syzkaller login: [ 29.556052] BUG: Bad rss-counter state mm:0000000073391977 type:MM_FILEPAGES val:33 [ 29.557797] BUG: Bad rss-counter state mm:0000000073391977 type:MM_ANONPAGES val:22 [ 29.748624] ================================================================== [ 29.749536] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.750478] Read of size 8 at addr ffff88800d77c228 by task sshd/220 [ 29.751248] [ 29.751479] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.752487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.753470] Call Trace: [ 29.753789] [ 29.754100] dump_stack_lvl+0x91/0xf0 [ 29.754594] print_report+0xcc/0x620 [ 29.755076] ? __virt_addr_valid+0x102/0x340 [ 29.755646] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.756268] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.756884] kasan_report+0xbe/0xf0 [ 29.757357] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.757983] vma_interval_tree_remove+0xc75/0xec0 [ 29.758605] vma_prepare+0xc54/0x11a0 [ 29.759092] __split_vma+0x5af/0x950 [ 29.759571] ? __pfx___split_vma+0x10/0x10 [ 29.760102] ? find_held_lock+0x2c/0x110 [ 29.760625] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.761194] ? lock_is_held_type+0x9f/0x120 [ 29.761743] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.762357] ? mtree_range_walk+0x632/0x900 [ 29.762907] ? mas_walk+0x5c7/0x7c0 [ 29.763383] do_vmi_munmap+0x1f1/0x2b0 [ 29.763894] mmap_region+0x1f9/0x2660 [ 29.764383] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.764890] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.765606] ? __pfx_lock_acquire+0x10/0x10 [ 29.766136] ? __pfx_mmap_region+0x10/0x10 [ 29.766669] ? security_mmap_addr+0x7d/0xa0 [ 29.767207] ? get_unmapped_area+0x1f5/0x3f0 [ 29.767774] do_mmap+0x854/0xf00 [ 29.768217] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.768720] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.769278] ksys_mmap_pgoff+0x3af/0x500 [ 29.769788] do_syscall_64+0x3f/0x90 [ 29.770265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.770915] RIP: 0033:0x7f26b1de6d82 [ 29.771371] 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 [ 29.773519] RSP: 002b:00007ffd26299218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.774434] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26b1de6d82 [ 29.775272] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26b1220000 [ 29.776144] RBP: 00007f26b1220000 R08: 0000000000000009 R09: 0000000000001000 [ 29.776998] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ceb764f60 [ 29.777844] R13: 00007ffd26299230 R14: 00007ffd26299260 R15: 00007ffd262995c0 [ 29.778712] [ 29.779005] [ 29.779225] Allocated by task 213: [ 29.779665] kasan_save_stack+0x22/0x50 [ 29.780170] kasan_set_track+0x25/0x30 [ 29.780667] __kasan_slab_alloc+0x59/0x70 [ 29.781201] kmem_cache_alloc+0x16b/0x370 [ 29.781719] vm_area_dup+0x20/0x160 [ 29.782174] __split_vma+0x170/0x950 [ 29.782646] split_vma+0xc6/0x110 [ 29.783086] mprotect_fixup+0x8d2/0xb30 [ 29.783605] do_mprotect_pkey+0x87e/0xd40 [ 29.784127] __x64_sys_mprotect+0x78/0xc0 [ 29.784649] do_syscall_64+0x3f/0x90 [ 29.785122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.785769] [ 29.785984] Freed by task 213: [ 29.786373] kasan_save_stack+0x22/0x50 [ 29.786884] kasan_set_track+0x25/0x30 [ 29.787374] kasan_save_free_info+0x2b/0x50 [ 29.787929] __kasan_slab_free+0x10a/0x190 [ 29.788472] kmem_cache_free+0x10d/0x4d0 [ 29.788973] rcu_core+0x8c8/0x2860 [ 29.789420] __do_softirq+0x1b7/0x7d4 [ 29.789896] [ 29.790120] Last potentially related work creation: [ 29.790699] kasan_save_stack+0x22/0x50 [ 29.791203] __kasan_record_aux_stack+0x8e/0xa0 [ 29.791792] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.792445] remove_vma+0x139/0x170 [ 29.792902] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.793471] do_vmi_munmap+0x1f1/0x2b0 [ 29.793957] __vm_munmap+0x138/0x3a0 [ 29.794423] __x64_sys_munmap+0x59/0x80 [ 29.794919] do_syscall_64+0x3f/0x90 [ 29.795400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.796052] [ 29.796267] Second to last potentially related work creation: [ 