syzkaller login: [ 38.720400] BUG: Bad rss-counter state mm:00000000ad8b67be type:MM_FILEPAGES val:33 [ 38.722036] BUG: Bad rss-counter state mm:00000000ad8b67be type:MM_ANONPAGES val:22 [ 38.883688] ================================================================== [ 38.884777] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.885917] Read of size 8 at addr ffff8880096d6880 by task sshd/220 [ 38.887004] [ 38.887268] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.888276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.889451] Call Trace: [ 38.889852] [ 38.890187] dump_stack_lvl+0x91/0xf0 [ 38.890778] print_report+0xcc/0x620 [ 38.891353] ? __virt_addr_valid+0x102/0x340 [ 38.892015] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.892751] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893492] kasan_report+0xbe/0xf0 [ 38.894053] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.894785] vma_interval_tree_remove+0xc75/0xec0 [ 38.895494] vma_prepare+0xc54/0x11a0 [ 38.896055] __split_vma+0x5af/0x950 [ 38.896617] ? __pfx___split_vma+0x10/0x10 [ 38.897240] ? find_held_lock+0x2c/0x110 [ 38.897891] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.898539] ? lock_is_held_type+0x9f/0x120 [ 38.899085] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.899701] ? mtree_range_walk+0x632/0x900 [ 38.900251] ? mas_walk+0x5c7/0x7c0 [ 38.900738] do_vmi_munmap+0x1f1/0x2b0 [ 38.901228] mmap_region+0x1f9/0x2660 [ 38.901730] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.902257] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.902998] ? __pfx_lock_acquire+0x10/0x10 [ 38.903563] ? __pfx_mmap_region+0x10/0x10 [ 38.904112] ? security_mmap_addr+0x7d/0xa0 [ 38.904663] ? get_unmapped_area+0x1f5/0x3f0 [ 38.905240] do_mmap+0x854/0xf00 [ 38.905709] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.906230] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.906815] ksys_mmap_pgoff+0x3af/0x500 [ 38.907354] do_syscall_64+0x3f/0x90 [ 38.907854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.908527] RIP: 0033:0x7f11851f9d82 [ 38.909010] 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 [ 38.911280] RSP: 002b:00007ffc5dea5f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.912226] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11851f9d82 [ 38.913111] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1184633000 [ 38.914016] RBP: 00007f1184633000 R08: 0000000000000009 R09: 0000000000001000 [ 38.914933] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df3311eec0 [ 38.915817] R13: 00007ffc5dea5f40 R14: 00007ffc5dea5f70 R15: 00007ffc5dea62d0 [ 38.916722] [ 38.917025] [ 38.917249] Allocated by task 213: [ 38.917720] kasan_save_stack+0x22/0x50 [ 38.918250] kasan_set_track+0x25/0x30 [ 38.918760] __kasan_slab_alloc+0x59/0x70 [ 38.919310] kmem_cache_alloc+0x16b/0x370 [ 38.919852] vm_area_dup+0x20/0x160 [ 38.920327] __split_vma+0x170/0x950 [ 38.920818] split_vma+0xc6/0x110 [ 38.921288] mprotect_fixup+0x8d2/0xb30 [ 38.921822] do_mprotect_pkey+0x87e/0xd40 [ 38.922369] __x64_sys_mprotect+0x78/0xc0 [ 38.922931] do_syscall_64+0x3f/0x90 [ 38.923432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924102] [ 38.924329] Freed by task 213: [ 38.924741] kasan_save_stack+0x22/0x50 [ 38.925276] kasan_set_track+0x25/0x30 [ 38.925794] kasan_save_free_info+0x2b/0x50 [ 38.926356] __kasan_slab_free+0x10a/0x190 [ 38.926914] kmem_cache_free+0x10d/0x4d0 [ 38.927442] rcu_core+0x8c8/0x2860 [ 38.927907] __do_softirq+0x1b7/0x7d4 [ 38.928409] [ 38.928636] Last potentially related work creation: [ 38.929270] kasan_save_stack+0x22/0x50 [ 38.929804] __kasan_record_aux_stack+0x8e/0xa0 [ 38.930406] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.931085] remove_vma+0x139/0x170 [ 38.931561] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.932145] do_vmi_munmap+0x1f1/0x2b0 [ 38.932655] __vm_munmap+0x138/0x3a0 [ 38.933146] __x64_sys_munmap+0x59/0x80 [ 38.933681] do_syscall_64+0x3f/0x90 [ 38.934179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934853] [ 38.935078] The buggy address belongs to the object at ffff8880096d6828 [ 38.935078] which belongs to the cache vm_area_struct of size 168 [ 38.936619] The buggy address is located 88 bytes inside of [ 38.936619] freed 168-byte region [ffff8880096d6828, ffff8880096d68d0) [ 38.938103] [ 38.938331] The buggy address belongs to the physical page: [ 38.939026] page:00000000fcc7569e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96d6 [ 38.940164] memcg:ffff888009997701 [ 38.940616] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.941371] page_type: 0xffffffff() [ 38.941847] raw: 0100000000000200 ffff8880087a0c80 ffffea000025d8c0 dead000000000003 [ 38.942819] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009997701 [ 38.943777] page dumped because: kasan: bad access detected [ 38.944483] [ 38.944707] Memory state around the buggy address: [ 38.945323] ffff8880096d6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.946224] ffff8880096d6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.947133] >ffff8880096d6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.948041] ^ [ 38.948479] ffff8880096d6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.949399] ffff8880096d6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.950297] ================================================================== [ 38.951356] Disabling lock debugging due to kernel taint [ 40.874677] BUG: Bad rss-counter state mm:00000000703cc2a8 type:MM_FILEPAGES val:33 [ 40.875375] BUG: Bad rss-counter state mm:00000000703cc2a8 type:MM_ANONPAGES val:22 [ 41.408152] BUG: Bad rss-counter state mm:00000000af17c5ed type:MM_FILEPAGES val:33 [ 41.409130] BUG: Bad rss-counter state mm:00000000af17c5ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7051' (ECDSA) to the list of known hosts. 2023/06/20 16:05:14 fuzzer started 2023/06/20 16:05:15 dialing manager at localhost:36067 2023/06/20 16:05:15 checking machine... 2023/06/20 16:05:15 checking revisions... [ 42.070065] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:05:15 testing simple program... [ 42.109516] cgroup: Unknown subsys name 'net' [ 42.164808] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:05:14 Registers: info registers vcpu 0 RAX=ffffea0000393a00 RBX=ffff88800c6cac00 RCX=0000000000100000 RDX=0000000080100000 RSI=ffff88800c6cac00 RDI=ffff888008440780 RBP=ffff8880159b77f8 RSP=ffff8880159b7770 R8 =0000000000100000 R9 =ffffed1002b36edc R10=0000000000000003 R11=000000000010000f R12=ffff888008441c80 R13=ffff888008440780 R14=ffffea0000391a00 R15=0000000080100000 RIP=ffffffff81805d9c RFL=00000086 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007feeebc38900 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=00007feeeb0261d0 CR3=000000001434a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2a78c3b196e3e4e900000000000ae988 XMM05=0840036d856b780f0000000000133ac8 XMM06=4fda316b135da52b0000000000131e68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff888017f09b40 RSI=0000000000080000 RDI=0000000000000002 RBP=00000000158a9800 RSP=ffff8880194bfb68 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000080000 R14=0000000000000000 R15=ffff8880100e1780 RIP=ffffffff814c0370 RFL=00000213 [----A-C] 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 00007f98c356e900 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=00007fffaaa03000 CR3=00000000165ce000 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