syzkaller login: [ 42.823748] BUG: Bad rss-counter state mm:000000009d6c908e type:MM_FILEPAGES val:33 [ 42.824965] BUG: Bad rss-counter state mm:000000009d6c908e type:MM_ANONPAGES val:22 [ 42.982289] ================================================================== [ 42.983401] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.984553] Read of size 8 at addr ffff88800f1e94e0 by task sshd/218 [ 42.985460] [ 42.985684] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.986576] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.987619] Call Trace: [ 42.987958] [ 42.988254] dump_stack_lvl+0x91/0xf0 [ 42.988769] print_report+0xcc/0x620 [ 42.989287] ? __virt_addr_valid+0x102/0x340 [ 42.989873] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.990533] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.991201] kasan_report+0xbe/0xf0 [ 42.991711] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.992370] vma_interval_tree_remove+0xc75/0xec0 [ 42.993020] vma_prepare+0xc54/0x11a0 [ 42.993529] __split_vma+0x5af/0x950 [ 42.994026] ? __pfx___split_vma+0x10/0x10 [ 42.994583] ? find_held_lock+0x2c/0x110 [ 42.995130] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.995757] ? lock_is_held_type+0x9f/0x120 [ 42.996332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.996992] ? mtree_range_walk+0x632/0x900 [ 42.997582] ? mas_walk+0x5c7/0x7c0 [ 42.998099] do_vmi_munmap+0x1f1/0x2b0 [ 42.998618] mmap_region+0x1f9/0x2660 [ 42.999124] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.999685] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.000451] ? __pfx_lock_acquire+0x10/0x10 [ 43.001022] ? __pfx_mmap_region+0x10/0x10 [ 43.001583] ? security_mmap_addr+0x7d/0xa0 [ 43.002244] ? get_unmapped_area+0x1f5/0x3f0 [ 43.002905] do_mmap+0x854/0xf00 [ 43.003373] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.003942] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.004629] ksys_mmap_pgoff+0x3af/0x500 [ 43.005266] do_syscall_64+0x3f/0x90 [ 43.005862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.006669] RIP: 0033:0x7faf4f1cdd82 [ 43.007237] 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 [ 43.009924] RSP: 002b:00007ffc58f83688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.011072] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf4f1cdd82 [ 43.012136] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf4e607000 [ 43.013209] RBP: 00007faf4e607000 R08: 0000000000000009 R09: 0000000000001000 [ 43.014272] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560954367ec0 [ 43.015338] R13: 00007ffc58f836a0 R14: 00007ffc58f836d0 R15: 00007ffc58f83a30 [ 43.016438] [ 43.016810] [ 43.017081] Allocated by task 211: [ 43.017603] kasan_save_stack+0x22/0x50 [ 43.018223] kasan_set_track+0x25/0x30 [ 43.018857] __kasan_slab_alloc+0x59/0x70 [ 43.019507] kmem_cache_alloc+0x16b/0x370 [ 43.020173] vm_area_dup+0x20/0x160 [ 43.020729] __split_vma+0x170/0x950 [ 43.021312] split_vma+0xc6/0x110 [ 43.021859] mprotect_fixup+0x8d2/0xb30 [ 43.022478] do_mprotect_pkey+0x87e/0xd40 [ 43.023128] __x64_sys_mprotect+0x78/0xc0 [ 43.023798] do_syscall_64+0x3f/0x90 [ 43.024382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.025179] [ 43.025445] Freed by task 211: [ 43.025932] kasan_save_stack+0x22/0x50 [ 43.026552] kasan_set_track+0x25/0x30 [ 43.027166] kasan_save_free_info+0x2b/0x50 [ 43.027841] __kasan_slab_free+0x10a/0x190 [ 43.028502] kmem_cache_free+0x10d/0x4d0 [ 43.029123] rcu_core+0x8c8/0x2860 [ 43.029674] __do_softirq+0x1b7/0x7d4 [ 43.030274] [ 43.030543] Last potentially related work creation: [ 43.031300] kasan_save_stack+0x22/0x50 [ 43.031939] __kasan_record_aux_stack+0x8e/0xa0 [ 43.032652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.033455] remove_vma+0x139/0x170 [ 43.034022] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.034724] do_vmi_munmap+0x1f1/0x2b0 [ 43.035316] __vm_munmap+0x138/0x3a0 [ 43.035913] __x64_sys_munmap+0x59/0x80 [ 43.036531] do_syscall_64+0x3f/0x90 [ 43.037124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.037932] [ 43.038194] The buggy address belongs to the object at ffff88800f1e9488 [ 43.038194] which belongs to the cache vm_area_struct of size 168 [ 43.039800] The buggy address is located 88 bytes inside of [ 43.039800] freed 168-byte region [ffff88800f1e9488, ffff88800f1e9530) [ 43.041241] [ 43.041459] The buggy address belongs to the physical page: [ 43.042129] page:00000000f3f9dbda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1e9 [ 43.043316] memcg:ffff888015baa101 [ 43.043757] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.044399] page_type: 0xffffffff() [ 43.044855] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.045755] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015baa101 [ 43.046614] page dumped because: kasan: bad access detected [ 43.047245] [ 43.047452] Memory state around the buggy address: [ 43.048073] ffff88800f1e9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.048886] ffff88800f1e9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 43.049692] >ffff88800f1e9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.050495] ^ [ 43.051259] ffff88800f1e9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 43.052124] ffff88800f1e9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.053025] ================================================================== [ 43.054141] Disabling lock debugging due to kernel taint [ 45.198793] BUG: Bad rss-counter state mm:0000000041d873eb type:MM_FILEPAGES val:33 [ 45.200136] BUG: Bad rss-counter state mm:0000000041d873eb type:MM_ANONPAGES val:22 [ 45.600750] BUG: Bad rss-counter state mm:0000000012583254 type:MM_FILEPAGES val:33 [ 45.602078] BUG: Bad rss-counter state mm:0000000012583254 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17894' (ECDSA) to the list of known hosts. 2023/06/19 18:45:25 fuzzer started 2023/06/19 18:45:25 dialing manager at localhost:44161 2023/06/19 18:45:25 checking machine... 2023/06/19 18:45:25 checking revisions... [ 46.377327] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:45:25 testing simple program... [ 46.433941] cgroup: Unknown subsys name 'net' [ 46.505611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:45:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f471f9e5690 CR3=000000000d5ce000 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=adf44179fbac7bb4dd4d4266f5ca5809 XMM02=000000000011d668ec2efd57dc4c00df XMM03=0000000000124028c5fdd125f0a736b1 XMM04=aea2dd742174c35000000000000ae988 XMM05=751b9502027dc0b90000000000133900 XMM06=33bfbef7d136749d0000000000132ad8 XMM07=e042d86d42eb936e0000000000124300 XMM08=c5fdd125f0a736b1000000000011d6c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f30d0bc5598 RCX=0000000000000000 RDX=0000000000000001 RSI=00007f30d1772740 RDI=00007f30d0bc6000 RBP=00007f30d0bc6000 RSP=00007ffe88495450 R8 =000055f26f9cb0d0 R9 =0000000000000000 R10=0000000000000003 R11=0000000200000000 R12=000055f26f9ea8b0 R13=00007f30d119bae8 R14=0000000000000020 R15=0000000000000000 RIP=00007f30d1019a2d RFL=00010246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f30d0be7900 00000000 00000000 GS =0000 0000000000000000 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=00007f30d119bae8 CR3=000000001642a000 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