syzkaller login: [ 63.929815] BUG: Bad rss-counter state mm:0000000040964946 type:MM_FILEPAGES val:33 [ 63.930482] BUG: Bad rss-counter state mm:0000000040964946 type:MM_ANONPAGES val:22 [ 64.117350] ================================================================== [ 64.118081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.118716] Read of size 8 at addr ffff888016908b38 by task sshd/229 [ 64.119206] [ 64.120704] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 64.121246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.121996] Call Trace: [ 64.122441] [ 64.122742] dump_stack_lvl+0x91/0xf0 [ 64.123066] print_report+0xcc/0x620 [ 64.123387] ? __virt_addr_valid+0x102/0x340 [ 64.123752] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.124147] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.124548] kasan_report+0xbe/0xf0 [ 64.124854] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.125249] vma_interval_tree_remove+0xc75/0xec0 [ 64.125751] vma_prepare+0xc54/0x11a0 [ 64.126064] __split_vma+0x5af/0x950 [ 64.126980] ? __pfx___split_vma+0x10/0x10 [ 64.127887] ? find_held_lock+0x2c/0x110 [ 64.128757] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.129791] ? lock_is_held_type+0x9f/0x120 [ 64.130801] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.132870] ? mtree_range_walk+0x632/0x900 [ 64.133800] ? mas_walk+0x5c7/0x7c0 [ 64.134371] do_vmi_munmap+0x1f1/0x2b0 [ 64.134717] mmap_region+0x1f9/0x2660 [ 64.135040] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.135382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.135891] ? __pfx_lock_acquire+0x10/0x10 [ 64.136242] ? __pfx_mmap_region+0x10/0x10 [ 64.136598] ? security_mmap_addr+0x7d/0xa0 [ 64.136938] ? get_unmapped_area+0x1f5/0x3f0 [ 64.137301] do_mmap+0x854/0xf00 [ 64.137603] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.137939] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.138330] ksys_mmap_pgoff+0x3af/0x500 [ 64.138672] do_syscall_64+0x3f/0x90 [ 64.138979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.139396] RIP: 0033:0x7f4e551d5d82 [ 64.139697] 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 [ 64.141065] RSP: 002b:00007ffff338bfd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.141639] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e551d5d82 [ 64.142234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e5460f000 [ 64.142816] RBP: 00007f4e5460f000 R08: 0000000000000009 R09: 0000000000001000 [ 64.143356] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c1acaaec0 [ 64.143941] R13: 00007ffff338bff0 R14: 00007ffff338c020 R15: 00007ffff338c380 [ 64.144528] [ 64.144726] [ 64.144870] Allocated by task 220: [ 64.145148] kasan_save_stack+0x22/0x50 [ 64.145497] kasan_set_track+0x25/0x30 [ 64.145844] __kasan_slab_alloc+0x59/0x70 [ 64.146251] kmem_cache_alloc+0x16b/0x370 [ 64.147172] vm_area_dup+0x20/0x160 [ 64.148019] __split_vma+0x170/0x950 [ 64.148861] split_vma+0xc6/0x110 [ 64.149657] mprotect_fixup+0x8d2/0xb30 [ 64.151081] do_mprotect_pkey+0x87e/0xd40 [ 64.152477] __x64_sys_mprotect+0x78/0xc0 [ 64.153450] do_syscall_64+0x3f/0x90 [ 64.154226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.154625] [ 64.154764] Freed by task 210: [ 64.155011] kasan_save_stack+0x22/0x50 [ 64.155334] kasan_set_track+0x25/0x30 [ 64.155656] kasan_save_free_info+0x2b/0x50 [ 64.156004] __kasan_slab_free+0x10a/0x190 [ 64.156349] kmem_cache_free+0x10d/0x4d0 [ 64.156675] rcu_core+0x8c8/0x2860 [ 64.156964] __do_softirq+0x1b7/0x7d4 [ 64.157267] [ 64.157406] Last potentially related work creation: [ 64.157782] kasan_save_stack+0x22/0x50 [ 64.158104] __kasan_record_aux_stack+0x8e/0xa0 [ 64.159236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.160398] remove_vma+0x139/0x170 [ 64.161226] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.162211] do_vmi_munmap+0x1f1/0x2b0 [ 64.163148] __vm_munmap+0x138/0x3a0 [ 64.163975] __x64_sys_munmap+0x59/0x80 [ 64.164872] do_syscall_64+0x3f/0x90 [ 64.165707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.166904] [ 64.167267] The buggy address belongs to the object at ffff888016908ae0 [ 64.167267] which belongs to the cache vm_area_struct of size 168 [ 64.170074] The buggy address is located 88 bytes inside of [ 64.170074] freed 168-byte region [ffff888016908ae0, ffff888016908b88) [ 64.172710] [ 64.173062] The buggy address belongs to the physical page: [ 64.174278] page:0000000002e64e72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16908 [ 64.176612] memcg:ffff88800fcab601 [ 64.178374] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.178787] page_type: 0xffffffff() [ 64.179072] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 64.179664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcab601 [ 64.180237] page dumped because: kasan: bad access detected [ 64.180654] [ 64.180792] Memory state around the buggy address: [ 64.181154] ffff888016908a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.181687] ffff888016908a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 64.182233] >ffff888016908b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.182782] ^ [ 64.183166] ffff888016908b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 64.183697] ffff888016908c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 64.184232] ================================================================== [ 64.185014] Disabling lock debugging due to kernel taint [ 67.098368] BUG: Bad rss-counter state mm:00000000b495b073 type:MM_FILEPAGES val:33 [ 67.099008] BUG: Bad rss-counter state mm:00000000b495b073 type:MM_ANONPAGES val:22 [ 68.387807] BUG: Bad rss-counter state mm:000000004bf44a89 type:MM_FILEPAGES val:33 [ 68.388461] BUG: Bad rss-counter state mm:000000004bf44a89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19635' (ECDSA) to the list of known hosts. 2023/06/21 09:56:36 fuzzer started 2023/06/21 09:56:36 dialing manager at localhost:36067 2023/06/21 09:56:36 checking machine... 2023/06/21 09:56:36 checking revisions... [ 69.310443] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:56:36 testing simple program... [ 69.367897] cgroup: Unknown subsys name 'net' [ 69.444332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:56:35 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=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f52d90c2328 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f2dc9a5d0e8 CR3=000000000ef2e000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=abb10e29cc404d260000000000134dd0 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=e85b5bde7e880eb300000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000