syzkaller login: [ 31.123590] BUG: Bad rss-counter state mm:00000000dfe9c60d type:MM_FILEPAGES val:33 [ 31.124822] BUG: Bad rss-counter state mm:00000000dfe9c60d type:MM_ANONPAGES val:22 [ 31.227669] ================================================================== [ 31.228626] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.229623] Read of size 8 at addr ffff888018c8ab38 by task sshd/219 [ 31.230583] [ 31.230819] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.231716] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.232755] Call Trace: [ 31.233091] [ 31.233391] dump_stack_lvl+0x91/0xf0 [ 31.233913] print_report+0xcc/0x620 [ 31.234418] ? __virt_addr_valid+0x102/0x340 [ 31.235014] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.235664] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.236311] kasan_report+0xbe/0xf0 [ 31.236817] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.237503] vma_interval_tree_remove+0xc75/0xec0 [ 31.238166] vma_prepare+0xc54/0x11a0 [ 31.238711] __split_vma+0x5af/0x950 [ 31.239229] ? __pfx___split_vma+0x10/0x10 [ 31.239795] ? find_held_lock+0x2c/0x110 [ 31.240360] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.240982] ? lock_is_held_type+0x9f/0x120 [ 31.241572] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.242230] ? mtree_range_walk+0x632/0x900 [ 31.242847] ? mas_walk+0x5c7/0x7c0 [ 31.243367] do_vmi_munmap+0x1f1/0x2b0 [ 31.243903] mmap_region+0x1f9/0x2660 [ 31.244428] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.244989] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.245774] ? __pfx_lock_acquire+0x10/0x10 [ 31.246365] ? __pfx_mmap_region+0x10/0x10 [ 31.246958] ? security_mmap_addr+0x7d/0xa0 [ 31.247530] ? get_unmapped_area+0x1f5/0x3f0 [ 31.248141] do_mmap+0x854/0xf00 [ 31.248625] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.249168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.249786] ksys_mmap_pgoff+0x3af/0x500 [ 31.250341] do_syscall_64+0x3f/0x90 [ 31.250872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.251573] RIP: 0033:0x7faa608b0d82 [ 31.252077] 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 [ 31.254389] RSP: 002b:00007ffe5e06eee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.255390] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa608b0d82 [ 31.256309] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa5fcea000 [ 31.257234] RBP: 00007faa5fcea000 R08: 0000000000000009 R09: 0000000000001000 [ 31.258160] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d68468f70 [ 31.259103] R13: 00007ffe5e06ef00 R14: 00007ffe5e06ef30 R15: 00007ffe5e06f290 [ 31.260035] [ 31.260357] [ 31.260589] Allocated by task 212: [ 31.261056] kasan_save_stack+0x22/0x50 [ 31.261600] kasan_set_track+0x25/0x30 [ 31.262141] __kasan_slab_alloc+0x59/0x70 [ 31.262719] kmem_cache_alloc+0x16b/0x370 [ 31.263286] vm_area_dup+0x20/0x160 [ 31.263775] __split_vma+0x170/0x950 [ 31.264283] split_vma+0xc6/0x110 [ 31.264762] mprotect_fixup+0x8d2/0xb30 [ 31.265308] do_mprotect_pkey+0x87e/0xd40 [ 31.265879] __x64_sys_mprotect+0x78/0xc0 [ 31.266446] do_syscall_64+0x3f/0x90 [ 31.266993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.267691] [ 31.267924] Freed by task 212: [ 31.268350] kasan_save_stack+0x22/0x50 [ 31.268902] kasan_set_track+0x25/0x30 [ 31.269438] kasan_save_free_info+0x2b/0x50 [ 31.270017] __kasan_slab_free+0x10a/0x190 [ 31.270598] kmem_cache_free+0x10d/0x4d0 [ 31.271152] rcu_core+0x8c8/0x2860 [ 31.271770] __do_softirq+0x1b7/0x7d4 [ 31.272293] [ 31.272525] Last potentially related work creation: [ 31.273173] kasan_save_stack+0x22/0x50 [ 31.273722] __kasan_record_aux_stack+0x8e/0xa0 [ 31.274351] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.275073] remove_vma+0x139/0x170 [ 31.275560] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.276167] do_vmi_munmap+0x1f1/0x2b0 [ 31.276698] __vm_munmap+0x138/0x3a0 [ 31.277209] __x64_sys_munmap+0x59/0x80 [ 31.277751] do_syscall_64+0x3f/0x90 [ 31.278272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.278990] [ 31.279221] The buggy address belongs to the object at ffff888018c8aae0 [ 31.279221] which belongs to the cache vm_area_struct of size 168 [ 31.280813] The buggy address is located 88 bytes inside of [ 31.280813] freed 168-byte region [ffff888018c8aae0, ffff888018c8ab88) [ 31.282352] [ 31.282594] The buggy address belongs to the physical page: [ 31.283311] page:000000002dbe4734 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c8a [ 31.284488] memcg:ffff88800ec88901 [ 31.284954] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.285656] page_type: 0xffffffff() [ 31.286154] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.287180] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec88901 [ 31.288168] page dumped because: kasan: bad access detected [ 31.288893] [ 31.289127] Memory state around the buggy address: [ 31.289756] ffff888018c8aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.290695] ffff888018c8aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.291619] >ffff888018c8ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.292550] ^ [ 31.293223] ffff888018c8ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.294178] ffff888018c8ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.295139] ================================================================== [ 31.296154] Disabling lock debugging due to kernel taint [ 34.070161] BUG: Bad rss-counter state mm:00000000c8379733 type:MM_FILEPAGES val:33 [ 34.071381] BUG: Bad rss-counter state mm:00000000c8379733 type:MM_ANONPAGES val:22 [ 34.498815] BUG: Bad rss-counter state mm:00000000da1f8335 type:MM_FILEPAGES val:33 [ 34.499887] BUG: Bad rss-counter state mm:00000000da1f8335 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29790' (ECDSA) to the list of known hosts. 2023/06/21 09:33:59 fuzzer started 2023/06/21 09:33:59 dialing manager at localhost:36067 2023/06/21 09:33:59 checking machine... 2023/06/21 09:33:59 checking revisions... [ 35.312030] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:33:59 testing simple program... [ 35.359499] cgroup: Unknown subsys name 'net' [ 35.397056] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:33:59 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81828543 RSP=ffff888008d9fc40 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000200 R13=ffffffff87b6a200 R14=0000000000000001 R15=ffff888016694000 RIP=ffffffff815343fe RFL=00000047 [---Z-PC] 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 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=0000563d6d7c1f78 CR3=000000001beb4000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888013558000 RSI=ffffffff81ef71c7 RDI=ffff888008cce2e0 RBP=0000000000000001 RSP=ffff88801436f860 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888008cce2d8 R13=0000000000000008 R14=0000000000000005 R15=0000000000000008 RIP=ffffffff81ef71e9 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 00007f61afb75900 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=00007f61aef7b930 CR3=000000000c658000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2f19d7860e14babf00000000000ae988 XMM05=b89aa4b9131596c10000000000132b68 XMM06=806171799158d9670000000000131c08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000