to the object at ffff88800e35a488 [ 28.948122] which belongs to the cache vm_area_struct of size 168 [ 28.949741] The buggy address is located 88 bytes inside of [ 28.949741] freed 168-byte region [ffff88800e35a488, ffff88800e35a530) [ 28.951271] [ 28.951502] The buggy address belongs to the physical page: [ 28.952228] page:000000007c94161e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe35a [ 28.953413] memcg:ffff88800e202c01 [ 28.953879] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.954627] page_type: 0xffffffff() [ 28.955117] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.956119] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e202c01 [ 28.957115] page dumped because: kasan: bad access detected [ 28.957833] [ 28.958063] Memory state around the buggy address: [ 28.958692] ffff88800e35a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.959616] ffff88800e35a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 28.960554] >ffff88800e35a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.961485] ^ [ 28.962311] ffff88800e35a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 28.963241] ffff88800e35a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.964195] ================================================================== [ 28.965201] Disabling lock debugging due to kernel taint [ 31.623680] BUG: Bad rss-counter state mm:00000000d9bc4b06 type:MM_FILEPAGES val:33 [ 31.624710] BUG: Bad rss-counter state mm:00000000d9bc4b06 type:MM_ANONPAGES val:22 [ 32.112687] BUG: Bad rss-counter state mm:00000000ebbdf7fd type:MM_FILEPAGES val:33 [ 32.113861] BUG: Bad rss-counter state mm:00000000ebbdf7fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33523' (ECDSA) to the list of known hosts. 2023/06/20 23:56:46 fuzzer started 2023/06/20 23:56:46 dialing manager at localhost:36067 2023/06/20 23:56:46 checking machine... 2023/06/20 23:56:46 checking revisions... [ 32.762816] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:56:46 testing simple program... [ 32.810896] cgroup: Unknown subsys name 'net' [ 32.847081] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:56:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652b60 RCX=0000000000000000 RDX=ffff8880096751c0 RSI=ffffffff814c8471 RDI=ffff8880096755b4 RBP=00007f82d196d477 RSP=ffff88800f2bf818 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f82d196d477 R13=0000000000000000 R14=ffff8880096751c0 R15=0000000000092cc0 RIP=ffffffff814c8474 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 00007f82d147a900 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=00007ffc0bcee000 CR3=000000001002c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f9b86d1b000 CR3=000000000d880000 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=2036343a36353a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a36353a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000