syzkaller login: [ 30.709055] BUG: Bad rss-counter state mm:000000007462b5d3 type:MM_FILEPAGES val:33 [ 30.709950] BUG: Bad rss-counter state mm:000000007462b5d3 type:MM_ANONPAGES val:22 [ 30.854440] ================================================================== [ 30.855954] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.857645] Read of size 8 at addr ffff8880193a4c20 by task sshd/220 [ 30.858250] [ 30.858399] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.858954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.859923] Call Trace: [ 30.860138] [ 30.860324] dump_stack_lvl+0x91/0xf0 [ 30.860650] print_report+0xcc/0x620 [ 30.860967] ? __virt_addr_valid+0x102/0x340 [ 30.861329] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862207] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862910] kasan_report+0xbe/0xf0 [ 30.863810] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864941] vma_interval_tree_remove+0xc75/0xec0 [ 30.865987] vma_prepare+0xc54/0x11a0 [ 30.866857] __split_vma+0x5af/0x950 [ 30.867676] ? __pfx___split_vma+0x10/0x10 [ 30.868606] ? find_held_lock+0x2c/0x110 [ 30.869529] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.870539] ? lock_is_held_type+0x9f/0x120 [ 30.871487] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.872555] ? mtree_range_walk+0x632/0x900 [ 30.873521] ? mas_walk+0x5c7/0x7c0 [ 30.874332] do_vmi_munmap+0x1f1/0x2b0 [ 30.875396] mmap_region+0x1f9/0x2660 [ 30.876414] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.877444] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.878765] ? __pfx_lock_acquire+0x10/0x10 [ 30.879726] ? __pfx_mmap_region+0x10/0x10 [ 30.881455] ? security_mmap_addr+0x7d/0xa0 [ 30.882573] ? get_unmapped_area+0x1f5/0x3f0 [ 30.883706] do_mmap+0x854/0xf00 [ 30.884469] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.885315] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.886341] ksys_mmap_pgoff+0x3af/0x500 [ 30.887316] do_syscall_64+0x3f/0x90 [ 30.888301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889546] RIP: 0033:0x7fc711e75d82 [ 30.890373] 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 [ 30.894474] RSP: 002b:00007fff465d9128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.896155] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc711e75d82 [ 30.897808] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7112af000 [ 30.899715] RBP: 00007fc7112af000 R08: 0000000000000009 R09: 0000000000001000 [ 30.901398] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592b69cbec0 [ 30.903275] R13: 00007fff465d9140 R14: 00007fff465d9170 R15: 00007fff465d94d0 [ 30.904926] [ 30.905435] [ 30.905768] Allocated by task 213: [ 30.906539] kasan_save_stack+0x22/0x50 [ 30.907520] kasan_set_track+0x25/0x30 [ 30.908569] __kasan_slab_alloc+0x59/0x70 [ 30.909476] kmem_cache_alloc+0x16b/0x370 [ 30.910260] vm_area_dup+0x20/0x160 [ 30.911033] __split_vma+0x170/0x950 [ 30.911838] split_vma+0xc6/0x110 [ 30.912550] mprotect_fixup+0x8d2/0xb30 [ 30.913327] do_mprotect_pkey+0x87e/0xd40 [ 30.913754] __x64_sys_mprotect+0x78/0xc0 [ 30.914084] do_syscall_64+0x3f/0x90 [ 30.914395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914822] [ 30.914962] Freed by task 213: [ 30.915220] kasan_save_stack+0x22/0x50 [ 30.915542] kasan_set_track+0x25/0x30 [ 30.915869] kasan_save_free_info+0x2b/0x50 [ 30.916222] __kasan_slab_free+0x10a/0x190 [ 30.916574] kmem_cache_free+0x10d/0x4d0 [ 30.916915] rcu_core+0x8c8/0x2860 [ 30.917214] __do_softirq+0x1b7/0x7d4 [ 30.917565] [ 30.917709] Last potentially related work creation: [ 30.918106] kasan_save_stack+0x22/0x50 [ 30.918451] __kasan_record_aux_stack+0x8e/0xa0 [ 30.918830] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.919222] remove_vma+0x139/0x170 [ 30.919539] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.919913] do_vmi_munmap+0x1f1/0x2b0 [ 30.920232] __vm_munmap+0x138/0x3a0 [ 30.920535] __x64_sys_munmap+0x59/0x80 [ 30.920854] do_syscall_64+0x3f/0x90 [ 30.921168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.921611] [ 30.921751] The buggy address belongs to the object at ffff8880193a4bc8 [ 30.921751] which belongs to the cache vm_area_struct of size 168 [ 30.922716] The buggy address is located 88 bytes inside of [ 30.922716] freed 168-byte region [ffff8880193a4bc8, ffff8880193a4c70) [ 30.923620] [ 30.923794] The buggy address belongs to the physical page: [ 30.924267] page:000000005a52bada refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x193a4 [ 30.924988] memcg:ffff88801927b801 [ 30.925272] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.925734] page_type: 0xffffffff() [ 30.926021] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.926611] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801927b801 [ 30.927203] page dumped because: kasan: bad access detected [ 30.927628] [ 30.927763] Memory state around the buggy address: [ 30.928156] ffff8880193a4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.928747] ffff8880193a4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.929381] >ffff8880193a4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.929947] ^ [ 30.930286] ffff8880193a4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.930850] ffff8880193a4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.931426] ================================================================== [ 30.932154] Disabling lock debugging due to kernel taint [ 32.732571] BUG: Bad rss-counter state mm:00000000ee508ed2 type:MM_FILEPAGES val:33 [ 32.733231] BUG: Bad rss-counter state mm:00000000ee508ed2 type:MM_ANONPAGES val:22 [ 33.201830] BUG: Bad rss-counter state mm:000000009f2e2f17 type:MM_FILEPAGES val:33 [ 33.202507] BUG: Bad rss-counter state mm:000000009f2e2f17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55699' (ECDSA) to the list of known hosts. 2023/06/21 10:37:18 fuzzer started 2023/06/21 10:37:18 dialing manager at localhost:36067 2023/06/21 10:37:18 checking machine... 2023/06/21 10:37:18 checking revisions... [ 33.895514] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:37:18 testing simple program... [ 33.943155] cgroup: Unknown subsys name 'net' [ 33.994605] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:37:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff81880bc3 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000028537 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015b83680 R15=ffff8880164742e0 RIP=ffffffff813ad47e RFL=00000286 [--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 =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=00007f97a9403790 CR3=000000001a782000 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=0000000000000018fffffffe7ffbfeff XMM01=153df88fa6af1ee00000565100000030 XMM02=153df88fa6af1ee0dd93743da8e95385 XMM03=0000000000000002de93743da8e95385 XMM04=00000000000000008000000000000006 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=c9a9fcc44a2171f30000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001e02f1b RSI=ffffffff846000aa RDI=ffff88800f0178d8 RBP=ffff88800f017970 RSP=ffff88800f017868 R8 =0000000000000001 R9 =ffff88800f017918 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800f0179a0 R13=0000000000000000 R14=ffff888015b83680 R15=ffff88800f0178d8 RIP=ffffffff811305fa RFL=00000092 [--S-A--] 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 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=00007fee29dfa260 CR3=000000001a782000 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=756e696c2d34365f3638782f62696c2f XMM01=646d657473797362696c2f756e672d78 XMM02=00302e6f732e646d657473797362696c XMM03=2f756e672d78756e696c2d34365f3638 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000