syzkaller login: [ 33.742226] BUG: Bad rss-counter state mm:00000000be06d91b type:MM_FILEPAGES val:33 [ 33.743657] BUG: Bad rss-counter state mm:00000000be06d91b type:MM_ANONPAGES val:22 [ 33.885364] ================================================================== [ 33.886280] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.887210] Read of size 8 at addr ffff88801a000798 by task sshd/220 [ 33.887979] [ 33.888197] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.889220] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.890201] Call Trace: [ 33.890523] [ 33.890806] dump_stack_lvl+0x91/0xf0 [ 33.891327] print_report+0xcc/0x620 [ 33.891813] ? __virt_addr_valid+0x102/0x340 [ 33.892396] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.893041] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.893692] kasan_report+0xbe/0xf0 [ 33.894193] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.894844] vma_interval_tree_remove+0xc75/0xec0 [ 33.895473] vma_prepare+0xc54/0x11a0 [ 33.895979] __split_vma+0x5af/0x950 [ 33.896470] ? __pfx___split_vma+0x10/0x10 [ 33.897026] ? find_held_lock+0x2c/0x110 [ 33.897584] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.898184] ? lock_is_held_type+0x9f/0x120 [ 33.898746] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.899386] ? mtree_range_walk+0x632/0x900 [ 33.899991] ? mas_walk+0x5c7/0x7c0 [ 33.900480] do_vmi_munmap+0x1f1/0x2b0 [ 33.900992] mmap_region+0x1f9/0x2660 [ 33.901499] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.902033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.902788] ? __pfx_lock_acquire+0x10/0x10 [ 33.903348] ? __pfx_mmap_region+0x10/0x10 [ 33.903923] ? security_mmap_addr+0x7d/0xa0 [ 33.904483] ? get_unmapped_area+0x1f5/0x3f0 [ 33.905072] do_mmap+0x854/0xf00 [ 33.905540] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.906058] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.906636] ksys_mmap_pgoff+0x3af/0x500 [ 33.907158] do_syscall_64+0x3f/0x90 [ 33.907651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.908344] RIP: 0033:0x7f627758fd82 [ 33.908813] 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 [ 33.911052] RSP: 002b:00007ffd1c32ea48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.911998] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f627758fd82 [ 33.912887] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62769c9000 [ 33.913775] RBP: 00007f62769c9000 R08: 0000000000000009 R09: 0000000000001000 [ 33.914621] R10: 0000000000000812 R11: 0000000000000206 R12: 00005555dab35ec0 [ 33.915471] R13: 00007ffd1c32ea60 R14: 00007ffd1c32ea90 R15: 00007ffd1c32edf0 [ 33.916341] [ 33.916626] [ 33.916839] Allocated by task 213: [ 33.917268] kasan_save_stack+0x22/0x50 [ 33.917767] kasan_set_track+0x25/0x30 [ 33.918254] __kasan_slab_alloc+0x59/0x70 [ 33.918779] kmem_cache_alloc+0x16b/0x370 [ 33.919296] vm_area_dup+0x20/0x160 [ 33.919742] __split_vma+0x170/0x950 [ 33.920216] split_vma+0xc6/0x110 [ 33.920652] mprotect_fixup+0x8d2/0xb30 [ 33.921151] do_mprotect_pkey+0x87e/0xd40 [ 33.921676] __x64_sys_mprotect+0x78/0xc0 [ 33.922191] do_syscall_64+0x3f/0x90 [ 33.922668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.923305] [ 33.923522] Freed by task 13: [ 33.923923] kasan_save_stack+0x22/0x50 [ 33.924421] kasan_set_track+0x25/0x30 [ 33.924910] kasan_save_free_info+0x2b/0x50 [ 33.925437] __kasan_slab_free+0x10a/0x190 [ 33.925973] kmem_cache_free+0x10d/0x4d0 [ 33.926476] rcu_core+0x8c8/0x2860 [ 33.926916] __do_softirq+0x1b7/0x7d4 [ 33.927394] [ 33.927609] Last potentially related work creation: [ 33.928203] kasan_save_stack+0x22/0x50 [ 33.928698] __kasan_record_aux_stack+0x8e/0xa0 [ 33.929270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.929906] remove_vma+0x139/0x170 [ 