syzkaller login: [ 31.168458] BUG: Bad rss-counter state mm:00000000a7422b89 type:MM_FILEPAGES val:33 [ 31.169674] BUG: Bad rss-counter state mm:00000000a7422b89 type:MM_ANONPAGES val:22 [ 31.210400] ================================================================== [ 31.211582] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.212785] Read of size 8 at addr ffff8880196cc798 by task sshd/221 [ 31.213815] [ 31.214100] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.215397] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.216858] Call Trace: [ 31.217338] [ 31.217737] dump_stack_lvl+0x91/0xf0 [ 31.218421] print_report+0xcc/0x620 [ 31.219080] ? __virt_addr_valid+0x102/0x340 [ 31.219910] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.220869] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221748] kasan_report+0xbe/0xf0 [ 31.222382] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.223205] vma_interval_tree_remove+0xc75/0xec0 [ 31.223999] vma_prepare+0xc54/0x11a0 [ 31.224632] __split_vma+0x5af/0x950 [ 31.225272] ? __pfx___split_vma+0x10/0x10 [ 31.225994] ? find_held_lock+0x2c/0x110 [ 31.226696] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.227436] ? lock_is_held_type+0x9f/0x120 [ 31.228161] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.228963] ? mtree_range_walk+0x632/0x900 [ 31.229704] ? mas_walk+0x5c7/0x7c0 [ 31.230372] do_vmi_munmap+0x1f1/0x2b0 [ 31.231037] mmap_region+0x1f9/0x2660 [ 31.231671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.232346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.233294] ? __pfx_lock_acquire+0x10/0x10 [ 31.234032] ? __pfx_mmap_region+0x10/0x10 [ 31.234741] ? security_mmap_addr+0x7d/0xa0 [ 31.235461] ? get_unmapped_area+0x1f5/0x3f0 [ 31.236201] do_mmap+0x854/0xf00 [ 31.236770] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.237401] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.238167] ksys_mmap_pgoff+0x3af/0x500 [ 31.238851] do_syscall_64+0x3f/0x90 [ 31.239502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240371] RIP: 0033:0x7efd4f7a4d82 [ 31.241001] 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 [ 31.243813] RSP: 002b:00007ffff3ddb768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.245047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd4f7a4d82 [ 31.246173] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd4ebde000 [ 31.247302] RBP: 00007efd4ebde000 R08: 0000000000000009 R09: 0000000000001000 [ 31.248466] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c5be21ec0 [ 31.249624] R13: 00007ffff3ddb780 R14: 00007ffff3ddb7b0 R15: 00007ffff3ddbb10 [ 31.250819] [ 31.251216] [ 31.251504] Allocated by task 214: [ 31.252082] kasan_save_stack+0x22/0x50 [ 31.252736] kasan_set_track+0x25/0x30 [ 31.253389] __kasan_slab_alloc+0x59/0x70 [ 31.254100] kmem_cache_alloc+0x16b/0x370 [ 31.254785] vm_area_dup+0x20/0x160 [ 31.255391] __split_vma+0x170/0x950 [ 31.256014] split_vma+0xc6/0x110 [ 31.256611] mprotect_fixup+0x8d2/0xb30 [ 31.257288] do_mprotect_pkey+0x87e/0xd40 [ 31.258015] __x64_sys_mprotect+0x78/0xc0 [ 31.258718] do_syscall_64+0x3f/0x90 [ 31.259365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.260227] [ 31.260522] Freed by task 214: [ 31.261044] kasan_save_stack+0x22/0x50 [ 31.261734] kasan_set_track+0x25/0x30 [ 31.262405] kasan_save_free_info+0x2b/0x50 [ 31.263118] __kasan_slab_free+0x10a/0x190 [ 31.263831] kmem_cache_free+0x10d/0x4d0 [ 31.264514] rcu_core+0x8c8/0x2860 [ 31.265113] __do_softirq+0x1b7/0x7d4 [ 31.265787] [ 31.266081] Last potentially related work creation: [ 31.266876] kasan_save_stack+0x22/0x50 [ 31.267552] __kasan_record_aux_stack+0x8e/0xa0 [ 31.268331] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.269196] remove_vma+0x139/0x170 [ 31.269761] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.270326] do_vmi_munmap+0x1f1/0x2b0 [ 31.270812] __vm_munmap+0x138/0x3a0 [ 31.271281] __x64_sys_munmap+0x59/0x80 [ 31.271779] do_syscall_64+0x3f/0x90 [ 31.272252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272893] [ 31.273110] The buggy address belongs to the object at ffff8880196cc740 [ 31.273110] which belongs to the cache vm_area_struct of size 168 [ 31.274584] The buggy address is located 88 bytes inside of [ 31.274584] freed 168-byte region [ffff8880196cc740, ffff8880196cc7e8) [ 31.275987] [ 31.276200] The buggy address belongs to the physical page: [ 31.276865] page:0000000051edba4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196cc [ 31.277979] memcg:ffff8880194b0401 [ 31.278406] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.279061] page_type: 0xffffffff() [ 31.279515] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.280437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880194b0401 [ 31.281344] page dumped because: kasan: bad access detected [ 31.282020] [ 31.282235] Memory state around the buggy address: [ 31.282846] ffff8880196cc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.283700] ffff8880196cc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.284557] >ffff8880196cc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.285406] ^ [ 31.285925] ffff8880196cc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.286806] ffff8880196cc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.287659] ================================================================== [ 31.288575] Disabling lock debugging due to kernel taint [ 33.543627] BUG: Bad rss-counter state mm:0000000077b7224d type:MM_FILEPAGES val:33 [ 33.544629] BUG: Bad rss-counter state mm:0000000077b7224d type:MM_ANONPAGES val:22 [ 34.011866] BUG: Bad rss-counter state mm:000000003f619b8b type:MM_FILEPAGES val:33 [ 34.012876] BUG: Bad rss-counter state mm:000000003f619b8b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12798' (ECDSA) to the list of known hosts. 2023/06/21 05:28:22 fuzzer started 2023/06/21 05:28:22 dialing manager at localhost:36067 2023/06/21 05:28:22 checking machine... 2023/06/21 05:28:22 checking revisions... [ 34.722970] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:28:23 testing simple program... [ 34.777067] cgroup: Unknown subsys name 'net' [ 34.829197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:28:22 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffcdf5963a8 CR3=0000000005482000 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=00007f0b3b71d5100000563ff7680790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88806cf09e70 RSI=ffff88806cf09e58 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e58 R15=ffff88806cf09a98 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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 00007f7281250900 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=00007ffc1e097000 CR3=0000000010350000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000