syzkaller login: [ 31.027251] BUG: Bad rss-counter state mm:00000000229c3f06 type:MM_FILEPAGES val:33 [ 31.028741] BUG: Bad rss-counter state mm:00000000229c3f06 type:MM_ANONPAGES val:22 [ 31.179345] ================================================================== [ 31.180259] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.181223] Read of size 8 at addr ffff888018f3a5c8 by task sshd/220 [ 31.181996] [ 31.182295] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.183185] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.184173] Call Trace: [ 31.184507] [ 31.184808] dump_stack_lvl+0x91/0xf0 [ 31.185302] print_report+0xcc/0x620 [ 31.185796] ? __virt_addr_valid+0x102/0x340 [ 31.186350] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.186972] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187587] kasan_report+0xbe/0xf0 [ 31.188072] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.188753] vma_interval_tree_remove+0xc75/0xec0 [ 31.189371] vma_prepare+0xc54/0x11a0 [ 31.189860] __split_vma+0x5af/0x950 [ 31.190344] ? __pfx___split_vma+0x10/0x10 [ 31.190892] ? find_held_lock+0x2c/0x110 [ 31.191430] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.192015] ? lock_is_held_type+0x9f/0x120 [ 31.192575] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.193215] ? mtree_range_walk+0x632/0x900 [ 31.193784] ? mas_walk+0x5c7/0x7c0 [ 31.194277] do_vmi_munmap+0x1f1/0x2b0 [ 31.194790] mmap_region+0x1f9/0x2660 [ 31.195290] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.195821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.196569] ? __pfx_lock_acquire+0x10/0x10 [ 31.197126] ? __pfx_mmap_region+0x10/0x10 [ 31.197678] ? security_mmap_addr+0x7d/0xa0 [ 31.198224] ? get_unmapped_area+0x1f5/0x3f0 [ 31.198798] do_mmap+0x854/0xf00 [ 31.199254] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.199781] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.200363] ksys_mmap_pgoff+0x3af/0x500 [ 31.200907] do_syscall_64+0x3f/0x90 [ 31.201404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.202074] RIP: 0033:0x7f84dd455d82 [ 31.202548] 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 [ 31.204786] RSP: 002b:00007ffe6c92a6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.205730] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84dd455d82 [ 31.206614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84dc88f000 [ 31.207495] RBP: 00007f84dc88f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.208376] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da0b37fec0 [ 31.209270] R13: 00007ffe6c92a710 R14: 00007ffe6c92a740 R15: 00007ffe6c92aaa0 [ 31.210170] [ 31.210473] [ 31.210695] Allocated by task 213: [ 31.211134] kasan_save_stack+0x22/0x50 [ 31.211662] kasan_set_track+0x25/0x30 [ 31.212172] __kasan_slab_alloc+0x59/0x70 [ 31.212728] kmem_cache_alloc+0x16b/0x370 [ 31.213268] vm_area_dup+0x20/0x160 [ 31.213743] __split_vma+0x170/0x950 [ 31.214228] split_vma+0xc6/0x110 [ 31.214681] mprotect_fixup+0x8d2/0xb30 [ 31.215200] do_mprotect_pkey+0x87e/0xd40 [ 31.215748] __x64_sys_mprotect+0x78/0xc0 [ 31.216289] do_syscall_64+0x3f/0x90 [ 31.216796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.217463] [ 31.217688] Freed by task 213: [ 31.218093] kasan_save_stack+0x22/0x50 [ 31.218622] kasan_set_track+0x25/0x30 [ 31.219138] kasan_save_free_info+0x2b/0x50 [ 31.219687] __kasan_slab_free+0x10a/0x190 [ 31.220240] kmem_cache_free+0x10d/0x4d0 [ 31.220794] rcu_core+0x8c8/0x2860 [ 31.221251] __do_softirq+0x1b7/0x7d4 [ 31.221750] [ 31.221969] Last potentially related work creation: [ 31.222570] kasan_save_stack+0x22/0x50 [ 31.223099] __kasan_record_aux_stack+0x8e/0xa0 [ 31.223701] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.224360] remove_vma+0x139/0x170 [ 31.224840] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.225422] do_vmi_munmap+0x1f1/0x2b0 [ 31.225927] __vm_munmap+0x138/0x3a0 [ 31.226414] __x64_sys_munmap+0x59/0x80 [ 31.226929] do_syscall_64+0x3f/0x90 [ 31.227421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.228091] [ 31.228311] The buggy address belongs to the object at ffff888018f3a570 [ 31.228311] which belongs to the cache vm_area_struct of size 168 [ 31.229860] The buggy address is located 88 bytes inside of [ 31.229860] freed 168-byte region [ffff888018f3a570, ffff888018f3a618) [ 31.231309] [ 31.231534] The buggy address belongs to the physical page: [ 31.232208] page:00000000809bf20b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f3a [ 31.233361] memcg:ffff88800dc43f01 [ 31.233809] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.234482] page_type: 0xffffffff() [ 31.234957] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.235913] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc43f01 [ 31.236880] page dumped because: kasan: bad access detected [ 31.237564] [ 31.237790] Memory state around the buggy address: [ 31.238395] ffff888018f3a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.239286] ffff888018f3a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.240175] >ffff888018f3a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.241088] ^ [ 31.241782] ffff888018f3a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.242673] ffff888018f3a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.243563] ================================================================== [ 31.244555] Disabling lock debugging due to kernel taint [ 33.128521] BUG: Bad rss-counter state mm:00000000ae0fba52 type:MM_FILEPAGES val:33 [ 33.129262] BUG: Bad rss-counter state mm:00000000ae0fba52 type:MM_ANONPAGES val:22 [ 33.503919] BUG: Bad rss-counter state mm:00000000a5634588 type:MM_FILEPAGES val:33 [ 33.504569] BUG: Bad rss-counter state mm:00000000a5634588 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29333' (ECDSA) to the list of known hosts. 2023/06/19 11:38:29 fuzzer started 2023/06/19 11:38:30 dialing manager at localhost:44161 2023/06/19 11:38:30 checking machine... 2023/06/19 11:38:30 checking revisions... [ 34.163604] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:38:30 testing simple program... [ 34.215249] cgroup: Unknown subsys name 'net' [ 34.268057] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:38:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800885e7c0 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff8880102576e0 RBP=1ffff1100204aed8 RSP=ffff8880102576b8 R8 =0000000000000001 R9 =ffffed100204aedc R10=0000000000000003 R11=00000000000b6996 R12=ffff88800885e7c8 R13=ffff88800885e7d0 R14=0000000000000001 R15=ffff88800c56a274 RIP=ffffffff812e00f6 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 00007fa113851700 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=00007f0e4ba4a618 CR3=0000000019e06000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039323a3833 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343732 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f2c0a452c20 CR3=000000000f636000 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=3e19f8a053f690bc63492f264d668da6 XMM02=ec2efd57dc4c00df000000000011f9a8 XMM03=fbc8886bb1b128df000000000011fa78 XMM04=52e3c0fde1f52eae00000000000ae988 XMM05=19e9129bd510f2350000000000133c78 XMM06=7b5db5df6c12dbb00000000000132ae0 XMM07=e042d86d42eb936e0000000000124360 XMM08=fbc8886bb1b128df000000000011fa78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000