syzkaller login: [ 31.219285] BUG: Bad rss-counter state mm:00000000c1c4cd6e type:MM_FILEPAGES val:33 [ 31.220323] BUG: Bad rss-counter state mm:00000000c1c4cd6e type:MM_ANONPAGES val:22 [ 31.331300] ================================================================== [ 31.331935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.332660] Read of size 8 at addr ffff888019ca24e0 by task sshd/219 [ 31.333194] [ 31.333369] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.333934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.334593] Call Trace: [ 31.334807] [ 31.335003] dump_stack_lvl+0x91/0xf0 [ 31.335371] print_report+0xcc/0x620 [ 31.335967] ? __virt_addr_valid+0x102/0x340 [ 31.336386] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336849] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.337318] kasan_report+0xbe/0xf0 [ 31.337649] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.338080] vma_interval_tree_remove+0xc75/0xec0 [ 31.338535] vma_prepare+0xc54/0x11a0 [ 31.338864] __split_vma+0x5af/0x950 [ 31.339218] ? __pfx___split_vma+0x10/0x10 [ 31.339575] ? find_held_lock+0x2c/0x110 [ 31.339948] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.340396] ? lock_is_held_type+0x9f/0x120 [ 31.340823] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.341237] ? mtree_range_walk+0x632/0x900 [ 31.341600] ? mas_walk+0x5c7/0x7c0 [ 31.341951] do_vmi_munmap+0x1f1/0x2b0 [ 31.342310] mmap_region+0x1f9/0x2660 [ 31.342629] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.342968] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.343441] ? __pfx_lock_acquire+0x10/0x10 [ 31.343781] ? __pfx_mmap_region+0x10/0x10 [ 31.344135] ? security_mmap_addr+0x7d/0xa0 [ 31.344513] ? get_unmapped_area+0x1f5/0x3f0 [ 31.344944] do_mmap+0x854/0xf00 [ 31.345290] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.345616] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.345986] ksys_mmap_pgoff+0x3af/0x500 [ 31.346335] do_syscall_64+0x3f/0x90 [ 31.346670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.347124] RIP: 0033:0x7f82c4453d82 [ 31.347421] 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 [ 31.349004] RSP: 002b:00007ffecb6a2918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.349602] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82c4453d82 [ 31.350149] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82c388d000 [ 31.350712] RBP: 00007f82c388d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.351272] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da31c3eec0 [ 31.351849] R13: 00007ffecb6a2930 R14: 00007ffecb6a2960 R15: 00007ffecb6a2cc0 [ 31.352435] [ 31.352646] [ 31.352784] Allocated by task 212: [ 31.353056] kasan_save_stack+0x22/0x50 [ 31.353380] kasan_set_track+0x25/0x30 [ 31.353704] __kasan_slab_alloc+0x59/0x70 [ 31.354069] kmem_cache_alloc+0x16b/0x370 [ 31.354435] vm_area_dup+0x20/0x160 [ 31.354734] __split_vma+0x170/0x950 [ 31.355046] split_vma+0xc6/0x110 [ 31.355348] mprotect_fixup+0x8d2/0xb30 [ 31.355686] do_mprotect_pkey+0x87e/0xd40 [ 31.356021] __x64_sys_mprotect+0x78/0xc0 [ 31.356378] do_syscall_64+0x3f/0x90 [ 31.356723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.357141] [ 31.357287] Freed by task 202: [ 31.357581] kasan_save_stack+0x22/0x50 [ 31.357935] kasan_set_track+0x25/0x30 [ 31.358268] kasan_save_free_info+0x2b/0x50 [ 31.358622] __kasan_slab_free+0x10a/0x190 [ 31.358970] kmem_cache_free+0x10d/0x4d0 [ 31.359279] rcu_core+0x8c8/0x2860 [ 31.359563] __do_softirq+0x1b7/0x7d4 [ 31.359861] [ 31.359999] Last potentially related work creation: [ 31.360399] kasan_save_stack+0x22/0x50 [ 31.360810] __kasan_record_aux_stack+0x8e/0xa0 [ 31.361209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.361644] remove_vma+0x139/0x170 [ 31.361945] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.362322] do_vmi_munmap+0x1f1/0x2b0 [ 31.362640] __vm_munmap+0x138/0x3a0 [ 31.362946] __x64_sys_munmap+0x59/0x80 [ 31.363266] do_syscall_64+0x3f/0x90 [ 31.363576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.364023] [ 31.364162] The buggy address belongs to the object at ffff888019ca2488 [ 31.364162] which belongs to the cache vm_area_struct of size 168 [ 31.365152] The buggy address is located 88 bytes inside of [ 31.365152] freed 168-byte region [ffff888019ca2488, ffff888019ca2530) [ 31.366076] [ 31.366222] The buggy address belongs to the physical page: [ 31.366652] page:00000000fa73ae5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ca2 [ 31.367420] memcg:ffff88800c583201 [ 31.367689] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.368087] page_type: 0xffffffff() [ 31.368389] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.369006] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c583201 [ 31.369587] page dumped because: kasan: bad access detected [ 31.370019] [ 31.370173] Memory state around the buggy address: [ 31.370572] ffff888019ca2380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.371147] ffff888019ca2400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.371708] >ffff888019ca2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.372274] ^ [ 31.372804] ffff888019ca2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.373361] ffff888019ca2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.373916] ================================================================== [ 31.374632] Disabling lock debugging due to kernel taint [ 33.309557] BUG: Bad rss-counter state mm:00000000ca645791 type:MM_FILEPAGES val:33 [ 33.310325] BUG: Bad rss-counter state mm:00000000ca645791 type:MM_ANONPAGES val:22 [ 33.606405] BUG: Bad rss-counter state mm:00000000372e7dcc type:MM_FILEPAGES val:33 [ 33.607089] BUG: Bad rss-counter state mm:00000000372e7dcc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63850' (ECDSA) to the list of known hosts. 2023/06/21 09:29:18 fuzzer started 2023/06/21 09:29:18 dialing manager at localhost:36067 2023/06/21 09:29:18 checking machine... 2023/06/21 09:29:18 checking revisions... [ 34.200339] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:29:18 testing simple program... [ 34.229286] cgroup: Unknown subsys name 'net' [ 34.278409] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:29:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffdc5f55558 CR3=000000000d852000 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=2037313a39323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a39323a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed10032e600a RBX=ffffed10032e600b RCX=ffffffff81af9e69 RDX=ffffed10032e600b RSI=0000000000000008 RDI=ffff888019730050 RBP=ffffed10032e600a RSP=ffff88801caefca0 R8 =0000000000000000 R9 =ffffed10032e600a R10=ffff888019730057 R11=00000000000b6a61 R12=ffff88800f600a00 R13=ffff888019730050 R14=ffffffff81af9e40 R15=ffff8880197302b0 RIP=ffffffff8180f189 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 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=00007effa8e3c328 CR3=0000000005482000 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