syzkaller login: [ 35.061534] BUG: Bad rss-counter state mm:0000000064c2dbb9 type:MM_FILEPAGES val:33 [ 35.062682] BUG: Bad rss-counter state mm:0000000064c2dbb9 type:MM_ANONPAGES val:22 [ 35.218993] ================================================================== [ 35.220066] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.221168] Read of size 8 at addr ffff88800df85a50 by task sshd/219 [ 35.222213] [ 35.222432] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.223291] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.224309] Call Trace: [ 35.224626] [ 35.224906] dump_stack_lvl+0x91/0xf0 [ 35.225410] print_report+0xcc/0x620 [ 35.225897] ? __virt_addr_valid+0x102/0x340 [ 35.226444] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.227051] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.227664] kasan_report+0xbe/0xf0 [ 35.228136] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.228747] vma_interval_tree_remove+0xc75/0xec0 [ 35.229348] vma_prepare+0xc54/0x11a0 [ 35.229829] __split_vma+0x5af/0x950 [ 35.230294] ? __pfx___split_vma+0x10/0x10 [ 35.230819] ? find_held_lock+0x2c/0x110 [ 35.231334] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.231888] ? lock_is_held_type+0x9f/0x120 [ 35.232422] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.233018] ? mtree_range_walk+0x632/0x900 [ 35.233588] ? mas_walk+0x5c7/0x7c0 [ 35.234062] do_vmi_munmap+0x1f1/0x2b0 [ 35.234550] mmap_region+0x1f9/0x2660 [ 35.235026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.235537] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.236249] ? __pfx_lock_acquire+0x10/0x10 [ 35.236782] ? __pfx_mmap_region+0x10/0x10 [ 35.237309] ? security_mmap_addr+0x7d/0xa0 [ 35.237835] ? get_unmapped_area+0x1f5/0x3f0 [ 35.238383] do_mmap+0x854/0xf00 [ 35.238815] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.239308] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.239862] ksys_mmap_pgoff+0x3af/0x500 [ 35.240362] do_syscall_64+0x3f/0x90 [ 35.240840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.241502] RIP: 0033:0x7fb4048f1d82 [ 35.241953] 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 [ 35.244043] RSP: 002b:00007fff8580ab08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.244937] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4048f1d82 [ 35.245778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb403d2b000 [ 35.246611] RBP: 00007fb403d2b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.247445] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619431ccd90 [ 35.248276] R13: 00007fff8580ab20 R14: 00007fff8580ab50 R15: 00007fff8580aeb0 [ 35.249122] [ 35.249428] [ 35.249639] Allocated by task 212: [ 35.250064] kasan_save_stack+0x22/0x50 [ 35.250569] kasan_set_track+0x25/0x30 [ 35.251054] __kasan_slab_alloc+0x59/0x70 [ 35.251572] kmem_cache_alloc+0x16b/0x370 [ 35.252087] vm_area_dup+0x20/0x160 [ 35.252536] __split_vma+0x170/0x950 [ 35.252998] split_vma+0xc6/0x110 [ 35.253450] mprotect_fixup+0x8d2/0xb30 [ 35.253946] do_mprotect_pkey+0x87e/0xd40 [ 35.254459] __x64_sys_mprotect+0x78/0xc0 [ 35.254975] do_syscall_64+0x3f/0x90 [ 35.255442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.256079] [ 35.256293] Freed by task 212: [ 35.256687] kasan_save_stack+0x22/0x50 [ 35.257186] kasan_set_track+0x25/0x30 [ 35.257685] kasan_save_free_info+0x2b/0x50 [ 35.258205] __kasan_slab_free+0x10a/0x190 [ 35.258730] kmem_cache_free+0x10d/0x4d0 [ 35.259233] rcu_core+0x8c8/0x2860 [ 35.259668] __do_softirq+0x1b7/0x7d4 [ 35.260145] [ 35.260357] Last potentially related work creation: [ 35.260933] kasan_save_stack+0x22/0x50 [ 35.261447] __kasan_record_aux_stack+0x8e/0xa0 [ 35.262009] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.262731] remove_vma+0x139/0x170 [ 35.263180] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.263736] do_vmi_munmap+0x1f1/0x2b0 [ 35.264217] __vm_munmap+0x138/0x3a0 [ 35.264676] __x64_sys_munmap+0x59/0x80 [ 35.265165] do_syscall_64+0x3f/0x90 [ 35.265650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.266285] [ 35.266499] The buggy address belongs to the object at ffff88800df859f8 [ 35.266499] which belongs to the cache vm_area_struct of size 168 [ 35.267940] The buggy address is located 88 bytes inside of [ 35.267940] freed 168-byte region [ffff88800df859f8, ffff88800df85aa0) [ 35.269340] [ 35.269554] The buggy address belongs to the physical page: [ 35.270200] page:000000003557c45b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf85 [ 35.271280] memcg:ffff88800e076901 [ 35.271704] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.272339] page_type: 0xffffffff() [ 35.272784] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b89c0 dead000000000008 [ 35.273714] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e076901 [ 35.274604] page dumped because: kasan: bad access detected [ 35.275257] [ 35.275469] Memory state around the buggy address: [ 35.276046] ffff88800df85900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.276889] ffff88800df85980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.277753] >ffff88800df85a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.278590] ^ [ 35.279282] ffff88800df85a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.280123] ffff88800df85b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.280959] ================================================================== [ 35.281876] Disabling lock debugging due to kernel taint [ 37.855251] BUG: Bad rss-counter state mm:0000000086c9cf42 type:MM_FILEPAGES val:33 [ 37.856412] BUG: Bad rss-counter state mm:0000000086c9cf42 type:MM_ANONPAGES val:22 [ 38.222905] BUG: Bad rss-counter state mm:000000009f219e99 type:MM_FILEPAGES val:33 [ 38.223925] BUG: Bad rss-counter state mm:000000009f219e99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27972' (ECDSA) to the list of known hosts. 2023/06/21 07:33:46 fuzzer started 2023/06/21 07:33:46 dialing manager at localhost:36067 2023/06/21 07:33:46 checking machine... 2023/06/21 07:33:46 checking revisions... [ 38.964080] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:33:46 testing simple program... [ 39.011741] cgroup: Unknown subsys name 'net' [ 39.064659] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:33:45 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=0000000000000000 RCX=0000000080000100 RDX=ffff888010218000 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800d33eb30 RIP=ffffffff814c0871 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 00007f6465917700 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=00007fefd193c650 CR3=000000000cad8000 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=2035343a33333a3730203132206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a323639343320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a33333a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f4454146280 CR3=000000000cb44000 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=1b550970f996b0bde848980ecaeee304 XMM02=2c67c8bc2e329bc3000000000011aad0 XMM03=fb795ef6d65770560000000000121820 XMM04=16864a9844a0362400000000000ae988 XMM05=dfcdbad4f1609c370000000000131398 XMM06=0226931ef16c74a40000000000130570 XMM07=e042d86d42eb936e0000000000121aa0 XMM08=2bbdcccbe7b8adfc000000000011ab30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000