syzkaller login: [ 228.712955] BUG: Bad rss-counter state mm:0000000045314ed0 type:MM_FILEPAGES val:33 [ 228.714387] BUG: Bad rss-counter state mm:0000000045314ed0 type:MM_ANONPAGES val:22 [ 228.854194] ================================================================== [ 228.855149] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 228.856167] Read of size 8 at addr ffff88801458ad08 by task sshd/227 [ 228.857014] [ 228.857253] CPU: 0 PID: 227 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 228.858361] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 228.859402] Call Trace: [ 228.859752] [ 228.860075] dump_stack_lvl+0x91/0xf0 [ 228.860616] print_report+0xcc/0x620 [ 228.861297] ? __virt_addr_valid+0x102/0x340 [ 228.861947] ? vma_interval_tree_remove+0xc75/0xec0 [ 228.862682] ? vma_interval_tree_remove+0xc75/0xec0 [ 228.863407] kasan_report+0xbe/0xf0 [ 228.863996] ? vma_interval_tree_remove+0xc75/0xec0 [ 228.864827] vma_interval_tree_remove+0xc75/0xec0 [ 228.865659] vma_prepare+0xc54/0x11a0 [ 228.866244] __split_vma+0x5af/0x950 [ 228.866816] ? __pfx___split_vma+0x10/0x10 [ 228.867580] ? find_held_lock+0x2c/0x110 [ 228.868321] do_vmi_align_munmap+0x2ba/0x11f0 [ 228.869034] ? lock_is_held_type+0x9f/0x120 [ 228.869693] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 228.870457] ? mtree_range_walk+0x632/0x900 [ 228.871216] ? mas_walk+0x5c7/0x7c0 [ 228.871793] do_vmi_munmap+0x1f1/0x2b0 [ 228.872416] mmap_region+0x1f9/0x2660 [ 228.872980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 228.873497] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 228.874210] ? __pfx_lock_acquire+0x10/0x10 [ 228.874744] ? __pfx_mmap_region+0x10/0x10 [ 228.875343] ? security_mmap_addr+0x7d/0xa0 [ 228.875977] ? get_unmapped_area+0x1f5/0x3f0 [ 228.876540] do_mmap+0x854/0xf00 [ 228.877043] vm_mmap_pgoff+0x1a6/0x3a0 [ 228.877541] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 228.878102] ksys_mmap_pgoff+0x3af/0x500 [ 228.878623] do_syscall_64+0x3f/0x90 [ 228.879102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 228.879746] RIP: 0033:0x7f909b509d82 [ 228.880206] 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 [ 228.882498] RSP: 002b:00007ffe37378738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 228.883512] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f909b509d82 [ 228.884365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f909a943000 [ 228.885224] RBP: 00007f909a943000 R08: 0000000000000009 R09: 0000000000001000 [ 228.886071] R10: 0000000000000812 R11: 0000000000000206 R12: 000056041b4d3ec0 [ 228.886913] R13: 00007ffe37378750 R14: 00007ffe37378780 R15: 00007ffe37378ae0 [ 228.887773] [ 228.888112] [ 228.888332] Allocated by task 220: [ 228.888767] kasan_save_stack+0x22/0x50 [ 228.889268] kasan_set_track+0x25/0x30 [ 228.889756] __kasan_slab_alloc+0x59/0x70 [ 228.890333] kmem_cache_alloc+0x16b/0x370 [ 228.890978] vm_area_dup+0x20/0x160 [ 228.891442] __split_vma+0x170/0x950 [ 228.891908] split_vma+0xc6/0x110 [ 228.892346] mprotect_fixup+0x8d2/0xb30 [ 228.892862] do_mprotect_pkey+0x87e/0xd40 [ 228.893383] __x64_sys_mprotect+0x78/0xc0 [ 228.893949] do_syscall_64+0x3f/0x90 [ 228.894435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 228.895089] [ 228.895302] Freed by task 220: [ 228.895697] kasan_save_stack+0x22/0x50 [ 228.896200] kasan_set_track+0x25/0x30 [ 228.896708] kasan_save_free_info+0x2b/0x50 [ 228.897248] __kasan_slab_free+0x10a/0x190 [ 228.897891] kmem_cache_free+0x10d/0x4d0 [ 228.898505] rcu_core+0x8c8/0x2860 [ 228.898965] __do_softirq+0x1b7/0x7d4 [ 228.899526] [ 228.899757] Last potentially related work creation: [ 228.900359] kasan_save_stack+0x22/0x50 [ 228.900893] __kasan_record_aux_stack+0x8e/0xa0 [ 228.901500] __call_rcu_common.constprop.0+0x6a/0xb90 [ 228.902157] remove_vma+0x139/0x170 [ 