33.930430] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.930989] do_vmi_munmap+0x1f1/0x2b0 [ 33.931469] __vm_munmap+0x138/0x3a0 [ 33.931945] __x64_sys_munmap+0x59/0x80 [ 33.932437] do_syscall_64+0x3f/0x90 [ 33.932910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.933585] [ 33.933806] The buggy address belongs to the object at ffff88801a000740 [ 33.933806] which belongs to the cache vm_area_struct of size 168 [ 33.935310] The buggy address is located 88 bytes inside of [ 33.935310] freed 168-byte region [ffff88801a000740, ffff88801a0007e8) [ 33.936773] [ 33.936995] The buggy address belongs to the physical page: [ 33.937655] page:00000000195cfda4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a000 [ 33.938782] memcg:ffff88800e4e0f01 [ 33.939213] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.939934] page_type: 0xffffffff() [ 33.940401] raw: 0100000000000200 ffff88800879fc80 ffffea000039bcc0 dead000000000005 [ 33.941322] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4e0f01 [ 33.942168] page dumped because: kasan: bad access detected [ 33.942800] [ 33.943006] Memory state around the buggy address: [ 33.943550] ffff88801a000680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.944353] ffff88801a000700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.945158] >ffff88801a000780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.946042] ^ [ 33.946501] ffff88801a000800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.947305] ffff88801a000880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.948126] ================================================================== [ 33.949006] Disabling lock debugging due to kernel taint [ 35.761451] BUG: Bad rss-counter state mm:00000000a15d3b7f type:MM_FILEPAGES val:33 [ 35.762227] BUG: Bad rss-counter state mm:00000000a15d3b7f type:MM_ANONPAGES val:22 [ 36.223856] BUG: Bad rss-counter state mm:000000003f49148c type:MM_FILEPAGES val:33 [ 36.224796] BUG: Bad rss-counter state mm:000000003f49148c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24743' (ECDSA) to the list of known hosts. 2023/06/20 04:33:10 fuzzer started 2023/06/20 04:33:10 dialing manager at localhost:44161 2023/06/20 04:33:10 checking machine... 2023/06/20 04:33:10 checking revisions... [ 36.940842] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:33:10 testing simple program... [ 36.997873] cgroup: Unknown subsys name 'net' [ 37.041518] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:33:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8363de42 RDX=00000000000263de RSI=00000000000263de RDI=ffffffff86580b38 RBP=ffff88801a0df9f8 RSP=ffff88801a0df930 R8 =0000000000000000 R9 =ffff88801a0df9e0 R10=0000000000038001 R11=000000000008a96b R12=ffff88801a0dfa00 R13=ffff88801a0df9e8 R14=ffff88801a0df9e1 R15=ffff88801a0df9a0 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007f7c65e60900 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=00007f7c66417618 CR3=000000000c544000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000003 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8182839d RSP=ffff88806cf09d60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000200 R13=ffff88806cf361c8 R14=0000000000000003 R15=ffff8880146c2000 RIP=ffffffff81534237 RFL=00000002 [-------] 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=00007f18130705d0 CR3=000000000d6c8000 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=8b11d3673b75c7bdd2454f3a6102cb05 XMM02=ec2efd57dc4c00df000000000011f258 XMM03=c39dd5dca40fe734000000000011f328 XMM04=093634f90be16e7c00000000000ae988 XMM05=19e9129bd510f2350000000000133558 XMM06=d51e7333e302ac4b00000000001323c0 XMM07=e042d86d42eb936e0000000000123ce8 XMM08=c39dd5dca40fe734000000000011f328 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000