syzkaller login: [ 30.679910] BUG: Bad rss-counter state mm:0000000011aeee7a type:MM_FILEPAGES val:33 [ 30.681124] BUG: Bad rss-counter state mm:0000000011aeee7a type:MM_ANONPAGES val:22 [ 30.845356] ================================================================== [ 30.846281] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.847243] Read of size 8 at addr ffff888016313c20 by task sshd/219 [ 30.848146] [ 30.848363] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.849241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.850271] Call Trace: [ 30.850606] [ 30.850893] dump_stack_lvl+0x91/0xf0 [ 30.851396] print_report+0xcc/0x620 [ 30.851920] ? __virt_addr_valid+0x102/0x340 [ 30.852480] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.853103] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.853724] kasan_report+0xbe/0xf0 [ 30.854207] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854836] vma_interval_tree_remove+0xc75/0xec0 [ 30.855440] vma_prepare+0xc54/0x11a0 [ 30.855930] __split_vma+0x5af/0x950 [ 30.856401] ? __pfx___split_vma+0x10/0x10 [ 30.856937] ? find_held_lock+0x2c/0x110 [ 30.857464] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.858037] ? lock_is_held_type+0x9f/0x120 [ 30.858581] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.859204] ? mtree_range_walk+0x632/0x900 [ 30.859775] ? mas_walk+0x5c7/0x7c0 [ 30.860253] do_vmi_munmap+0x1f1/0x2b0 [ 30.860741] mmap_region+0x1f9/0x2660 [ 30.861221] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.861742] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.862461] ? __pfx_lock_acquire+0x10/0x10 [ 30.863003] ? __pfx_mmap_region+0x10/0x10 [ 30.863541] ? security_mmap_addr+0x7d/0xa0 [ 30.864087] ? get_unmapped_area+0x1f5/0x3f0 [ 30.864643] do_mmap+0x854/0xf00 [ 30.865083] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.865575] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.866138] ksys_mmap_pgoff+0x3af/0x500 [ 30.866652] do_syscall_64+0x3f/0x90 [ 30.867135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867798] RIP: 0033:0x7f8391abdd82 [ 30.868260] 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 [ 30.870390] RSP: 002b:00007ffe68ba8f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.871296] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8391abdd82 [ 30.872162] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8390ef7000 [ 30.873005] RBP: 00007f8390ef7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.873863] R10: 0000000000000812 R11: 0000000000000206 R12: 000055abbeac7f60 [ 30.874714] R13: 00007ffe68ba8fb0 R14: 00007ffe68ba8fe0 R15: 00007ffe68ba9340 [ 30.875563] [ 30.875870] [ 30.876089] Allocated by task 212: [ 30.876528] kasan_save_stack+0x22/0x50 [ 30.877031] kasan_set_track+0x25/0x30 [ 30.877528] __kasan_slab_alloc+0x59/0x70 [ 30.878047] kmem_cache_alloc+0x16b/0x370 [ 30.878570] vm_area_dup+0x20/0x160 [ 30.879028] __split_vma+0x170/0x950 [ 30.879503] split_vma+0xc6/0x110 [ 30.879963] mprotect_fixup+0x8d2/0xb30 [ 30.880464] do_mprotect_pkey+0x87e/0xd40 [ 30.880987] __x64_sys_mprotect+0x78/0xc0 [ 30.881519] do_syscall_64+0x3f/0x90 [ 30.882000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882645] [ 30.882862] Freed by task 212: [ 30.883262] kasan_save_stack+0x22/0x50 [ 30.883790] kasan_set_track+0x25/0x30 [ 30.884289] kasan_save_free_info+0x2b/0x50 [ 30.884832] __kasan_slab_free+0x10a/0x190 [ 30.885379] kmem_cache_free+0x10d/0x4d0 [ 30.885895] rcu_core+0x8c8/0x2860 [ 30.886348] __do_softirq+0x1b7/0x7d4 [ 30.886829] [ 30.887049] Last potentially related work creation: [ 30.887648] kasan_save_stack+0x22/0x50 [ 30.888174] __kasan_record_aux_stack+0x8e/0xa0 [ 30.888767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.889413] remove_vma+0x139/0x170 [ 30.889877] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.890457] do_vmi_munmap+0x1f1/0x2b0 [ 30.890956] __vm_munmap+0x138/0x3a0 [ 30.891426] __x64_sys_munmap+0x59/0x80 [ 30.891938] do_syscall_64+0x3f/0x90 [ 30.892424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893077] [ 30.893294] The buggy address belongs to the object at ffff888016313bc8 [ 30.893294] which belongs to the cache vm_area_struct of size 168 [ 30.894769] The buggy address is located 88 bytes inside of [ 30.894769] freed 168-byte region [ffff888016313bc8, ffff888016313c70) [ 30.896173] [ 30.896387] The buggy address belongs to the physical page: [ 30.897051] page:00000000a2819502 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16313 [ 30.898142] memcg:ffff88800dead601 [ 30.898568] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.899212] page_type: 0xffffffff() [ 30.899683] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.900613] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dead601 [ 30.901528] page dumped because: kasan: bad access detected [ 30.902185] [ 30.902399] Memory state around the buggy address: [ 30.902976] ffff888016313b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.903838] ffff888016313b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.904692] >ffff888016313c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.905550] ^ [ 30.906079] ffff888016313c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.906926] ffff888016313d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.907796] ================================================================== [ 30.908819] Disabling lock debugging due to kernel taint [ 32.887195] BUG: Bad rss-counter state mm:00000000d36f096f type:MM_FILEPAGES val:33 [ 32.888443] BUG: Bad rss-counter state mm:00000000d36f096f type:MM_ANONPAGES val:22 [ 33.288673] BUG: Bad rss-counter state mm:000000003d47e8a9 type:MM_FILEPAGES val:33 [ 33.289782] BUG: Bad rss-counter state mm:000000003d47e8a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24717' (ECDSA) to the list of known hosts. 2023/06/20 20:06:00 fuzzer started 2023/06/20 20:06:00 dialing manager at localhost:36067 2023/06/20 20:06:00 checking machine... 2023/06/20 20:06:00 checking revisions... [ 34.054919] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:06:00 testing simple program... [ 34.102450] cgroup: Unknown subsys name 'net' [ 34.154957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:05:59 Registers: info registers vcpu 0 RAX=ffffffff86098092 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffff8880163c77f8 RSP=ffff8880163c76e0 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff8880163c7800 R13=ffff8880163c77e8 R14=ffff8880163c77e1 R15=ffff8880163c77a0 RIP=ffffffff81130c4e RFL=00000282 [--S----] 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 00007fc83a15c900 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=00007fc83a711650 CR3=000000000f7a0000 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=ffff888008a8b9f8 RCX=ffffffff81c67307 RDX=ffff88800d138000 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000001 RSP=ffff8880144a76d0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff888018f652c0 R13=ffff8880166a8600 R14=ffff888016596fa8 R15=ffff888018f652e4 RIP=ffffffff814c0864 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f00d9ec7900 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=00007f00d932cb90 CR3=000000000975a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c48f06ef561d56e700000000000ae988 XMM05=271f3fef274062d700000000001335a0 XMM06=806171799158d9670000000000132390 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000