228.902622] do_vmi_align_munmap+0xd4a/0x11f0 [ 228.903197] do_vmi_munmap+0x1f1/0x2b0 [ 228.903698] __vm_munmap+0x138/0x3a0 [ 228.904178] __x64_sys_munmap+0x59/0x80 [ 228.904711] do_syscall_64+0x3f/0x90 [ 228.905273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 228.906047] [ 228.906267] The buggy address belongs to the object at ffff88801458acb0 [ 228.906267] which belongs to the cache vm_area_struct of size 168 [ 228.907793] The buggy address is located 88 bytes inside of [ 228.907793] freed 168-byte region [ffff88801458acb0, ffff88801458ad58) [ 228.909273] [ 228.909494] The buggy address belongs to the physical page: [ 228.910182] page:00000000900a0b89 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1458a [ 228.911400] memcg:ffff88800ff51d01 [ 228.911838] flags: 0x100000000000200(slab|node=0|zone=1) [ 228.912522] page_type: 0xffffffff() [ 228.912986] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 228.914147] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff51d01 [ 228.915084] page dumped because: kasan: bad access detected [ 228.915781] [ 228.916003] Memory state around the buggy address: [ 228.916616] ffff88801458ac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 228.917579] ffff88801458ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 228.918464] >ffff88801458ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 228.919337] ^ [ 228.919794] ffff88801458ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 228.920730] ffff88801458ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 228.921755] ================================================================== [ 228.922941] Disabling lock debugging due to kernel taint [ 231.302957] BUG: Bad rss-counter state mm:0000000061e3b0c6 type:MM_FILEPAGES val:33 [ 231.304105] BUG: Bad rss-counter state mm:0000000061e3b0c6 type:MM_ANONPAGES val:22 [ 231.814221] BUG: Bad rss-counter state mm:00000000395c5847 type:MM_FILEPAGES val:33 [ 231.815234] BUG: Bad rss-counter state mm:00000000395c5847 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62832' (ECDSA) to the list of known hosts. 2023/06/20 05:00:48 fuzzer started 2023/06/20 05:00:48 dialing manager at localhost:44161 2023/06/20 05:00:48 checking machine... 2023/06/20 05:00:48 checking revisions... [ 232.492832] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:00:48 testing simple program... [ 232.547078] cgroup: Unknown subsys name 'net' [ 232.587342] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:58:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806ce09a08 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000000 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff888018311b30 RIP=ffffffff812d8a0e 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=00007f786be83f20 CR3=000000000c50a000 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=90bfb6d9371488a0c1433b97dbe2097f XMM02=ec2efd57dc4c00df000000000015b1d0 XMM03=238d517e90028468000000000015b2a0 XMM04=05d642b13354fd1700000000000ae988 XMM05=0b39c798a71319b60000000000179f78 XMM06=0bfe16ac049f0d250000000000179150 XMM07=e042d86d42eb936e0000000000161728 XMM08=238d517e90028468000000000015b2a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000febc007 RCX=ffffffff8170b1df RDX=ffff888016bc0000 RSI=0000000000000000 RDI=0000000000000006 RBP=000000000febc067 RSP=ffff8880181af790 R8 =0000000000000006 R9 =00007fffffffffff R10=00007f9084dbafff R11=0000000000000000 R12=00007fffffffffff R13=00007f9084dbb000 R14=00007f9084dbafff R15=dffffc0000000000 RIP=ffffffff814c07e0 RFL=00000206 [-----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 00007f9084de8900 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=00007f9084dc7020 CR3=000000001471a000 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=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