syzkaller login: [ 33.953129] BUG: Bad rss-counter state mm:00000000be056ed8 type:MM_FILEPAGES val:33 [ 33.953974] BUG: Bad rss-counter state mm:00000000be056ed8 type:MM_ANONPAGES val:22 [ 34.108751] ================================================================== [ 34.109816] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.110842] Read of size 8 at addr ffff88800c66c4e0 by task sshd/220 [ 34.111734] [ 34.112070] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.112884] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.113801] Call Trace: [ 34.114142] [ 34.114414] dump_stack_lvl+0x91/0xf0 [ 34.114880] print_report+0xcc/0x620 [ 34.115344] ? __virt_addr_valid+0x102/0x340 [ 34.115865] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.116453] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.117035] kasan_report+0xbe/0xf0 [ 34.117498] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.118124] vma_interval_tree_remove+0xc75/0xec0 [ 34.118730] vma_prepare+0xc54/0x11a0 [ 34.119200] __split_vma+0x5af/0x950 [ 34.119667] ? __pfx___split_vma+0x10/0x10 [ 34.120189] ? find_held_lock+0x2c/0x110 [ 34.120707] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.121263] ? lock_is_held_type+0x9f/0x120 [ 34.121803] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.122422] ? mtree_range_walk+0x632/0x900 [ 34.122973] ? mas_walk+0x5c7/0x7c0 [ 34.123449] do_vmi_munmap+0x1f1/0x2b0 [ 34.123938] mmap_region+0x1f9/0x2660 [ 34.124419] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.124941] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.125655] ? __pfx_lock_acquire+0x10/0x10 [ 34.126193] ? __pfx_mmap_region+0x10/0x10 [ 34.126721] ? security_mmap_addr+0x7d/0xa0 [ 34.127249] ? get_unmapped_area+0x1f5/0x3f0 [ 34.127794] do_mmap+0x854/0xf00 [ 34.128223] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.128712] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.129265] ksys_mmap_pgoff+0x3af/0x500 [ 34.129770] do_syscall_64+0x3f/0x90 [ 34.130263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.130910] RIP: 0033:0x7fd124b58d82 [ 34.131360] 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 [ 34.133471] RSP: 002b:00007fffe64b04e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.134365] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd124b58d82 [ 34.135203] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd123f92000 [ 34.136063] RBP: 00007fd123f92000 R08: 0000000000000009 R09: 0000000000001000 [ 34.136902] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b09d30ec0 [ 34.137747] R13: 00007fffe64b0500 R14: 00007fffe64b0530 R15: 00007fffe64b0890 [ 34.138616] [ 34.138902] [ 34.139112] Allocated by task 212: [ 34.139532] kasan_save_stack+0x22/0x50 [ 34.140040] kasan_set_track+0x25/0x30 [ 34.140534] __kasan_slab_alloc+0x59/0x70 [ 34.141052] kmem_cache_alloc+0x16b/0x370 [ 34.141572] vm_area_dup+0x20/0x160 [ 34.142039] __split_vma+0x170/0x950 [ 34.142497] split_vma+0xc6/0x110 [ 34.142925] mprotect_fixup+0x8d2/0xb30 [ 34.143430] do_mprotect_pkey+0x87e/0xd40 [ 34.143940] __x64_sys_mprotect+0x78/0xc0 [ 34.144454] do_syscall_64+0x3f/0x90 [ 34.144926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.145551] [ 34.145761] Freed by task 212: [ 34.146153] kasan_save_stack+0x22/0x50 [ 34.146643] kasan_set_track+0x25/0x30 [ 34.147124] kasan_save_free_info+0x2b/0x50 [ 34.147654] __kasan_slab_free+0x10a/0x190 [ 34.148182] kmem_cache_free+0x10d/0x4d0 [ 34.148694] rcu_core+0x8c8/0x2860 [ 34.149138] __do_softirq+0x1b7/0x7d4 [ 34.149608] [ 34.149816] Last potentially related work creation: [ 34.150403] kasan_save_stack+0x22/0x50 [ 34.150899] __kasan_record_aux_stack+0x8e/0xa0 [ 34.151465] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.152101] remove_vma+0x139/0x170 [ 34.152543] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.153183] do_vmi_munmap+0x1f1/0x2b0 [ 34.153662] __vm_munmap+0x138/0x3a0 [ 34.154139] __x64_sys_munmap+0x59/0x80 [ 34.154632] do_syscall_64+0x3f/0x90 [ 34.155097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.155742] [ 34.155961] Second to last potentially related work creation: [ 34.156642] kasan_save_stack+0x22/0x50 [ 34.157143] __kasan_record_aux_stack+0x8e/0xa0 [ 34.157722] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.158372] remove_vma+0x139/0x170 [ 34.158821] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.159370] do_vmi_munmap+0x1f1/0x2b0 [ 34.159849] mmap_region+0x1f9/0x2660 [ 34.160321] do_mmap+0x854/0xf00 [ 34.160746] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.161226] ksys_mmap_pgoff+0x3af/0x500 [ 34.161721] do_syscall_64+0x3f/0x90 [ 34.162206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.162840] [ 34.163050] The buggy address belongs to the object at ffff88800c66c488 [ 34.163050] which belongs to the cache vm_area_struct of size 168 [ 34.164493] The buggy address is located 88 bytes inside of [ 34.164493] freed 168-byte region [ffff88800c66c488, ffff88800c66c530) [ 34.165884] [ 34.166105] The buggy address belongs to the physical page: [ 34.166747] page:000000000b2157b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc66c [ 34.167837] memcg:ffff88800c66db01 [ 34.168254] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.168962] page_type: 0xffffffff() [ 34.169405] raw: 0100000000000200 ffff88800879fc80 ffffea0000381c80 dead000000000003 [ 34.170324] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c66db01 [ 34.171222] page dumped because: kasan: bad access detected [ 34.171880] [ 34.172095] Memory state around the buggy address: [ 34.172668] ffff88800c66c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.173506] ffff88800c66c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 34.174367] >ffff88800c66c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.175192] ^ [ 34.175933] ffff88800c66c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 34.176809] ffff88800c66c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.177654] ================================================================== [ 34.178654] Disabling lock debugging due to kernel taint [ 35.887045] BUG: Bad rss-counter state mm:0000000046565056 type:MM_FILEPAGES val:33 [ 35.888306] BUG: Bad rss-counter state mm:0000000046565056 type:MM_ANONPAGES val:22 [ 36.298338] BUG: Bad rss-counter state mm:00000000a8774567 type:MM_FILEPAGES val:33 [ 36.300101] BUG: Bad rss-counter state mm:00000000a8774567 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56950' (ECDSA) to the list of known hosts. 2023/06/19 18:09:25 fuzzer started 2023/06/19 18:09:26 dialing manager at localhost:44161 2023/06/19 18:09:26 checking machine... 2023/06/19 18:09:26 checking revisions... [ 37.051669] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:09:26 testing simple program... [ 37.100364] cgroup: Unknown subsys name 'net' [ 37.148882] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:09:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800d7d5068 RCX=1ffff11001b10a86 RDX=dffffc0000000000 RSI=ffff888013e36be0 RDI=ffff88800d7d5098 RBP=ffff88800d7d5078 RSP=ffff888015f77678 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888013e36b80 R13=0000000000000000 R14=ffff88800ea1b3d8 R15=ffff88800ea1b390 RIP=ffffffff8184755b RFL=00000046 [---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 00007f529ab468c0 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=00007fb0bb4d6060 CR3=000000000e2ea000 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=00000000000000000000000000000000 XMM02=616c756765723a6d726f6674616c702b XMM03=00302e79726f74616c756765723a6d72 XMM04=2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f XMM05=00000006000000050000557e41a2f260 XMM06=0000557e41a289d00000000300000000 XMM07=00000000000000000000000000000000 XMM08=74616c756765723a6d726f6674616c70 XMM09=00000000000000000000000000000000 XMM10=00000020000000000000002000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1001ac80a9 RBX=0000000000000148 RCX=0000000000000000 RDX=0000000000000dc0 RSI=ffff88800d640400 RDI=0000000000000200 RBP=ffff888008441c80 RSP=ffff88801ca4fe60 R8 =0000000000000007 R9 =0000000000000001 R10=ffffed1001ac80a9 R11=00000000000b6996 R12=ffff88800d640400 R13=0000000000000dc0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180f3eb RFL=00000202 [-------] 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 00007fcd428af900 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=00007fcd4286301c CR3=000000000e7b0000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000