syzkaller login: [ 210.197930] BUG: Bad rss-counter state mm:000000003b2d543d type:MM_FILEPAGES val:33 [ 210.199312] BUG: Bad rss-counter state mm:000000003b2d543d type:MM_ANONPAGES val:22 [ 210.347027] ================================================================== [ 210.347959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 210.348839] Read of size 8 at addr ffff88800e509df0 by task sshd/221 [ 210.349934] [ 210.350196] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 210.351167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 210.352100] Call Trace: [ 210.352398] [ 210.352666] dump_stack_lvl+0x91/0xf0 [ 210.353143] print_report+0xcc/0x620 [ 210.353603] ? __virt_addr_valid+0x102/0x340 [ 210.354176] ? vma_interval_tree_remove+0xc75/0xec0 [ 210.354782] ? vma_interval_tree_remove+0xc75/0xec0 [ 210.355383] kasan_report+0xbe/0xf0 [ 210.355852] ? vma_interval_tree_remove+0xc75/0xec0 [ 210.356439] vma_interval_tree_remove+0xc75/0xec0 [ 210.357021] vma_prepare+0xc54/0x11a0 [ 210.357505] __split_vma+0x5af/0x950 [ 210.357999] ? __pfx___split_vma+0x10/0x10 [ 210.358522] ? find_held_lock+0x2c/0x110 [ 210.359060] do_vmi_align_munmap+0x2ba/0x11f0 [ 210.359622] ? lock_is_held_type+0x9f/0x120 [ 210.360199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 210.360825] ? mtree_range_walk+0x632/0x900 [ 210.361375] ? mas_walk+0x5c7/0x7c0 [ 210.361867] do_vmi_munmap+0x1f1/0x2b0 [ 210.362364] mmap_region+0x1f9/0x2660 [ 210.362858] ? vm_mmap_pgoff+0x15c/0x3a0 [ 210.363371] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 210.364093] ? __pfx_lock_acquire+0x10/0x10 [ 210.364628] ? __pfx_mmap_region+0x10/0x10 [ 210.365183] ? security_mmap_addr+0x7d/0xa0 [ 210.365728] ? get_unmapped_area+0x1f5/0x3f0 [ 210.366296] do_mmap+0x854/0xf00 [ 210.366750] vm_mmap_pgoff+0x1a6/0x3a0 [ 210.367246] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 210.367816] ksys_mmap_pgoff+0x3af/0x500 [ 210.368314] do_syscall_64+0x3f/0x90 [ 210.368796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 210.369444] RIP: 0033:0x7f5937a31d82 [ 210.369943] 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 [ 210.372080] RSP: 002b:00007ffdcec918e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 210.372986] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5937a31d82 [ 210.373854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5936e6b000 [ 210.374703] RBP: 00007f5936e6b000 R08: 0000000000000009 R09: 0000000000001000 [ 210.375574] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f8f677ec0 [ 210.376430] R13: 00007ffdcec91900 R14: 00007ffdcec91930 R15: 00007ffdcec91c90 [ 210.377296] [ 210.377592] [ 210.377820] Allocated by task 214: [ 210.378276] kasan_save_stack+0x22/0x50 [ 210.378793] kasan_set_track+0x25/0x30 [ 210.379291] __kasan_slab_alloc+0x59/0x70 [ 210.379844] kmem_cache_alloc+0x16b/0x370 [ 210.380360] vm_area_dup+0x20/0x160 [ 210.380818] __split_vma+0x170/0x950 [ 210.381279] split_vma+0xc6/0x110 [ 210.381715] mprotect_fixup+0x8d2/0xb30 [ 210.382240] do_mprotect_pkey+0x87e/0xd40 [ 210.382762] __x64_sys_mprotect+0x78/0xc0 [ 210.383280] do_syscall_64+0x3f/0x90 [ 210.383768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 210.384398] [ 210.384612] Freed by task 200: [ 210.385044] kasan_save_stack+0x22/0x50 [ 210.385548] kasan_set_track+0x25/0x30 [ 210.386068] kasan_save_free_info+0x2b/0x50 [ 210.386589] __kasan_slab_free+0x10a/0x190 [ 210.387132] kmem_cache_free+0x10d/0x4d0 [ 210.387626] rcu_core+0x8c8/0x2860 [ 210.388090] __do_softirq+0x1b7/0x7d4 [ 210.388569] [ 210.388797] Last potentially related work creation: [ 210.389386] kasan_save_stack+0x22/0x50 [ 210.389987] __kasan_record_aux_stack+0x8e/0xa0 [ 210.390673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 210.391336] remove_vma+0x139/0x170 [ 210.391794] do_vmi_align_munmap+0xd4a/0x11f0 [ 210.392349] do_vmi_munmap+0x1f1/0x2b0 [ 210.392842] __vm_munmap+0x138/0x3a0 [ 210.393310] __x64_sys_munmap+0x59/0x80 [ 210.393820] do_syscall_64+0x3f/0x90 [ 210.394330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 210.395005] [ 210.395220] The buggy address belongs to the object at ffff88800e509d98 [ 210.395220] which belongs to the cache vm_area_struct of size 168 [ 210.396696] The buggy address is located 88 bytes inside of [ 210.396696] freed 168-byte region [ffff88800e509d98, ffff88800e509e40) [ 210.398129] [ 210.398347] The buggy address belongs to the physical page: [ 210.399018] page:0000000082b9adde refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe509 [ 210.400115] memcg:ffff888016935f01 [ 210.400540] flags: 0x100000000000200(slab|node=0|zone=1) [ 210.401196] page_type: 0xffffffff() [ 210.401641] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 210.402577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016935f01 [ 210.403483] page dumped because: kasan: bad access detected [ 210.404153] [ 210.404365] Memory state around the buggy address: [ 210.404991] ffff88800e509c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 210.405877] ffff88800e509d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 210.406740] >ffff88800e509d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 210.407579] ^ [ 210.408389] ffff88800e509e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 210.409242] ffff88800e509e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 210.410206] ================================================================== [ 210.411318] Disabling lock debugging due to kernel taint [ 213.236060] BUG: Bad rss-counter state mm:000000000c4bc990 type:MM_FILEPAGES val:33 [ 213.237219] BUG: Bad rss-counter state mm:000000000c4bc990 type:MM_ANONPAGES val:22 [ 213.704630] BUG: Bad rss-counter state mm:0000000094b046af type:MM_FILEPAGES val:33 [ 213.705814] BUG: Bad rss-counter state mm:0000000094b046af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17065' (ECDSA) to the list of known hosts. 2023/06/19 21:01:41 fuzzer started 2023/06/19 21:01:41 dialing manager at localhost:44161 2023/06/19 21:01:41 checking machine... 2023/06/19 21:01:41 checking revisions... [ 214.387510] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:01:42 testing simple program... [ 214.439336] cgroup: Unknown subsys name 'net' [ 214.478963] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:58:41 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007fc400347ace RCX=ffffffff81007b62 RDX=ffff888014539b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff8880146df388 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6c88 R12=ffff8880146df4d0 R13=0000000000000000 R14=ffff888014539b40 R15=ffff88800ddb0500 RIP=ffffffff814c07eb RFL=00000297 [--S-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 00007fc3ff7c3900 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=00007fc3febdaee0 CR3=000000000ce9a000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=311aceee1cd867f700000000000ae988 XMM05=6f9a0b4e773cb7580000000000148440 XMM06=e4cb8bb95a7664b600000000001475a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffcfaabd308 CR3=000000000dc68000 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=2031343a31303a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a31303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000