29.796949] kasan_save_stack+0x22/0x50 [ 29.797448] __kasan_record_aux_stack+0x8e/0xa0 [ 29.798021] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.798653] remove_vma+0x139/0x170 [ 29.799101] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.799676] do_vmi_munmap+0x1f1/0x2b0 [ 29.800175] mmap_region+0x1f9/0x2660 [ 29.800649] do_mmap+0x854/0xf00 [ 29.801082] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.801567] ksys_mmap_pgoff+0x3af/0x500 [ 29.802061] do_syscall_64+0x3f/0x90 [ 29.802539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.803186] [ 29.803404] The buggy address belongs to the object at ffff88800d77c1d0 [ 29.803404] which belongs to the cache vm_area_struct of size 168 [ 29.804883] The buggy address is located 88 bytes inside of [ 29.804883] freed 168-byte region [ffff88800d77c1d0, ffff88800d77c278) [ 29.806299] [ 29.806514] The buggy address belongs to the physical page: [ 29.807173] page:000000001e71ce49 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd77c [ 29.808267] memcg:ffff88800d761e01 [ 29.808688] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.809393] page_type: 0xffffffff() [ 29.809842] raw: 0100000000000200 ffff88800879fc80 ffffea00003b2580 dead000000000005 [ 29.810748] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d761e01 [ 29.811665] page dumped because: kasan: bad access detected [ 29.812329] [ 29.812548] Memory state around the buggy address: [ 29.813154] ffff88800d77c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.814006] ffff88800d77c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.814865] >ffff88800d77c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.815726] ^ [ 29.816298] ffff88800d77c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 29.817183] ffff88800d77c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 29.818084] ================================================================== [ 29.819380] Disabling lock debugging due to kernel taint [ 32.333683] BUG: Bad rss-counter state mm:00000000ba1fbadf type:MM_FILEPAGES val:33 [ 32.334457] BUG: Bad rss-counter state mm:00000000ba1fbadf type:MM_ANONPAGES val:22 [ 32.764051] BUG: Bad rss-counter state mm:00000000968afbda type:MM_FILEPAGES val:33 [ 32.764824] BUG: Bad rss-counter state mm:00000000968afbda type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9766' (ECDSA) to the list of known hosts. 2023/06/19 18:50:18 fuzzer started 2023/06/19 18:50:19 dialing manager at localhost:44161 2023/06/19 18:50:19 checking machine... 2023/06/19 18:50:19 checking revisions... [ 33.418042] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:50:19 testing simple program... [ 33.458015] cgroup: Unknown subsys name 'net' [ 33.506671] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:50:18 Registers: info registers vcpu 0 RAX=1ffffffff0c26ea3 RBX=0000000000000001 RCX=ffffffff8613751a RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff8880147af4e8 RBP=ffff8880147af4d8 RSP=ffff8880147af410 R8 =ffffffff8613751e R9 =ffff8880147af4c0 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880147af4e0 R13=ffff8880147af4c8 R14=ffff8880147af7d0 R15=ffff8880147af480 RIP=ffffffff81131118 RFL=00000217 [----APC] 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 00007f826ef7a900 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=00007f826e3c9b50 CR3=000000000d54e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0a760c508e1e8e6900000000000ae988 XMM05=8a55507aefaf00770000000000136668 XMM06=c291bd5c70af25b90000000000135458 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110028e0fb2 RSI=ffffffff81710c75 RDI=0000000000000005 RBP=ffff888014707d90 RSP=ffff888014707c00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea0000692a00 R13=ffff88801c032488 R14=ffff888014707db8 R15=ffffea0000692a34 RIP=ffffffff81710c8a 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcb73fea900 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=00007fcb74b8d0f0 CR3=000000000ebb8000 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=6720646572637465733a4d41503d706f 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